================================================================== BUG: KASAN: invalid-access in __lse__cmpxchg_case_acq_32 arch/arm64/include/asm/atomic_lse.h:271 [inline] BUG: KASAN: invalid-access in __cmpxchg_case_acq_32 arch/arm64/include/asm/cmpxchg.h:121 [inline] BUG: KASAN: invalid-access in __cmpxchg_acq arch/arm64/include/asm/cmpxchg.h:170 [inline] BUG: KASAN: invalid-access in raw_atomic_cmpxchg_acquire include/linux/atomic/atomic-arch-fallback.h:2055 [inline] BUG: KASAN: invalid-access in raw_atomic_try_cmpxchg_acquire include/linux/atomic/atomic-arch-fallback.h:2173 [inline] BUG: KASAN: invalid-access in atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1302 [inline] BUG: KASAN: invalid-access in queued_spin_lock include/asm-generic/qspinlock.h:112 [inline] BUG: KASAN: invalid-access in do_raw_spin_lock include/linux/spinlock.h:188 [inline] BUG: KASAN: invalid-access in __raw_spin_lock_irq include/linux/spinlock_api_smp.h:166 [inline] BUG: KASAN: invalid-access in _raw_spin_lock_irq+0x20/0x6c kernel/locking/spinlock.c:189 Write at addr f1f000000b4ff000 by task syz.1.1502/7564 Pointer tag: [f1], memory tag: [f0] CPU: 0 UID: 0 PID: 7564 Comm: syz.1.1502 Tainted: G W L syzkaller #0 PREEMPT Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: linux,dummy-virt (DT) Call trace: dump_backtrace arch/arm64/kernel/stacktrace.c:498 [inline] (C) show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x60/0x80 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x1c4/0x4b0 mm/kasan/report.c:482 kasan_report+0x84/0xac mm/kasan/report.c:595 report_tag_fault arch/arm64/mm/fault.c:368 [inline] do_tag_recovery arch/arm64/mm/fault.c:380 [inline] __do_kernel_fault+0x1b4/0x220 arch/arm64/mm/fault.c:424 do_bad_area+0x68/0x80 arch/arm64/mm/fault.c:529 do_tag_check_fault+0x34/0x44 arch/arm64/mm/fault.c:909 do_mem_abort+0x40/0x90 arch/arm64/mm/fault.c:985 el1_abort+0x44/0x64 arch/arm64/kernel/entry-common.c:342 el1h_64_sync_handler+0x50/0xac arch/arm64/kernel/entry-common.c:469 el1h_64_sync+0x6c/0x70 arch/arm64/kernel/entry.S:585 __lse__cmpxchg_case_acq_32 arch/arm64/include/asm/atomic_lse.h:271 [inline] (P) __cmpxchg_case_acq_32 arch/arm64/include/asm/cmpxchg.h:121 [inline] (P) __cmpxchg_acq arch/arm64/include/asm/cmpxchg.h:170 [inline] (P) raw_atomic_cmpxchg_acquire include/linux/atomic/atomic-arch-fallback.h:2055 [inline] (P) raw_atomic_try_cmpxchg_acquire include/linux/atomic/atomic-arch-fallback.h:2173 [inline] (P) atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1302 [inline] (P) queued_spin_lock include/asm-generic/qspinlock.h:112 [inline] (P) do_raw_spin_lock include/linux/spinlock.h:188 [inline] (P) __raw_spin_lock_irq include/linux/spinlock_api_smp.h:166 [inline] (P) _raw_spin_lock_irq+0x20/0x6c kernel/locking/spinlock.c:189 (P) do_dentry_open+0x128/0x4fc fs/open.c:996 vfs_open+0x2c/0xe8 fs/open.c:1101 do_open fs/namei.c:4837 [inline] path_openat+0x5b4/0x960 fs/namei.c:5000 do_file_open+0xb0/0x168 fs/namei.c:5029 do_sys_openat2+0x84/0x104 fs/open.c:1417 do_sys_open fs/open.c:1423 [inline] __do_sys_openat fs/open.c:1439 [inline] __se_sys_openat fs/open.c:1434 [inline] __arm64_sys_openat+0x64/0xc0 fs/open.c:1434 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x54/0x10c arch/arm64/kernel/syscall.c:49 el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:121 do_el0_svc+0x1c/0x34 arch/arm64/kernel/syscall.c:140 el0_svc+0x38/0x1fc arch/arm64/kernel/entry-common.c:758 el0t_64_sync_handler+0xa0/0xe4 arch/arm64/kernel/entry-common.c:777 el0t_64_sync+0x1a4/0x1a8 arch/arm64/kernel/entry.S:590 The buggy address belongs to the object at fff000000b4ff000 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 0 bytes inside of 512-byte region [fff000000b4ff000, fff000000b4ff200) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4b4fe head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x1ffc00000000040(head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) page_type: f5(slab) raw: 01ffc00000000040 f0f0000003401900 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000 head: 01ffc00000000040 f0f0000003401900 dead000000000100 dead000000000122 head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000 head: 01ffc00000000001 ffffc1ffc02d3f81 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000002 page dumped because: kasan: bad access detected Memory state around the buggy address: fff000000b4fee00: f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 f5 fff000000b4fef00: f5 f5 f5 f5 f5 f5 f5 f5 fe fe fe fe fe fe fe fe >fff000000b4ff000: f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 ^ fff000000b4ff100: f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 fff000000b4ff200: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ==================================================================