KASAN: use-after-free Read in __netif_receive_skb_core
10 views
Skip to first unread message
syzbot
May 16, 2020, 3:24:16 PM5/16/20
to syzkaller...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: ab9dfda2 Linux 4.14.180
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=173a8a22100000
kernel config: https://syzkaller.appspot.com/x/.config?x=221566a7407ce2de
dashboard link: https://syzkaller.appspot.com/bug?extid=48686a94cbaf2d9dd5fb
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+48686a...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:183 [inline]
BUG: KASAN: use-after-free in deliver_ptype_list_skb net/core/dev.c:1892 [inline]
BUG: KASAN: use-after-free in __netif_receive_skb_core+0x24bf/0x2c00 net/core/dev.c:4466
Read of size 8 at addr ffff888055b530a8 by task syz-executor.5/26763
CPU: 0 PID: 26763 Comm: syz-executor.5 Not tainted 4.14.180-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:17 [inline]
dump_stack+0x13e/0x194 lib/dump_stack.c:58
print_address_description.cold+0x7c/0x1e2 mm/kasan/report.c:252
kasan_report_error mm/kasan/report.c:351 [inline]
kasan_report mm/kasan/report.c:409 [inline]
kasan_report.cold+0xa9/0x2ae mm/kasan/report.c:393
__read_once_size include/linux/compiler.h:183 [inline]
deliver_ptype_list_skb net/core/dev.c:1892 [inline]
__netif_receive_skb_core+0x24bf/0x2c00 net/core/dev.c:4466
__netif_receive_skb+0x27/0x1a0 net/core/dev.c:4516
process_backlog+0x214/0x750 net/core/dev.c:5198
napi_poll net/core/dev.c:5599 [inline]
net_rx_action+0x456/0xe90 net/core/dev.c:5665
__do_softirq+0x254/0x9bf kernel/softirq.c:288
invoke_softirq kernel/softirq.c:368 [inline]
irq_exit+0x15b/0x1a0 kernel/softirq.c:409
exiting_irq arch/x86/include/asm/apic.h:648 [inline]
smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102
apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
</IRQ>
RIP: 0010:rcu_gp_kthread_wake+0x0/0xc0 kernel/rcu/tree.c:1807
RSP: 0018:ffff888046e5f550 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10
RAX: 0000000080000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000004 RSI: ffff88804f6b49f0 RDI: ffffffff87d86640
RBP: ffffffff87d86640 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88804f6b44d8 R14: 0000000000000000 R15: ffffffff87d866e8
rcu_read_unlock_special+0x888/0xcf0 kernel/rcu/tree_plugin.h:526
__rcu_read_unlock+0x158/0x160 kernel/rcu/update.c:260
rcu_read_unlock include/linux/rcupdate.h:684 [inline]
ip_queue_xmit+0x7c8/0x1b20 net/ipv4/ip_output.c:505
__tcp_transmit_skb+0x1654/0x2dd0 net/ipv4/tcp_output.c:1131
tcp_transmit_skb net/ipv4/tcp_output.c:1147 [inline]
tcp_write_xmit+0x56a/0x4a60 net/ipv4/tcp_output.c:2391
__tcp_push_pending_frames+0x9c/0x240 net/ipv4/tcp_output.c:2572
tcp_push_pending_frames include/net/tcp.h:1778 [inline]
tcp_data_snd_check net/ipv4/tcp_input.c:5123 [inline]
tcp_rcv_established+0x612/0x15d0 net/ipv4/tcp_input.c:5570
tcp_v4_do_rcv+0x55d/0x7e0 net/ipv4/tcp_ipv4.c:1467
sk_backlog_rcv include/net/sock.h:917 [inline]
__release_sock+0x12a/0x350 net/core/sock.c:2267
release_sock+0x54/0x1b0 net/core/sock.c:2782
sk_stream_wait_memory+0x492/0xbf0 net/core/stream.c:145
tcp_sendmsg_locked+0x1168/0x2fd0 net/ipv4/tcp.c:1416
tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1457
inet_sendmsg+0x116/0x4d0 net/ipv4/af_inet.c:762
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xc5/0x100 net/socket.c:656
SYSC_sendto+0x1c4/0x2b0 net/socket.c:1763
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45ca29
RSP: 002b:00007f7a959efc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00000000005011c0 RCX: 000000000045ca29
RDX: 000000000000fe6a RSI: 00000000200012c0 RDI: 0000000000000004
RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000027
R10: 000000000020c49a R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000a0e R14: 00000000004cce56 R15: 00007f7a959f06d4
Allocated by task 26770:
