KASAN: use-after-free Read in refcount_inc_not_zero_checked
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syzbot
Jan 2, 2019, 5:35:03 AM1/2/19
to da...@davemloft.net, linux...@vger.kernel.org, linux-...@vger.kernel.org, net...@vger.kernel.org, ra...@linux-mips.org, syzkall...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 6a1d293238c1 Add linux-next specific files for 20181224
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=100ff080c00000
kernel config: https://syzkaller.appspot.com/x/.config?x=af046212050aa3ac
dashboard link: https://syzkaller.appspot.com/bug?extid=defa700d16f1bd1b9a05
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+defa70...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in atomic_read
include/generated/atomic-instrumented.h:26 [inline]
BUG: KASAN: use-after-free in refcount_inc_not_zero_checked+0x90/0x2c0
lib/refcount.c:120
Read of size 4 at addr ffff8880576b03c0 by task syz-executor0/12972
CPU: 1 PID: 12972 Comm: syz-executor0 Not tainted 4.20.0-rc7-next-20181224
#1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1db/0x2d0 lib/dump_stack.c:113
print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187
kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317
check_memory_region_inline mm/kasan/generic.c:185 [inline]
check_memory_region+0x123/0x190 mm/kasan/generic.c:191
kasan_check_read+0x11/0x20 mm/kasan/common.c:100
atomic_read include/generated/atomic-instrumented.h:26 [inline]
refcount_inc_not_zero_checked+0x90/0x2c0 lib/refcount.c:120
refcount_inc_checked+0x17/0x70 lib/refcount.c:153
sock_hold include/net/sock.h:643 [inline]
nr_release+0x62/0x3c0 net/netrom/af_netrom.c:523
__sock_release+0xd3/0x250 net/socket.c:579
sock_close+0x1b/0x30 net/socket.c:1141
__fput+0x3cd/0xaa0 fs/file_table.c:279
____fput+0x16/0x20 fs/file_table.c:312
task_work_run+0x1f4/0x2b0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop+0x32a/0x3b0 arch/x86/entry/common.c:166
prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
do_syscall_64+0x696/0x800 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x411c91
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 94 19 00 00 c3 48
83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48
89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007fff4f364100 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411c91
RDX: 0000000000000000 RSI: 000000000000123b RDI: 0000000000000004
RBP: 0000000000000000 R08: 000000003436323b R09: 000000003436323f
R10: 00007fff4f364030 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 00000000000014d3 R15: 0000000000000000
Allocated by task 12976:
save_stack+0x45/0xd0 mm/kasan/common.c:73
set_track mm/kasan/common.c:85 [inline]
kasan_kmalloc mm/kasan/common.c:482 [inline]
kasan_kmalloc+0xcf/0xe0 mm/kasan/common.c:455
__do_kmalloc mm/slab.c:3709 [inline]
__kmalloc+0x15c/0x740 mm/slab.c:3718
kmalloc include/linux/slab.h:550 [inline]
sk_prot_alloc+0x19c/0x2e0 net/core/sock.c:1477
sk_alloc+0xd7/0x1690 net/core/sock.c:1531
nr_create+0xb9/0x5e0 net/netrom/af_netrom.c:436
__sock_create+0x532/0x930 net/socket.c:1277
sock_create net/socket.c:1317 [inline]
__sys_socket+0x106/0x260 net/socket.c:1347
__do_sys_socket net/socket.c:1356 [inline]
__se_sys_socket net/socket.c:1354 [inline]
__x64_sys_socket+0x73/0xb0 net/socket.c:1354
do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 12972:
save_stack+0x45/0xd0 mm/kasan/common.c:73
set_track mm/kasan/common.c:85 [inline]
__kasan_slab_free+0x102/0x150 mm/kasan/common.c:444
kasan_slab_free+0xe/0x10 mm/kasan/common.c:452
__cache_free mm/slab.c:3485 [inline]
kfree+0xcf/0x230 mm/slab.c:3804
sk_prot_free net/core/sock.c:1514 [inline]
__sk_destruct+0x76d/0xa60 net/core/sock.c:1596
sk_destruct+0x7b/0x90 net/core/sock.c:1604
__sk_free+0xce/0x300 net/core/sock.c:1615
sk_free+0x42/0x50 net/core/sock.c:1626
