------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(__owner_task(owner) != get_current()) WARNING: CPU: 1 PID: 1994 at kernel/locking/mutex.c:918 __mutex_unlock_slowpath+0xd8/0x1cc kernel/locking/mutex.c:918 Modules linked in: CPU: 1 PID: 1994 Comm: syz-executor.1 Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __mutex_unlock_slowpath+0xd8/0x1cc kernel/locking/mutex.c:918 lr : __mutex_unlock_slowpath+0xd8/0x1cc kernel/locking/mutex.c:918 sp : ffff800013c3b670 x29: ffff800013c3b690 x28: ffff0001200de000 x27: 0000000000000001 x26: ffff80000d30c000 x25: ffff000120cc8000 x24: ffff80000ee2b000 x23: ffff80000cb542fd x22: ffff80000cb54322 x21: ffff80000cb4f733 x20: ffff000120cc7fff x19: ffff000128c59c50 x18: 000000000000028b x17: ffff80000bffd6bc x16: 0000000000000000 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000012 x12: 0000000000040000 x11: 000000000003ffff x10: ffff800019bff000 x9 : 84a730d9ee197f00 x8 : 84a730d9ee197f00 x7 : 4e5241575f534b43 x6 : ffff80000819545c x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000100000000 x0 : 0000000000000039 Call trace: __mutex_unlock_slowpath+0xd8/0x1cc kernel/locking/mutex.c:918 mutex_unlock+0x24/0x30 kernel/locking/mutex.c:543 dbAllocBits+0x364/0x3b0 fs/jfs/jfs_dmap.c:2225 dbAllocDmap+0x44/0xd0 fs/jfs/jfs_dmap.c:1999 dbAllocNext+0x280/0x290 fs/jfs/jfs_dmap.c:1152 dbAlloc+0x200/0x694 fs/jfs/jfs_dmap.c:786 extBalloc+0xd0/0x368 fs/jfs/jfs_extent.c:321 extAlloc+0x16c/0x384 fs/jfs/jfs_extent.c:122 jfs_get_block+0x1b4/0x3ec fs/jfs/inode.c:248 __block_write_begin_int+0x240/0x95c fs/buffer.c:2006 __block_write_begin fs/buffer.c:2056 [inline] block_write_begin+0x74/0x14c fs/buffer.c:2117 jfs_write_begin+0x44/0x88 fs/jfs/inode.c:304 generic_perform_write+0xf0/0x2cc mm/filemap.c:3738 __generic_file_write_iter+0xd8/0x21c mm/filemap.c:3866 generic_file_write_iter+0x6c/0x168 mm/filemap.c:3898 call_write_iter include/linux/fs.h:2187 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x2dc/0x46c fs/read_write.c:578 ksys_write+0xb4/0x160 fs/read_write.c:631 __do_sys_write fs/read_write.c:643 [inline] __se_sys_write fs/read_write.c:640 [inline] __arm64_sys_write+0x24/0x34 fs/read_write.c:640 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 irq event stamp: 12477 hardirqs last enabled at (12477): [] mod_objcg_state+0x19c/0x204 mm/memcontrol.c:3158 hardirqs last disabled at (12476): [] mod_objcg_state+0x128/0x204 mm/memcontrol.c:3105 softirqs last enabled at (10110): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (10108): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- Unable to handle kernel paging request at virtual address ffff80000d272a70 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 CM = 0, WnR = 1 swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000001c566b000 [ffff80000d272a70] pgd=100000023ffff003, p4d=100000023ffff003, pud=100000023fffe003, pmd=100000023fffa003, pte=0000000000000000 Internal error: Oops: 0000000096000047 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 1994 Comm: syz-executor.1 Tainted: G W 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : queued_spin_lock_slowpath+0x198/0x380 kernel/locking/qspinlock.c:474 lr : queued_spin_lock_slowpath+0x114/0x380 kernel/locking/qspinlock.c:405 sp : ffff800013c3b5e0 x29: ffff800013c3b5e0 x28: ffff0001200de000 x27: 0000000000000001 x26: ffff80000d30c000 x25: ffff000120cc8000 x24: ffff0001fefd0a40 x23: 0000000000000000 x22: ffff80000d30cf28 x21: ffff80000d272a40 x20: 0000000000000000 x19: ffff000128c59c58 x18: 0000000000000374 x17: ffff80000bffd6bc x16: 000000000000b67e x15: 0000000000000840 x14: 0000000002c12064 x13: 000000000000ffff x12: 0000000000000000 x11: ffff80000d272a70 x10: 0000000000040000 x9 : ffff0001fefd0a48 x8 : ffff0001fefd0a40 x7 : 0000000000000000 x6 : ffff80000bfc2310 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000001 x1 : ffff80000ce26a9f x0 : 0000000000000001 Call trace: decode_tail kernel/locking/qspinlock.c:131 [inline] queued_spin_lock_slowpath+0x198/0x380 kernel/locking/qspinlock.c:471 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x10c/0x110 kernel/locking/spinlock_debug.c:115 __raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline] _raw_spin_lock+0x5c/0x6c kernel/locking/spinlock.c:154 __mutex_unlock_slowpath+0x138/0x1cc kernel/locking/mutex.c:932 mutex_unlock+0x24/0x30 kernel/locking/mutex.c:543 dbAllocBits+0x364/0x3b0 fs/jfs/jfs_dmap.c:2225 dbAllocDmap+0x44/0xd0 fs/jfs/jfs_dmap.c:1999 dbAllocNext+0x280/0x290 fs/jfs/jfs_dmap.c:1152 dbAlloc+0x200/0x694 fs/jfs/jfs_dmap.c:786 extBalloc+0xd0/0x368 fs/jfs/jfs_extent.c:321 extAlloc+0x16c/0x384 fs/jfs/jfs_extent.c:122 jfs_get_block+0x1b4/0x3ec fs/jfs/inode.c:248 __block_write_begin_int+0x240/0x95c fs/buffer.c:2006 __block_write_begin fs/buffer.c:2056 [inline] block_write_begin+0x74/0x14c fs/buffer.c:2117 jfs_write_begin+0x44/0x88 fs/jfs/inode.c:304 generic_perform_write+0xf0/0x2cc mm/filemap.c:3738 __generic_file_write_iter+0xd8/0x21c mm/filemap.c:3866 generic_file_write_iter+0x6c/0x168 mm/filemap.c:3898 call_write_iter include/linux/fs.h:2187 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x2dc/0x46c fs/read_write.c:578 ksys_write+0xb4/0x160 fs/read_write.c:631 __do_sys_write fs/read_write.c:643 [inline] __se_sys_write fs/read_write.c:640 [inline] __arm64_sys_write+0x24/0x34 fs/read_write.c:640 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 Code: 8b2c4ecc f85f818c 1200056b 8b2b52ab (f82b6988) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 8b2c4ecc add x12, x22, w12, uxtw #3 4: f85f818c ldur x12, [x12, #-8] 8: 1200056b and w11, w11, #0x3 c: 8b2b52ab add x11, x21, w11, uxtw #4 * 10: f82b6988 str x8, [x12, x11] <-- trapping instruction