save_stack+0x32/0xa0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc mm/kasan/kasan.c:551 [inline]
kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:529
__do_kmalloc mm/slab.c:3720 [inline]
__kmalloc+0x15b/0x7c0 mm/slab.c:3729
kmalloc include/linux/slab.h:493 [inline]
sk_prot_alloc+0x164/0x290 net/core/sock.c:1467
sk_alloc+0x36/0xd60 net/core/sock.c:1521
packet_create+0xf5/0x7e0 net/packet/af_packet.c:3283
__sock_create+0x2f2/0x620 net/socket.c:1275
sock_create net/socket.c:1315 [inline]
SYSC_socket net/socket.c:1345 [inline]
SyS_socket+0xd2/0x170 net/socket.c:1325
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
Freed by task 26718:
save_stack+0x32/0xa0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_slab_free+0x75/0xc0 mm/kasan/kasan.c:524
__cache_free mm/slab.c:3496 [inline]
kfree+0xcb/0x260 mm/slab.c:3815
sk_prot_free net/core/sock.c:1504 [inline]
__sk_destruct+0x4f6/0x640 net/core/sock.c:1581
sk_destruct+0x97/0xc0 net/core/sock.c:1596
__sk_free+0x4c/0x220 net/core/sock.c:1604
sk_free+0x2b/0x40 net/core/sock.c:1615
sock_put include/net/sock.h:1658 [inline]
packet_release+0x8c4/0xb70 net/packet/af_packet.c:3112
__sock_release+0xcd/0x2b0 net/socket.c:602
sock_close+0x15/0x20 net/socket.c:1139
__fput+0x25f/0x790 fs/file_table.c:210
task_work_run+0x113/0x190 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:191 [inline]
exit_to_usermode_loop+0x1d6/0x220 arch/x86/entry/common.c:164
prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
entry_SYSCALL_64_after_hwframe+0x42/0xb7
The buggy address belongs to the object at ffff888055b528c0
which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 2024 bytes inside of
2048-byte region [ffff888055b528c0, ffff888055b530c0)
The buggy address belongs to the page:
page:ffffea000156d480 count:1 mapcount:0 mapping:ffff888055b52040 index:0x0 compound_mapcount: 0
flags: 0xfffe0000008100(slab|head)
raw: 00fffe0000008100 ffff888055b52040 0000000000000000 0000000100000003
raw: ffffea0002938ea0 ffffea00013d57a0 ffff88812fe54c40 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888055b52f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888055b53000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888055b53080: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
^
ffff888055b53100: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
ffff888055b53180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
---
This bug 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 bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following crash on:
HEAD commit: ab9dfda2 Linux 4.14.180
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=173a8a22100000
kernel config: https://syzkaller.appspot.com/x/.config?x=221566a7407ce2de
dashboard link: https://syzkaller.appspot.com/bug?extid=48686a94cbaf2d9dd5fb
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+48686a...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:183 [inline]
BUG: KASAN: use-after-free in deliver_ptype_list_skb net/core/dev.c:1892 [inline]
BUG: KASAN: use-after-free in __netif_receive_skb_core+0x24bf/0x2c00 net/core/dev.c:4466
Read of size 8 at addr ffff888055b530a8 by task syz-executor.5/26763
CPU: 0 PID: 26763 Comm: syz-executor.5 Not tainted 4.14.180-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:17 [inline]
dump_stack+0x13e/0x194 lib/dump_stack.c:58
print_address_description.cold+0x7c/0x1e2 mm/kasan/report.c:252
kasan_report_error mm/kasan/report.c:351 [inline]
kasan_report mm/kasan/report.c:409 [inline]
kasan_report.cold+0xa9/0x2ae mm/kasan/report.c:393
__read_once_size include/linux/compiler.h:183 [inline]
deliver_ptype_list_skb net/core/dev.c:1892 [inline]
__netif_receive_skb_core+0x24bf/0x2c00 net/core/dev.c:4466
__netif_receive_skb+0x27/0x1a0 net/core/dev.c:4516
process_backlog+0x214/0x750 net/core/dev.c:5198
napi_poll net/core/dev.c:5599 [inline]
net_rx_action+0x456/0xe90 net/core/dev.c:5665