sock_put include/net/sock.h:1703 [inline]
nr_release+0x337/0x3c0 net/netrom/af_netrom.c:557
__sock_release+0xd3/0x250 net/socket.c:579
sock_close+0x1b/0x30 net/socket.c:1141
__fput+0x3cd/0xaa0 fs/file_table.c:279
____fput+0x16/0x20 fs/file_table.c:312
task_work_run+0x1f4/0x2b0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop+0x32a/0x3b0 arch/x86/entry/common.c:166
prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
do_syscall_64+0x696/0x800 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
The buggy address belongs to the object at ffff8880576b0340
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 128 bytes inside of
2048-byte region [ffff8880576b0340, ffff8880576b0b40)
The buggy address belongs to the page:
page:ffffea00015dac00 count:1 mapcount:0 mapping:ffff88812c3f0c40 index:0x0
compound_mapcount: 0
flags: 0x1fffc0000010200(slab|head)
raw: 01fffc0000010200 ffffea000237cc88 ffffea0002528808 ffff88812c3f0c40
raw: 0000000000000000 ffff8880576b0340 0000000100000003 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8880576b0280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880576b0300: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
> ffff8880576b0380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880576b0400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880576b0480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
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#bug-status-tracking for how to communicate with
syzbot.
syzbot found the following crash on:
HEAD commit: 6a1d293238c1 Add linux-next specific files for 20181224
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=100ff080c00000
kernel config: https://syzkaller.appspot.com/x/.config?x=af046212050aa3ac
dashboard link: https://syzkaller.appspot.com/bug?extid=defa700d16f1bd1b9a05
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+defa70...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in atomic_read
include/generated/atomic-instrumented.h:26 [inline]
BUG: KASAN: use-after-free in refcount_inc_not_zero_checked+0x90/0x2c0
lib/refcount.c:120
Read of size 4 at addr ffff8880576b03c0 by task syz-executor0/12972
CPU: 1 PID: 12972 Comm: syz-executor0 Not tainted 4.20.0-rc7-next-20181224
#1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1db/0x2d0 lib/dump_stack.c:113
print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187
kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317
check_memory_region_inline mm/kasan/generic.c:185 [inline]
check_memory_region+0x123/0x190 mm/kasan/generic.c:191
kasan_check_read+0x11/0x20 mm/kasan/common.c:100
atomic_read include/generated/atomic-instrumented.h:26 [inline]
refcount_inc_not_zero_checked+0x90/0x2c0 lib/refcount.c:120
refcount_inc_checked+0x17/0x70 lib/refcount.c:153
sock_hold include/net/sock.h:643 [inline]
nr_release+0x62/0x3c0 net/netrom/af_netrom.c:523
__sock_release+0xd3/0x250 net/socket.c:579
sock_close+0x1b/0x30 net/socket.c:1141
__fput+0x3cd/0xaa0 fs/file_table.c:279
____fput+0x16/0x20 fs/file_table.c:312
task_work_run+0x1f4/0x2b0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop+0x32a/0x3b0 arch/x86/entry/common.c:166
prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
do_syscall_64+0x696/0x800 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x411c91
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 94 19 00 00 c3 48
83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48
89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007fff4f364100 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411c91
RDX: 0000000000000000 RSI: 000000000000123b RDI: 0000000000000004
RBP: 0000000000000000 R08: 000000003436323b R09: 000000003436323f
R10: 00007fff4f364030 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 00000000000014d3 R15: 0000000000000000
