syzbot


WARNING in __generic_file_fsync

Status: auto-obsoleted due to no activity on 2023/05/24 22:02
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+1162ce19c45d08ecdb2e@syzkaller.appspotmail.com
First crash: 450d, last: 450d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in __generic_file_fsync 1 381d 381d 0/3 auto-obsoleted due to no activity on 2023/08/23 09:03
linux-5.15 WARNING in __generic_file_fsync (2) 1 134d 130d 0/3 auto-obsoleted due to no activity on 2024/04/15 05:26

Sample crash report:
------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff88803f4d71d0, owner = 0x0, curr 0xffff88801eaf8000, list empty
WARNING: CPU: 0 PID: 6379 at kernel/locking/rwsem.c:1369 __up_write kernel/locking/rwsem.c:1369 [inline]
WARNING: CPU: 0 PID: 6379 at kernel/locking/rwsem.c:1369 up_write+0x425/0x520 kernel/locking/rwsem.c:1626
Modules linked in:
CPU: 0 PID: 6379 Comm: syz-executor.4 Not tainted 6.2.0-syzkaller-08237-ga5c95ca18a98 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
RIP: 0010:__up_write kernel/locking/rwsem.c:1369 [inline]
RIP: 0010:up_write+0x425/0x520 kernel/locking/rwsem.c:1626
Code: 3c 02 00 0f 85 da 00 00 00 48 8b 55 00 4d 89 f1 53 4d 89 f8 4c 89 e9 48 c7 c6 20 52 4c 8a 48 c7 c7 60 50 4c 8a e8 8b 96 e7 ff <0f> 0b 59 e9 dd fc ff ff 48 89 df e8 5b c6 71 00 e9 1a fc ff ff 48
RSP: 0018:ffffc900066ffe60 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffffffff8a4c4fa0 RCX: ffffc9000f042000
RDX: 0000000000040000 RSI: ffffffff814c2c17 RDI: 0000000000000001
RBP: ffff88803f4d71d0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88803f4d71d8
R13: ffff88803f4d71d0 R14: ffff88801eaf8000 R15: 0000000000000000
FS:  00007f01dee40700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc3b9c6bf8 CR3: 000000007636a000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 inode_unlock include/linux/fs.h:761 [inline]
 __generic_file_fsync+0x184/0x1f0 fs/libfs.c:1148
 generic_file_fsync+0x77/0x120 fs/libfs.c:1173
 vfs_fsync_range fs/sync.c:188 [inline]
 vfs_fsync fs/sync.c:202 [inline]
 do_fsync fs/sync.c:212 [inline]
 __do_sys_fdatasync fs/sync.c:225 [inline]
 __se_sys_fdatasync fs/sync.c:223 [inline]
 __x64_sys_fdatasync+0xc9/0x140 fs/sync.c:223
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f01de08c0f9
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:00007f01dee40168 EFLAGS: 00000246 ORIG_RAX: 000000000000004b
RAX: ffffffffffffffda RBX: 00007f01de1ac050 RCX: 00007f01de08c0f9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007f01de0e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd64fbbe2f R14: 00007f01dee40300 R15: 0000000000022000
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/02/23 22:01 upstream a5c95ca18a98 9e2ebb3c .config console log report info ci-upstream-kasan-gce-root WARNING in __generic_file_fsync
* Struck through repros no longer work on HEAD.