BUG: spinlock bad magic on CPU#0, jfsCommit/99 ================================================================== BUG: KASAN: slab-out-of-bounds in string_nocheck lib/vsprintf.c:639 [inline] BUG: KASAN: slab-out-of-bounds in string+0x200/0x290 lib/vsprintf.c:721 Read of size 1 at addr ffff0000ebbb49c0 by task jfsCommit/99 CPU: 0 UID: 0 PID: 99 Comm: jfsCommit Not tainted 6.16.0-rc7-syzkaller-g82af5ea7c611 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 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_address_description+0xa8/0x220 mm/kasan/report.c:378 print_report+0x68/0x84 mm/kasan/report.c:480 kasan_report+0xb0/0x110 mm/kasan/report.c:593 __asan_report_load1_noabort+0x20/0x2c mm/kasan/report_generic.c:378 string_nocheck lib/vsprintf.c:639 [inline] string+0x200/0x290 lib/vsprintf.c:721 vsnprintf+0x814/0xd60 lib/vsprintf.c:2874 vprintk_store+0x308/0xac8 kernel/printk/printk.c:2279 vprintk_emit+0x224/0x430 kernel/printk/printk.c:2426 vprintk_default+0x54/0x80 kernel/printk/printk.c:2465 vprintk+0x90/0x128 kernel/printk/printk_safe.c:82 _printk+0xd0/0x118 kernel/printk/printk.c:2475 spin_dump+0x100/0x1ec kernel/locking/spinlock_debug.c:64 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:105 [inline] __wake_up+0x40/0x1a8 kernel/sched/wait.c:127 unlock_metapage fs/jfs/jfs_metapage.c:40 [inline] release_metapage+0x164/0xa3c fs/jfs/jfs_metapage.c:869 xtTruncate+0xb94/0x2734 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:153 evict+0x414/0x928 fs/inode.c:810 iput_final fs/inode.c:1898 [inline] iput+0x6e4/0x83c fs/inode.c:1924 txUpdateMap+0x798/0x8d0 fs/jfs/jfs_txnmgr.c:2367 txLazyCommit fs/jfs/jfs_txnmgr.c:2664 [inline] jfs_lazycommit+0x394/0x94c fs/jfs/jfs_txnmgr.c:2733 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 The buggy address belongs to the object at ffff0000ebbb49c0 which belongs to the cache jfs_ip of size 2232 The buggy address is located 0 bytes inside of allocated 2232-byte region [ffff0000ebbb49c0, ffff0000ebbb5278) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12bbb0 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff0000e1608601 flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 05ffc00000000040 ffff0000c2234640 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800d000d 00000000f5000000 ffff0000e1608601 head: 05ffc00000000040 ffff0000c2234640 dead000000000122 0000000000000000 head: 0000000000000000 00000000800d000d 00000000f5000000 ffff0000e1608601 head: 05ffc00000000003 fffffdffc3aeec01 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000ebbb4880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000ebbb4900: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc >ffff0000ebbb4980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000ebbb4a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000ebbb4a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== lock: 0xffff0000ebbb4130, .magic: ffff8000, .owner: /-340048712, .owner_cpu: 768 CPU: 0 UID: 0 PID: 99 Comm: jfsCommit Tainted: G B 6.16.0-rc7-syzkaller-g82af5ea7c611 #0 PREEMPT Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 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:105 [inline] __wake_up+0x40/0x1a8 kernel/sched/wait.c:127 unlock_metapage fs/jfs/jfs_metapage.c:40 [inline] release_metapage+0x164/0xa3c fs/jfs/jfs_metapage.c:869 xtTruncate+0xb94/0x2734 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:153 evict+0x414/0x928 fs/inode.c:810 iput_final fs/inode.c:1898 [inline] iput+0x6e4/0x83c fs/inode.c:1924 txUpdateMap+0x798/0x8d0 