syzbot


WARNING in chmod_common

Status: moderation: reported on 2024/04/10 20:36
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+bbb9d5b495ce96ca8018@syzkaller.appspotmail.com
First crash: 44d, last: 20d

Sample crash report:
WARNING: CPU: 0 PID: 28469 at kernel/locking/rwsem.c:1370 __up_write kernel/locking/rwsem.c:1369 [inline]
WARNING: CPU: 0 PID: 28469 at kernel/locking/rwsem.c:1370 up_write+0x502/0x590 kernel/locking/rwsem.c:1632
Modules linked in:
CPU: 0 PID: 28469 Comm: syz-executor.2 Not tainted 6.9.0-rc6-syzkaller-00046-g18daea77cca6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:__up_write kernel/locking/rwsem.c:1369 [inline]
RIP: 0010:up_write+0x502/0x590 kernel/locking/rwsem.c:1632
Code: c7 c7 20 ac ca 8b 48 c7 c6 a0 ae ca 8b 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 73 b3 e6 ff 48 83 c4 08 90 <0f> 0b 90 90 e9 6a fd ff ff 48 c7 c1 c0 2c a9 8f 80 e1 07 80 c1 03
RSP: 0018:ffffc90004fbfbe0 EFLAGS: 00010292
RAX: 6293e1641141da00 RBX: ffffffff8bcaad00 RCX: 0000000000040000
RDX: ffffc9000e84b000 RSI: 000000000001ffba RDI: 000000000001ffbb
RBP: ffffc90004fbfcb0 R08: ffffffff81589072 R09: fffffbfff1c39b58
R10: dffffc0000000000 R11: fffffbfff1c39b58 R12: 0000000000000000
R13: ffff8880590e36a0 R14: 1ffff920009f7f84 R15: dffffc0000000000
FS:  00007fa7ccfde6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001200 CR3: 000000002d5e6000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 inode_unlock include/linux/fs.h:800 [inline]
 chmod_common+0x2b8/0x4c0 fs/open.c:653
 do_fchmodat fs/open.c:698 [inline]
 __do_sys_chmod fs/open.c:722 [inline]
 __se_sys_chmod fs/open.c:720 [inline]
 __x64_sys_chmod+0x100/0x1b0 fs/open.c:720
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa7cd47dea9
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:00007fa7ccfde0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000005a
RAX: ffffffffffffffda RBX: 00007fa7cd5ac050 RCX: 00007fa7cd47dea9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000940
RBP: 00007fa7cd4ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fa7cd5ac050 R15: 00007fff1bbabdc8
 </TASK>

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/01 13:14 upstream 18daea77cca6 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in chmod_common
2024/04/23 02:41 upstream 4d2008430ce8 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in chmod_common
2024/04/23 02:38 upstream a2c63a3f3d68 36c961ad .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in chmod_common
2024/04/06 20:33 upstream fe46a7dd189e ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in chmod_common
2024/04/30 16:45 linux-next d04466706db5 9e0e6af1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in chmod_common
* Struck through repros no longer work on HEAD.