syzbot


WARNING in do_mknodat (3)

Status: upstream: reported on 2024/10/06 10:51
Reported-by: syzbot+3fd0cea8c9d8df19c688@syzkaller.appspotmail.com
First crash: 113d, last: 3d08h
Similar bugs (8)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in do_mknodat fs 1 767d 711d 0/28 closed as invalid on 2023/02/16 16:02
upstream WARNING in do_mknodat (3) fs 136 8d04h 332d 0/28 moderation: reported on 2024/03/01 11:23
linux-6.1 WARNING in do_mknodat 1 452d 452d 0/3 auto-obsoleted due to no activity on 2024/02/10 13:02
upstream WARNING in do_mknodat (2) fs 11 436d 705d 0/28 auto-obsoleted due to no activity on 2024/02/16 05:28
linux-6.1 WARNING in do_mknodat (2) 39 220d 287d 0/3 auto-obsoleted due to no activity on 2024/08/30 19:08
linux-5.15 WARNING in do_mknodat (3) 7 5d07h 102d 0/3 upstream: reported on 2024/10/17 18:39
linux-5.15 WARNING in do_mknodat (2) 4 241d 418d 0/3 auto-obsoleted due to no activity on 2024/09/08 20:03
linux-5.15 WARNING in do_mknodat 1 529d 529d 0/3 auto-obsoleted due to no activity on 2023/11/25 05:54

Sample crash report:
------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff88805543d450, owner = 0x0, curr 0xffff88803124d940, list empty
WARNING: CPU: 1 PID: 13957 at kernel/locking/rwsem.c:1372 __up_write kernel/locking/rwsem.c:1371 [inline]
WARNING: CPU: 1 PID: 13957 at kernel/locking/rwsem.c:1372 up_write+0x4f5/0x580 kernel/locking/rwsem.c:1626
Modules linked in:
CPU: 1 PID: 13957 Comm: syz.8.1871 Tainted: G        W          6.1.122-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__up_write kernel/locking/rwsem.c:1371 [inline]
RIP: 0010:up_write+0x4f5/0x580 kernel/locking/rwsem.c:1626
Code: 48 c7 c7 e0 f6 0b 8b 48 c7 c6 20 f9 0b 8b 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 2f c3 e8 ff 48 83 c4 08 <0f> 0b e9 71 fd ff ff 48 c7 c1 78 3b 9b 8e 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc900050ffd20 EFLAGS: 00010292
RAX: 6d36506102ec7000 RBX: ffffffff8b0bf7c0 RCX: 0000000000080000
RDX: ffffc9000cdda000 RSI: 000000000001d53c RDI: 000000000001d53d
RBP: ffffc900050ffdf0 R08: ffffffff8152b84e R09: fffff52000a1ff05
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff88805543d450 R14: 1ffff92000a1ffac R15: dffffc0000000000
FS:  00007fd4ead566c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2db19ff8 CR3: 000000005689d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_unlock include/linux/fs.h:763 [inline]
 done_path_create fs/namei.c:3927 [inline]
 do_mknodat+0x44f/0x5a0 fs/namei.c:4050
 __do_sys_mknod fs/namei.c:4068 [inline]
 __se_sys_mknod fs/namei.c:4066 [inline]
 __x64_sys_mknod+0x8a/0xa0 fs/namei.c:4066
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fd4e9f85d29
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:00007fd4ead56038 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 00007fd4ea176080 RCX: 00007fd4e9f85d29
RDX: 0000000000000710 RSI: 0000000000002000 RDI: 0000000020000080
RBP: 00007fd4ea001b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd4ea176080 R15: 00007ffd627a7a08
 </TASK>

Crashes (16):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/12/29 16:54 linux-6.1.y 563edd786f0a d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in do_mknodat
2024/12/27 16:53 linux-6.1.y 563edd786f0a d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in do_mknodat
2024/12/19 07:02 linux-6.1.y 52f863f820fd 1432fc84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in do_mknodat
2024/12/08 12:20 linux-6.1.y e4d90d63d385 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in do_mknodat
2024/10/06 10:50 linux-6.1.y aa4cd140bba5 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in do_mknodat
2025/01/24 18:18 linux-6.1.y 75cefdf153f5 1293872d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in do_mknodat
2025/01/22 19:04 linux-6.1.y f4f677285b38 a44b0418 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in do_mknodat
2025/01/20 18:52 linux-6.1.y f4f677285b38 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in do_mknodat
2025/01/16 17:09 linux-6.1.y c63962be84ef f9e07a6e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in do_mknodat
2024/12/17 22:47 linux-6.1.y 52f863f820fd a0626d3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in do_mknodat
2024/12/14 22:16 linux-6.1.y 52f863f820fd 7cbfbb3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in do_mknodat
2024/12/12 04:48 linux-6.1.y e4d90d63d385 6f1b0fa8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in do_mknodat
2024/12/05 11:36 linux-6.1.y e4d90d63d385 29f61fce .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in do_mknodat
2024/12/03 22:44 linux-6.1.y e4d90d63d385 b50eb251 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in do_mknodat
2024/10/16 00:16 linux-6.1.y aa4cd140bba5 bde2d81c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in do_mknodat
2024/10/10 04:17 linux-6.1.y aa4cd140bba5 0278d004 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in do_mknodat
* Struck through repros no longer work on HEAD.