Allocated by task 12976:
save_stack+0x45/0xd0 mm/kasan/common.c:73
set_track mm/kasan/common.c:85 [inline]
kasan_kmalloc mm/kasan/common.c:482 [inline]
kasan_kmalloc+0xcf/0xe0 mm/kasan/common.c:455
__do_kmalloc mm/slab.c:3709 [inline]
__kmalloc+0x15c/0x740 mm/slab.c:3718
kmalloc include/linux/slab.h:550 [inline]
sk_prot_alloc+0x19c/0x2e0 net/core/sock.c:1477
sk_alloc+0xd7/0x1690 net/core/sock.c:1531
nr_create+0xb9/0x5e0 net/netrom/af_netrom.c:436
__sock_create+0x532/0x930 net/socket.c:1277
sock_create net/socket.c:1317 [inline]
__sys_socket+0x106/0x260 net/socket.c:1347
__do_sys_socket net/socket.c:1356 [inline]
__se_sys_socket net/socket.c:1354 [inline]
__x64_sys_socket+0x73/0xb0 net/socket.c:1354
do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 12972:
save_stack+0x45/0xd0 mm/kasan/common.c:73
set_track mm/kasan/common.c:85 [inline]
__kasan_slab_free+0x102/0x150 mm/kasan/common.c:444
kasan_slab_free+0xe/0x10 mm/kasan/common.c:452
__cache_free mm/slab.c:3485 [inline]
kfree+0xcf/0x230 mm/slab.c:3804
sk_prot_free net/core/sock.c:1514 [inline]
__sk_destruct+0x76d/0xa60 net/core/sock.c:1596
sk_destruct+0x7b/0x90 net/core/sock.c:1604
__sk_free+0xce/0x300 net/core/sock.c:1615
sk_free+0x42/0x50 net/core/sock.c:1626
sock_put include/net/sock.h:1703 [inline]
nr_release+0x337/0x3c0 net/netrom/af_netrom.c:557
__sock_release+0xd3/0x250 net/socket.c:579
sock_close+0x1b/0x30 net/socket.c:1141
__fput+0x3cd/0xaa0 fs/file_table.c:279
____fput+0x16/0x20 fs/file_table.c:312
task_work_run+0x1f4/0x2b0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop+0x32a/0x3b0 arch/x86/entry/common.c:166
prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
do_syscall_64+0x696/0x800 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
The buggy address belongs to the object at ffff8880576b0340
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 128 bytes inside of
2048-byte region [ffff8880576b0340, ffff8880576b0b40)
The buggy address belongs to the page:
page:ffffea00015dac00 count:1 mapcount:0 mapping:ffff88812c3f0c40 index:0x0
compound_mapcount: 0
flags: 0x1fffc0000010200(slab|head)
raw: 01fffc0000010200 ffffea000237cc88 ffffea0002528808 ffff88812c3f0c40
raw: 0000000000000000 ffff8880576b0340 0000000100000003 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8880576b0280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880576b0300: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
> ffff8880576b0380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880576b0400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880576b0480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
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#bug-status-tracking for how to communicate with
syzbot.
syzbot
Jan 23, 2019, 3:45:04 PM1/23/19
to da...@davemloft.net, linux...@vger.kernel.org, linux-...@vger.kernel.org, net...@vger.kernel.org, ra...@linux-mips.org, syzkall...@googlegroups.com
syzbot has found a reproducer for the following crash on:
HEAD commit: 333478a7eb21 Merge branch 'for-rc' of git://git.kernel.org..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14ec4628c00000
kernel config: https://syzkaller.appspot.com/x/.config?x=505743eba4e4f68
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+defa70...@syzkaller.appspotmail.com
IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready
8021q: adding VLAN 0 to HW filter on device batadv0
IPVS: ftp: loaded support on port[0] = 21
chnl_net:caif_netlink_parms(): no params data found
BUG: KASAN: use-after-free in refcount_inc_not_zero_checked+0x91/0x2e0
lib/refcount.c:120
Read of size 4 at addr ffff888089bba440 by task syz-executor5/11381
CPU: 1 PID: 11381 Comm: syz-executor5 Not tainted 5.0.0-rc3+ #40
refcount_inc_not_zero_checked+0x91/0x2e0 lib/refcount.c:120
refcount_inc_checked+0x17/0x70 lib/refcount.c:153
