syzbot


WARNING in iterate_dir

Status: upstream: reported on 2024/04/09 23:40
Reported-by: syzbot+0b2ccd791eecca9e49aa@syzkaller.appspotmail.com
First crash: 75d, last: 75d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in iterate_dir fs 1 496d 492d 0/27 auto-obsoleted due to no activity on 2023/05/15 02:07
linux-5.15 WARNING in iterate_dir 1 271d 271d 0/3 auto-obsoleted due to no activity on 2024/01/05 15:25

Sample crash report:
WARNING: CPU: 1 PID: 7120 at kernel/locking/rwsem.c:1345 __up_read+0x5fe/0x690 kernel/locking/rwsem.c:1345
Modules linked in:
CPU: 1 PID: 7120 Comm: syz-executor.4 Not tainted 6.1.84-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:__up_read+0x5fe/0x690 kernel/locking/rwsem.c:1345
Code: eb 8a 48 0f 44 c1 48 c7 c7 60 e2 eb 8a 48 c7 c6 00 e3 eb 8a 4c 89 fa 4c 89 f1 49 89 d8 4d 89 e9 50 e8 26 db e8 ff 48 83 c4 08 <0f> 0b 48 bb 00 00 00 00 00 fc ff df 4c 8b 2c 24 e9 4e fb ff ff 48
RSP: 0018:ffffc9000c33fcc0 EFLAGS: 00010296
RAX: 8e54f507700d8400 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc9000bd1b000 RSI: 0000000000028286 RDI: 0000000000028287
RBP: ffffc9000c33fd68 R08: ffffffff81527eae R09: fffffbfff2093059
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88805021cb20
R13: ffff88804c51bb80 R14: ffff88805021cac8 R15: 0000000000000000
FS:  00007f85903cc6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3212a000 CR3: 0000000072abf000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_unlock_shared include/linux/fs.h:773 [inline]
 iterate_dir+0x4ac/0x560 fs/readdir.c:73
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64+0x209/0x4f0 fs/readdir.c:354
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f858f67de69
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:00007f85903cc0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f858f7ac050 RCX: 00007f858f67de69
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f858f6ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f858f7ac050 R15: 00007ffe87a13a78
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/04/09 23:40 linux-6.1.y 347385861c50 171ec371 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in iterate_dir
* Struck through repros no longer work on HEAD.