ci starts bisection 2023-02-11 01:22:28.439779239 +0000 UTC m=+38812.111570943
bisecting fixing commit since 60d86034b14eed902b3f2bea97d0c237cf2f9499
building syzkaller on 96166539c4c242fccd41c7316b7080377dca428b
ensuring issue is reproducible on original commit 60d86034b14eed902b3f2bea97d0c237cf2f9499
testing commit 60d86034b14eed902b3f2bea97d0c237cf2f9499 gcc
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 1fa6f10a0fcd25e751e05bd2c888e77562a16cb60834825ad768f5e73e625bb1
all runs: crashed: possible deadlock in br_multicast_rcv
testing current HEAD d12f9ad028062ff3ee2bfca3247f8812269d1f06
testing commit d12f9ad028062ff3ee2bfca3247f8812269d1f06 gcc
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 156a5373aeaf13ce91542789c7e6d96aeac44c620d26433265cfee1c45c8b85a
run #0: crashed: INFO: trying to register non-static key in net_free
run #1: crashed: INFO: trying to register non-static key in net_free
run #2: crashed: INFO: trying to register non-static key in net_free
run #3: crashed: unregister_netdevice: waiting for DEV to become free
run #4: crashed: INFO: trying to register non-static key in net_free
run #5: crashed: INFO: trying to register non-static key in net_free
run #6: crashed: INFO: trying to register non-static key in net_free
run #7: crashed: unregister_netdevice: waiting for DEV to become free
run #8: crashed: unregister_netdevice: waiting for DEV to become free
run #9: crashed: INFO: trying to register non-static key in net_free
revisions tested: 2, total time: 44m3.471672252s (build: 29m32.142316326s, test: 13m56.535032286s)
the crash still happens on HEAD
commit msg: Documentation: isdn: correct spelling
crash: INFO: trying to register non-static key in net_free
INFO: trying to register non-static key.
The code is fine but needs lockdep annotation, or maybe
you didn't initialize this object before use?
turning off the locking correctness validator.
CPU: 0 PID: 6196 Comm: syz-executor.0 Not tainted 6.2.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x5b/0x81 lib/dump_stack.c:106
assign_lock_key kernel/locking/lockdep.c:981 [inline]
register_lock_class+0xf1b/0x1120 kernel/locking/lockdep.c:1294
__lock_acquire+0x109/0x56d0 kernel/locking/lockdep.c:4934
lock_acquire kernel/locking/lockdep.c:5668 [inline]
lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3d/0x60 kernel/locking/spinlock.c:162
ref_tracker_dir_exit+0x4c/0x3b0 lib/ref_tracker.c:24
net_free net/core/net_namespace.c:442 [inline]
net_free+0x59/0x80 net/core/net_namespace.c:436
copy_net_ns+0x3d0/0x540 net/core/net_namespace.c:493
create_new_namespaces+0x35a/0x920 kernel/nsproxy.c:110
unshare_nsproxy_namespaces+0x8a/0x1a0 kernel/nsproxy.c:228
ksys_unshare+0x30d/0x6b0 kernel/fork.c:3202
__do_sys_unshare kernel/fork.c:3273 [inline]
__se_sys_unshare kernel/fork.c:3271 [inline]
__x64_sys_unshare+0x2c/0x40 kernel/fork.c:3271
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f4c5568d687
Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe5897dd68 EFLAGS: 00000202 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007ffe5897e3a8 RCX: 00007f4c5568d687
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00007ffe5897de48 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00000000fffffff1
R13: 00007ffe5897de40 R14: 0000000000000000 R15: 0000000000000000
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 6196 Comm: syz-executor.0 Not tainted 6.2.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
RIP: 0010:ref_tracker_dir_exit+0x8c/0x3b0 lib/ref_tracker.c:25
Code: 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 2b 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 75 60 4c 89 f2 4d 89 f1 48 c1 ea 03 <80> 3c 02 00 0f 85 f2 02 00 00 4c 39 34 24 49 8b 1e 0f 84 11 01 00
RSP: 0018:ffffc90005aefd00 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: 00000000fffffffc RCX: ffffffff815bb0d4
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffc90005aefc70
RBP: ffff8880276e9e80 R08: 0000000000000001 R09: 0000000000000000
R10: fffff52000b5df8e R11: 3e4b5341542f3c20 R12: ffff8880276e9cc0
R13: ffffffff8b657120 R14: 0000000000000000 R15: ffffffff8b643804
FS: 00005555567fd400(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc843e2f040 CR3: 000000001c02a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
net_free net/core/net_namespace.c:442 [inline]
net_free+0x59/0x80 net/core/net_namespace.c:436
copy_net_ns+0x3d0/0x540 net/core/net_namespace.c:493
create_new_namespaces+0x35a/0x920 kernel/nsproxy.c:110
unshare_nsproxy_namespaces+0x8a/0x1a0 kernel/nsproxy.c:228
ksys_unshare+0x30d/0x6b0 kernel/fork.c:3202
__do_sys_unshare kernel/fork.c:3273 [inline]
__se_sys_unshare kernel/fork.c:3271 [inline]
__x64_sys_unshare+0x2c/0x40 kernel/fork.c:3271
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f4c5568d687
Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe5897dd68 EFLAGS: 00000202 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007ffe5897e3a8 RCX: 00007f4c5568d687
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00007ffe5897de48 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00000000fffffff1
R13: 00007ffe5897de40 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ref_tracker_dir_exit+0x8c/0x3b0 lib/ref_tracker.c:25
Code: 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 2b 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 75 60 4c 89 f2 4d 89 f1 48 c1 ea 03 <80> 3c 02 00 0f 85 f2 02 00 00 4c 39 34 24 49 8b 1e 0f 84 11 01 00
RSP: 0018:ffffc90005aefd00 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: 00000000fffffffc RCX: ffffffff815bb0d4
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffc90005aefc70
RBP: ffff8880276e9e80 R08: 0000000000000001 R09: 0000000000000000
R10: fffff52000b5df8e R11: 3e4b5341542f3c20 R12: ffff8880276e9cc0
R13: ffffffff8b657120 R14: 0000000000000000 R15: ffffffff8b643804
FS: 00005555567fd400(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc843e2f040 CR3: 000000001c02a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 4 bytes skipped:
0: 48 c1 ea 03 shr $0x3,%rdx
4: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
8: 0f 85 2b 03 00 00 jne 0x339
e: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
15: fc ff df
18: 4c 8b 75 60 mov 0x60(%rbp),%r14
1c: 4c 89 f2 mov %r14,%rdx
1f: 4d 89 f1 mov %r14,%r9
22: 48 c1 ea 03 shr $0x3,%rdx
* 26: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2a: 0f 85 f2 02 00 00 jne 0x322
30: 4c 39 34 24 cmp %r14,(%rsp)
34: 49 8b 1e mov (%r14),%rbx
37: 0f .byte 0xf
38: 84 11 test %dl,(%rcx)
3a: 01 00 add %eax,(%rax)