sock_hold include/net/sock.h:647 [inline]
____fput+0x16/0x20 fs/file_table.c:309
task_work_run+0x1f4/0x2b0 kernel/task_work.c:113
exit_task_work include/linux/task_work.h:22 [inline]
do_exit+0xad7/0x26e0 kernel/exit.c:867
do_group_exit+0x177/0x430 kernel/exit.c:971
get_signal+0x8b4/0x19b0 kernel/signal.c:2517
do_signal+0x91/0x1ea0 arch/x86/kernel/signal.c:816
exit_to_usermode_loop+0x2f7/0x3b0 arch/x86/entry/common.c:162
Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f7c8a6a7cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000073c228 RCX: 0000000000458099
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000073c228
RBP: 000000000073c220 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000073c22c
R13: 00007ffc1cd8e9ef R14: 00007f7c8a6a89c0 R15: 0000000000000005
Allocated by task 11350:
__kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:469
kasan_kmalloc+0x9/0x10 mm/kasan/common.c:504
__do_kmalloc mm/slab.c:3711 [inline]
__kmalloc+0x15c/0x740 mm/slab.c:3720
kasan_slab_free+0xe/0x10 mm/kasan/common.c:466
__cache_free mm/slab.c:3487 [inline]
kfree+0xcf/0x230 mm/slab.c:3806
nr_heartbeat_expiry+0x489/0x520 net/netrom/nr_timer.c:130
call_timer_fn+0x254/0x900 kernel/time/timer.c:1325
expire_timers kernel/time/timer.c:1362 [inline]
__run_timers+0x6fc/0xd50 kernel/time/timer.c:1681
run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1694
__do_softirq+0x30b/0xb11 kernel/softirq.c:292
The buggy address belongs to the object at ffff888089bba3c0
index:0xffff888089bbb4c0 compound_mapcount: 0
flags: 0x1fffc0000010200(slab|head)
raw: 01fffc0000010200 ffffea0002608f08 ffffea0002501688 ffff88812c3f0c40
raw: ffff888089bbb4c0 ffff888089bba3c0 0000000100000001 0000000000000000
ffff888089bba380: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
> ffff888089bba400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888089bba480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888089bba500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
HEAD commit: 333478a7eb21 Merge branch 'for-rc' of git://git.kernel.org..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14ec4628c00000
kernel config: https://syzkaller.appspot.com/x/.config?x=505743eba4e4f68
dashboard link: https://syzkaller.appspot.com/bug?extid=defa700d16f1bd1b9a05
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=142f7590c00000
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+defa70...@syzkaller.appspotmail.com
8021q: adding VLAN 0 to HW filter on device batadv0
IPVS: ftp: loaded support on port[0] = 21
chnl_net:caif_netlink_parms(): no params data found
==================================================================
BUG: KASAN: use-after-free in atomic_read
include/asm-generic/atomic-instrumented.h:21 [inline]
BUG: KASAN: use-after-free in atomic_read
BUG: KASAN: use-after-free in refcount_inc_not_zero_checked+0x91/0x2e0
lib/refcount.c:120
Read of size 4 at addr ffff888089bba440 by task syz-executor5/11381
CPU: 1 PID: 11381 Comm: syz-executor5 Not tainted 5.0.0-rc3+ #40
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1db/0x2d0 lib/dump_stack.c:113
print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187
kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317
check_memory_region_inline mm/kasan/generic.c:185 [inline]
check_memory_region+0x123/0x190 mm/kasan/generic.c:191
kasan_check_read+0x11/0x20 mm/kasan/common.c:100
atomic_read include/asm-generic/atomic-instrumented.h:21 [inline]
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1db/0x2d0 lib/dump_stack.c:113
print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187
kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317
check_memory_region_inline mm/kasan/generic.c:185 [inline]
check_memory_region+0x123/0x190 mm/kasan/generic.c:191
kasan_check_read+0x11/0x20 mm/kasan/common.c:100
