syzbot


BUG: unable to handle kernel paging request in xlog_cil_push_work

Status: moderation: reported on 2025/01/08 21:57
Subsystems: xfs
[Documentation on labels]
Reported-by: syzbot+692770e039a014d3b919@syzkaller.appspotmail.com
First crash: 100d, last: 26d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: slab-out-of-bounds Write in xlog_cil_push_work xfs 3 310d 316d 0/28 auto-obsoleted due to no activity on 2024/09/06 14:39

Sample crash report:
Unable to handle kernel paging request at virtual address 001f7fe0001abb51
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
[001f7fe0001abb51] address between user and kernel address ranges
Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 UID: 0 PID: 12 Comm: kworker/u8:0 Not tainted 6.14.0-rc7-syzkaller-gb5737d35364f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: xfs-cil/loop1 xlog_cil_push_work
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : xlog_cil_build_lv_chain fs/xfs/xfs_log_cil.c:1245 [inline]
pc : xlog_cil_push_work+0xb68/0x25d4 fs/xfs/xfs_log_cil.c:1381
lr : generic_test_bit include/asm-generic/bitops/generic-non-atomic.h:128 [inline]
lr : xlog_cil_build_lv_chain fs/xfs/xfs_log_cil.c:1238 [inline]
lr : xlog_cil_push_work+0xb1c/0x25d4 fs/xfs/xfs_log_cil.c:1381
sp : ffff800097d476e0
x29: ffff800097d47a20 x28: ffff0000db7b5c19 x27: 00ffff0000d5da7c
x26: ffff0000ce2940b0 x25: ffff800097d479d0 x24: dfff800000000000
x23: ffff0000db7b5bf1 x22: 1fffe0001b6f6b83 x21: ffff0000db7b5c01
x20: ffff0000db7b5bc9 x19: dfff800000000000 x18: 0000000000004000
x17: ffff80008fbbd000 x16: ffff8000803b975c x15: 0000000000000001
x14: 1fffe0001a69c720 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000001 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : 001fffe0001abb51 x7 : ffff800081f89378 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800080482fd8
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 00ffff0000d5da8c
Call trace:
 xlog_cil_build_lv_chain fs/xfs/xfs_log_cil.c:1245 [inline] (P)
 xlog_cil_push_work+0xb68/0x25d4 fs/xfs/xfs_log_cil.c:1381 (P)
 process_one_work+0x810/0x1638 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x97c/0xeec kernel/workqueue.c:3400
 kthread+0x65c/0x7b0 kernel/kthread.c:464
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862
Code: 91004360 d2d00013 d343fc08 f2fbfff3 (38f86908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	91004360 	add	x0, x27, #0x10
   4:	d2d00013 	mov	x19, #0x800000000000        	// #140737488355328
   8:	d343fc08 	lsr	x8, x0, #3
   c:	f2fbfff3 	movk	x19, #0xdfff, lsl #48
* 10:	38f86908 	ldrsb	w8, [x8, x24] <-- trapping instruction

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/03/19 22:08 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci b5737d35364f 3b7445cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in xlog_cil_push_work
2025/02/28 15:15 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 017f704fbfb1 1e7a43e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in xlog_cil_push_work
2025/01/25 13:56 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 1950a0af2d55 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in xlog_cil_push_work
2025/01/04 21:54 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 573067a5a685 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in xlog_cil_push_work
* Struck through repros no longer work on HEAD.