KASAN: use-after-free Read in br_dev_xmit
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syzbot
Dec 18, 2021, 10:10:25 PM12/18/21
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 3f8a27f9e27b Linux 4.19.211
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=176e9495b00000
kernel config: https://syzkaller.appspot.com/x/.config?x=9b9277b418617afe
dashboard link: https://syzkaller.appspot.com/bug?extid=f0b88ff740ba5aeb8772
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f0b88f...@syzkaller.appspotmail.com
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
==================================================================
BUG: KASAN: use-after-free in br_dev_xmit+0x12b3/0x13e0 net/bridge/br_device.c:68
netlink: 'syz-executor.3': attribute type 1 has an invalid length.
Read of size 2 at addr ffff8880178bd68e by task kworker/u4:4/14889
CPU: 1 PID: 14889 Comm: kworker/u4:4 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354
kasan_report mm/kasan/report.c:412 [inline]
__asan_report_load_n_noabort+0x8b/0xa0 mm/kasan/report.c:443
br_dev_xmit+0x12b3/0x13e0 net/bridge/br_device.c:68
device bridge6 entered promiscuous mode
__netdev_start_xmit include/linux/netdevice.h:4349 [inline]
netdev_start_xmit include/linux/netdevice.h:4363 [inline]
xmit_one net/core/dev.c:3256 [inline]
dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272
__dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838
vlan_dev_hard_start_xmit+0x38f/0x800 net/8021q/vlan_dev.c:131
__netdev_start_xmit include/linux/netdevice.h:4349 [inline]
netdev_start_xmit include/linux/netdevice.h:4363 [inline]
xmit_one net/core/dev.c:3256 [inline]
dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272
__dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838
neigh_connected_output+0x3e8/0x5e0 net/core/neighbour.c:1403
neigh_output include/net/neighbour.h:501 [inline]
ip6_finish_output2+0x113d/0x2290 net/ipv6/ip6_output.c:120
ip6_finish_output+0x89b/0x10f0 net/ipv6/ip6_output.c:192
NF_HOOK_COND include/linux/netfilter.h:278 [inline]
ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209
dst_output include/net/dst.h:455 [inline]
NF_HOOK include/linux/netfilter.h:289 [inline]
mld_sendpack+0x674/0x1060 net/ipv6/mcast.c:1681
mld_send_cr net/ipv6/mcast.c:1977 [inline]
mld_ifc_timer_expire+0x616/0xdf0 net/ipv6/mcast.c:2476
call_timer_fn+0x177/0x700 kernel/time/timer.c:1338
expire_timers+0x243/0x4e0 kernel/time/timer.c:1375
__run_timers kernel/time/timer.c:1696 [inline]
run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709
__do_softirq+0x265/0x980 kernel/softirq.c:292
invoke_softirq kernel/softirq.c:372 [inline]
irq_exit+0x215/0x260 kernel/softirq.c:412
exiting_irq arch/x86/include/asm/apic.h:536 [inline]
smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
</IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline]
RIP: 0010:lock_release+0x429/0x8b0 kernel/locking/lockdep.c:3930
Code: 84 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 95 03 00 00 48 83 3d 7b 34 a6 08 00 0f 84 cc 01 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 49 c7 04 04 00 00 00
RSP: 0018:ffff8880a54c7a90 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff13e3051 RBX: ffff8880303ae1c0 RCX: 1ffff11006075d58
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: 0000000000000286
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000003
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff11014a98f55
R13: 14e040cfc7839df5 R14: ffff8880303ae1c0 R15: 0000000000000004
rcu_lock_release include/linux/rcupdate.h:247 [inline]
rcu_read_unlock include/linux/rcupdate.h:681 [inline]
inet_twsk_purge+0x558/0x7c0 net/ipv4/inet_timewait_sock.c:298
ops_exit_list+0xf9/0x150 net/core/net_namespace.c:156
cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:554
process_one_work+0x864/0x1570 kernel/workqueue.c:2153
worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Allocated by task 14889:
__do_kmalloc_node mm/slab.c:3689 [inline]
__kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3703
__kmalloc_reserve net/core/skbuff.c:137 [inline]
__alloc_skb+0xae/0x560 net/core/skbuff.c:205
alloc_skb include/linux/skbuff.h:995 [inline]
alloc_skb_with_frags+0x92/0x570 net/core/skbuff.c:5333
sock_alloc_send_pskb+0x6e1/0x830 net/core/sock.c:2108
mld_newpack+0x1d2/0x760 net/ipv6/mcast.c:1609
add_grhead+0x265/0x330 net/ipv6/mcast.c:1712
add_grec+0xe3c/0x10b0 net/ipv6/mcast.c:1843
mld_send_cr net/ipv6/mcast.c:1969 [inline]
mld_ifc_timer_expire+0x5a2/0xdf0 net/ipv6/mcast.c:2476
call_timer_fn+0x177/0x700 kernel/time/timer.c:1338
expire_timers+0x243/0x4e0 kernel/time/timer.c:1375
__run_timers kernel/time/timer.c:1696 [inline]
run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709
__do_softirq+0x265/0x980 kernel/softirq.c:292
Freed by task 14889:
__cache_free mm/slab.c:3503 [inline]
kfree+0xcc/0x210 mm/slab.c:3822
skb_free_head net/core/skbuff.c:563 [inline]
pskb_expand_head+0x327/0xf20 net/core/skbuff.c:1506
__skb_cow include/linux/skbuff.h:2977 [inline]
skb_cow_head include/linux/skbuff.h:3011 [inline]
__vlan_insert_inner_tag include/linux/if_vlan.h:346 [inline]
vlan_insert_inner_tag include/linux/if_vlan.h:416 [inline]
vlan_insert_tag include/linux/if_vlan.h:441 [inline]
vlan_insert_tag_set_proto include/linux/if_vlan.h:460 [inline]