__do_softirq+0x254/0x9bf kernel/softirq.c:288
invoke_softirq kernel/softirq.c:368 [inline]
irq_exit+0x15b/0x1a0 kernel/softirq.c:409
exiting_irq arch/x86/include/asm/apic.h:648 [inline]
smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102
apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
</IRQ>
RIP: 0010:rcu_gp_kthread_wake+0x0/0xc0 kernel/rcu/tree.c:1807
RSP: 0018:ffff888046e5f550 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10
RAX: 0000000080000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000004 RSI: ffff88804f6b49f0 RDI: ffffffff87d86640
RBP: ffffffff87d86640 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88804f6b44d8 R14: 0000000000000000 R15: ffffffff87d866e8
rcu_read_unlock_special+0x888/0xcf0 kernel/rcu/tree_plugin.h:526
__rcu_read_unlock+0x158/0x160 kernel/rcu/update.c:260
rcu_read_unlock include/linux/rcupdate.h:684 [inline]
ip_queue_xmit+0x7c8/0x1b20 net/ipv4/ip_output.c:505
__tcp_transmit_skb+0x1654/0x2dd0 net/ipv4/tcp_output.c:1131
tcp_transmit_skb net/ipv4/tcp_output.c:1147 [inline]
tcp_write_xmit+0x56a/0x4a60 net/ipv4/tcp_output.c:2391
__tcp_push_pending_frames+0x9c/0x240 net/ipv4/tcp_output.c:2572
tcp_push_pending_frames include/net/tcp.h:1778 [inline]
tcp_data_snd_check net/ipv4/tcp_input.c:5123 [inline]
tcp_rcv_established+0x612/0x15d0 net/ipv4/tcp_input.c:5570
tcp_v4_do_rcv+0x55d/0x7e0 net/ipv4/tcp_ipv4.c:1467
sk_backlog_rcv include/net/sock.h:917 [inline]
__release_sock+0x12a/0x350 net/core/sock.c:2267
release_sock+0x54/0x1b0 net/core/sock.c:2782
sk_stream_wait_memory+0x492/0xbf0 net/core/stream.c:145
tcp_sendmsg_locked+0x1168/0x2fd0 net/ipv4/tcp.c:1416
tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1457
inet_sendmsg+0x116/0x4d0 net/ipv4/af_inet.c:762
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xc5/0x100 net/socket.c:656
SYSC_sendto+0x1c4/0x2b0 net/socket.c:1763
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45ca29
RSP: 002b:00007f7a959efc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00000000005011c0 RCX: 000000000045ca29
RDX: 000000000000fe6a RSI: 00000000200012c0 RDI: 0000000000000004
RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000027
R10: 000000000020c49a R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000a0e R14: 00000000004cce56 R15: 00007f7a959f06d4
Allocated by task 26770:
save_stack+0x32/0xa0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc mm/kasan/kasan.c:551 [inline]
kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:529
__do_kmalloc mm/slab.c:3720 [inline]
__kmalloc+0x15b/0x7c0 mm/slab.c:3729
kmalloc include/linux/slab.h:493 [inline]
sk_prot_alloc+0x164/0x290 net/core/sock.c:1467
sk_alloc+0x36/0xd60 net/core/sock.c:1521
packet_create+0xf5/0x7e0 net/packet/af_packet.c:3283
__sock_create+0x2f2/0x620 net/socket.c:1275
sock_create net/socket.c:1315 [inline]
SYSC_socket net/socket.c:1345 [inline]
SyS_socket+0xd2/0x170 net/socket.c:1325
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
Freed by task 26718:
save_stack+0x32/0xa0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_slab_free+0x75/0xc0 mm/kasan/kasan.c:524
__cache_free mm/slab.c:3496 [inline]
kfree+0xcb/0x260 mm/slab.c:3815
sk_prot_free net/core/sock.c:1504 [inline]
__sk_destruct+0x4f6/0x640 net/core/sock.c:1581
sk_destruct+0x97/0xc0 net/core/sock.c:1596
__sk_free+0x4c/0x220 net/core/sock.c:1604
sk_free+0x2b/0x40 net/core/sock.c:1615
sock_put include/net/sock.h:1658 [inline]
packet_release+0x8c4/0xb70 net/packet/af_packet.c:3112
__sock_release+0xcd/0x2b0 net/socket.c:602
sock_close+0x15/0x20 net/socket.c:1139
__fput+0x25f/0x790 fs/file_table.c:210
task_work_run+0x113/0x190 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:191 [inline]
exit_to_usermode_loop+0x1d6/0x220 arch/x86/entry/common.c:164
prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
entry_SYSCALL_64_after_hwframe+0x42/0xb7
The buggy address belongs to the object at ffff888055b528c0
