syzbot


BUG: unable to handle kernel paging request in xlog_bio_end_io (2)

Status: moderation: reported on 2025/03/25 23:39
Subsystems: xfs
[Documentation on labels]
Reported-by: syzbot+d290f3869712bf0c5113@syzkaller.appspotmail.com
First crash: 12d, last: 12d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream BUG: unable to handle kernel paging request in xlog_bio_end_io xfs 1 106d 102d 0/28 auto-obsoleted due to no activity on 2025/03/17 02:47

Sample crash report:
Unable to handle kernel paging request at virtual address 001f7fe000366f45
Mem abort info:
  ESR = 0x0000000096000004
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x04: level 0 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[001f7fe000366f45] address between user and kernel address ranges
Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 UID: 0 PID: 17 Comm: ksoftirqd/0 Not tainted 6.14.0-rc7-syzkaller-ga2392f333575 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __lock_acquire+0xfc/0x7904 kernel/locking/lockdep.c:5091
lr : lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5851
sp : ffff800097d97260
x29: ffff800097d97520 x28: ffff800080363e98 x27: 0000000000000000
x26: ffff0001b378c540 x25: 0000000000000000 x24: 0000000000000001
x23: 0000000000000000 x22: 1ffff00011f780cd x21: 00ffff0001b37a2b
x20: 0000000000000001 x19: 0000000000000000 x18: 1fffe000366f1886
x17: ffff80008fbbd000 x16: ffff8000832b7b9c x15: 0000000000000001
x14: 1fffe0001a938b2d x13: dfff800000000000 x12: ffff700012fb2e74
x11: ffff80008046cfd0 x10: ffff80008fbc0668 x9 : 00000000000000f3
x8 : 001fffe000366f45 x7 : ffff800080363e98 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 00ffff0001b37a2b
Call trace:
 __lock_acquire+0xfc/0x7904 kernel/locking/lockdep.c:5091 (P)
 lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5851
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x48/0x60 kernel/locking/spinlock.c:154
 __queue_work+0x8d4/0x1324
 queue_work_on+0xe0/0x1a0 kernel/workqueue.c:2392
 queue_work include/linux/workqueue.h:662 [inline]
 xlog_bio_end_io+0x84/0x98 fs/xfs/xfs_log.c:1605
 bio_endio+0x840/0x87c block/bio.c:1548
 blk_update_request+0x4ac/0xda0 block/blk-mq.c:983
 blk_mq_end_request+0x54/0x88 block/blk-mq.c:1145
 blk_flush_complete_seq+0x58c/0xaf4 block/blk-flush.c:191
 flush_end_io+0x9f0/0xd68 block/blk-flush.c:250
 __blk_mq_end_request+0x3b4/0x558 block/blk-mq.c:1135
 blk_mq_end_request+0x68/0x88 block/blk-mq.c:1147
 lo_complete_rq+0x188/0x2f4 drivers/block/loop.c:395
 blk_complete_reqs block/blk-mq.c:1220 [inline]
 blk_done_softirq+0x11c/0x168 block/blk-mq.c:1225
 handle_softirqs+0x320/0xd34 kernel/softirq.c:561
 run_ksoftirqd+0x70/0xc0 kernel/softirq.c:950
 smpboot_thread_fn+0x4b0/0x90c kernel/smpboot.c:164
 kthread+0x65c/0x7b0 kernel/kthread.c:464
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862
Code: f007ba88 b9466908 340090a8 d343fea8 (386d6908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	f007ba88 	adrp	x8, 0xf753000
   4:	b9466908 	ldr	w8, [x8, #1640]
   8:	340090a8 	cbz	w8, 0x121c
   c:	d343fea8 	lsr	x8, x21, #3
* 10:	386d6908 	ldrb	w8, [x8, x13] <-- trapping instruction

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/03/21 23:29 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a2392f333575 62330552 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in xlog_bio_end_io
* Struck through repros no longer work on HEAD.