syzbot


BUG: spinlock bad magic in writeback_single_inode

Status: auto-obsoleted due to no activity on 2023/07/07 00:38
Subsystems: ntfs3
[Documentation on labels]
Reported-by: syzbot+7b2e428bac8cb2ca2f49@syzkaller.appspotmail.com
First crash: 478d, last: 410d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] BUG: spinlock bad magic in writeback_single_inode 0 (2) 2022/12/07 12:38
Last patch testing requests (7)
Created Duration User Patch Repo Result
2023/07/06 23:51 24m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci OK log
2023/07/06 23:51 22m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci OK log
2023/04/27 23:52 20m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci OK log
2023/04/27 22:50 20m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci OK log
2023/04/27 22:50 12m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci error OK
2023/04/27 22:50 23m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log
2023/04/27 22:50 22m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci OK log

Sample crash report:
loop3: detected capacity change from 0 to 4096
ntfs3: loop3: Different NTFS' sector size (1024) and media sector size (512)
BUG: spinlock bad magic on CPU#1, syz-executor406/12278
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000470
Mem abort info:
  ESR = 0x0000000096000006
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000006
  CM = 0, WnR = 0
user pgtable: 4k pages, 48-bit VAs, pgdp=0000000111fd4000
[0000000000000470] pgd=0800000112c3a003, p4d=0800000112c3a003, pud=0800000111fb7003, pmd=0000000000000000
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 12278 Comm: syz-executor406 Not tainted 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022
pstate: a0400005 (NzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : task_pid_nr include/linux/sched.h:1568 [inline]
pc : spin_dump kernel/locking/spinlock_debug.c:63 [inline]
pc : spin_bug+0x88/0xec kernel/locking/spinlock_debug.c:77
lr : spin_dump kernel/locking/spinlock_debug.c:60 [inline]
lr : spin_bug+0x68/0xec kernel/locking/spinlock_debug.c:77
sp : ffff800016053940
x29: ffff800016053940 x28: 0000000000000000 x27: 0000000000000a00
x26: 0000000000000010 x25: 0000000000000000 x24: 0000000000000001
x23: 0000000000000001 x22: ffff800016053a60 x21: ffffffffffffff00
x20: ffff80000cc04981 x19: ffff0000cff0ea6f x18: 0000000000000387
x17: ffff80000c0cd83c x16: 0000000000000002 x15: 0000000000000000
x14: 0000000000000000 x13: 205d383732323154 x12: 5b5d303535323234
x11: ff808000081c4d64 x10: 0000000000000000 x9 : 35577adde7ee3200
x8 : ffffffffffffff01 x7 : 545b5d3035353232 x6 : ffff80000c091ebc
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 00000000ad4ead00 x1 : 0000000000000001 x0 : 0000000000000037
Call trace:
 spin_bug+0x88/0xec kernel/locking/spinlock_debug.c:77
 debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline]
 do_raw_spin_lock+0xb0/0x110 kernel/locking/spinlock_debug.c:114
 __raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline]
 _raw_spin_lock+0x5c/0x6c kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:350 [inline]
 writeback_single_inode+0x44/0x3dc fs/fs-writeback.c:1676
 write_inode_now+0xb0/0xdc fs/fs-writeback.c:2744
 iput_final fs/inode.c:1734 [inline]
 iput+0x1e4/0x324 fs/inode.c:1773
 ntfs_fill_super+0x1254/0x14a4 fs/ntfs3/super.c:1190
 get_tree_bdev+0x1e8/0x2a0 fs/super.c:1324
 ntfs_fs_get_tree+0x28/0x38 fs/ntfs3/super.c:1358
 vfs_get_tree+0x40/0x140 fs/super.c:1531
 do_new_mount+0x1dc/0x4e4 fs/namespace.c:3040
 path_mount+0x358/0x890 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount fs/namespace.c:3568 [inline]
 __arm64_sys_mount+0x2c4/0x3c4 fs/namespace.c:3568
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall arch/arm64/kernel/syscall.c:52 [inline]
 el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x48/0x140 arch/arm64/kernel/syscall.c:197
 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584
Code: 900259c3 12800004 9120cc63 14000003 (b94572a4) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	900259c3 	adrp	x3, 0x4b38000
   4:	12800004 	mov	w4, #0xffffffff            	// #-1
   8:	9120cc63 	add	x3, x3, #0x833
   c:	14000003 	b	0x18
* 10:	b94572a4 	ldr	w4, [x21, #1392] <-- trapping instruction

Crashes (7):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/12/07 12:37 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a5541c0811a0 d88f3abb .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci-upstream-gce-arm64 BUG: spinlock bad magic in writeback_single_inode
2022/12/18 09:35 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a5541c0811a0 05494336 .config console log report syz [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 BUG: spinlock bad magic in writeback_single_inode
2022/12/07 18:16 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a5541c0811a0 d88f3abb .config console log report syz [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 BUG: spinlock bad magic in writeback_single_inode
2022/11/10 10:01 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 1621b6eaebf7 b2488a87 .config console log report syz [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 BUG: spinlock bad magic in writeback_single_inode
2023/01/17 22:27 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9598c377d828 aedf5331 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: spinlock bad magic in writeback_single_inode
2022/11/22 08:04 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a77d28d13789 1c576c23 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: spinlock bad magic in writeback_single_inode
2022/11/10 09:45 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 1621b6eaebf7 b2488a87 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: spinlock bad magic in writeback_single_inode
* Struck through repros no longer work on HEAD.