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WARNING in do_mkdirat (3)

Status: auto-obsoleted due to no activity on 2025/07/02 00:38
Reported-by: syzbot+36262c2b9a30c332218c@syzkaller.appspotmail.com
First crash: 259d, last: 191d
▶ ▼ Similar bugs (6)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in do_mkdirat -1 7 711d 935d 0/3 auto-obsoleted due to no activity on 2024/02/28 16:21
linux-6.1 WARNING in do_mkdirat (2) -1 60 331d 583d 0/3 auto-obsoleted due to no activity on 2025/02/12 20:24
linux-6.1 WARNING in do_mkdirat (4) -1 2 5d01h 68d 0/3 upstream: reported on 2025/08/24 17:03
linux-6.6 WARNING in do_mkdirat -1 1 39d 39d 0/2 upstream: reported on 2025/09/22 18:38
upstream WARNING in do_mkdirat fs -1 C error error 593 9h00m 1063d 0/29 upstream: reported C repro on 2022/12/03 14:52
linux-5.15 WARNING in do_mkdirat origin:lts-only -1 C inconclusive 21 11d 849d 0/3 upstream: reported C repro on 2023/07/05 09:42

Sample crash report:
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff888077e9cac8, owner = 0x0, curr 0xffff88802bcabb80, list empty
WARNING: CPU: 0 PID: 5402 at kernel/locking/rwsem.c:1372 __up_write kernel/locking/rwsem.c:1371 [inline]
WARNING: CPU: 0 PID: 5402 at kernel/locking/rwsem.c:1372 up_write+0x4f5/0x580 kernel/locking/rwsem.c:1626
Modules linked in:
CPU: 0 PID: 5402 Comm: syz.0.249 Not tainted 6.1.134-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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 c0 ff 0b 8b 48 c7 c6 00 02 0c 8b 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 7f d8 e8 ff 48 83 c4 08 <0f> 0b e9 71 fd ff ff 48 c7 c1 f8 f1 a0 8e 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc90003927d40 EFLAGS: 00010292
RAX: 27389ec23ba5e200 RBX: ffffffff8b0c00a0 RCX: 0000000000080000
RDX: ffffc9000eed4000 RSI: 000000000001e163 RDI: 000000000001e164
RBP: ffffc90003927e10 R08: ffffffff815291ce R09: fffff52000724f09
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff888077e9cac8 R14: 1ffff92000724fb0 R15: dffffc0000000000
FS:  00007f27a9c4e6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2da19ff8 CR3: 0000000020f5f000 CR4: 00000000003506f0
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_mkdirat+0x278/0x360 fs/namei.c:4134
 __do_sys_mkdirat fs/namei.c:4146 [inline]
 __se_sys_mkdirat fs/namei.c:4144 [inline]
 __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4144
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f27a8d8e169
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:00007f27a9c4e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f27a8fb6080 RCX: 00007f27a8d8e169
RDX: 0000000000000000 RSI: 0000200000000400 RDI: ffffffffffffff9c
RBP: 00007f27a8e10a68 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f27a8fb6080 R15: 00007ffe6fadcbd8
 </TASK>

Crashes (16):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/04/23 00:37 linux-6.1.y 420102835862 53a8b9bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in do_mkdirat
2025/04/03 17:54 linux-6.1.y 8e60a714ba3b 996a9618 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in do_mkdirat
2025/03/22 09:43 linux-6.1.y 344a09659766 c6512ef7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in do_mkdirat
2025/03/12 01:13 linux-6.1.y 6ae7ac5c4251 ee70e6db .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in do_mkdirat
2025/03/09 02:03 linux-6.1.y 6ae7ac5c4251 163f510d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in do_mkdirat
2025/03/09 02:00 linux-6.1.y 6ae7ac5c4251 163f510d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in do_mkdirat
2025/03/08 17:04 linux-6.1.y 6ae7ac5c4251 7e3bd60d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in do_mkdirat
2025/02/14 08:41 linux-6.1.y 0cbb5f65e52f d9a046cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in do_mkdirat
2025/04/12 16:53 linux-6.1.y 420102835862 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in do_mkdirat
2025/04/05 06:40 linux-6.1.y 8e60a714ba3b c53ea9c9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in do_mkdirat
2025/04/02 10:07 linux-6.1.y 8e60a714ba3b c799dfdd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in do_mkdirat
2025/03/29 21:16 linux-6.1.y 8e60a714ba3b d3999433 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in do_mkdirat
2025/03/25 06:23 linux-6.1.y 344a09659766 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in do_mkdirat
2025/03/17 11:26 linux-6.1.y 344a09659766 948c34e4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in do_mkdirat
2025/03/16 23:04 linux-6.1.y 344a09659766 e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in do_mkdirat
2025/02/20 06:54 linux-6.1.y 0cbb5f65e52f 50668798 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in do_mkdirat
* Struck through repros no longer work on HEAD.