WARNING: lock held when returning to user space in __ocfs2_flush_truncate_log (2)

Status: upstream: reported on 2026/02/27 21:45
Reported-by: syzbot+8de411ce7790770fb427@syzkaller.appspotmail.com
First crash: 148d, last: 4d06h
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING: lock held when returning to user space in __ocfs2_flush_truncate_log 4 4 362d 362d 0/3 auto-obsoleted due to no activity on 2025/11/05 02:15

Sample crash report:
(syz.4.6,4278,1):ocfs2_write_begin_nolock:1878 ERROR: status = -30
(syz.4.6,4278,0):ocfs2_dio_end_io:2443 ERROR: Direct IO failed, bytes = -5
================================================
WARNING: lock held when returning to user space!
syzkaller #0 Not tainted
------------------------------------------------
syz.4.6/4278 is leaving the kernel with locks still held!
3 locks held by syz.4.6/4278:
 #0: ffff888079ff2650 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5938 [inline]
 #0: ffff888079ff2650 (sb_internal#2){.+.+}-{0:0}, at: __ocfs2_flush_truncate_log+0x49f/0x1110 fs/ocfs2/alloc.c:6052
 #1: ffff88805c4c80e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x3a6/0x6f0 fs/ocfs2/journal.c:374
 #2: ffff88807bb2e990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x12d5/0x1560 fs/jbd2/transaction.c:462

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/07/21 19:15 linux-5.15.y c86c4726e7f0 7c5de9c3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: lock held when returning to user space in __ocfs2_flush_truncate_log
2026/07/21 19:13 linux-5.15.y c86c4726e7f0 7c5de9c3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: lock held when returning to user space in __ocfs2_flush_truncate_log
2026/07/21 19:10 linux-5.15.y c86c4726e7f0 7c5de9c3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: lock held when returning to user space in __ocfs2_flush_truncate_log
2026/06/01 00:46 linux-5.15.y 241d66fa280c 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: lock held when returning to user space in __ocfs2_flush_truncate_log
2026/02/27 21:44 linux-5.15.y 3330a8d33e08 2cf092b8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: lock held when returning to user space in __ocfs2_flush_truncate_log
* Struck through repros no longer work on HEAD.