[syzbot] WARNING in dbAllocBits

From: syzbot
Date: Sat Oct 01 2022 - 09:37:13 EST

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Hello,

syzbot found the following issue on:

HEAD commit: c194837ebb57 Merge branch 'for-next/core', remote-tracking..
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=12e45ca8880000
kernel config: https://syzkaller.appspot.com/x/.config?x=15a770deac0c935a
dashboard link: https://syzkaller.appspot.com/bug?extid=e6a47211665dce6af915
compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14632d40880000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=134260ec880000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/8d8ae425e7fa/disk-c194837e.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c540d501ebe7/vmlinux-c194837e.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e6a47211665dce6af915@xxxxxxxxxxxxxxxxxxxxxxxxx

loop0: detected capacity change from 0 to 32768
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(__owner_task(owner) != get_current())
WARNING: CPU: 1 PID: 3069 at kernel/locking/mutex.c:918 __mutex_unlock_slowpath+0xd8/0x1cc kernel/locking/mutex.c:918
Modules linked in:
CPU: 1 PID: 3069 Comm: syz-executor273 Not tainted 6.0.0-rc6-syzkaller-17742-gc194837ebb57 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __mutex_unlock_slowpath+0xd8/0x1cc kernel/locking/mutex.c:918
lr : __mutex_unlock_slowpath+0xd8/0x1cc kernel/locking/mutex.c:918
sp : ffff80000ff93670
x29: ffff80000ff93690 x28: ffff0000cd21e000 x27: 0000000000000001
x26: ffff80000d30c000 x25: ffff0000c68db500 x24: ffff80000ee2b000
x23: ffff80000cb54135 x22: ffff80000cb5415a x21: ffff80000cb4f56b
x20: ffff0000c68db4ff x19: ffff0000cb316450 x18: fffffffffffffff5
x17: ffff80000dd0b198 x16: 0000000000000000 x15: 0000000000000000
x14: 0000000000000000 x13: 0000000000000012 x12: ffff80000d5ef920
x11: ff808000081c1630 x10: 0000000000000000 x9 : b51a2818168f2500
x8 : b51a2818168f2500 x7 : 4e5241575f534b43 x6 : ffff800008195d30
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000100000000 x0 : 0000000000000039
Call trace:
__mutex_unlock_slowpath+0xd8/0x1cc kernel/locking/mutex.c:918
mutex_unlock+0x24/0x30 kernel/locking/mutex.c:543
dbAllocBits+0x364/0x3b0 fs/jfs/jfs_dmap.c:2225
dbAllocDmap+0x44/0xd0 fs/jfs/jfs_dmap.c:1999
dbAllocNext+0x280/0x290 fs/jfs/jfs_dmap.c:1152
dbAlloc+0x200/0x694 fs/jfs/jfs_dmap.c:786
extBalloc+0xd0/0x368 fs/jfs/jfs_extent.c:321
extAlloc+0x16c/0x384 fs/jfs/jfs_extent.c:122
jfs_get_block+0x1b4/0x3ec fs/jfs/inode.c:248
__block_write_begin_int+0x240/0x95c fs/buffer.c:2006
__block_write_begin fs/buffer.c:2056 [inline]
block_write_begin+0x74/0x14c fs/buffer.c:2117
jfs_write_begin+0x44/0x88 fs/jfs/inode.c:304
generic_perform_write+0xf0/0x2cc mm/filemap.c:3738
__generic_file_write_iter+0xd8/0x21c mm/filemap.c:3866
generic_file_write_iter+0x6c/0x168 mm/filemap.c:3898
call_write_iter include/linux/fs.h:2187 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x2dc/0x46c fs/read_write.c:578
ksys_write+0xb4/0x160 fs/read_write.c:631
__do_sys_write fs/read_write.c:643 [inline]
__se_sys_write fs/read_write.c:640 [inline]
__arm64_sys_write+0x24/0x34 fs/read_write.c:640
__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+0x48/0x164 arch/arm64/kernel/syscall.c:206
el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654
el0t_64_sync+0x18c/0x190
irq event stamp: 23765
hardirqs last enabled at (23765): [<ffff80000bfcbcdc>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
hardirqs last enabled at (23765): [<ffff80000bfcbcdc>] _raw_spin_unlock_irq+0x3c/0x70 kernel/locking/spinlock.c:202
hardirqs last disabled at (23764): [<ffff80000bfcbadc>] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline]
hardirqs last disabled at (23764): [<ffff80000bfcbadc>] _raw_spin_lock_irq+0x34/0x9c kernel/locking/spinlock.c:170