__allowed_ingress net/bridge/br_vlan.c:437 [inline]
br_allowed_ingress+0x376/0xed0 net/bridge/br_vlan.c:514
br_dev_xmit+0x3e5/0x13e0 net/bridge/br_device.c:64
__netdev_start_xmit include/linux/netdevice.h:4349 [inline]
netdev_start_xmit include/linux/netdevice.h:4363 [inline]
xmit_one net/core/dev.c:3256 [inline]
dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272
__dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838
vlan_dev_hard_start_xmit+0x38f/0x800 net/8021q/vlan_dev.c:131
__netdev_start_xmit include/linux/netdevice.h:4349 [inline]
netdev_start_xmit include/linux/netdevice.h:4363 [inline]
xmit_one net/core/dev.c:3256 [inline]
dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272
__dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838
neigh_connected_output+0x3e8/0x5e0 net/core/neighbour.c:1403
neigh_output include/net/neighbour.h:501 [inline]
ip6_finish_output2+0x113d/0x2290 net/ipv6/ip6_output.c:120
ip6_finish_output+0x89b/0x10f0 net/ipv6/ip6_output.c:192
NF_HOOK_COND include/linux/netfilter.h:278 [inline]
ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209
dst_output include/net/dst.h:455 [inline]
NF_HOOK include/linux/netfilter.h:289 [inline]
mld_sendpack+0x674/0x1060 net/ipv6/mcast.c:1681
mld_send_cr net/ipv6/mcast.c:1977 [inline]
mld_ifc_timer_expire+0x616/0xdf0 net/ipv6/mcast.c:2476
call_timer_fn+0x177/0x700 kernel/time/timer.c:1338
expire_timers+0x243/0x4e0 kernel/time/timer.c:1375
__run_timers kernel/time/timer.c:1696 [inline]
run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709
__do_softirq+0x265/0x980 kernel/softirq.c:292
The buggy address belongs to the object at ffff8880178bd680
which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 14 bytes inside of
2048-byte region [ffff8880178bd680, ffff8880178bde80)
The buggy address belongs to the page:
page:ffffea00005e2f00 count:1 mapcount:0 mapping:ffff88813bff0c40 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffffea0002d11888 ffffea0000d2a308 ffff88813bff0c40
raw: 0000000000000000 ffff8880178bc580 0000000100000003 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8880178bd580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880178bd600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880178bd680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880178bd700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880178bd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 84 08 test %cl,(%rax)
2: 00 00 add %al,(%rax)
4: 00 00 add %al,(%rax)
6: 00 00 add %al,(%rax)
8: 48 c1 e8 03 shr $0x3,%rax
c: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1)
10: 0f 85 95 03 00 00 jne 0x3ab
16: 48 83 3d 7b 34 a6 08 cmpq $0x0,0x8a6347b(%rip) # 0x8a63499
1d: 00
1e: 0f 84 cc 01 00 00 je 0x1f0
24: 48 8b 3c 24 mov (%rsp),%rdi
28: 57 push %rdi
29: 9d popfq
* 2a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction
2f: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
36: fc ff df
39: 49 rex.WB
3a: c7 .byte 0xc7
3b: 04 04 add $0x4,%al
3d: 00 00 add %al,(%rax)
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following issue on:
HEAD commit: 3f8a27f9e27b Linux 4.19.211
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=176e9495b00000
kernel config: https://syzkaller.appspot.com/x/.config?x=9b9277b418617afe
dashboard link: https://syzkaller.appspot.com/bug?extid=f0b88ff740ba5aeb8772
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f0b88f...@syzkaller.appspotmail.com
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
==================================================================
BUG: KASAN: use-after-free in br_dev_xmit+0x12b3/0x13e0 net/bridge/br_device.c:68
netlink: 'syz-executor.3': attribute type 1 has an invalid length.
Read of size 2 at addr ffff8880178bd68e by task kworker/u4:4/14889
CPU: 1 PID: 14889 Comm: kworker/u4:4 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354
kasan_report mm/kasan/report.c:412 [inline]
__asan_report_load_n_noabort+0x8b/0xa0 mm/kasan/report.c:443
br_dev_xmit+0x12b3/0x13e0 net/bridge/br_device.c:68
device bridge6 entered promiscuous mode
__netdev_start_xmit include/linux/netdevice.h:4349 [inline]
netdev_start_xmit include/linux/netdevice.h:4363 [inline]
xmit_one net/core/dev.c:3256 [inline]
dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272
__dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838
vlan_dev_hard_start_xmit+0x38f/0x800 net/8021q/vlan_dev.c:131
__netdev_start_xmit include/linux/netdevice.h:4349 [inline]
netdev_start_xmit include/linux/netdevice.h:4363 [inline]
xmit_one net/core/dev.c:3256 [inline]
dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272
__dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838
neigh_connected_output+0x3e8/0x5e0 net/core/neighbour.c:1403
neigh_output include/net/neighbour.h:501 [inline]
ip6_finish_output2+0x113d/0x2290 net/ipv6/ip6_output.c:120
ip6_finish_output+0x89b/0x10f0 net/ipv6/ip6_output.c:192
NF_HOOK_COND include/linux/netfilter.h:278 [inline]
ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209
dst_output include/net/dst.h:455 [inline]
NF_HOOK include/linux/netfilter.h:289 [inline]
mld_sendpack+0x674/0x1060 net/ipv6/mcast.c:1681
mld_send_cr net/ipv6/mcast.c:1977 [inline]
mld_ifc_timer_expire+0x616/0xdf0 net/ipv6/mcast.c:2476
call_timer_fn+0x177/0x700 kernel/time/timer.c:1338
