syzbot


BUG: unable to handle kernel paging request in btrfs_stop_all_workers

Status: upstream: reported on 2024/11/13 15:32
Subsystems: btrfs
[Documentation on labels]
Reported-by: syzbot+828d8ee1e5e42c37d573@syzkaller.appspotmail.com
First crash: 24d, last: 18h40m
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [btrfs?] BUG: unable to handle kernel paging request in btrfs_stop_all_workers 0 (1) 2024/11/13 15:32
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in btrfs_stop_all_workers (2) btrfs 307 143d 187d 26/28 fixed on 2024/07/31 03:12
upstream general protection fault in btrfs_stop_all_workers btrfs C done 554 930d 935d 22/28 fixed on 2023/02/24 13:50

Sample crash report:
Unable to handle kernel paging request at virtual address edff9fffe0001824
KASAN: maybe wild-memory-access in range [0x7000ffff0000c120-0x7000ffff0000c127]
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
[edff9fffe0001824] address between user and kernel address ranges
Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 UID: 0 PID: 6429 Comm: syz-executor Not tainted 6.12.0-rc7-syzkaller-g887407160d72 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __lock_acquire+0xfc/0x77c8 kernel/locking/lockdep.c:5065
lr : lock_acquire+0x240/0x728 kernel/locking/lockdep.c:5825
sp : ffff8000a39f7440
x29: ffff8000a39f7700 x28: ffff80008025d2e8 x27: 0000000000000000
x26: ffff0001b365a4c0 x25: 0000000000000000 x24: 0000000000000001
x23: 0000000000000000 x22: 1ffff00011f020ba x21: 7000ffff0000c120
x20: 0000000000000001 x19: 0000000000000000 x18: ffff8000a33774e0
x17: 000000000001fa85 x16: ffff8000830ce3b0 x15: 0000000000000001
x14: 1fffe00018211000 x13: dfff800000000000 x12: ffff70001473eeb0
x11: ffff800080359554 x10: ffff80008f8105d4 x9 : 00000000000000f3
x8 : 0e001fffe0001824 x7 : ffff80008025d2e8 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 7000ffff0000c120
Call trace:
 __lock_acquire+0xfc/0x77c8 kernel/locking/lockdep.c:5065 (P)
 lock_acquire+0x240/0x728 kernel/locking/lockdep.c:5825 (L)
 lock_acquire+0x240/0x728 kernel/locking/lockdep.c:5825
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
 _raw_spin_lock_irq+0x58/0x70 kernel/locking/spinlock.c:170
 put_pwq_unlocked kernel/workqueue.c:1662 [inline]
 destroy_workqueue+0x8d8/0xdc0 kernel/workqueue.c:5883
 btrfs_destroy_workqueue+0x48/0x308 fs/btrfs/async-thread.c:360
 btrfs_stop_all_workers+0x1a0/0x240 fs/btrfs/disk-io.c:1792
 close_ctree+0x598/0xb3c fs/btrfs/disk-io.c:4362
 btrfs_put_super+0x70/0x80 fs/btrfs/super.c:75
 generic_shutdown_super+0x12c/0x2bc fs/super.c:642
 kill_anon_super+0x4c/0x7c fs/super.c:1237
 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2114
 deactivate_locked_super+0xc4/0x12c fs/super.c:473
 deactivate_super+0xe0/0x100 fs/super.c:506
 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1373
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1380
 task_work_run+0x230/0x2e0 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151
 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline]
 el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
Code: f007a5a8 b945d508 34008c88 d343fea8 (386d6908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	f007a5a8 	adrp	x8, 0xf4b7000
   4:	b945d508 	ldr	w8, [x8, #1492]
   8:	34008c88 	cbz	w8, 0x1198
   c:	d343fea8 	lsr	x8, x21, #3
* 10:	386d6908 	ldrb	w8, [x8, x13] <-- trapping instruction

Crashes (7):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/11/17 07:00 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 887407160d72 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in btrfs_stop_all_workers
2024/11/14 04:08 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8e9a54d7181b a8c99394 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in btrfs_stop_all_workers
2024/11/13 15:31 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci baa007e8da32 62026c85 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in btrfs_stop_all_workers
2024/11/06 19:38 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8936d33c1f69 3a465482 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in btrfs_stop_all_workers
2024/11/02 13:17 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5283dc78f4da f00eed24 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in btrfs_stop_all_workers
2024/10/29 11:41 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 1bf329c696cf 66aeb999 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in btrfs_stop_all_workers
2024/10/25 00:34 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ce8e69898653 9fc8fe02 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in btrfs_stop_all_workers
* Struck through repros no longer work on HEAD.