softirqs last enabled at (21988): [<ffff8000080102e4>] _stext+0x2e4/0x37c
softirqs last disabled at (21653): [<ffff800008017c14>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79
---[ end trace 0000000000000000 ]---
Unable to handle kernel paging request at virtual address ffff80000d272a70
Mem abort info:
ESR = 0x0000000096000047
EC = 0x25: DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
FSC = 0x07: level 3 translation fault
Data abort info:
ISV = 0, ISS = 0x00000047
CM = 0, WnR = 1
swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000001c566a000
[ffff80000d272a70] pgd=100000023ffff003, p4d=100000023ffff003, pud=100000023fffe003, pmd=100000023fffa003, pte=0000000000000000
Internal error: Oops: 0000000096000047 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 3069 Comm: syz-executor273 Tainted: G W 6.0.0-rc6-syzkaller-17742-gc194837ebb57 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : queued_spin_lock_slowpath+0x198/0x380 kernel/locking/qspinlock.c:474
lr : queued_spin_lock_slowpath+0x114/0x380 kernel/locking/qspinlock.c:405
sp : ffff80000ff935e0
x29: ffff80000ff935e0 x28: ffff0000cd21e000 x27: 0000000000000001
x26: ffff80000d30c000 x25: ffff0000c68db500 x24: ffff0001fefd0a40
x23: 0000000000000000 x22: ffff80000d30cf28 x21: ffff80000d272a40
x20: 0000000000000000 x19: ffff0000cb316458 x18: fffffffffffffff5
x17: ffff80000dd0b198 x16: 0000000000000000 x15: 0000000000000000
x14: 0000000000000000 x13: 000000000000ffff x12: 0000000000000000
x11: ffff80000d272a70 x10: 0000000000040000 x9 : ffff0001fefd0a48
x8 : ffff0001fefd0a40 x7 : 0000000000000000 x6 : ffff80000bfc55b8
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000001 x1 : ffff80000ce2689f x0 : 0000000000000001
Call trace:
decode_tail kernel/locking/qspinlock.c:131 [inline]
queued_spin_lock_slowpath+0x198/0x380 kernel/locking/qspinlock.c:471
queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
do_raw_spin_lock+0x10c/0x110 kernel/locking/spinlock_debug.c:115
__raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline]
_raw_spin_lock+0x5c/0x6c kernel/locking/spinlock.c:154
__mutex_unlock_slowpath+0x138/0x1cc kernel/locking/mutex.c:932
mutex_unlock+0x24/0x30 kernel/locking/mutex.c:543
dbAllocBits+0x364/0x3b0 fs/jfs/jfs_dmap.c:2225
dbAllocDmap+0x44/0xd0 fs/jfs/jfs_dmap.c:1999
dbAllocNext+0x280/0x290 fs/jfs/jfs_dmap.c:1152
dbAlloc+0x200/0x694 fs/jfs/jfs_dmap.c:786
extBalloc+0xd0/0x368 fs/jfs/jfs_extent.c:321
extAlloc+0x16c/0x384 fs/jfs/jfs_extent.c:122
jfs_get_block+0x1b4/0x3ec fs/jfs/inode.c:248
__block_write_begin_int+0x240/0x95c fs/buffer.c:2006
__block_write_begin fs/buffer.c:2056 [inline]
block_write_begin+0x74/0x14c fs/buffer.c:2117
jfs_write_begin+0x44/0x88 fs/jfs/inode.c:304
generic_perform_write+0xf0/0x2cc mm/filemap.c:3738
__generic_file_write_iter+0xd8/0x21c mm/filemap.c:3866
generic_file_write_iter+0x6c/0x168 mm/filemap.c:3898
call_write_iter include/linux/fs.h:2187 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x2dc/0x46c fs/read_write.c:578
ksys_write+0xb4/0x160 fs/read_write.c:631
__do_sys_write fs/read_write.c:643 [inline]
__se_sys_write fs/read_write.c:640 [inline]
__arm64_sys_write+0x24/0x34 fs/read_write.c:640
__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+0x48/0x164 arch/arm64/kernel/syscall.c:206
el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654
el0t_64_sync+0x18c/0x190
Code: 8b2c4ecc f85f818c 1200056b 8b2b52ab (f82b6988)
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
0: 8b2c4ecc add x12, x22, w12, uxtw #3
4: f85f818c ldur x12, [x12, #-8]
8: 1200056b and w11, w11, #0x3
c: 8b2b52ab add x11, x21, w11, uxtw #4
* 10: f82b6988 str x8, [x12, x11] <-- trapping instruction

---
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