syzbot


WARNING in do_symlinkat (2)

Status: auto-obsoleted due to no activity on 2024/10/05 04:07
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+cba2e1e7c98e2bcd7619@syzkaller.appspotmail.com
First crash: 415d, last: 368d
Bug presence (2)
Date Name Commit Repro Result
2023/10/03 linux-5.15.y (ToT) b911329317b4 C [report] WARNING in do_symlinkat
2023/10/03 upstream (ToT) ce36c8b14987 C Didn't crash
Similar bugs (5)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in do_symlinkat 2 408d 439d 0/3 auto-obsoleted due to no activity on 2024/01/17 15:16
linux-6.1 WARNING in do_symlinkat (2) 4 33d 140d 0/3 upstream: reported on 2024/07/04 06:01
linux-5.15 WARNING in do_symlinkat 1 539d 539d 0/3 auto-obsoleted due to no activity on 2023/09/09 00:28
upstream WARNING in do_symlinkat ntfs3 C error done 66 535d 700d 22/28 fixed on 2023/06/08 14:41
upstream WARNING in do_symlinkat (2) ntfs3 C error unreliable 28 6d02h 459d 0/28 upstream: reported C repro on 2023/08/19 10:47
Last patch testing requests (1)
Created Duration User Patch Repo Result
2024/10/05 03:49 16m retest repro linux-5.15.y OK log
Fix bisection attempts (2)
Created Duration User Patch Repo Result
2024/01/29 01:04 2h33m fix candidate upstream OK (0) job log
2023/12/14 16:31 20m fix candidate upstream error job log

Sample crash report:
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff8880ad10dbb0, owner = 0x0, curr 0xffff888018ab0000, list empty
WARNING: CPU: 0 PID: 9478 at kernel/locking/rwsem.c:1342 __up_write kernel/locking/rwsem.c:1341 [inline]
WARNING: CPU: 0 PID: 9478 at kernel/locking/rwsem.c:1342 up_write+0x473/0x4d0 kernel/locking/rwsem.c:1594
Modules linked in:
CPU: 0 PID: 9478 Comm: syz-executor.3 Not tainted 5.15.138-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:__up_write kernel/locking/rwsem.c:1341 [inline]
RIP: 0010:up_write+0x473/0x4d0 kernel/locking/rwsem.c:1594
Code: 48 c7 c7 60 ff 8a 8a 48 c7 c6 20 02 8b 8a 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 01 14 ea ff 48 83 c4 08 <0f> 0b e9 86 fd ff ff 48 c7 c1 c8 c6 e3 8d 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc900041dfd40 EFLAGS: 00010292
RAX: da90bd6288828800 RBX: ffffffff8a8b0040 RCX: 0000000000040000
RDX: ffffc90005f49000 RSI: 000000000001889a RDI: 000000000001889b
RBP: ffffc900041dfe10 R08: ffffffff816658fc R09: ffffed10173467a8
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff8880ad10dbb0 R14: 1ffff9200083bfb0 R15: dffffc0000000000
FS:  00007fa75372e6c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff45bd22198 CR3: 000000001f970000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_unlock include/linux/fs.h:792 [inline]
 done_path_create fs/namei.c:3815 [inline]
 do_symlinkat+0x25a/0x600 fs/namei.c:4390
 __do_sys_symlink fs/namei.c:4409 [inline]
 __se_sys_symlink fs/namei.c:4407 [inline]
 __x64_sys_symlink+0x7a/0x90 fs/namei.c:4407
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fa7551cdae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa75372e0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 00007fa7552ed050 RCX: 00007fa7551cdae9
RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000020000100
RBP: 00007fa75521947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fa7552ed050 R15: 00007ffe57292698
 </TASK>

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/11/18 17:31 linux-5.15.y 80529b4968a8 cb976f63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in do_symlinkat
2023/10/31 12:08 linux-5.15.y 12952a23a5da 58499c95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in do_symlinkat
2023/10/02 23:47 linux-5.15.y b911329317b4 50b20e75 .config console log report syz [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in do_symlinkat
2023/10/02 19:24 linux-5.15.y b911329317b4 50b20e75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in do_symlinkat
* Struck through repros no longer work on HEAD.