syzbot


WARNING: refcount bug in destroy_nbp_rcu

Status: auto-closed as invalid on 2022/02/06 20:18
Reported-by: syzbot+@syzkaller.appspotmail.com
First crash: 382d, last: 382d

Sample crash report:
------------[ cut here ]------------
refcount_t: decrement hit 0; leaking memory.
WARNING: CPU: 1 PID: 19 at lib/refcount.c:31 refcount_warn_saturate+0xbf/0x1e0 lib/refcount.c:31
Modules linked in:
CPU: 1 PID: 19 Comm: ksoftirqd/1 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:refcount_warn_saturate+0xbf/0x1e0 lib/refcount.c:31
Code: 1d 29 14 82 09 31 ff 89 de e8 ad ae 9e fd 84 db 75 e0 e8 64 a8 9e fd 48 c7 c7 20 2a e4 89 c6 05 09 14 82 09 01 e8 c1 55 1b 05 <0f> 0b eb c4 e8 48 a8 9e fd 0f b6 1d f8 13 82 09 31 ff 89 de e8 78
RSP: 0018:ffffc90000d97d00 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888011995700 RSI: ffffffff815ef908 RDI: fffff520001b2f92
RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815e96ee R11: 0000000000000000 R12: 0000000000000001
R13: ffff8880277005b0 R14: 0000000000000006 R15: ffff88801b697198
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2bf3f000 CR3: 00000000727fc000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __refcount_dec include/linux/refcount.h:344 [inline]
 refcount_dec include/linux/refcount.h:359 [inline]
 dev_put include/linux/netdevice.h:4166 [inline]
 destroy_nbp net/bridge/br_if.c:277 [inline]
 destroy_nbp_rcu+0xd5/0xf0 net/bridge/br_if.c:286
 rcu_do_batch kernel/rcu/tree.c:2506 [inline]
 rcu_core+0x7ab/0x1470 kernel/rcu/tree.c:2741
 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558
 run_ksoftirqd kernel/softirq.c:920 [inline]
 run_ksoftirqd+0x2d/0x60 kernel/softirq.c:912
 smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164
 kthread+0x405/0x4f0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-net-this-kasan-gce 2021/11/08 20:18 net c45231a7668d d29682f1 .config log report info WARNING: refcount bug in destroy_nbp_rcu
ci-upstream-net-this-kasan-gce 2021/11/08 19:43 net c45231a7668d d29682f1 .config log report info WARNING: refcount bug in destroy_nbp_rcu
* Struck through repros no longer work on HEAD.