which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 2024 bytes inside of
2048-byte region [ffff888055b528c0, ffff888055b530c0)
The buggy address belongs to the page:
page:ffffea000156d480 count:1 mapcount:0 mapping:ffff888055b52040 index:0x0 compound_mapcount: 0
flags: 0xfffe0000008100(slab|head)
raw: 00fffe0000008100 ffff888055b52040 0000000000000000 0000000100000003
raw: ffffea0002938ea0 ffffea00013d57a0 ffff88812fe54c40 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888055b52f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888055b53000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888055b53080: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
^
ffff888055b53100: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
ffff888055b53180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
---
This bug 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 bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot
Sep 22, 2020, 11:30:19 AM9/22/20
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: cbfa1702 Linux 4.14.198
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=122362c3900000
kernel config: https://syzkaller.appspot.com/x/.config?x=3990958d85b55e59
dashboard link: https://syzkaller.appspot.com/bug?extid=48686a94cbaf2d9dd5fb
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1589e6c5900000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
BUG: KASAN: use-after-free in __netif_receive_skb_core+0x23e1/0x2a30 net/core/dev.c:4462
Read of size 8 at addr ffff8880950d5468 by task syz-executor.4/19060
CPU: 0 PID: 19060 Comm: syz-executor.4 Not tainted 4.14.198-syzkaller #0
print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
kasan_report_error.cold+0x8a/0x194 mm/kasan/report.c:351
kasan_report mm/kasan/report.c:409 [inline]
__asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430
__read_once_size include/linux/compiler.h:183 [inline]
deliver_ptype_list_skb net/core/dev.c:1888 [inline]
__netif_receive_skb_core+0x23e1/0x2a30 net/core/dev.c:4462
__netif_receive_skb+0x27/0x1a0 net/core/dev.c:4512
process_backlog+0x210/0x6f0 net/core/dev.c:5194
napi_poll net/core/dev.c:5596 [inline]
net_rx_action+0x466/0xfd0 net/core/dev.c:5662
__do_softirq+0x254/0xa1d kernel/softirq.c:288
invoke_softirq kernel/softirq.c:368 [inline]
irq_exit+0x193/0x240 kernel/softirq.c:409
</IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline]
RIP: 0010:rcu_read_unlock_special+0x452/0xdd0 kernel/rcu/tree_plugin.h:542
RSP: 0018:ffff88808a2a77b8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff0fa2d21 RBX: ffff88809b54c5c0 RCX: 1ffff110136a99cd
RDX: dffffc0000000000 RSI: ffff88809b54ce70 RDI: 0000000000000286
RBP: ffff88809b54c944 R08: ffff8880aeb2beb0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000286
R13: ffff88809b54c946 R14: ffff88809b54c945 R15: 0000000000000000
__tcp_transmit_skb+0x17e2/0x2cb0 net/ipv4/tcp_output.c:1133
tcp_transmit_skb net/ipv4/tcp_output.c:1149 [inline]
tcp_write_xmit+0x69d/0x4e10 net/ipv4/tcp_output.c:2393
__tcp_push_pending_frames+0xa0/0x230 net/ipv4/tcp_output.c:2577
tcp_sendmsg_locked+0x23ca/0x2ef0 net/ipv4/tcp.c:1404
tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1457
inet_sendmsg+0x11a/0x4e0 net/ipv4/af_inet.c:762
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
SYSC_sendto net/socket.c:1763 [inline]
SyS_sendto+0x1c7/0x2c0 net/socket.c:1731
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45e179
RSP: 002b:00007f3bd234cc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 000000000002d200 RCX: 000000000045e179
R10: 000000000020c49a R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffd9b8a05ff R14: 00007f3bd234d9c0 R15: 000000000118cf4c
Allocated by task 19064:
save_stack mm/kasan/kasan.c:447 [inline]
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
__do_kmalloc mm/slab.c:3720 [inline]
__kmalloc+0x15a/0x400 mm/slab.c:3729
kmalloc include/linux/slab.h:493 [inline]