fs/jfs/jfs_txnmgr.c:2367 txLazyCommit fs/jfs/jfs_txnmgr.c:2664 [inline] jfs_lazycommit+0x394/0x94c fs/jfs/jfs_txnmgr.c:2733 kthread+0x5fc/0x75c kernel/kthread.c:464 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 8908 is out of range for type 'unsigned long[8]' CPU: 0 UID: 0 PID: 99 Comm: jfsCommit Tainted: G B 6.16.0-rc7-syzkaller-g82af5ea7c611 #0 PREEMPT Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 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:105 [inline] __wake_up+0x40/0x1a8 kernel/sched/wait.c:127 unlock_metapage fs/jfs/jfs_metapage.c:40 [inline] release_metapage+0x164/0xa3c fs/jfs/jfs_metapage.c:869 xtTruncate+0xb94/0x2734 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:153 evict+0x414/0x928 fs/inode.c:810 iput_final fs/inode.c:1898 [inline] iput+0x6e4/0x83c fs/inode.c:1924 txUpdateMap+0x798/0x8d0 fs/jfs/jfs_txnmgr.c:2367 txLazyCommit fs/jfs/jfs_txnmgr.c:2664 [inline] jfs_lazycommit+0x394/0x94c fs/jfs/jfs_txnmgr.c:2733 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 ---[ end trace ]--- Unable to handle kernel paging request at virtual address ffff80008f5e66d0 KASAN: probably user-memory-access in range [0x000000047af33680-0x000000047af33687] Mem abort info: ESR = 0x0000000096000047 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x07: level 3 translation fault Data abort info: ISV = 0, ISS = 0x00000047, ISS2 = 0x00000000 CM = 0, WnR = 1, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000207157000 [ffff80008f5e66d0] pgd=0000000000000000, p4d=100000020f963003, pud=100000020f964003, pmd=100000020f968003, pte=0000000000000000 Internal error: Oops: 0000000096000047 [#1] SMP Modules linked in: CPU: 0 UID: 0 PID: 99 Comm: jfsCommit Tainted: G B 6.16.0-rc7-syzkaller-g82af5ea7c611 #0 PREEMPT Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : queued_spin_lock_slowpath+0x85c/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 : ffff80009b7e7320 x29: ffff80009b7e73c0 x28: 1fffe0001d776826 x27: ffff80008f5e66d0 x26: ffff80008f5e66d0 x25: dfff800000000000 x24: ffff7000136fce68 x23: ffff00019bea46c8 x22: 1fffe000337d48d8 x21: ffff00019bea46c0 x20: ffff0000c48b9e90 x19: ffff0000ebbb4130 x18: 00000000ffffffff x17: 0000000000000000 x16: ffff80008af01c68 x15: ffff7000125db64c x14: 1ffff000125db64c x13: 0000000000000004 x12: ffffffffffffffff x11: ffff7000125db64c x10: ffff80008f5e66c0 x9 : 0000000000000001 x8 : 0000000000000000 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff80009b7e6c38 x4 : ffff80008f776bc0 x3 : ffff8000803b692c x2 : 0000000000000001 x1 : 0000000000000004 x0 : ffff00019bea46c8 Call trace: queued_spin_lock_slowpath+0x85c/0xaec kernel/locking/qspinlock.c:291 (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:105 [inline] __wake_up+0x40/0x1a8 kernel/sched/wait.c:127 unlock_metapage fs/jfs/jfs_metapage.c:40 [inline] release_metapage+0x164/0xa3c fs/jfs/jfs_metapage.c:869 xtTruncate+0xb94/0x2734 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:153 evict+0x414/0x928 fs/inode.c:810 iput_final fs/inode.c:1898 [inline] iput+0x6e4/0x83c fs/inode.c:1924 txUpdateMap+0x798/0x8d0 fs/jfs/jfs_txnmgr.c:2367 txLazyCommit fs/jfs/jfs_txnmgr.c:2664 [inline] jfs_lazycommit+0x394/0x94c fs/jfs/jfs_txnmgr.c:2733 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 Code: aa1a03e0 974a55b0 aa1703e0 52800081 (f9000355) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: aa1a03e0 mov x0, x26 4: 974a55b0 bl 0xfffffffffd2956c4 8: aa1703e0 mov x0, x23 c: 52800081 mov w1, #0x4 // #4 * 10: f9000355 str x21, [x26] <-- trapping instruction