syzbot


linux-next boot error: kernel BUG in putname

Status: fixed on 2023/02/24 13:51
Subsystems: fs
[Documentation on labels]
Fix commit: 9993a4f989c7 virtio: Revert "virtio: find_vqs() add arg sizes"
First crash: 651d, last: 651d

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/namei.c:262!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 1090 Comm: kworker/u4:0 Not tainted 6.0.0-rc1-next-20220816-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:putname+0x10e/0x140 fs/namei.c:262
Code: 5d 41 5c 41 5d e9 f2 4f a1 ff e8 ed 4f a1 ff 48 89 ee 4c 89 ef e8 b2 67 ed ff 5b 5d 41 5c 41 5d e9 d7 4f a1 ff e8 d2 4f a1 ff <0f> 0b e8 ab a3 ed ff e9 3a ff ff ff 48 89 ef e8 ae a3 ed ff e9 75
RSP: 0000:ffffc90005b5fea0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888020b6d880 RSI: ffffffff81dac54e RDI: 0000000000000005
RBP: ffff888020cca200 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000008c07c R12: 00000000fffffffe
R13: ffff888020cca200 R14: ffff888020b72000 R15: ffff888020b72018
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000000bc8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kernel_execve+0x407/0x500 fs/exec.c:2013
 call_usermodehelper_exec_async+0x2e3/0x580 kernel/umh.c:112
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:putname+0x10e/0x140 fs/namei.c:262
Code: 5d 41 5c 41 5d e9 f2 4f a1 ff e8 ed 4f a1 ff 48 89 ee 4c 89 ef e8 b2 67 ed ff 5b 5d 41 5c 41 5d e9 d7 4f a1 ff e8 d2 4f a1 ff <0f> 0b e8 ab a3 ed ff e9 3a ff ff ff 48 89 ef e8 ae a3 ed ff e9 75
RSP: 0000:ffffc90005b5fea0 EFLAGS: 00010293

RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888020b6d880 RSI: ffffffff81dac54e RDI: 0000000000000005
RBP: ffff888020cca200 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000008c07c R12: 00000000fffffffe
R13: ffff888020cca200 R14: ffff888020b72000 R15: ffff888020b72018
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000000bc8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/08/16 07:00 linux-next e1084bacab44 7a7cb304 .config console log report ci-upstream-linux-next-kasan-gce-root linux-next boot error: kernel BUG in putname
* Struck through repros no longer work on HEAD.