BUG: spinlock bad magic on CPU#1, jfsCommit/100 lock: 0xffff0000f3e45310, .magic: ffff8000, .owner: ;ду/768, .owner_cpu: 768 CPU: 1 UID: 0 PID: 100 Comm: jfsCommit Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 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 dump_stack+0x1c/0x28 lib/dump_stack.c:129 spin_dump+0x104/0x1ec kernel/locking/spinlock_debug.c:70 spin_bug kernel/locking/spinlock_debug.c:78 [inline] debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline] do_raw_spin_lock+0x1c4/0x2cc kernel/locking/spinlock_debug.c:115 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline] _raw_spin_lock_irqsave+0x64/0x7c kernel/locking/spinlock.c:162 __wake_up_common_lock kernel/sched/wait.c:124 [inline] __wake_up+0x40/0x1a8 kernel/sched/wait.c:146 unlock_metapage fs/jfs/jfs_metapage.c:40 [inline] release_metapage+0x164/0xa3c fs/jfs/jfs_metapage.c:871 xtTruncate+0xbe4/0x27ac fs/jfs/jfs_xtree.c:-1 jfs_free_zero_link+0x2a4/0x410 fs/jfs/namei.c:759 jfs_evict_inode+0x2f4/0x3e8 fs/jfs/inode.c:159 evict+0x414/0x928 fs/inode.c:810 iput_final fs/inode.c:1914 [inline] iput+0x95c/0xad4 fs/inode.c:1966 txUpdateMap+0x798/0x8d0 fs/jfs/jfs_txnmgr.c:2368 txLazyCommit fs/jfs/jfs_txnmgr.c:2665 [inline] jfs_lazycommit+0x394/0x94c fs/jfs/jfs_txnmgr.c:2734 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 ------------[ cut here ]------------ UBSAN: array-index-out-of-bounds in kernel/locking/qspinlock.h:68:9 index 8904 is out of range for type 'unsigned long[8]' CPU: 1 UID: 0 PID: 100 Comm: jfsCommit Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 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 dump_stack+0x1c/0x28 lib/dump_stack.c:129 ubsan_epilogue+0x14/0x48 lib/ubsan.c:233 __ubsan_handle_out_of_bounds+0xd0/0xfc lib/ubsan.c:455 decode_tail kernel/locking/qspinlock.h:68 [inline] queued_spin_lock_slowpath+0x9f4/0xaec kernel/locking/qspinlock.c:285 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x2a8/0x2cc kernel/locking/spinlock_debug.c:116 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline] _raw_spin_lock_irqsave+0x64/0x7c kernel/locking/spinlock.c:162 __wake_up_common_lock kernel/sched/wait.c:124 [inline] __wake_up+0x40/0x1a8 kernel/sched/wait.c:146 unlock_metapage fs/jfs/jfs_metapage.c:40 [inline] release_metapage+0x164/0xa3c fs/jfs/jfs_metapage.c:871 xtTruncate+0xbe4/0x27ac fs/jfs/jfs_xtree.c:-1 jfs_free_zero_link+0x2a4/0x410 fs/jfs/namei.c:759 jfs_evict_inode+0x2f4/0x3e8 fs/jfs/inode.c:159 evict+0x414/0x928 fs/inode.c:810 iput_final fs/inode.c:1914 [inline] iput+0x95c/0xad4 fs/inode.c:1966 txUpdateMap+0x798/0x8d0 fs/jfs/jfs_txnmgr.c:2368 txLazyCommit fs/jfs/jfs_txnmgr.c:2665 [inline] jfs_lazycommit+0x394/0x94c fs/jfs/jfs_txnmgr.c:2734 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 ---[ end trace ]--- Unable to handle kernel paging request at virtual address ffff7d0e9ed793a7 KASAN: probably wild-memory-access in range [0xffffe874f6bc9d38-0xffffe874f6bc9d3f] Mem abort info: ESR = 0x0000000096000004 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x04: level 0 translation fault Data abort info: ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 swapper pgtable: 4k pages, 48-bit VAs, pgdp=000000020728e000 [ffff7d0e9ed793a7] pgd=0000000000000000, p4d=0000000000000000 Internal error: Oops: 0000000096000004 [#1] SMP Modules linked in: CPU: 1 UID: 0 PID: 100 Comm: jfsCommit Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 834000c5 (Nzcv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : queued_spin_lock_slowpath+0x844/0xaec kernel/locking/qspinlock.c:288 lr : decode_tail kernel/locking/qspinlock.h:68 [inline] lr : queued_spin_lock_slowpath+0x9f4/0xaec kernel/locking/qspinlock.c:285 sp : ffff8000993e7340 x29: ffff8000993e73e0 x28: 1fffe0001e7c8a62 x27: ffff80008f4e37d0 x26: ffffe874f6bc9d3c x25: dfff800000000000 x24: ffff70001327ce6c x23: ffff00019bf157c8 x22: 1fffe000337e2af8 x21: ffff00019bf157c0 x20: ffff0000c53f9ed0 x19: ffff0000f3e45310 x18: 00000000ffffffff x17: 363a682e6b636f6c x16: ffff800082de9540 x15: ffff7000125cd460 x14: 1ffff000125cd460 x13: 0000000000000004 x12: ffffffffffffffff x11: ffff7000125cd460 x10: ffff80008f4e37c0 x9 : 0000000000000001 x8 : 1ffffd0e9ed793a7 x7 : 0000000000000001 x6 : ffff8000805638d4 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000803beab8 x2 : 0000000000000001 x1 : 0000000000000001 x0 : 00000000ffffffff Call trace: queued_spin_lock_slowpath+0x844/0xaec kernel/locking/qspinlock.c:288 (P) queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x2a8/0x2cc kernel/locking/spinlock_debug.c:116 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline] _raw_spin_lock_irqsave+0x64/0x7c kernel/locking/spinlock.c:162 __wake_up_common_lock kernel/sched/wait.c:124 [inline] __wake_up+0x40/0x1a8 kernel/sched/wait.c:146 unlock_metapage fs/jfs/jfs_metapage.c:40 [inline] release_metapage+0x164/0xa3c fs/jfs/jfs_metapage.c:871 xtTruncate+0xbe4/0x27ac fs/jfs/jfs_xtree.c:-1 jfs_free_zero_link+0x2a4/0x410 fs/jfs/namei.c:759 jfs_evict_inode+0x2f4/0x3e8 fs/jfs/inode.c:159 evict+0x414/0x928 fs/inode.c:810 iput_final fs/inode.c:1914 [inline] iput+0x95c/0xad4 fs/inode.c:1966 txUpdateMap+0x798/0x8d0 fs/jfs/jfs_txnmgr.c:2368 txLazyCommit fs/jfs/jfs_txnmgr.c:2665 [inline] jfs_lazycommit+0x394/0x94c fs/jfs/jfs_txnmgr.c:2734 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 Code: 974e8f6b f9400348 8b1b011a d343ff48 (38796908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 974e8f6b bl 0xfffffffffd3a3dac 4: f9400348 ldr x8, [x26] 8: 8b1b011a add x26, x8, x27 c: d343ff48 lsr x8, x26, #3 * 10: 38796908 ldrb w8, [x8, x25] <-- trapping instruction