syzbot


WARNING in lec_atm_close

Status: closed as invalid on 2025/07/31 14:51
Subsystems: net
[Documentation on labels]
First crash: 69d, last: 68d

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 10607 at ./include/linux/netdevice.h:2636 netdev_get_tx_queue include/linux/netdevice.h:2636 [inline]
WARNING: CPU: 0 PID: 10607 at ./include/linux/netdevice.h:2636 netif_stop_queue include/linux/netdevice.h:3612 [inline]
WARNING: CPU: 0 PID: 10607 at ./include/linux/netdevice.h:2636 lec_atm_close+0x942/0xb10 net/atm/lec.c:477
Modules linked in:
CPU: 0 UID: 0 PID: 10607 Comm: syz.6.1365 Not tainted 6.16.0-rc2-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:netdev_get_tx_queue include/linux/netdevice.h:2636 [inline]
RIP: 0010:netif_stop_queue include/linux/netdevice.h:3612 [inline]
RIP: 0010:lec_atm_close+0x942/0xb10 net/atm/lec.c:477
Code: c6 01 8d 48 c7 c6 80 dd 01 8d e8 f9 21 ec f6 31 ff 48 83 c4 38 5b 5d 41 5c 41 5d 41 5e 41 5f e9 04 e8 f6 f6 e8 7f 4d 0d f7 90 <0f> 0b 90 e9 89 f7 ff ff 48 89 df e8 ce 2f 73 f7 e9 da f8 ff ff 48
RSP: 0018:ffffc90003327d00 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8aaec54b
RDX: ffff8880314a9e00 RSI: ffffffff8aaecdc1 RDI: 0000000000000005
RBP: ffff88803530c000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff8d014ec0
R13: ffff88803530c000 R14: 0000000000000000 R15: ffff88805643b6c0
FS:  0000555560c56500(0000) GS:ffff88812475a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31ae6ff8 CR3: 0000000051639000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 vcc_destroy_socket net/atm/common.c:181 [inline]
 vcc_release+0x12f/0x550 net/atm/common.c:205
 __sock_release+0xb3/0x270 net/socket.c:647
 sock_close+0x1c/0x30 net/socket.c:1391
 __fput+0x402/0xb70 fs/file_table.c:465
 task_work_run+0x150/0x240 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xeb/0x110 kernel/entry/common.c:114
 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
 do_syscall_64+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f430798e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe4a0136e8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f4307bb7ba0 RCX: 00007f430798e929
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f4307bb7ba0 R08: 00000000000381a4 R09: 000000074a0139df
R10: 00000000005c684c R11: 0000000000000246 R12: 0000000000073f4b
R13: 00007ffe4a0137e0 R14: ffffffffffffffff R15: 00007ffe4a013800
 </TASK>

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/16 16:04 upstream e04c78d86a96 d1716036 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in lec_atm_close
2025/06/16 07:53 upstream 08215f5486ec 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in lec_atm_close
* Struck through repros no longer work on HEAD.