syzbot


WARNING in do_mknodat (2)

Status: moderation: reported on 2023/02/22 20:34
Labels: fs (incorrect?)
Reported-by: syzbot+425ea1b4fb977d479731@syzkaller.appspotmail.com
First crash: 109d, last: 44d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in do_mknodat 1 167d 112d 0/24 closed as invalid on 2023/02/16 16:02

Sample crash report:
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff88803051f1d0, owner = 0x0, curr 0xffff88802e8b8000, list empty
WARNING: CPU: 1 PID: 9679 at kernel/locking/rwsem.c:1370 __up_write kernel/locking/rwsem.c:1369 [inline]
WARNING: CPU: 1 PID: 9679 at kernel/locking/rwsem.c:1370 up_write+0x4f4/0x580 kernel/locking/rwsem.c:1626
Modules linked in:
CPU: 1 PID: 9679 Comm: syz-executor.4 Not tainted 6.3.0-syzkaller-00113-g1a0beef98b58 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
RIP: 0010:__up_write kernel/locking/rwsem.c:1369 [inline]
RIP: 0010:up_write+0x4f4/0x580 kernel/locking/rwsem.c:1626
Code: 48 c7 c7 e0 71 ea 8a 48 c7 c6 20 74 ea 8a 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 b0 f5 e8 ff 48 83 c4 08 <0f> 0b e9 75 fd ff ff 48 c7 c1 28 80 53 8e 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc9000b597d40 EFLAGS: 00010292
RAX: f7e4b8a22365c800 RBX: ffffffff8aea72c0 RCX: 0000000000040000
RDX: ffffc9000da6b000 RSI: 000000000003253d RDI: 000000000003253e
RBP: ffffc9000b597e10 R08: ffffffff81528022 R09: fffffbfff205b85c
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff88803051f1d0 R14: 1ffff920016b2fb0 R15: dffffc0000000000
FS:  00007f0da4671700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5c573fe000 CR3: 000000002b7f2000 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:3858 [inline]
 do_mknodat+0x482/0x6e0 fs/namei.c:3981
 __do_sys_mknod fs/namei.c:3999 [inline]
 __se_sys_mknod fs/namei.c:3997 [inline]
 __x64_sys_mknod+0x8e/0xa0 fs/namei.c:3997
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f0da388c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0da4671168 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 00007f0da39ac120 RCX: 00007f0da388c169
RDX: 0000000000000709 RSI: 0000000000006000 RDI: 0000000020000100
RBP: 00007f0da38e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe6acafaff R14: 00007f0da4671300 R15: 0000000000022000
 </TASK>

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Manager Title
2023/04/25 05:03 upstream 1a0beef98b58 65320f8e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in do_mknodat
2023/02/18 20:23 upstream 38f8ccde04a3 d02e9a70 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in do_mknodat
* Struck through repros no longer work on HEAD.