sk_prot_alloc+0x1ba/0x290 net/core/sock.c:1467
sk_alloc+0x36/0xcd0 net/core/sock.c:1521
packet_create+0xf5/0x7f0 net/packet/af_packet.c:3288
__sock_create+0x303/0x620 net/socket.c:1275
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
Freed by task 19037:
save_stack mm/kasan/kasan.c:447 [inline]
set_track mm/kasan/kasan.c:459 [inline]
kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524
__cache_free mm/slab.c:3496 [inline]
kfree+0xc9/0x250 mm/slab.c:3815
sk_prot_free net/core/sock.c:1504 [inline]
__sk_destruct+0x577/0x6e0 net/core/sock.c:1582
sk_destruct net/core/sock.c:1597 [inline]
__sk_free+0xd9/0x2d0 net/core/sock.c:1605
sk_free+0x2b/0x40 net/core/sock.c:1616
sock_put include/net/sock.h:1662 [inline]
packet_release+0x837/0xa80 net/packet/af_packet.c:3117
task_work_run+0x11f/0x190 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:191 [inline]
exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
The buggy address belongs to the object at ffff8880950d4c80
flags: 0xfffe0000008100(slab|head)
raw: 00fffe0000008100 ffff8880950d4400 ffff8880950d5500 0000000100000002
raw: ffffea0002a429a0 ffffea0002497620 ffff88812fe50c40 0000000000000000
ffff8880950d5380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880950d5400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880950d5480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880950d5500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
HEAD commit: cbfa1702 Linux 4.14.198
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=122362c3900000
kernel config: https://syzkaller.appspot.com/x/.config?x=3990958d85b55e59
dashboard link: https://syzkaller.appspot.com/bug?extid=48686a94cbaf2d9dd5fb
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1589e6c5900000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+48686a...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:183 [inline]
BUG: KASAN: use-after-free in deliver_ptype_list_skb net/core/dev.c:1888 [inline]
==================================================================
BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:183 [inline]
BUG: KASAN: use-after-free in __netif_receive_skb_core+0x23e1/0x2a30 net/core/dev.c:4462
Read of size 8 at addr ffff8880950d5468 by task syz-executor.4/19060
CPU: 0 PID: 19060 Comm: syz-executor.4 Not tainted 4.14.198-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:17 [inline]
dump_stack+0x1b2/0x283 lib/dump_stack.c:58
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:17 [inline]
print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
kasan_report_error.cold+0x8a/0x194 mm/kasan/report.c:351
kasan_report mm/kasan/report.c:409 [inline]
__asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430
__read_once_size include/linux/compiler.h:183 [inline]
deliver_ptype_list_skb net/core/dev.c:1888 [inline]
__netif_receive_skb_core+0x23e1/0x2a30 net/core/dev.c:4462
__netif_receive_skb+0x27/0x1a0 net/core/dev.c:4512
process_backlog+0x210/0x6f0 net/core/dev.c:5194
napi_poll net/core/dev.c:5596 [inline]
net_rx_action+0x466/0xfd0 net/core/dev.c:5662
__do_softirq+0x254/0xa1d kernel/softirq.c:288
invoke_softirq kernel/softirq.c:368 [inline]
irq_exit+0x193/0x240 kernel/softirq.c:409
exiting_irq arch/x86/include/asm/apic.h:648 [inline]
smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102
apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793
smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102
</IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline]
RIP: 0010:rcu_read_unlock_special+0x452/0xdd0 kernel/rcu/tree_plugin.h:542
RSP: 0018:ffff88808a2a77b8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff0fa2d21 RBX: ffff88809b54c5c0 RCX: 1ffff110136a99cd
RDX: dffffc0000000000 RSI: ffff88809b54ce70 RDI: 0000000000000286
RBP: ffff88809b54c944 R08: ffff8880aeb2beb0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000286
