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a-nogikha-nogikh
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pkg/report: ignore the drop_nlink frame
It's a helper used by many different filesystems. Let's be more specific. https://syzkaller.appspot.com/bug?extid=651ca866e5e2b4b5095b
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‎pkg/report/linux.go‎

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@@ -1331,6 +1331,7 @@ var linuxStackParams = &stackParams{
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"cleanup_srcu_struct",
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"rhashtable_lookup",
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"extract_(user|iter)_to_sg",
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"drop_nlink",
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},
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corruptedLines: []*regexp.Regexp{
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// Fault injection stacks are frequently intermixed with crash reports.

‎pkg/report/testdata/linux/report/730‎

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TITLE: WARNING in udf_rmdir
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TYPE: WARNING
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FRAME: udf_rmdir
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[ 62.102480][ T5830] ------------[ cut here ]------------
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[ 62.108072][ T5830] WARNING: CPU: 1 PID: 5830 at fs/inode.c:336 drop_nlink+0xc4/0x110
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[ 62.116109][ T5830] Modules linked in:
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[ 62.120143][ T5830] CPU: 1 UID: 0 PID: 5830 Comm: syz-executor175 Not tainted 6.12.0-rc7-syzkaller-00012-g3022e9d00ebe #0
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[ 62.131354][ T5830] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
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[ 62.141522][ T5830] RIP: 0010:drop_nlink+0xc4/0x110
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[ 62.146570][ T5830] Code: bb 70 07 00 00 be 08 00 00 00 e8 87 0b e6 ff f0 48 ff 83 70 07 00 00 5b 41 5c 41 5e 41 5f 5d c3 cc cc cc cc e8 ad 61 7f ff 90 <0f> 0b 90 eb 83 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 5c ff ff ff
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[ 62.166276][ T5830] RSP: 0018:ffffc900039cfad0 EFLAGS: 00010293
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[ 62.172448][ T5830] RAX: ffffffff82157803 RBX: 1ffff1100fcf3100 RCX: ffff888035123c00
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[ 62.180525][ T5830] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
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[ 62.188566][ T5830] RBP: 0000000000000000 R08: ffffffff82157783 R09: 1ffff92000739ed8
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[ 62.196557][ T5830] R10: dffffc0000000000 R11: fffff52000739ed9 R12: ffff88807e798800
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[ 62.204615][ T5830] R13: ffffc900039cfb80 R14: ffff88807e7987b8 R15: dffffc0000000000
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[ 62.212627][ T5830] FS: 000055557128d380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
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[ 62.221715][ T5830] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
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[ 62.228338][ T5830] CR2: 00007faacd595ed8 CR3: 0000000012376000 CR4: 00000000003526f0
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[ 62.236304][ T5830] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
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[ 62.244346][ T5830] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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[ 62.252357][ T5830] Call Trace:
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[ 62.255628][ T5830] <TASK>
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[ 62.258614][ T5830] ? __warn+0x168/0x4e0
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[ 62.262782][ T5830] ? drop_nlink+0xc4/0x110
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[ 62.267192][ T5830] ? report_bug+0x2b3/0x500
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[ 62.271748][ T5830] ? drop_nlink+0xc4/0x110
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[ 62.276188][ T5830] ? handle_bug+0x60/0x90
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[ 62.280628][ T5830] ? exc_invalid_op+0x1a/0x50
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[ 62.285330][ T5830] ? asm_exc_invalid_op+0x1a/0x20
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[ 62.290433][ T5830] ? drop_nlink+0x43/0x110