refcount_inc_not_zero_checked+0x91/0x2e0 lib/refcount.c:120
refcount_inc_checked+0x17/0x70 lib/refcount.c:153
sock_hold include/net/sock.h:647 [inline]
nr_release+0x62/0x3c0 net/netrom/af_netrom.c:523
__sock_release+0xd3/0x250 net/socket.c:579
sock_close+0x1b/0x30 net/socket.c:1141
__fput+0x3c5/0xb10 fs/file_table.c:278
__sock_release+0xd3/0x250 net/socket.c:579
sock_close+0x1b/0x30 net/socket.c:1141
____fput+0x16/0x20 fs/file_table.c:309
task_work_run+0x1f4/0x2b0 kernel/task_work.c:113
exit_task_work include/linux/task_work.h:22 [inline]
do_exit+0xad7/0x26e0 kernel/exit.c:867
do_group_exit+0x177/0x430 kernel/exit.c:971
get_signal+0x8b4/0x19b0 kernel/signal.c:2517
do_signal+0x91/0x1ea0 arch/x86/kernel/signal.c:816
exit_to_usermode_loop+0x2f7/0x3b0 arch/x86/entry/common.c:162
prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
do_syscall_64+0x696/0x800 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458099
syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
do_syscall_64+0x696/0x800 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f7c8a6a7cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000073c228 RCX: 0000000000458099
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000073c228
RBP: 000000000073c220 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000073c22c
R13: 00007ffc1cd8e9ef R14: 00007f7c8a6a89c0 R15: 0000000000000005
Allocated by task 11350:
save_stack+0x45/0xd0 mm/kasan/common.c:73
set_track mm/kasan/common.c:85 [inline]
__kasan_kmalloc mm/kasan/common.c:496 [inline]
set_track mm/kasan/common.c:85 [inline]
__kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:469
kasan_kmalloc+0x9/0x10 mm/kasan/common.c:504
__do_kmalloc mm/slab.c:3711 [inline]
__kmalloc+0x15c/0x740 mm/slab.c:3720
kmalloc include/linux/slab.h:550 [inline]
sk_prot_alloc+0x19c/0x2e0 net/core/sock.c:1477
sk_alloc+0xd7/0x1690 net/core/sock.c:1531
nr_create+0xb9/0x5e0 net/netrom/af_netrom.c:436
__sock_create+0x532/0x930 net/socket.c:1277
sock_create net/socket.c:1317 [inline]
__sys_socket+0x106/0x260 net/socket.c:1347
__do_sys_socket net/socket.c:1356 [inline]
__se_sys_socket net/socket.c:1354 [inline]
__x64_sys_socket+0x73/0xb0 net/socket.c:1354
do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 11170:
sk_prot_alloc+0x19c/0x2e0 net/core/sock.c:1477
sk_alloc+0xd7/0x1690 net/core/sock.c:1531
nr_create+0xb9/0x5e0 net/netrom/af_netrom.c:436
__sock_create+0x532/0x930 net/socket.c:1277
sock_create net/socket.c:1317 [inline]
__sys_socket+0x106/0x260 net/socket.c:1347
__do_sys_socket net/socket.c:1356 [inline]
__se_sys_socket net/socket.c:1354 [inline]
__x64_sys_socket+0x73/0xb0 net/socket.c:1354
do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
save_stack+0x45/0xd0 mm/kasan/common.c:73
set_track mm/kasan/common.c:85 [inline]
__kasan_slab_free+0x102/0x150 mm/kasan/common.c:458
set_track mm/kasan/common.c:85 [inline]
kasan_slab_free+0xe/0x10 mm/kasan/common.c:466
__cache_free mm/slab.c:3487 [inline]
kfree+0xcf/0x230 mm/slab.c:3806
sk_prot_free net/core/sock.c:1514 [inline]
__sk_destruct+0x76d/0xa60 net/core/sock.c:1596
sk_destruct+0x7b/0x90 net/core/sock.c:1604
__sk_free+0xce/0x300 net/core/sock.c:1615
sk_free+0x42/0x50 net/core/sock.c:1626
sock_put include/net/sock.h:1707 [inline]
__sk_destruct+0x76d/0xa60 net/core/sock.c:1596
sk_destruct+0x7b/0x90 net/core/sock.c:1604
__sk_free+0xce/0x300 net/core/sock.c:1615
sk_free+0x42/0x50 net/core/sock.c:1626
nr_heartbeat_expiry+0x489/0x520 net/netrom/nr_timer.c:130
call_timer_fn+0x254/0x900 kernel/time/timer.c:1325
expire_timers kernel/time/timer.c:1362 [inline]
__run_timers+0x6fc/0xd50 kernel/time/timer.c:1681
run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1694
__do_softirq+0x30b/0xb11 kernel/softirq.c:292
The buggy address belongs to the object at ffff888089bba3c0
