Oops: general protection fault, probably for non-canonical address 0xdffffc0000000007: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000038-0x000000000000003f] CPU: 0 UID: 0 PID: 11930 Comm: kworker/0:8 Tainted: G L 6.19.0-rc5 #11 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 Workqueue: events hci_uart_write_work RIP: 0010:kasan_byte_accessible+0x15/0x30 mm/kasan/generic.c:210 Code: 00 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 b8 00 00 00 00 00 fc ff df 48 c1 ef 03 48 01 c7 <0f> b6 07 3c 07 0f 96 c0 e9 8e a0 37 09 66 66 2e 0f 1f 84 00 00 00 RSP: 0018:ffffc900029ffa60 EFLAGS: 00010082 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8b5b2d9d RDI: dffffc0000000007 RBP: 0000000000000038 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff906888d7 R11: 0000000000000002 R12: 0000000000000000 R13: ffffffff8b5b2d9d R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888097d23000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3e61db0bd8 CR3: 0000000026850000 CR4: 0000000000752ef0 DR0: 00000000000007ff DR1: 0000000000000005 DR2: 0000000000000000 DR3: 00000000000084e9 DR6: 00000000ffff0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: __kasan_check_byte+0x14/0x50 mm/kasan/common.c:573 kasan_check_byte include/linux/kasan.h:402 [inline] lock_acquire kernel/locking/lockdep.c:5842 [inline] lock_acquire+0xfd/0x330 kernel/locking/lockdep.c:5825 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3d/0x60 kernel/locking/spinlock.c:162 skb_dequeue+0x20/0x180 net/core/skbuff.c:3937 mrvl_dequeue+0x3f/0xb0 drivers/bluetooth/hci_mrvl.c:126 hci_uart_dequeue drivers/bluetooth/hci_ldisc.c:107 [inline] hci_uart_write_work+0x4d5/0x940 drivers/bluetooth/hci_ldisc.c:161 process_one_work+0x992/0x1b00 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x67e/0xe90 kernel/workqueue.c:3421 kthread+0x3d0/0x780 kernel/kthread.c:463 ret_from_fork+0x966/0xaf0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:kasan_byte_accessible+0x15/0x30 mm/kasan/generic.c:210 Code: 00 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 b8 00 00 00 00 00 fc ff df 48 c1 ef 03 48 01 c7 <0f> b6 07 3c 07 0f 96 c0 e9 8e a0 37 09 66 66 2e 0f 1f 84 00 00 00 RSP: 0018:ffffc900029ffa60 EFLAGS: 00010082 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8b5b2d9d RDI: dffffc0000000007 RBP: 0000000000000038 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff906888d7 R11: 0000000000000002 R12: 0000000000000000 R13: ffffffff8b5b2d9d R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888097d23000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3e61db0bd8 CR3: 0000000026850000 CR4: 0000000000752ef0 DR0: 00000000000007ff DR1: 0000000000000005 DR2: 0000000000000000 DR3: 00000000000084e9 DR6: 00000000ffff0ff0 DR7: 0000000000000400 PKRU: 55555554 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 0f 1f 00 nopl (%rax) 5: 90 nop 6: 90 nop 7: 90 nop 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 0f 1f 40 d6 nopl -0x2a(%rax) 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 c1 ef 03 shr $0x3,%rdi 27: 48 01 c7 add %rax,%rdi * 2a: 0f b6 07 movzbl (%rdi),%eax <-- trapping instruction 2d: 3c 07 cmp $0x7,%al 2f: 0f 96 c0 setbe %al 32: e9 8e a0 37 09 jmpq 0x937a0c5 37: 66 data16 38: 66 data16 39: 2e cs 3a: 0f .byte 0xf 3b: 1f (bad) 3c: 84 00 test %al,(%rax) <<<<<<<<<<<<<<< tail report >>>>>>>>>>>>>>>