expire_timers+0x243/0x4e0 kernel/time/timer.c:1375
__run_timers kernel/time/timer.c:1696 [inline]
run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709
__do_softirq+0x265/0x980 kernel/softirq.c:292
invoke_softirq kernel/softirq.c:372 [inline]
irq_exit+0x215/0x260 kernel/softirq.c:412
exiting_irq arch/x86/include/asm/apic.h:536 [inline]
smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
</IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline]
RIP: 0010:lock_release+0x429/0x8b0 kernel/locking/lockdep.c:3930
Code: 84 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 95 03 00 00 48 83 3d 7b 34 a6 08 00 0f 84 cc 01 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 49 c7 04 04 00 00 00
RSP: 0018:ffff8880a54c7a90 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff13e3051 RBX: ffff8880303ae1c0 RCX: 1ffff11006075d58
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: 0000000000000286
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000003
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff11014a98f55
R13: 14e040cfc7839df5 R14: ffff8880303ae1c0 R15: 0000000000000004
rcu_lock_release include/linux/rcupdate.h:247 [inline]
rcu_read_unlock include/linux/rcupdate.h:681 [inline]
inet_twsk_purge+0x558/0x7c0 net/ipv4/inet_timewait_sock.c:298
ops_exit_list+0xf9/0x150 net/core/net_namespace.c:156
cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:554
process_one_work+0x864/0x1570 kernel/workqueue.c:2153
worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Allocated by task 14889:
__do_kmalloc_node mm/slab.c:3689 [inline]
__kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3703
__kmalloc_reserve net/core/skbuff.c:137 [inline]
__alloc_skb+0xae/0x560 net/core/skbuff.c:205
alloc_skb include/linux/skbuff.h:995 [inline]
alloc_skb_with_frags+0x92/0x570 net/core/skbuff.c:5333
sock_alloc_send_pskb+0x6e1/0x830 net/core/sock.c:2108
mld_newpack+0x1d2/0x760 net/ipv6/mcast.c:1609
add_grhead+0x265/0x330 net/ipv6/mcast.c:1712
add_grec+0xe3c/0x10b0 net/ipv6/mcast.c:1843
mld_send_cr net/ipv6/mcast.c:1969 [inline]
mld_ifc_timer_expire+0x5a2/0xdf0 net/ipv6/mcast.c:2476
call_timer_fn+0x177/0x700 kernel/time/timer.c:1338
expire_timers+0x243/0x4e0 kernel/time/timer.c:1375
__run_timers kernel/time/timer.c:1696 [inline]
run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709
__do_softirq+0x265/0x980 kernel/softirq.c:292
Freed by task 14889:
__cache_free mm/slab.c:3503 [inline]
kfree+0xcc/0x210 mm/slab.c:3822
skb_free_head net/core/skbuff.c:563 [inline]
pskb_expand_head+0x327/0xf20 net/core/skbuff.c:1506
__skb_cow include/linux/skbuff.h:2977 [inline]
skb_cow_head include/linux/skbuff.h:3011 [inline]
__vlan_insert_inner_tag include/linux/if_vlan.h:346 [inline]
vlan_insert_inner_tag include/linux/if_vlan.h:416 [inline]
vlan_insert_tag include/linux/if_vlan.h:441 [inline]
vlan_insert_tag_set_proto include/linux/if_vlan.h:460 [inline]
__allowed_ingress net/bridge/br_vlan.c:437 [inline]
br_allowed_ingress+0x376/0xed0 net/bridge/br_vlan.c:514
br_dev_xmit+0x3e5/0x13e0 net/bridge/br_device.c:64
__netdev_start_xmit include/linux/netdevice.h:4349 [inline]
netdev_start_xmit include/linux/netdevice.h:4363 [inline]
xmit_one net/core/dev.c:3256 [inline]
dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272
__dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838
vlan_dev_hard_start_xmit+0x38f/0x800 net/8021q/vlan_dev.c:131
__netdev_start_xmit include/linux/netdevice.h:4349 [inline]
netdev_start_xmit include/linux/netdevice.h:4363 [inline]
xmit_one net/core/dev.c:3256 [inline]
dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272
__dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838
neigh_connected_output+0x3e8/0x5e0 net/core/neighbour.c:1403
neigh_output include/net/neighbour.h:501 [inline]
ip6_finish_output2+0x113d/0x2290 net/ipv6/ip6_output.c:120
ip6_finish_output+0x89b/0x10f0 net/ipv6/ip6_output.c:192
NF_HOOK_COND include/linux/netfilter.h:278 [inline]
ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209
dst_output include/net/dst.h:455 [inline]
NF_HOOK include/linux/netfilter.h:289 [inline]
mld_sendpack+0x674/0x1060 net/ipv6/mcast.c:1681
mld_send_cr net/ipv6/mcast.c:1977 [inline]
mld_ifc_timer_expire+0x616/0xdf0 net/ipv6/mcast.c:2476
call_timer_fn+0x177/0x700 kernel/time/timer.c:1338
expire_timers+0x243/0x4e0 kernel/time/timer.c:1375
__run_timers kernel/time/timer.c:1696 [inline]
run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709
__do_softirq+0x265/0x980 kernel/softirq.c:292
The buggy address belongs to the object at ffff8880178bd680
which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 14 bytes inside of
2048-byte region [ffff8880178bd680, ffff8880178bde80)
The buggy address belongs to the page:
page:ffffea00005e2f00 count:1 mapcount:0 mapping:ffff88813bff0c40 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffffea0002d11888 ffffea0000d2a308 ffff88813bff0c40
raw: 0000000000000000 ffff8880178bc580 0000000100000003 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8880178bd580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880178bd600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880178bd680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880178bd700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880178bd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 84 08 test %cl,(%rax)