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[ 62.294862][ T5830] ? drop_nlink+0xc3/0x110
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[ 62.299351][ T5830] ? drop_nlink+0xc4/0x110
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[ 62.303800][ T5830] udf_rmdir+0x3bc/0x730
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[ 62.308589][ T5830] ? __pfx_udf_rmdir+0x10/0x10
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[ 62.313413][ T5830] ? down_write+0x18c/0x220
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[ 62.318010][ T5830] ? __pfx_down_write+0x10/0x10
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[ 62.322877][ T5830] ? do_raw_spin_unlock+0x13c/0x8b0
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[ 62.328121][ T5830] ? bpf_lsm_inode_rmdir+0x9/0x10
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[ 62.333171][ T5830] ? security_inode_rmdir+0xd9/0x340
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[ 62.338535][ T5830] vfs_rmdir+0x3a3/0x510
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[ 62.342799][ T5830] do_rmdir+0x3b5/0x580
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[ 62.346954][ T5830] ? __pfx_do_rmdir+0x10/0x10
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[ 62.351693][ T5830] ? getname_flags+0x1e3/0x540
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[ 62.356477][ T5830] __x64_sys_rmdir+0x47/0x50
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[ 62.361144][ T5830] do_syscall_64+0xf3/0x230
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[ 62.365735][ T5830] ? clear_bhb_loop+0x35/0x90
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[ 62.370593][ T5830] entry_SYSCALL_64_after_hwframe+0x77/0x7f
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[ 62.376502][ T5830] RIP: 0033:0x7fc98d0ebd99
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[ 62.381011][ T5830] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 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 b8 ff ff ff f7 d8 64 89 01 48
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[ 62.400722][ T5830] RSP: 002b:00007ffd4fd5f668 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
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[ 62.409184][ T5830] RAX: ffffffffffffffda RBX: 000000000000001d RCX: 00007fc98d0ebd99
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[ 62.417168][ T5830] RDX: 00007fc98d0ebd99 RSI: 00007fc98d0ebd99 RDI: 0000000020000000
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[ 62.425223][ T5830] RBP: 00007fc98d1605f0 R08: 000055557128e4c0 R09: 000055557128e4c0
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[ 62.433236][ T5830] R10: 000055557128e4c0 R11: 0000000000000246 R12: 00007ffd4fd5f690
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[ 62.441314][ T5830] R13: 00007ffd4fd5f8b8 R14: 431bde82d7b634db R15: 00007fc98d13503b
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[ 62.449467][ T5830] </TASK>
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[ 62.452504][ T5830] Kernel panic - not syncing: kernel: panic_on_warn set ...
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[ 62.459790][ T5830] CPU: 1 UID: 0 PID: 5830 Comm: syz-executor175 Not tainted 6.12.0-rc7-syzkaller-00012-g3022e9d00ebe #0
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[ 62.470892][ T5830] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
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[ 62.481030][ T5830] Call Trace:
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[ 62.484303][ T5830] <TASK>
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[ 62.487233][ T5830] dump_stack_lvl+0x241/0x360
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[ 62.491917][ T5830] ? __pfx_dump_stack_lvl+0x10/0x10
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[ 62.497111][ T5830] ? __pfx__printk+0x10/0x10
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[ 62.501695][ T5830] ? _printk+0xd5/0x120
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[ 62.505845][ T5830] ? __init_begin+0x41000/0x41000
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[ 62.510866][ T5830] ? vscnprintf+0x5d/0x90
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[ 62.515194][ T5830] panic+0x349/0x880
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[ 62.519086][ T5830] ? __warn+0x177/0x4e0
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[ 62.523235][ T5830] ? __pfx_panic+0x10/0x10
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[ 62.527643][ T5830] ? show_trace_log_lvl+0x3b2/0x410
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[ 62.532862][ T5830] __warn+0x34b/0x4e0
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[ 62.536839][ T5830] ? drop_nlink+0xc4/0x110
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[ 62.541259][ T5830] report_bug+0x2b3/0x500
