===========================================
==================================================================
BUG: KASAN: user-memory-access in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: user-memory-access in atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
BUG: KASAN: user-memory-access in jfs_statfs+0x1f8/0x484 fs/jfs/super.c:140
Read of size 4 at addr 00000000000050c0 by task syz.5.1727/12034

CPU: 1 UID: 0 PID: 12034 Comm: syz.5.1727 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 print_report+0x58/0x84 mm/kasan/report.c:485
 kasan_report+0xb0/0x110 mm/kasan/report.c:595
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x264/0x2a4 mm/kasan/generic.c:200
 __kasan_check_read+0x20/0x30 mm/kasan/shadow.c:31
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
 jfs_statfs+0x1f8/0x484 fs/jfs/super.c:140
 statfs_by_dentry fs/statfs.c:66 [inline]
 vfs_statfs+0x13c/0x2b0 fs/statfs.c:90
 fd_statfs fs/statfs.c:121 [inline]
 __do_sys_fstatfs fs/statfs.c:214 [inline]
 __se_sys_fstatfs fs/statfs.c:211 [inline]
 __arm64_sys_fstatfs+0xec/0x1a0 fs/statfs.c:211
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
==================================================================
Unable to handle kernel paging request at virtual address dfff800000000a18
KASAN: probably user-memory-access in range [0x00000000000050c0-0x00000000000050c7]
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
[dfff800000000a18] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1]  SMP
Modules linked in:
CPU: 1 UID: 0 PID: 12034 Comm: syz.5.1727 Tainted: G    B               syzkaller #0 PREEMPT 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
pc : atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline]
pc : jfs_statfs+0x1fc/0x484 fs/jfs/super.c:140
lr : instrument_atomic_read include/linux/instrumented.h:68 [inline]
lr : atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
lr : jfs_statfs+0x1f8/0x484 fs/jfs/super.c:140
sp : ffff80009df37ba0
x29: ffff80009df37bb0 x28: 0000000000000a18 x27: 1fffe0001b0d2fd4
x26: 0000000000005000 x25: 0000000000000000 x24: dfff800000000000
x23: dfff800000000000 x22: ffff80009df37ca0 x21: ffff0000d8697ea0
x20: 00000000000050c0 x19: ffff80009df37c80 x18: 1fffe000337dfe90
x17: ffff80008f57e000 x16: ffff800082debe40 x15: 0000000000000001
x14: 1ffff000125cd314 x13: 0000000000000000 x12: 0000000000000000
x11: ffff7000125cd315 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : 0000000000000000 x7 : fffffffffffdbb48 x6 : ffff8000805653c0
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000803c084c
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline] (P)
 atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline] (P)
 jfs_statfs+0x1fc/0x484 fs/jfs/super.c:140 (P)
 statfs_by_dentry fs/statfs.c:66 [inline]
 vfs_statfs+0x13c/0x2b0 fs/statfs.c:90
 fd_statfs fs/statfs.c:121 [inline]
 __do_sys_fstatfs fs/statfs.c:214 [inline]
 __se_sys_fstatfs fs/statfs.c:211 [inline]
 __arm64_sys_fstatfs+0xec/0x1a0 fs/statfs.c:211
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
Code: 52800081 aa1403e0 97c26d42 d343fe9c (38f76b88) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	52800081 	mov	w1, #0x4                   	// #4
   4:	aa1403e0 	mov	x0, x20
   8:	97c26d42 	bl	0xffffffffff09b510
   c:	d343fe9c 	lsr	x28, x20, #3
* 10:	38f76b88 	ldrsb	w8, [x28, x23] <-- trapping instruction