2: 00 00 add %al,(%rax)
4: 00 00 add %al,(%rax)
6: 00 00 add %al,(%rax)
8: 48 c1 e8 03 shr $0x3,%rax
c: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1)
10: 0f 85 95 03 00 00 jne 0x3ab
16: 48 83 3d 7b 34 a6 08 cmpq $0x0,0x8a6347b(%rip) # 0x8a63499
1d: 00
1e: 0f 84 cc 01 00 00 je 0x1f0
24: 48 8b 3c 24 mov (%rsp),%rdi
28: 57 push %rdi
29: 9d popfq
* 2a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction
2f: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
36: fc ff df
39: 49 rex.WB
3a: c7 .byte 0xc7
3b: 04 04 add $0x4,%al
3d: 00 00 add %al,(%rax)
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot
Dec 18, 2021, 10:36:19 PM12/18/21
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: 3f8a27f9e27b Linux 4.19.211
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=10666d49b00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=153ac293b00000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f0b88f...@syzkaller.appspotmail.com
bond0: Enslaving vlan3 as an active interface with an up link
device bridge14 entered promiscuous mode
team0: Port device vlan4 added
device bridge15 entered promiscuous mode
==================================================================
BUG: KASAN: use-after-free in br_dev_xmit+0x12b3/0x13e0 net/bridge/br_device.c:68 net/bridge/br_device.c:68
Read of size 2 at addr ffff8880aed5eb8e by task swapper/1/0
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.19.211-syzkaller #0
dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 lib/dump_stack.c:118
print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 mm/kasan/report.c:256
kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 mm/kasan/report.c:354
kasan_report mm/kasan/report.c:412 [inline]
kasan_report mm/kasan/report.c:412 [inline] mm/kasan/report.c:443
__asan_report_load_n_noabort+0x8b/0xa0 mm/kasan/report.c:443 mm/kasan/report.c:443
br_dev_xmit+0x12b3/0x13e0 net/bridge/br_device.c:68 net/bridge/br_device.c:68
netdev_start_xmit include/linux/netdevice.h:4363 [inline] net/core/dev.c:3272
xmit_one net/core/dev.c:3256 [inline] net/core/dev.c:3272
dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272 net/core/dev.c:3272
__dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838 net/core/dev.c:3838
vlan_dev_hard_start_xmit+0x38f/0x800 net/8021q/vlan_dev.c:131 net/8021q/vlan_dev.c:131
netdev_start_xmit include/linux/netdevice.h:4363 [inline] net/core/dev.c:3272
xmit_one net/core/dev.c:3256 [inline] net/core/dev.c:3272
dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272 net/core/dev.c:3272
__dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838 net/core/dev.c:3838
neigh_connected_output+0x3e8/0x5e0 net/core/neighbour.c:1403 net/core/neighbour.c:1403
neigh_output include/net/neighbour.h:501 [inline]
neigh_output include/net/neighbour.h:501 [inline] net/ipv6/ip6_output.c:120
ip6_finish_output2+0x113d/0x2290 net/ipv6/ip6_output.c:120 net/ipv6/ip6_output.c:120
ip6_finish_output+0x89b/0x10f0 net/ipv6/ip6_output.c:192 net/ipv6/ip6_output.c:192
NF_HOOK_COND include/linux/netfilter.h:278 [inline]
NF_HOOK_COND include/linux/netfilter.h:278 [inline] net/ipv6/ip6_output.c:209
ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209 net/ipv6/ip6_output.c:209
NF_HOOK include/linux/netfilter.h:289 [inline] net/ipv6/mcast.c:1681
mld_sendpack+0x674/0x1060 net/ipv6/mcast.c:1681 net/ipv6/mcast.c:1681
mld_send_cr net/ipv6/mcast.c:1977 [inline]
mld_send_cr net/ipv6/mcast.c:1977 [inline] net/ipv6/mcast.c:2476
mld_ifc_timer_expire+0x616/0xdf0 net/ipv6/mcast.c:2476 net/ipv6/mcast.c:2476
call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 kernel/time/timer.c:1338
expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 kernel/time/timer.c:1375
__run_timers kernel/time/timer.c:1696 [inline]
__run_timers kernel/time/timer.c:1696 [inline] kernel/time/timer.c:1709
run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 kernel/time/timer.c:1709
__do_softirq+0x265/0x980 kernel/softirq.c:292 kernel/softirq.c:292
invoke_softirq kernel/softirq.c:372 [inline]
invoke_softirq kernel/softirq.c:372 [inline] kernel/softirq.c:412
irq_exit+0x215/0x260 kernel/softirq.c:412 kernel/softirq.c:412
exiting_irq arch/x86/include/asm/apic.h:536 [inline]
exiting_irq arch/x86/include/asm/apic.h:536 [inline] arch/x86/kernel/apic/apic.c:1098
smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 arch/x86/kernel/apic/apic.c:1098
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 arch/x86/entry/entry_64.S:894
</IRQ>
RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61 arch/x86/include/asm/irqflags.h:61
Code: 48 89 df e8 f4 20 7f f9 e9 2e ff ff ff 48 89 df e8 e7 20 7f f9 eb 82 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 14 43 4e 00 fb f4 <c3> 90 e9 07 00 00 00 0f 00 2d 04 43 4e 00 f4 c3 90 90 41 56 41 55
RSP: 0018:ffff8880b5a9fd40 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff13e3054 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880b5a86c44
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89f18290
R13: 1ffff11016b53fb2 R14: 0000000000000000 R15: 0000000000000000
arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline]
arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] arch/x86/kernel/process.c:557
