================================================================== BUG: KASAN: user-memory-access in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: user-memory-access in atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:400 [inline] BUG: KASAN: user-memory-access in __refcount_sub_and_test include/linux/refcount.h:389 [inline] BUG: KASAN: user-memory-access in __refcount_dec_and_test include/linux/refcount.h:432 [inline] BUG: KASAN: user-memory-access in refcount_dec_and_test include/linux/refcount.h:450 [inline] BUG: KASAN: user-memory-access in posix_acl_release include/linux/posix_acl.h:62 [inline] BUG: KASAN: user-memory-access in __destroy_inode+0x48c/0x7d0 fs/inode.c:383 Write of size 4 at addr 0000000b00000000 by task syz-executor/6503 CPU: 1 UID: 0 PID: 6503 Comm: syz-executor Not tainted 6.15.0-rc5-syzkaller-gc32f8dc5aaf9 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (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:524 kasan_report+0xb0/0x110 mm/kasan/report.c:634 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x264/0x2a4 mm/kasan/generic.c:189 __kasan_check_write+0x20/0x30 mm/kasan/shadow.c:37 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:400 [inline] __refcount_sub_and_test include/linux/refcount.h:389 [inline] __refcount_dec_and_test include/linux/refcount.h:432 [inline] refcount_dec_and_test include/linux/refcount.h:450 [inline] posix_acl_release include/linux/posix_acl.h:62 [inline] __destroy_inode+0x48c/0x7d0 fs/inode.c:383 destroy_inode fs/inode.c:394 [inline] evict+0x6bc/0x928 fs/inode.c:834 dispose_list fs/inode.c:852 [inline] evict_inodes+0x650/0x6e8 fs/inode.c:906 generic_shutdown_super+0xa0/0x2b8 fs/super.c:627 kill_block_super+0x44/0x90 fs/super.c:1710 deactivate_locked_super+0xc4/0x12c fs/super.c:473 deactivate_super+0xe0/0x100 fs/super.c:506 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1435 __cleanup_mnt+0x20/0x30 fs/namespace.c:1442 task_work_run+0x1dc/0x260 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x4e8/0x1998 kernel/exit.c:953 do_group_exit+0x194/0x22c kernel/exit.c:1102 __do_sys_exit_group kernel/exit.c:1113 [inline] __se_sys_exit_group kernel/exit.c:1111 [inline] pid_child_should_wake+0x0/0x1dc kernel/exit.c:1111 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 ================================================================== Unable to handle kernel paging request at virtual address 0000000b00000000 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 user pgtable: 4k pages, 48-bit VAs, pgdp=0000000129840000 [0000000b00000000] pgd=08000001151f5403, p4d=08000001151f5403, pud=0000000000000000 Internal error: Oops: 0000000096000005 [#1] SMP Modules linked in: CPU: 1 UID: 0 PID: 6503 Comm: syz-executor Tainted: G B 6.15.0-rc5-syzkaller-gc32f8dc5aaf9 #0 PREEMPT Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __lse_atomic_fetch_add_release arch/arm64/include/asm/atomic_lse.h:62 [inline] pc : __lse_atomic_fetch_sub_release arch/arm64/include/asm/atomic_lse.h:76 [inline] pc : arch_atomic_fetch_sub_release arch/arm64/include/asm/atomic.h:51 [inline] pc : raw_atomic_fetch_sub_release include/linux/atomic/atomic-arch-fallback.h:944 [inline] pc : atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:401 [inline] pc : __refcount_sub_and_test include/linux/refcount.h:389 [inline] pc : __refcount_dec_and_test include/linux/refcount.h:432 [inline] pc : refcount_dec_and_test include/linux/refcount.h:450 [inline] pc : posix_acl_release include/linux/posix_acl.h:62 [inline] pc : __destroy_inode+0x498/0x7d0 fs/inode.c:383 lr : __lse_atomic_fetch_add_release arch/arm64/include/asm/atomic_lse.h:62 [inline] lr : __lse_atomic_fetch_sub_release arch/arm64/include/asm/atomic_lse.h:76 [inline] lr : arch_atomic_fetch_sub_release arch/arm64/include/asm/atomic.h:51 [inline] lr : raw_atomic_fetch_sub_release include/linux/atomic/atomic-arch-fallback.h:944 [inline] lr : atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:401 [inline] lr : __refcount_sub_and_test include/linux/refcount.h:389 [inline] lr : __refcount_dec_and_test include/linux/refcount.h:432 [inline] lr : refcount_dec_and_test include/linux/refcount.h:450 [inline] lr : posix_acl_release include/linux/posix_acl.h:62 [inline] lr : __destroy_inode+0x494/0x7d0 fs/inode.c:383 sp : ffff8000a3687710 x29: ffff8000a3687710 x28: dfff800000000000 x27: 1fffe0001e3d1c26 x26: ffff7000146d0ef4 x25: 1fffe0001e3d1c40 x24: dfff800000000000 x23: ffff0000f1e8e210 x22: ffff0000ca5f4068 x21: 0000000000000001 x20: 0000000000000000 x19: 0000000b00000000 x18: 1fffe00033871676 x17: 0000000000000000 x16: ffff80008ad1d588 x15: 0000000000000001 x14: 1ffff000125518f4 x13: 0000000000000000 x12: 0000000000000000 x11: ffff7000125518f5 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 00000000ffffffff x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff8000a3686f78 x4 : ffff80008f405b40 x3 : ffff8000803b40c0 x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: __lse_atomic_fetch_add_release arch/arm64/include/asm/atomic_lse.h:-1 [inline] (P) __lse_atomic_fetch_sub_release arch/arm64/include/asm/atomic_lse.h:76 [inline] (P) arch_atomic_fetch_sub_release arch/arm64/include/asm/atomic.h:51 [inline] (P) raw_atomic_fetch_sub_release include/linux/atomic/atomic-arch-fallback.h:944 [inline] (P) atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:401 [inline] (P) __refcount_sub_and_test include/linux/refcount.h:389 [inline] (P) __refcount_dec_and_test include/linux/refcount.h:432 [inline] (P) refcount_dec_and_test include/linux/refcount.h:450 [inline] (P) posix_acl_release include/linux/posix_acl.h:62 [inline] (P) __destroy_inode+0x498/0x7d0 fs/inode.c:383 (P) destroy_inode fs/inode.c:394 [inline] evict+0x6bc/0x928 fs/inode.c:834 dispose_list fs/inode.c:852 [inline] evict_inodes+0x650/0x6e8 fs/inode.c:906 generic_shutdown_super+0xa0/0x2b8 fs/super.c:627 kill_block_super+0x44/0x90 fs/super.c:1710 deactivate_locked_super+0xc4/0x12c fs/super.c:473 deactivate_super+0xe0/0x100 fs/super.c:506 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1435 __cleanup_mnt+0x20/0x30 fs/namespace.c:1442 task_work_run+0x1dc/0x260 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x4e8/0x1998 kernel/exit.c:953 do_group_exit+0x194/0x22c kernel/exit.c:1102 __do_sys_exit_group kernel/exit.c:1113 [inline] __se_sys_exit_group kernel/exit.c:1111 [inline] pid_child_should_wake+0x0/0x1dc kernel/exit.c:1111 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Code: 97fab78f d503201f 97e678f8 12800008 (b8680274) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 97fab78f bl 0xffffffffffeade3c 4: d503201f nop 8: 97e678f8 bl 0xffffffffff99e3e8 c: 12800008 mov w8, #0xffffffff // #-1 * 10: b8680274 ldaddl w8, w20, [x19] <-- trapping instruction