R13: ffff88809b54c946 R14: ffff88809b54c945 R15: 0000000000000000
__rcu_read_unlock+0x158/0x160 kernel/rcu/update.c:260
rcu_read_unlock include/linux/rcupdate.h:684 [inline]
ip_queue_xmit+0x7e9/0x1a80 net/ipv4/ip_output.c:505
rcu_read_unlock include/linux/rcupdate.h:684 [inline]
__tcp_transmit_skb+0x17e2/0x2cb0 net/ipv4/tcp_output.c:1133
tcp_transmit_skb net/ipv4/tcp_output.c:1149 [inline]
tcp_write_xmit+0x69d/0x4e10 net/ipv4/tcp_output.c:2393
__tcp_push_pending_frames+0xa0/0x230 net/ipv4/tcp_output.c:2577
tcp_sendmsg_locked+0x23ca/0x2ef0 net/ipv4/tcp.c:1404
tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1457
inet_sendmsg+0x11a/0x4e0 net/ipv4/af_inet.c:762
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
SYSC_sendto net/socket.c:1763 [inline]
SyS_sendto+0x1c7/0x2c0 net/socket.c:1731
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45e179
RSP: 002b:00007f3bd234cc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 000000000002d200 RCX: 000000000045e179
RDX: 000000000000fe6a RSI: 00000000200012c0 RDI: 0000000000000004
RBP: 000000000118cf98 R08: 0000000000000000 R09: 0000000000000027
R10: 000000000020c49a R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffd9b8a05ff R14: 00007f3bd234d9c0 R15: 000000000118cf4c
Allocated by task 19064:
save_stack mm/kasan/kasan.c:447 [inline]
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
__do_kmalloc mm/slab.c:3720 [inline]
__kmalloc+0x15a/0x400 mm/slab.c:3729
kmalloc include/linux/slab.h:493 [inline]
sk_prot_alloc+0x1ba/0x290 net/core/sock.c:1467
sk_alloc+0x36/0xcd0 net/core/sock.c:1521
packet_create+0xf5/0x7f0 net/packet/af_packet.c:3288
__sock_create+0x303/0x620 net/socket.c:1275
sock_create net/socket.c:1315 [inline]
SYSC_socket net/socket.c:1345 [inline]
SyS_socket+0xd1/0x1b0 net/socket.c:1325
SYSC_socket net/socket.c:1345 [inline]
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
Freed by task 19037:
save_stack mm/kasan/kasan.c:447 [inline]
set_track mm/kasan/kasan.c:459 [inline]
kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524
__cache_free mm/slab.c:3496 [inline]
kfree+0xc9/0x250 mm/slab.c:3815
sk_prot_free net/core/sock.c:1504 [inline]
__sk_destruct+0x577/0x6e0 net/core/sock.c:1582
sk_destruct net/core/sock.c:1597 [inline]
__sk_free+0xd9/0x2d0 net/core/sock.c:1605
sk_free+0x2b/0x40 net/core/sock.c:1616
sock_put include/net/sock.h:1662 [inline]
packet_release+0x837/0xa80 net/packet/af_packet.c:3117
__sock_release+0xcd/0x2b0 net/socket.c:602
sock_close+0x15/0x20 net/socket.c:1139
__fput+0x25f/0x7a0 fs/file_table.c:210
sock_close+0x15/0x20 net/socket.c:1139
task_work_run+0x11f/0x190 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:191 [inline]
exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
entry_SYSCALL_64_after_hwframe+0x46/0xbb
syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
The buggy address belongs to the object at ffff8880950d4c80
which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 2024 bytes inside of
2048-byte region [ffff8880950d4c80, ffff8880950d5480)
The buggy address is located 2024 bytes inside of
The buggy address belongs to the page:
page:ffffea0002543500 count:1 mapcount:0 mapping:ffff8880950d4400 index:0xffff8880950d5500 compound_mapcount: 0
flags: 0xfffe0000008100(slab|head)
raw: 00fffe0000008100 ffff8880950d4400 ffff8880950d5500 0000000100000002
raw: ffffea0002a429a0 ffffea0002497620 ffff88812fe50c40 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8880950d5300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
Memory state around the buggy address:
ffff8880950d5380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880950d5400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880950d5480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880950d5500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
Reply all
Reply to author
Forward
0 new messages