default_idle+0x49/0x310 arch/x86/kernel/process.c:557 arch/x86/kernel/process.c:557
cpuidle_idle_call kernel/sched/idle.c:153 [inline]
cpuidle_idle_call kernel/sched/idle.c:153 [inline] kernel/sched/idle.c:263
do_idle+0x2ec/0x4b0 kernel/sched/idle.c:263 kernel/sched/idle.c:263
cpu_startup_entry+0xc5/0xe0 kernel/sched/idle.c:369 kernel/sched/idle.c:369
start_secondary+0x435/0x5c0 arch/x86/kernel/smpboot.c:271 arch/x86/kernel/smpboot.c:271
secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 arch/x86/kernel/head_64.S:243
Allocated by task 0:
__do_kmalloc_node mm/slab.c:3689 [inline]
__do_kmalloc_node mm/slab.c:3689 [inline] mm/slab.c:3703
__kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3703 mm/slab.c:3703
__kmalloc_reserve net/core/skbuff.c:137 [inline]
__kmalloc_reserve net/core/skbuff.c:137 [inline] net/core/skbuff.c:205
__alloc_skb+0xae/0x560 net/core/skbuff.c:205 net/core/skbuff.c:205
alloc_skb include/linux/skbuff.h:995 [inline]
alloc_skb include/linux/skbuff.h:995 [inline] net/core/skbuff.c:5333
alloc_skb_with_frags+0x92/0x570 net/core/skbuff.c:5333 net/core/skbuff.c:5333
sock_alloc_send_pskb+0x6e1/0x830 net/core/sock.c:2108 net/core/sock.c:2108
mld_newpack+0x1d2/0x760 net/ipv6/mcast.c:1609 net/ipv6/mcast.c:1609
add_grhead+0x265/0x330 net/ipv6/mcast.c:1712 net/ipv6/mcast.c:1712
add_grec+0xe3c/0x10b0 net/ipv6/mcast.c:1843 net/ipv6/mcast.c:1843
mld_send_cr net/ipv6/mcast.c:1969 [inline]
mld_send_cr net/ipv6/mcast.c:1969 [inline] net/ipv6/mcast.c:2476
mld_ifc_timer_expire+0x5a2/0xdf0 net/ipv6/mcast.c:2476 net/ipv6/mcast.c:2476
call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 kernel/time/timer.c:1338
expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 kernel/time/timer.c:1375
__run_timers kernel/time/timer.c:1696 [inline]
__run_timers kernel/time/timer.c:1696 [inline] kernel/time/timer.c:1709
run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 kernel/time/timer.c:1709
__do_softirq+0x265/0x980 kernel/softirq.c:292 kernel/softirq.c:292
Freed by task 0:
__cache_free mm/slab.c:3503 [inline]
__cache_free mm/slab.c:3503 [inline] mm/slab.c:3822
kfree+0xcc/0x210 mm/slab.c:3822 mm/slab.c:3822
skb_free_head net/core/skbuff.c:563 [inline]
skb_free_head net/core/skbuff.c:563 [inline] net/core/skbuff.c:1506
pskb_expand_head+0x327/0xf20 net/core/skbuff.c:1506 net/core/skbuff.c:1506
skb_cow_head include/linux/skbuff.h:3011 [inline] net/bridge/br_vlan.c:514
__vlan_insert_inner_tag include/linux/if_vlan.h:346 [inline] net/bridge/br_vlan.c:514
vlan_insert_inner_tag include/linux/if_vlan.h:416 [inline] net/bridge/br_vlan.c:514
vlan_insert_tag include/linux/if_vlan.h:441 [inline] net/bridge/br_vlan.c:514
vlan_insert_tag_set_proto include/linux/if_vlan.h:460 [inline] net/bridge/br_vlan.c:514
__allowed_ingress net/bridge/br_vlan.c:437 [inline] net/bridge/br_vlan.c:514
br_allowed_ingress+0x376/0xed0 net/bridge/br_vlan.c:514 net/bridge/br_vlan.c:514
br_dev_xmit+0x3e5/0x13e0 net/bridge/br_device.c:64 net/bridge/br_device.c:64
netdev_start_xmit include/linux/netdevice.h:4363 [inline] net/core/dev.c:3272
xmit_one net/core/dev.c:3256 [inline] net/core/dev.c:3272
dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272 net/core/dev.c:3272
__dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838 net/core/dev.c:3838
vlan_dev_hard_start_xmit+0x38f/0x800 net/8021q/vlan_dev.c:131 net/8021q/vlan_dev.c:131
netdev_start_xmit include/linux/netdevice.h:4363 [inline] net/core/dev.c:3272
xmit_one net/core/dev.c:3256 [inline] net/core/dev.c:3272
dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272 net/core/dev.c:3272
__dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838 net/core/dev.c:3838
neigh_connected_output+0x3e8/0x5e0 net/core/neighbour.c:1403 net/core/neighbour.c:1403
neigh_output include/net/neighbour.h:501 [inline]
neigh_output include/net/neighbour.h:501 [inline] net/ipv6/ip6_output.c:120
ip6_finish_output2+0x113d/0x2290 net/ipv6/ip6_output.c:120 net/ipv6/ip6_output.c:120
ip6_finish_output+0x89b/0x10f0 net/ipv6/ip6_output.c:192 net/ipv6/ip6_output.c:192
NF_HOOK_COND include/linux/netfilter.h:278 [inline]
NF_HOOK_COND include/linux/netfilter.h:278 [inline] net/ipv6/ip6_output.c:209
ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209 net/ipv6/ip6_output.c:209
NF_HOOK include/linux/netfilter.h:289 [inline] net/ipv6/mcast.c:1681
mld_sendpack+0x674/0x1060 net/ipv6/mcast.c:1681 net/ipv6/mcast.c:1681
mld_send_cr net/ipv6/mcast.c:1977 [inline]
mld_send_cr net/ipv6/mcast.c:1977 [inline] net/ipv6/mcast.c:2476
mld_ifc_timer_expire+0x616/0xdf0 net/ipv6/mcast.c:2476 net/ipv6/mcast.c:2476
call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 kernel/time/timer.c:1338
expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 kernel/time/timer.c:1375
__run_timers kernel/time/timer.c:1696 [inline]
__run_timers kernel/time/timer.c:1696 [inline] kernel/time/timer.c:1709
run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 kernel/time/timer.c:1709
__do_softirq+0x265/0x980 kernel/softirq.c:292 kernel/softirq.c:292
The buggy address belongs to the object at ffff8880aed5eb80
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffffea000254b008 ffff88813bff1948 ffff88813bff0c40
raw: 0000000000000000 ffff8880aed5e300 0000000100000003 0000000000000000
