------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(1) WARNING: CPU: 0 PID: 10856 at kernel/locking/lockdep.c:232 check_wait_context kernel/locking/lockdep.c:4773 [inline] WARNING: CPU: 0 PID: 10856 at kernel/locking/lockdep.c:232 __lock_acquire+0x78c/0x763c kernel/locking/lockdep.c:5087 Modules linked in: CPU: 0 PID: 10856 Comm: syz-executor.1 Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : check_wait_context kernel/locking/lockdep.c:4773 [inline] pc : __lock_acquire+0x78c/0x763c kernel/locking/lockdep.c:5087 lr : hlock_class kernel/locking/lockdep.c:232 [inline] lr : check_wait_context kernel/locking/lockdep.c:4773 [inline] lr : __lock_acquire+0x780/0x763c kernel/locking/lockdep.c:5087 sp : ffff800099ba7240 x29: ffff800099ba7500 x28: ffff0000d7f65a00 x27: ffff0000d7f664f0 x26: 1fffe0001afecc9e x25: ffff0000d7f66458 x24: 0000000000000001 x23: 0000000000000003 x22: 0000000000000c17 x21: ffff8000922364c0 x20: 0000000000000000 x19: ffff0000d7f664f4 x18: 1fffe000367fff96 x17: 0000000000000000 x16: ffff80008ad6b09c x15: 0000000000000001 x14: 1fffe00036800002 x13: 0000000000000000 x12: dfff800000000000 x11: 0000000000040000 x10: 0000000000022c3d x9 : afcfeb2b6d9f9a00 x8 : 0000000000000000 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800099ba6b38 x4 : ffff80008ed822c0 x3 : ffff8000805ba130 x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000000 Call trace: check_wait_context kernel/locking/lockdep.c:4773 [inline] __lock_acquire+0x78c/0x763c kernel/locking/lockdep.c:5087 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5754 __flush_workqueue+0x14c/0x11c4 kernel/workqueue.c:3146 nci_close_device+0x140/0x5b8 net/nfc/nci/core.c:567 nci_dev_down+0x40/0x54 net/nfc/nci/core.c:639 nfc_dev_down net/nfc/core.c:161 [inline] nfc_rfkill_set_block+0x14c/0x2d0 net/nfc/core.c:179 rfkill_set_block+0x18c/0x37c net/rfkill/core.c:346 rfkill_fop_write+0x578/0x734 net/rfkill/core.c:1305 vfs_write+0x3c0/0xc3c fs/read_write.c:588 ksys_write+0x15c/0x26c fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:652 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 irq event stamp: 2283 hardirqs last enabled at (2283): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1397 [inline] hardirqs last enabled at (2283): [] finish_lock_switch+0xbc/0x1e4 kernel/sched/core.c:5154 hardirqs last disabled at (2282): [] __schedule+0x2bc/0x24b4 kernel/sched/core.c:6625 softirqs last enabled at (546): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (544): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- Unable to handle kernel paging request at virtual address dfff800000000018 KASAN: null-ptr-deref in range [0x00000000000000c0-0x00000000000000c7] 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 [dfff800000000018] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 10856 Comm: syz-executor.1 Tainted: G W 6.8.0-rc7-syzkaller-g707081b61156 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : check_wait_context kernel/locking/lockdep.c:4773 [inline] pc : __lock_acquire+0x568/0x763c kernel/locking/lockdep.c:5087 lr : hlock_class kernel/locking/lockdep.c:232 [inline] lr : check_wait_context kernel/locking/lockdep.c:4773 [inline] lr : __lock_acquire+0x780/0x763c kernel/locking/lockdep.c:5087 sp : ffff800099ba7240 x29: ffff800099ba7500 x28: ffff0000d7f65a00 x27: ffff0000d7f664f0 x26: 1fffe0001afecc9e x25: ffff0000d7f66458 x24: 0000000000000001 x23: 0000000000000003 x22: 0000000000000c17 x21: ffff8000922364c0 x20: 0000000000000000 x19: 00000000000000c4 x18: 1fffe000367fff96 x17: 0000000000000000 x16: ffff80008ad6b09c x15: 0000000000000001 x14: 1fffe00036800002 x13: 0000000000000000 x12: dfff800000000000 x11: 0000000000040000 x10: 0000000000022c3d x9 : afcfeb2b6d9f9a00 x8 : 0000000000000018 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800099ba6b38 x4 : ffff80008ed822c0 x3 : ffff8000805ba130 x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000000 Call trace: check_wait_context kernel/locking/lockdep.c:4773 [inline] __lock_acquire+0x568/0x763c kernel/locking/lockdep.c:5087 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5754 __flush_workqueue+0x14c/0x11c4 kernel/workqueue.c:3146 nci_close_device+0x140/0x5b8 net/nfc/nci/core.c:567 nci_dev_down+0x40/0x54 net/nfc/nci/core.c:639 nfc_dev_down net/nfc/core.c:161 [inline] nfc_rfkill_set_block+0x14c/0x2d0 net/nfc/core.c:179 rfkill_set_block+0x18c/0x37c net/rfkill/core.c:346 rfkill_fop_write+0x578/0x734 net/rfkill/core.c:1305 vfs_write+0x3c0/0xc3c fs/read_write.c:588 ksys_write+0x15c/0x26c fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:652 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Code: 34000ee8 aa1f03e8 91031113 d343fe68 (38ec6908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 34000ee8 cbz w8, 0x1dc 4: aa1f03e8 mov x8, xzr 8: 91031113 add x19, x8, #0xc4 c: d343fe68 lsr x8, x19, #3 * 10: 38ec6908 ldrsb w8, [x8, x12] <-- trapping instruction