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[ 62.545606][ T5830] ? drop_nlink+0xc4/0x110
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[ 62.550023][ T5830] handle_bug+0x60/0x90
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[ 62.554172][ T5830] exc_invalid_op+0x1a/0x50
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[ 62.558693][ T5830] asm_exc_invalid_op+0x1a/0x20
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[ 62.563554][ T5830] RIP: 0010:drop_nlink+0xc4/0x110
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[ 62.568593][ T5830] Code: bb 70 07 00 00 be 08 00 00 00 e8 87 0b e6 ff f0 48 ff 83 70 07 00 00 5b 41 5c 41 5e 41 5f 5d c3 cc cc cc cc e8 ad 61 7f ff 90 <0f> 0b 90 eb 83 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 5c ff ff ff
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[ 62.588203][ T5830] RSP: 0018:ffffc900039cfad0 EFLAGS: 00010293
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[ 62.594276][ T5830] RAX: ffffffff82157803 RBX: 1ffff1100fcf3100 RCX: ffff888035123c00
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[ 62.602241][ T5830] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
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[ 62.610207][ T5830] RBP: 0000000000000000 R08: ffffffff82157783 R09: 1ffff92000739ed8
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[ 62.618175][ T5830] R10: dffffc0000000000 R11: fffff52000739ed9 R12: ffff88807e798800
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[ 62.626160][ T5830] R13: ffffc900039cfb80 R14: ffff88807e7987b8 R15: dffffc0000000000
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[ 62.634169][ T5830] ? drop_nlink+0x43/0x110
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[ 62.638594][ T5830] ? drop_nlink+0xc3/0x110
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[ 62.643021][ T5830] udf_rmdir+0x3bc/0x730
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[ 62.647268][ T5830] ? __pfx_udf_rmdir+0x10/0x10
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[ 62.652052][ T5830] ? down_write+0x18c/0x220
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[ 62.656552][ T5830] ? __pfx_down_write+0x10/0x10
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[ 62.661404][ T5830] ? do_raw_spin_unlock+0x13c/0x8b0
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[ 62.666608][ T5830] ? bpf_lsm_inode_rmdir+0x9/0x10
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[ 62.671630][ T5830] ? security_inode_rmdir+0xd9/0x340
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[ 62.676911][ T5830] vfs_rmdir+0x3a3/0x510
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[ 62.681159][ T5830] do_rmdir+0x3b5/0x580
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[ 62.685323][ T5830] ? __pfx_do_rmdir+0x10/0x10
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[ 62.690037][ T5830] ? getname_flags+0x1e3/0x540
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[ 62.694813][ T5830] __x64_sys_rmdir+0x47/0x50
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[ 62.699411][ T5830] do_syscall_64+0xf3/0x230
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[ 62.703926][ T5830] ? clear_bhb_loop+0x35/0x90
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[ 62.708609][ T5830] entry_SYSCALL_64_after_hwframe+0x77/0x7f
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[ 62.714504][ T5830] RIP: 0033:0x7fc98d0ebd99
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[ 62.718917][ T5830] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 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 b8 ff ff ff f7 d8 64 89 01 48
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[ 62.738519][ T5830] RSP: 002b:00007ffd4fd5f668 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
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[ 62.746931][ T5830] RAX: ffffffffffffffda RBX: 000000000000001d RCX: 00007fc98d0ebd99
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[ 62.754923][ T5830] RDX: 00007fc98d0ebd99 RSI: 00007fc98d0ebd99 RDI: 0000000020000000
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[ 62.762906][ T5830] RBP: 00007fc98d1605f0 R08: 000055557128e4c0 R09: 000055557128e4c0
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[ 62.770881][ T5830] R10: 000055557128e4c0 R11: 0000000000000246 R12: 00007ffd4fd5f690
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[ 62.778850][ T5830] R13: 00007ffd4fd5f8b8 R14: 431bde82d7b634db R15: 00007fc98d13503b
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[ 62.786841][ T5830] </TASK>
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[ 62.790114][ T5830] Kernel Offset: disabled
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[ 62.794489][ T5830] Rebooting in 86400 seconds..

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