ffff8880aed5eb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880aed5eb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880aed5ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880aed5ec80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
3: e8 f4 20 7f f9 callq 0xf97f20fc
8: e9 2e ff ff ff jmpq 0xffffff3b
d: 48 89 df mov %rbx,%rdi
10: e8 e7 20 7f f9 callq 0xf97f20fc
15: eb 82 jmp 0xffffff99
17: 90 nop
18: 90 nop
19: 90 nop
1a: 90 nop
1b: 90 nop
1c: e9 07 00 00 00 jmpq 0x28
21: 0f 00 2d 14 43 4e 00 verw 0x4e4314(%rip) # 0x4e433c
28: fb sti
29: f4 hlt
* 2a: c3 retq <-- trapping instruction
2b: 90 nop
2c: e9 07 00 00 00 jmpq 0x38
31: 0f 00 2d 04 43 4e 00 verw 0x4e4304(%rip) # 0x4e433c
38: f4 hlt
39: c3 retq
3a: 90 nop
3b: 90 nop
3c: 41 56 push %r14
3e: 41 55 push %r13
3: e8 f4 20 7f f9 callq 0xf97f20fc
8: e9 2e ff ff ff jmpq 0xffffff3b
d: 48 89 df mov %rbx,%rdi
10: e8 e7 20 7f f9 callq 0xf97f20fc
15: eb 82 jmp 0xffffff99
17: 90 nop
18: 90 nop
19: 90 nop
1a: 90 nop
1b: 90 nop
1c: e9 07 00 00 00 jmpq 0x28
21: 0f 00 2d 14 43 4e 00 verw 0x4e4314(%rip) # 0x4e433c
28: fb sti
29: f4 hlt
* 2a: c3 retq <-- trapping instruction
2b: 90 nop
2c: e9 07 00 00 00 jmpq 0x38
31: 0f 00 2d 04 43 4e 00 verw 0x4e4304(%rip) # 0x4e433c
38: f4 hlt
39: c3 retq
3a: 90 nop
3b: 90 nop
3c: 41 56 push %r14
3e: 41 55 push %r13
HEAD commit: 3f8a27f9e27b Linux 4.19.211
git tree: linux-4.19.y
kernel config: https://syzkaller.appspot.com/x/.config?x=9b9277b418617afe
dashboard link: https://syzkaller.appspot.com/bug?extid=f0b88ff740ba5aeb8772
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1737a80db00000
dashboard link: https://syzkaller.appspot.com/bug?extid=f0b88ff740ba5aeb8772
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=153ac293b00000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f0b88f...@syzkaller.appspotmail.com
device bridge14 entered promiscuous mode
team0: Port device vlan4 added
device bridge15 entered promiscuous mode
==================================================================
BUG: KASAN: use-after-free in br_dev_xmit+0x12b3/0x13e0 net/bridge/br_device.c:68 net/bridge/br_device.c:68
Read of size 2 at addr ffff8880aed5eb8e by task swapper/1/0
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:77 [inline]
__dump_stack lib/dump_stack.c:77 [inline] lib/dump_stack.c:118
<IRQ>
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 lib/dump_stack.c:118
print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 mm/kasan/report.c:256
kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 mm/kasan/report.c:354
kasan_report mm/kasan/report.c:412 [inline]
kasan_report mm/kasan/report.c:412 [inline] mm/kasan/report.c:443
__asan_report_load_n_noabort+0x8b/0xa0 mm/kasan/report.c:443 mm/kasan/report.c:443
br_dev_xmit+0x12b3/0x13e0 net/bridge/br_device.c:68 net/bridge/br_device.c:68
__netdev_start_xmit include/linux/netdevice.h:4349 [inline]
netdev_start_xmit include/linux/netdevice.h:4363 [inline]
xmit_one net/core/dev.c:3256 [inline]
__netdev_start_xmit include/linux/netdevice.h:4349 [inline] net/core/dev.c:3272
netdev_start_xmit include/linux/netdevice.h:4363 [inline]
xmit_one net/core/dev.c:3256 [inline]
netdev_start_xmit include/linux/netdevice.h:4363 [inline] net/core/dev.c:3272
xmit_one net/core/dev.c:3256 [inline] net/core/dev.c:3272
dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272 net/core/dev.c:3272
__dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838 net/core/dev.c:3838
vlan_dev_hard_start_xmit+0x38f/0x800 net/8021q/vlan_dev.c:131 net/8021q/vlan_dev.c:131
__netdev_start_xmit include/linux/netdevice.h:4349 [inline]
netdev_start_xmit include/linux/netdevice.h:4363 [inline]
xmit_one net/core/dev.c:3256 [inline]
__netdev_start_xmit include/linux/netdevice.h:4349 [inline] net/core/dev.c:3272
netdev_start_xmit include/linux/netdevice.h:4363 [inline]
xmit_one net/core/dev.c:3256 [inline]
netdev_start_xmit include/linux/netdevice.h:4363 [inline] net/core/dev.c:3272
xmit_one net/core/dev.c:3256 [inline] net/core/dev.c:3272
dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272 net/core/dev.c:3272
__dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838 net/core/dev.c:3838
neigh_connected_output+0x3e8/0x5e0 net/core/neighbour.c:1403 net/core/neighbour.c:1403
neigh_output include/net/neighbour.h:501 [inline]
neigh_output include/net/neighbour.h:501 [inline] net/ipv6/ip6_output.c:120
ip6_finish_output2+0x113d/0x2290 net/ipv6/ip6_output.c:120 net/ipv6/ip6_output.c:120
ip6_finish_output+0x89b/0x10f0 net/ipv6/ip6_output.c:192 net/ipv6/ip6_output.c:192
NF_HOOK_COND include/linux/netfilter.h:278 [inline]
NF_HOOK_COND include/linux/netfilter.h:278 [inline] net/ipv6/ip6_output.c:209
ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209 net/ipv6/ip6_output.c:209
dst_output include/net/dst.h:455 [inline]
NF_HOOK include/linux/netfilter.h:289 [inline]
dst_output include/net/dst.h:455 [inline] net/ipv6/mcast.c:1681
NF_HOOK include/linux/netfilter.h:289 [inline]
NF_HOOK include/linux/netfilter.h:289 [inline] net/ipv6/mcast.c:1681
mld_sendpack+0x674/0x1060 net/ipv6/mcast.c:1681 net/ipv6/mcast.c:1681
mld_send_cr net/ipv6/mcast.c:1977 [inline]
mld_send_cr net/ipv6/mcast.c:1977 [inline] net/ipv6/mcast.c:2476
mld_ifc_timer_expire+0x616/0xdf0 net/ipv6/mcast.c:2476 net/ipv6/mcast.c:2476
