XFS (loop4): Quotacheck: Done.
==================================================================
BUG: KASAN: stack-out-of-bounds in __lock_acquire+0x114/0x763c kernel/locking/lockdep.c:5005
Read of size 8 at addr ffff800097c975d8 by task syz-executor.4/7112

CPU: 0 PID: 7112 Comm: syz-executor.4 Not tainted 6.7.0-rc6-syzkaller-00090-gaafe7ad77b91 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:291
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:298
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0x174/0x514 mm/kasan/report.c:475
 kasan_report+0xd8/0x138 mm/kasan/report.c:588
 __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381
 __lock_acquire+0x114/0x763c kernel/locking/lockdep.c:5005
 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5754
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x5c/0x7c kernel/locking/spinlock.c:162
 down+0x3c/0xe8 kernel/locking/semaphore.c:59
 xfs_buf_lock+0x178/0x624 fs/xfs/xfs_buf.c:1126
 xfs_buf_delwri_submit_buffers+0x12c/0x87c fs/xfs/xfs_buf.c:2174
 xfs_buf_delwri_submit+0xbc/0x244 fs/xfs/xfs_buf.c:2252
 xfs_qm_shrink_scan+0x198/0x378 fs/xfs/xfs_qm.c:521
 do_shrink_slab+0x62c/0x1234 mm/shrinker.c:435
 shrink_slab+0xe9c/0x124c mm/shrinker.c:662
 drop_slab_node mm/vmscan.c:387 [inline]
 drop_slab+0x124/0x26c mm/vmscan.c:405
 drop_caches_sysctl_handler+0x17c/0x398 fs/drop_caches.c:68
 proc_sys_call_handler+0x4cc/0x7cc fs/proc/proc_sysctl.c:600
 proc_sys_write+0x2c/0x3c fs/proc/proc_sysctl.c:626
 do_iter_write+0x654/0xa78 fs/read_write.c:860
 vfs_iter_write+0x88/0xac fs/read_write.c:901
 iter_file_splice_write+0x628/0xc58 fs/splice.c:736
 do_splice_from fs/splice.c:933 [inline]
 direct_splice_actor+0xe4/0x1c0 fs/splice.c:1142
 splice_direct_to_actor+0x2a0/0x7e4 fs/splice.c:1088
 do_splice_direct+0x20c/0x348 fs/splice.c:1194
 do_sendfile+0x4bc/0xc70 fs/read_write.c:1254
 __do_sys_sendfile64 fs/read_write.c:1316 [inline]
 __se_sys_sendfile64 fs/read_write.c:1308 [inline]
 __arm64_sys_sendfile64+0x23c/0x3b4 fs/read_write.c:1308
 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155
 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595

The buggy address belongs to the virtual mapping at
 [ffff800097c90000, ffff800097c99000) created by:
 copy_process+0x488/0x3478 kernel/fork.c:2332

The buggy address belongs to the physical page:
page:00000000c31de2d9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1042ce
memcg:ffff0000d0a4fd02
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 05ffc00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff ffff0000d0a4fd02
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff800097c97480: 00 00 00 00 f1 f1 f1 f1 00 00 00 00 00 00 00 00
 ffff800097c97500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff800097c97580: 00 00 00 00 00 00 00 00 f3 f3 f3 f3 f3 f3 f3 f3
                                                    ^
 ffff800097c97600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff800097c97680: 00 00 00 00 f1 f1 f1 f1 00 00 f3 f3 00 00 00 00
==================================================================
Unable to handle kernel paging request at virtual address dfff800000000019
KASAN: null-ptr-deref in range [0x00000000000000c8-0x00000000000000cf]
Mem abort info:
  ESR = 0x0000000096000005
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x05: level 1 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[dfff800000000019] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 7112 Comm: syz-executor.4 Tainted: G    B              6.7.0-rc6-syzkaller-00090-gaafe7ad77b91 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : check_wait_context kernel/locking/lockdep.c:4773 [inline]
pc : __lock_acquire+0x568/0x763c kernel/locking/lockdep.c:5087
lr : hlock_class kernel/locking/lockdep.c:232 [inline]
lr : check_wait_context kernel/locking/lockdep.c:4773 [inline]
lr : __lock_acquire+0x738/0x763c kernel/locking/lockdep.c:5087
sp : ffff800097956780
x29: ffff800097956a40 x28: ffff0000daa83c00 x27: ffff0000daa846a0
x26: 1fffe0001b5508d4 x25: ffff0000daa84658 x24: 0000000000000001
x23: 0000000000000001 x22: 0000000000001178 x21: ffff80009184f9a8
x20: 0000000000000000 x19: 00000000000000c8 x18: 1fffe000368261ce
x17: 0000000000000000 x16: ffff80008a82b138 x15: 0000000000000001
x14: 1ffff000122a4f38 x13: 0000000000000000 x12: dfff800000000000
x11: 0000000000080000 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : 0000000000000019 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800097955f78 x4 : ffff80008e5d20c0 x3 : ffff80008031a630
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 check_wait_context kernel/locking/lockdep.c:4773 [inline]
 __lock_acquire+0x568/0x763c kernel/locking/lockdep.c:5087
 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5754
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x5c/0x7c kernel/locking/spinlock.c:162
 down+0x3c/0xe8 kernel/locking/semaphore.c:59
 xfs_buf_lock+0x178/0x624 fs/xfs/xfs_buf.c:1126
 xfs_buf_delwri_submit_buffers+0x12c/0x87c fs/xfs/xfs_buf.c:2174
 xfs_buf_delwri_submit+0xbc/0x244 fs/xfs/xfs_buf.c:2252
 xfs_qm_shrink_scan+0x198/0x378 fs/xfs/xfs_qm.c:521
 do_shrink_slab+0x62c/0x1234 mm/shrinker.c:435
 shrink_slab+0xe9c/0x124c mm/shrinker.c:662
 drop_slab_node mm/vmscan.c:387 [inline]
 drop_slab+0x124/0x26c mm/vmscan.c:405
 drop_caches_sysctl_handler+0x17c/0x398 fs/drop_caches.c:68
 proc_sys_call_handler+0x4cc/0x7cc fs/proc/proc_sysctl.c:600
 proc_sys_write+0x2c/0x3c fs/proc/proc_sysctl.c:626
 do_iter_write+0x654/0xa78 fs/read_write.c:860
 vfs_iter_write+0x88/0xac fs/read_write.c:901
 iter_file_splice_write+0x628/0xc58 fs/splice.c:736
 do_splice_from fs/splice.c:933 [inline]
 direct_splice_actor+0xe4/0x1c0 fs/splice.c:1142
 splice_direct_to_actor+0x2a0/0x7e4 fs/splice.c:1088
 do_splice_direct+0x20c/0x348 fs/splice.c:1194
 do_sendfile+0x4bc/0xc70 fs/read_write.c:1254
 __do_sys_sendfile64 fs/read_write.c:1316 [inline]
 __se_sys_sendfile64 fs/read_write.c:1308 [inline]
 __arm64_sys_sendfile64+0x23c/0x3b4 fs/read_write.c:1308
 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155
 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595
Code: 34000ee8 aa1f03e8 91032113 d343fe68 (38ec6908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	34000ee8 	cbz	w8, 0x1dc
   4:	aa1f03e8 	mov	x8, xzr
   8:	91032113 	add	x19, x8, #0xc8
   c:	d343fe68 	lsr	x8, x19, #3
* 10:	38ec6908 	ldrsb	w8, [x8, x12] <-- trapping instruction