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 128 bytes inside of
2048-byte region [ffff888089bba3c0, ffff888089bbabc0)
The buggy address is located 128 bytes inside of
The buggy address belongs to the page:
page:ffffea000226ee80 count:1 mapcount:0 mapping:ffff88812c3f0c40
index:0xffff888089bbb4c0 compound_mapcount: 0
flags: 0x1fffc0000010200(slab|head)
raw: 01fffc0000010200 ffffea0002608f08 ffffea0002501688 ffff88812c3f0c40
raw: ffff888089bbb4c0 ffff888089bba3c0 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888089bba300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
Memory state around the buggy address:
ffff888089bba380: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
> ffff888089bba400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888089bba480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888089bba500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
syzbot
Jan 24, 2019, 3:18:04 PM1/24/19
to syzkall...@googlegroups.com, xiyou.w...@gmail.com
Hello,
syzbot has tested the proposed patch but the reproducer still triggered
crash:
WARNING: ODEBUG bug in netdev_freemem
IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
------------[ cut here ]------------
ODEBUG: free active (active state 0) object type: timer_list hint:
delayed_work_timer_fn+0x0/0x90 kernel/workqueue.c:4916
hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully
working HSR network
WARNING: CPU: 1 PID: 8315 at lib/debugobjects.c:325
debug_print_object+0x16a/0x250 lib/debugobjects.c:325
hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully
working HSR network
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 8315 Comm: kworker/u4:10 Not tainted 5.0.0-rc3+ #1
8021q: adding VLAN 0 to HW filter on device bond0
Call Trace:
8021q: adding VLAN 0 to HW filter on device team0
hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully
working HSR network
hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully
working HSR network
set: '<NULL>'
__warn.cold+0x20/0x48 kernel/panic.c:571
report_bug+0x263/0x2b0 lib/bug.c:186
fixup_bug arch/x86/kernel/traps.c:178 [inline]
fixup_bug arch/x86/kernel/traps.c:173 [inline]
do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290
invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973
RIP: 0010:debug_print_object+0x16a/0x250 lib/debugobjects.c:325
Code: dd e0 bf 81 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48
8b 14 dd e0 bf 81 88 48 c7 c7 80 b5 81 88 e8 b6 50 ba fd <0f> 0b 83 05 11
e5 ca 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3
RSP: 0018:ffff8880a7f57270 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81685456 RDI: 0000000000000005
RBP: ffff8880a7f572b0 R08: ffff88809ddda3c0 R09: ffffed1015ce3ef9
R10: ffffed1015ce3ef8 R11: ffff8880ae71f7c7 R12: 0000000000000001
R13: ffffffff899ada20 R14: ffffffff816ea710 R15: dffffc0000000000
__debug_check_no_obj_freed lib/debugobjects.c:785 [inline]
debug_check_no_obj_freed+0x39d/0x588 lib/debugobjects.c:817
kfree+0xbd/0x230 mm/slab.c:3805
kvfree+0x61/0x70 mm/util.c:445
netdev_freemem+0x4c/0x60 net/core/dev.c:8991
netdev_release+0x119/0x180 net/core/net-sysfs.c:1640
device_release+0x7d/0x210 drivers/base/core.c:919
kobject_cleanup lib/kobject.c:662 [inline]
kobject_release lib/kobject.c:691 [inline]
kref_put include/linux/kref.h:67 [inline]
kobject_put.cold+0x28f/0x2ec lib/kobject.c:708
netdev_run_todo+0x704/0xae0 net/core/dev.c:8896
rtnl_unlock+0xe/0x10 net/core/rtnetlink.c:117
default_device_exit_batch+0x4d3/0x5f0 net/core/dev.c:9677
ops_exit_list.isra.0+0x105/0x160 net/core/net_namespace.c:156
cleanup_net+0x51d/0xb10 net/core/net_namespace.c:551
process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153
worker_thread+0x143/0x14a0 kernel/workqueue.c:2296
kthread+0x357/0x430 kernel/kthread.c:246
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
