syzbot


WARNING: refcount bug in ax25_release (3)

Status: upstream: reported on 2024/05/26 23:38
Subsystems: hams
[Documentation on labels]
Reported-by: syzbot+33841dc6aa3e1d86b78a@syzkaller.appspotmail.com
First crash: 22d, last: 1d02h
Discussions (2)
Title Replies (including bot) Last reply
[syzbot] Monthly hams report (Jun 2024) 0 (1) 2024/06/11 13:40
[syzbot] [hams?] WARNING: refcount bug in ax25_release (3) 0 (1) 2024/05/26 23:38
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING: refcount bug in ax25_release hams 1 275d 275d 0/27 closed as invalid on 2023/12/15 13:48
upstream WARNING: refcount bug in ax25_release (2) hams C 240 22d 88d 26/27 fixed on 2024/05/22 23:16

Sample crash report:
------------[ cut here ]------------
refcount_t: decrement hit 0; leaking memory.
WARNING: CPU: 1 PID: 9431 at lib/refcount.c:31 refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31
Modules linked in:
CPU: 1 PID: 9431 Comm: syz-executor.4 Not tainted 6.10.0-rc3-syzkaller-00022-gcea2a26553ac #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:31
Code: b2 00 00 00 e8 d7 b9 e6 fc 5b 5d e9 db d3 00 07 e8 cb b9 e6 fc c6 05 6b 5c e8 0a 01 90 48 c7 c7 20 a3 1f 8c e8 47 e8 a8 fc 90 <0f> 0b 90 90 eb d9 e8 ab b9 e6 fc c6 05 48 5c e8 0a 01 90 48 c7 c7
RSP: 0018:ffffc90004017b68 EFLAGS: 00010246
RAX: afc7050366384100 RBX: ffff88802befc664 RCX: ffff888040b03c00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000004 R08: ffffffff81585822 R09: fffffbfff1c39994
R10: dffffc0000000000 R11: fffffbfff1c39994 R12: ffff88802befc620
R13: 0000000000000000 R14: ffff88802befc664 R15: dffffc0000000000
FS:  000055557a801480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f16642e56c6 CR3: 0000000022238000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __refcount_dec include/linux/refcount.h:336 [inline]
 refcount_dec include/linux/refcount.h:351 [inline]
 ref_tracker_free+0x6af/0x7e0 lib/ref_tracker.c:236
 netdev_tracker_free include/linux/netdevice.h:4058 [inline]
 netdev_put include/linux/netdevice.h:4075 [inline]
 ax25_release+0x368/0x950 net/ax25/af_ax25.c:1069
 __sock_release net/socket.c:659 [inline]
 sock_close+0xbe/0x240 net/socket.c:1421
 __fput+0x408/0x8b0 fs/file_table.c:422
 task_work_run+0x251/0x310 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f30cf27cea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffce67fedd8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 0000000000043942 RCX: 00007f30cf27cea9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: ffffffffffffffff R08: 0000000000000001 R09: 0000000900000000
R10: 00007f30cf200000 R11: 0000000000000246 R12: 00007f30cf3b4050
R13: 00007f30cf3b405c R14: 0000000000000032 R15: 00007f30cf3b5980
 </TASK>

Crashes (37):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/12 22:04 upstream cea2a26553ac 4d75f4f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: refcount bug in ax25_release
2024/06/12 01:48 upstream 83a7eefedc9b c7d7d815 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING: refcount bug in ax25_release
2024/06/06 17:14 upstream 2df0193e62cf 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: refcount bug in ax25_release
2024/05/31 18:35 upstream 4a4be1ad3a6e 3113787f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING: refcount bug in ax25_release
2024/05/25 15:57 upstream 56fb6f92854f a10a183e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING: refcount bug in ax25_release
2024/06/11 06:51 upstream 83a7eefedc9b c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING: refcount bug in ax25_release
2024/06/06 17:12 net b0c9a2643541 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING: refcount bug in ax25_release
2024/06/06 17:08 net b0c9a2643541 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING: refcount bug in ax25_release
2024/06/13 11:38 net-next 91579c93a9b2 2aa5052f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/06/13 11:30 net-next 91579c93a9b2 2aa5052f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/06/12 17:30 net-next 45403b12c29c 4d75f4f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/06/12 17:09 net-next 45403b12c29c 4d75f4f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/06/12 12:45 net-next 45403b12c29c 4d75f4f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/06/12 05:36 net-next 45403b12c29c 4d75f4f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/06/12 02:21 net-next bb678f01804c 4d75f4f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/06/12 02:21 net-next bb678f01804c 4d75f4f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/06/12 02:21 net-next bb678f01804c 4d75f4f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/06/11 20:05 net-next bb678f01804c c7d7d815 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/06/08 16:17 net-next a99997323654 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/06/07 14:10 net-next 62b5bf58b928 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/06/07 05:50 net-next 62b5bf58b928 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/06/05 23:57 net-next 54751f4d5406 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/06/04 23:18 net-next 2b438c5774cc a1feae05 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/06/01 15:52 net-next e19de2064fdf 3113787f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/06/01 15:52 net-next e19de2064fdf 3113787f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/05/31 14:52 net-next ccf23c916ca3 34889ee3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/05/31 05:47 net-next 030fae30f059 34889ee3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/05/31 02:00 net-next 030fae30f059 34889ee3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/05/31 02:00 net-next 030fae30f059 34889ee3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/05/30 23:43 net-next 782471db6c72 34889ee3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/05/25 01:05 net-next 66ad4829ddd0 a10a183e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/05/25 01:05 net-next 66ad4829ddd0 a10a183e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/05/23 09:32 net-next 4b377b4868ef 4d098039 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/05/23 08:08 net-next 4b377b4868ef 4d098039 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/05/23 04:45 net-next 4b377b4868ef 4d098039 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/05/22 23:27 net-next 4b377b4868ef 4d098039 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: refcount bug in ax25_release
2024/06/06 21:29 linux-next ee78a17615ad 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING: refcount bug in ax25_release
* Struck through repros no longer work on HEAD.