call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 kernel/time/timer.c:1338
expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 kernel/time/timer.c:1375
__run_timers kernel/time/timer.c:1696 [inline]
__run_timers kernel/time/timer.c:1696 [inline] kernel/time/timer.c:1709
run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 kernel/time/timer.c:1709
__do_softirq+0x265/0x980 kernel/softirq.c:292 kernel/softirq.c:292
invoke_softirq kernel/softirq.c:372 [inline]
invoke_softirq kernel/softirq.c:372 [inline] kernel/softirq.c:412
irq_exit+0x215/0x260 kernel/softirq.c:412 kernel/softirq.c:412
exiting_irq arch/x86/include/asm/apic.h:536 [inline]
exiting_irq arch/x86/include/asm/apic.h:536 [inline] arch/x86/kernel/apic/apic.c:1098
smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 arch/x86/kernel/apic/apic.c:1098
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 arch/x86/entry/entry_64.S:894
</IRQ>
RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61 arch/x86/include/asm/irqflags.h:61
Code: 48 89 df e8 f4 20 7f f9 e9 2e ff ff ff 48 89 df e8 e7 20 7f f9 eb 82 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 14 43 4e 00 fb f4 <c3> 90 e9 07 00 00 00 0f 00 2d 04 43 4e 00 f4 c3 90 90 41 56 41 55
RSP: 0018:ffff8880b5a9fd40 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff13e3054 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880b5a86c44
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89f18290
R13: 1ffff11016b53fb2 R14: 0000000000000000 R15: 0000000000000000
arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline]
arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] arch/x86/kernel/process.c:557
default_idle+0x49/0x310 arch/x86/kernel/process.c:557 arch/x86/kernel/process.c:557
cpuidle_idle_call kernel/sched/idle.c:153 [inline]
cpuidle_idle_call kernel/sched/idle.c:153 [inline] kernel/sched/idle.c:263
do_idle+0x2ec/0x4b0 kernel/sched/idle.c:263 kernel/sched/idle.c:263
cpu_startup_entry+0xc5/0xe0 kernel/sched/idle.c:369 kernel/sched/idle.c:369
start_secondary+0x435/0x5c0 arch/x86/kernel/smpboot.c:271 arch/x86/kernel/smpboot.c:271
secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 arch/x86/kernel/head_64.S:243
Allocated by task 0:
__do_kmalloc_node mm/slab.c:3689 [inline]
__do_kmalloc_node mm/slab.c:3689 [inline] mm/slab.c:3703
__kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3703 mm/slab.c:3703
__kmalloc_reserve net/core/skbuff.c:137 [inline]
__kmalloc_reserve net/core/skbuff.c:137 [inline] net/core/skbuff.c:205
__alloc_skb+0xae/0x560 net/core/skbuff.c:205 net/core/skbuff.c:205
alloc_skb include/linux/skbuff.h:995 [inline]
alloc_skb include/linux/skbuff.h:995 [inline] net/core/skbuff.c:5333
alloc_skb_with_frags+0x92/0x570 net/core/skbuff.c:5333 net/core/skbuff.c:5333
sock_alloc_send_pskb+0x6e1/0x830 net/core/sock.c:2108 net/core/sock.c:2108
mld_newpack+0x1d2/0x760 net/ipv6/mcast.c:1609 net/ipv6/mcast.c:1609
add_grhead+0x265/0x330 net/ipv6/mcast.c:1712 net/ipv6/mcast.c:1712
add_grec+0xe3c/0x10b0 net/ipv6/mcast.c:1843 net/ipv6/mcast.c:1843
mld_send_cr net/ipv6/mcast.c:1969 [inline]
mld_send_cr net/ipv6/mcast.c:1969 [inline] net/ipv6/mcast.c:2476
mld_ifc_timer_expire+0x5a2/0xdf0 net/ipv6/mcast.c:2476 net/ipv6/mcast.c:2476
call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 kernel/time/timer.c:1338
expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 kernel/time/timer.c:1375
__run_timers kernel/time/timer.c:1696 [inline]
__run_timers kernel/time/timer.c:1696 [inline] kernel/time/timer.c:1709
run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 kernel/time/timer.c:1709
__do_softirq+0x265/0x980 kernel/softirq.c:292 kernel/softirq.c:292
Freed by task 0:
__cache_free mm/slab.c:3503 [inline]
__cache_free mm/slab.c:3503 [inline] mm/slab.c:3822
kfree+0xcc/0x210 mm/slab.c:3822 mm/slab.c:3822
skb_free_head net/core/skbuff.c:563 [inline]
skb_free_head net/core/skbuff.c:563 [inline] net/core/skbuff.c:1506
pskb_expand_head+0x327/0xf20 net/core/skbuff.c:1506 net/core/skbuff.c:1506
__skb_cow include/linux/skbuff.h:2977 [inline]
skb_cow_head include/linux/skbuff.h:3011 [inline]
__vlan_insert_inner_tag include/linux/if_vlan.h:346 [inline]
vlan_insert_inner_tag include/linux/if_vlan.h:416 [inline]
vlan_insert_tag include/linux/if_vlan.h:441 [inline]
vlan_insert_tag_set_proto include/linux/if_vlan.h:460 [inline]
__allowed_ingress net/bridge/br_vlan.c:437 [inline]
__skb_cow include/linux/skbuff.h:2977 [inline] net/bridge/br_vlan.c:514
skb_cow_head include/linux/skbuff.h:3011 [inline]
__vlan_insert_inner_tag include/linux/if_vlan.h:346 [inline]
vlan_insert_inner_tag include/linux/if_vlan.h:416 [inline]
vlan_insert_tag include/linux/if_vlan.h:441 [inline]
vlan_insert_tag_set_proto include/linux/if_vlan.h:460 [inline]
__allowed_ingress net/bridge/br_vlan.c:437 [inline]
skb_cow_head include/linux/skbuff.h:3011 [inline] net/bridge/br_vlan.c:514
__vlan_insert_inner_tag include/linux/if_vlan.h:346 [inline] net/bridge/br_vlan.c:514
vlan_insert_inner_tag include/linux/if_vlan.h:416 [inline] net/bridge/br_vlan.c:514
vlan_insert_tag include/linux/if_vlan.h:441 [inline] net/bridge/br_vlan.c:514
vlan_insert_tag_set_proto include/linux/if_vlan.h:460 [inline] net/bridge/br_vlan.c:514