======================================================
Tested on:
commit: 6cc7b8183d3d netrom: switch to sock timer API
git tree: https://github.com/congwang/linux.git netrom
console output: https://syzkaller.appspot.com/x/log.txt?x=11fb0e28c00000
kernel config: https://syzkaller.appspot.com/x/.config?x=505743eba4e4f68
syzbot has tested the proposed patch but the reproducer still triggered
crash:
WARNING: ODEBUG bug in netdev_freemem
IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
------------[ cut here ]------------
ODEBUG: free active (active state 0) object type: timer_list hint:
delayed_work_timer_fn+0x0/0x90 kernel/workqueue.c:4916
hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully
working HSR network
WARNING: CPU: 1 PID: 8315 at lib/debugobjects.c:325
debug_print_object+0x16a/0x250 lib/debugobjects.c:325
hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully
working HSR network
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 8315 Comm: kworker/u4:10 Not tainted 5.0.0-rc3+ #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Workqueue: netns cleanup_net
Google 01/01/2011
8021q: adding VLAN 0 to HW filter on device bond0
Call Trace:
8021q: adding VLAN 0 to HW filter on device team0
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1db/0x2d0 lib/dump_stack.c:113
panic+0x2cb/0x65c kernel/panic.c:214
dump_stack+0x1db/0x2d0 lib/dump_stack.c:113
hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully
working HSR network
hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully
working HSR network
8021q: adding VLAN 0 to HW filter on device batadv0
kobject: 'vlan0' (000000002b120e42): kobject_add_internal: parent: 'mesh',
set: '<NULL>'
__warn.cold+0x20/0x48 kernel/panic.c:571
report_bug+0x263/0x2b0 lib/bug.c:186
fixup_bug arch/x86/kernel/traps.c:178 [inline]
fixup_bug arch/x86/kernel/traps.c:173 [inline]
do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290
invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973
RIP: 0010:debug_print_object+0x16a/0x250 lib/debugobjects.c:325
Code: dd e0 bf 81 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48
8b 14 dd e0 bf 81 88 48 c7 c7 80 b5 81 88 e8 b6 50 ba fd <0f> 0b 83 05 11
e5 ca 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3
RSP: 0018:ffff8880a7f57270 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81685456 RDI: 0000000000000005
RBP: ffff8880a7f572b0 R08: ffff88809ddda3c0 R09: ffffed1015ce3ef9
R10: ffffed1015ce3ef8 R11: ffff8880ae71f7c7 R12: 0000000000000001
R13: ffffffff899ada20 R14: ffffffff816ea710 R15: dffffc0000000000
__debug_check_no_obj_freed lib/debugobjects.c:785 [inline]
debug_check_no_obj_freed+0x39d/0x588 lib/debugobjects.c:817
kfree+0xbd/0x230 mm/slab.c:3805
kvfree+0x61/0x70 mm/util.c:445
netdev_freemem+0x4c/0x60 net/core/dev.c:8991
netdev_release+0x119/0x180 net/core/net-sysfs.c:1640
device_release+0x7d/0x210 drivers/base/core.c:919
kobject_cleanup lib/kobject.c:662 [inline]
kobject_release lib/kobject.c:691 [inline]
kref_put include/linux/kref.h:67 [inline]
kobject_put.cold+0x28f/0x2ec lib/kobject.c:708
netdev_run_todo+0x704/0xae0 net/core/dev.c:8896
rtnl_unlock+0xe/0x10 net/core/rtnetlink.c:117
default_device_exit_batch+0x4d3/0x5f0 net/core/dev.c:9677
ops_exit_list.isra.0+0x105/0x160 net/core/net_namespace.c:156
cleanup_net+0x51d/0xb10 net/core/net_namespace.c:551
process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153
worker_thread+0x143/0x14a0 kernel/workqueue.c:2296
kthread+0x357/0x430 kernel/kthread.c:246
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
======================================================
Tested on:
commit: 6cc7b8183d3d netrom: switch to sock timer API
git tree: https://github.com/congwang/linux.git netrom
console output: https://syzkaller.appspot.com/x/log.txt?x=11fb0e28c00000
