syzbot


WARNING in nilfs_sufile_set_segment_usage

Status: upstream: reported C repro on 2023/03/02 13:59
Reported-by: syzbot+9f644a2fe13c164a4d3a@syzkaller.appspotmail.com
First crash: 472d, last: 472d
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in nilfs_sufile_set_segment_usage C error 2 356d 462d 0/3 auto-obsoleted due to no activity on 2023/12/21 09:47
upstream WARNING in nilfs_sufile_set_segment_usage nilfs C inconclusive 341 207d 625d 25/27 fixed on 2024/01/20 21:18
linux-6.1 WARNING in nilfs_sufile_set_segment_usage origin:upstream C done 4 215d 462d 3/3 fixed on 2023/12/18 16:47

Sample crash report:
NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
audit: type=1800 audit(1677765458.425:2): pid=7967 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor149" name="bus" dev="loop0" ino=18 res=0
------------[ cut here ]------------
WARNING: CPU: 1 PID: 7994 at fs/nilfs2/sufile.c:551 nilfs_sufile_set_segment_usage+0x461/0x5f0 fs/nilfs2/sufile.c:551
Kernel panic - not syncing: kernel: panic_on_warn set ...

CPU: 1 PID: 7994 Comm: segctord Not tainted 4.14.307-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 panic+0x21d/0x451 kernel/panic.c:247
 check_panic_on_warn.cold+0x19/0x35 kernel/panic.c:171
 __warn+0xdf/0x1e0 kernel/panic.c:603
 report_bug+0x208/0x250 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:967
RIP: 0010:nilfs_sufile_set_segment_usage+0x461/0x5f0 fs/nilfs2/sufile.c:551
RSP: 0018:ffff8880b3d57af8 EFLAGS: 00010297
RAX: ffff8880b363e4c0 RBX: ffff88808cf91200 RCX: ffff8880a893d000
RDX: 0000000000000000 RSI: 1ffff11014446f51 RDI: ffff8880a893d06c
RBP: ffff8880a893d060 R08: ffff8880a2237a00 R09: 0000000000000000
R10: 0000000000000000 R11: ffff8880b363e4c0 R12: 0000000000000000
R13: 1ffff110167aaf64 R14: ffff88808cf915b0 R15: 000000006400ab52
 nilfs_segctor_update_segusage fs/nilfs2/segment.c:1460 [inline]
 nilfs_segctor_do_construct+0x1c82/0x79c0 fs/nilfs2/segment.c:2084
 nilfs_segctor_construct+0x6db/0x8e0 fs/nilfs2/segment.c:2394
 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2502 [inline]
 nilfs_segctor_thread+0x3ad/0xdb0 fs/nilfs2/segment.c:2586
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/03/02 13:59 linux-4.14.y 7878a41b6cc1 f8902b57 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-4-14 WARNING in nilfs_sufile_set_segment_usage
* Struck through repros no longer work on HEAD.