__allowed_ingress net/bridge/br_vlan.c:437 [inline] net/bridge/br_vlan.c:514
br_allowed_ingress+0x376/0xed0 net/bridge/br_vlan.c:514 net/bridge/br_vlan.c:514
br_dev_xmit+0x3e5/0x13e0 net/bridge/br_device.c:64 net/bridge/br_device.c:64
__netdev_start_xmit include/linux/netdevice.h:4349 [inline]
netdev_start_xmit include/linux/netdevice.h:4363 [inline]
xmit_one net/core/dev.c:3256 [inline]
__netdev_start_xmit include/linux/netdevice.h:4349 [inline] net/core/dev.c:3272
netdev_start_xmit include/linux/netdevice.h:4363 [inline]
xmit_one net/core/dev.c:3256 [inline]
netdev_start_xmit include/linux/netdevice.h:4363 [inline] net/core/dev.c:3272
xmit_one net/core/dev.c:3256 [inline] net/core/dev.c:3272
dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272 net/core/dev.c:3272
__dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838 net/core/dev.c:3838
vlan_dev_hard_start_xmit+0x38f/0x800 net/8021q/vlan_dev.c:131 net/8021q/vlan_dev.c:131
__netdev_start_xmit include/linux/netdevice.h:4349 [inline]
netdev_start_xmit include/linux/netdevice.h:4363 [inline]
xmit_one net/core/dev.c:3256 [inline]
__netdev_start_xmit include/linux/netdevice.h:4349 [inline] net/core/dev.c:3272
netdev_start_xmit include/linux/netdevice.h:4363 [inline]
xmit_one net/core/dev.c:3256 [inline]
netdev_start_xmit include/linux/netdevice.h:4363 [inline] net/core/dev.c:3272
xmit_one net/core/dev.c:3256 [inline] net/core/dev.c:3272
dev_hard_start_xmit+0x1a8/0x920 net/core/dev.c:3272 net/core/dev.c:3272
__dev_queue_xmit+0x269d/0x2e00 net/core/dev.c:3838 net/core/dev.c:3838
neigh_connected_output+0x3e8/0x5e0 net/core/neighbour.c:1403 net/core/neighbour.c:1403
neigh_output include/net/neighbour.h:501 [inline]
neigh_output include/net/neighbour.h:501 [inline] net/ipv6/ip6_output.c:120
ip6_finish_output2+0x113d/0x2290 net/ipv6/ip6_output.c:120 net/ipv6/ip6_output.c:120
ip6_finish_output+0x89b/0x10f0 net/ipv6/ip6_output.c:192 net/ipv6/ip6_output.c:192
NF_HOOK_COND include/linux/netfilter.h:278 [inline]
NF_HOOK_COND include/linux/netfilter.h:278 [inline] net/ipv6/ip6_output.c:209
ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209 net/ipv6/ip6_output.c:209
dst_output include/net/dst.h:455 [inline]
NF_HOOK include/linux/netfilter.h:289 [inline]
dst_output include/net/dst.h:455 [inline] net/ipv6/mcast.c:1681
NF_HOOK include/linux/netfilter.h:289 [inline]
NF_HOOK include/linux/netfilter.h:289 [inline] net/ipv6/mcast.c:1681
mld_sendpack+0x674/0x1060 net/ipv6/mcast.c:1681 net/ipv6/mcast.c:1681
mld_send_cr net/ipv6/mcast.c:1977 [inline]
mld_send_cr net/ipv6/mcast.c:1977 [inline] net/ipv6/mcast.c:2476
mld_ifc_timer_expire+0x616/0xdf0 net/ipv6/mcast.c:2476 net/ipv6/mcast.c:2476
call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 kernel/time/timer.c:1338
expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 kernel/time/timer.c:1375
__run_timers kernel/time/timer.c:1696 [inline]
__run_timers kernel/time/timer.c:1696 [inline] kernel/time/timer.c:1709
run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 kernel/time/timer.c:1709
__do_softirq+0x265/0x980 kernel/softirq.c:292 kernel/softirq.c:292
The buggy address belongs to the object at ffff8880aed5eb80
which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 14 bytes inside of
2048-byte region [ffff8880aed5eb80, ffff8880aed5f380)
The buggy address is located 14 bytes inside of
The buggy address belongs to the page:
page:ffffea0002bb5780 count:1 mapcount:0 mapping:ffff88813bff0c40 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffffea000254b008 ffff88813bff1948 ffff88813bff0c40
raw: 0000000000000000 ffff8880aed5e300 0000000100000003 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8880aed5ea80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
Memory state around the buggy address:
ffff8880aed5eb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880aed5eb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880aed5ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880aed5ec80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 48 89 df mov %rbx,%rdi
----------------
Code disassembly (best guess):
3: e8 f4 20 7f f9 callq 0xf97f20fc
8: e9 2e ff ff ff jmpq 0xffffff3b
d: 48 89 df mov %rbx,%rdi
10: e8 e7 20 7f f9 callq 0xf97f20fc
15: eb 82 jmp 0xffffff99
17: 90 nop
18: 90 nop
19: 90 nop
1a: 90 nop
1b: 90 nop
1c: e9 07 00 00 00 jmpq 0x28
21: 0f 00 2d 14 43 4e 00 verw 0x4e4314(%rip) # 0x4e433c
28: fb sti
29: f4 hlt
* 2a: c3 retq <-- trapping instruction
2b: 90 nop
2c: e9 07 00 00 00 jmpq 0x38
31: 0f 00 2d 04 43 4e 00 verw 0x4e4304(%rip) # 0x4e433c
38: f4 hlt
39: c3 retq
3a: 90 nop
3b: 90 nop
3c: 41 56 push %r14
3e: 41 55 push %r13
----------------
Code disassembly (best guess):
0: 48 89 df mov %rbx,%rdi
Code disassembly (best guess):
3: e8 f4 20 7f f9 callq 0xf97f20fc
8: e9 2e ff ff ff jmpq 0xffffff3b
d: 48 89 df mov %rbx,%rdi
10: e8 e7 20 7f f9 callq 0xf97f20fc
15: eb 82 jmp 0xffffff99
17: 90 nop
18: 90 nop
19: 90 nop
1a: 90 nop
1b: 90 nop
1c: e9 07 00 00 00 jmpq 0x28
21: 0f 00 2d 14 43 4e 00 verw 0x4e4314(%rip) # 0x4e433c
28: fb sti
29: f4 hlt
* 2a: c3 retq <-- trapping instruction
2b: 90 nop
2c: e9 07 00 00 00 jmpq 0x38
31: 0f 00 2d 04 43 4e 00 verw 0x4e4304(%rip) # 0x4e433c
38: f4 hlt
39: c3 retq
3a: 90 nop
3b: 90 nop
3c: 41 56 push %r14
3e: 41 55 push %r13
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