kernel config: https://syzkaller.appspot.com/x/.config?x=505743eba4e4f68
syzbot
Jan 24, 2019, 3:41:04 PM1/24/19
to syzkall...@googlegroups.com, xiyou.w...@gmail.com
Hello,
syzbot has tested the proposed patch but the reproducer still triggered
crash:
WARNING in batadv_mcast_mla_tt_retract
syzbot has tested the proposed patch but the reproducer still triggered
crash:
team0 (unregistering): Port device team_slave_1 removed
team0 (unregistering): Port device team_slave_0 removed
bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
WARNING: CPU: 1 PID: 9222 at net/batman-adv/multicast.c:337
batadv_mcast_mla_tt_retract+0x3d7/0x4b0 net/batman-adv/multicast.c:337
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 9222 Comm: kworker/u4:11 Not tainted 5.0.0-rc3+ #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Workqueue: bat_events batadv_mcast_mla_update
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1db/0x2d0 lib/dump_stack.c:113
panic+0x2cb/0x65c kernel/panic.c:214
dump_stack+0x1db/0x2d0 lib/dump_stack.c:113
panic+0x2cb/0x65c kernel/panic.c:214
__warn.cold+0x20/0x48 kernel/panic.c:571
report_bug+0x263/0x2b0 lib/bug.c:186
fixup_bug arch/x86/kernel/traps.c:178 [inline]
fixup_bug arch/x86/kernel/traps.c:173 [inline]
do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290
invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973
RIP: 0010:batadv_mcast_mla_tt_retract+0x3d7/0x4b0
report_bug+0x263/0x2b0 lib/bug.c:186
fixup_bug arch/x86/kernel/traps.c:178 [inline]
fixup_bug arch/x86/kernel/traps.c:173 [inline]
do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290
invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973
net/batman-adv/multicast.c:337
Code: 48 8b 45 d0 65 48 33 04 25 28 00 00 00 0f 85 c8 00 00 00 48 81 c4 a0
00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 f9 15 b0 f9 <0f> 0b e9 de fc
ff ff e8 9d 07 f4 f9 e9 e3 fd ff ff 48 89 df e8 b0
RSP: 0000:ffff8880903376b0 EFLAGS: 00010293
RAX: ffff88808e3a2440 RBX: 0000000000000001 RCX: ffffffff87d1e5d3
RDX: 0000000000000000 RSI: ffffffff87d1e8f7 RDI: 0000000000000007
RBP: ffff888090337778 R08: ffff88808e3a2440 R09: 0000000000000003
R10: 0000000000000000 R11: ffff8880ae72dc7b R12: ffff888090337868
R13: 0000000000000000 R14: 1ffff11012066f0d R15: ffff888088e00f40
__batadv_mcast_mla_update net/batman-adv/multicast.c:635 [inline]
batadv_mcast_mla_update+0x78e/0x2980 net/batman-adv/multicast.c:661
process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153
worker_thread+0x143/0x14a0 kernel/workqueue.c:2296
kthread+0x357/0x430 kernel/kthread.c:246
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
worker_thread+0x143/0x14a0 kernel/workqueue.c:2296
kthread+0x357/0x430 kernel/kthread.c:246
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Rebooting in 86400 seconds..
Tested on:
commit: 6cc7b8183d3d netrom: switch to sock timer API
git tree: https://github.com/congwang/linux.git netrom
syzbot
Jan 24, 2019, 4:10:04 PM1/24/19
to syzkall...@googlegroups.com, xiyou.w...@gmail.com
Hello,
syzbot has tested the proposed patch and the reproducer did not trigger
crash:
Reported-and-tested-by:
syzbot+defa70...@syzkaller.appspotmail.com
Tested on:
commit: 6cc7b8183d3d netrom: switch to sock timer API
git tree: https://github.com/congwang/linux.git netrom
syzbot has tested the proposed patch and the reproducer did not trigger
crash:
Reported-and-tested-by:
syzbot+defa70...@syzkaller.appspotmail.com
Tested on:
commit: 6cc7b8183d3d netrom: switch to sock timer API
git tree: https://github.com/congwang/linux.git netrom
kernel config: https://syzkaller.appspot.com/x/.config?x=505743eba4e4f68
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Note: testing is done by a robot and is best-effort only.
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
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