BUG: kernel NULL pointer dereference, address: 00000000000000b8
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 11b1bb067 P4D 11b1bb067 PUD 1044e3067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP
CPU: 0 PID: 10531 Comm: syz-executor.0 Not tainted 5.9.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:skb_tail_pointer include/linux/skbuff.h:2193 [inline]
RIP: 0010:skb_put+0x11/0x60 net/core/skbuff.c:1862
Code: 6c 04 00 85 c0 0f 85 d0 d9 00 00 e8 c9 fa 7a fe 31 c0 c3 66 0f 1f 44 00 00 41 55 41 54 41 89 f4 55 48 89 fd 53 e8 af fa 7a fe <8b> 85 b8 00 00 00 8b 55 74 48 89 c3 48 03 85 c0 00 00 00 85 d2 75
RSP: 0018:ffffc90009207dc0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8881050b0600 RCX: 0000000000000000
RDX: ffff88812a7e5040 RSI: ffffffff82b4aa71 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000200000 R09: 0000000000000000
R10: ffff88810460c198 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000001 R14: ffff888104737400 R15: ffff88812aac4f00
FS:  00007ff11bc97700(0000) GS:ffff88812c000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000000000b8 CR3: 0000000103f90000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 skb_put_data include/linux/skbuff.h:2273 [inline]
 h5_unslip_one_byte drivers/bluetooth/hci_h5.c:527 [inline]
 h5_recv+0x21c/0x260 drivers/bluetooth/hci_h5.c:563
 hci_uart_tty_receive+0xa2/0x1f0 drivers/bluetooth/hci_ldisc.c:613
 tiocsti drivers/tty/tty_io.c:2196 [inline]
 tty_ioctl+0x7ee/0xa30 drivers/tty/tty_io.c:2572
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0xd6/0x110 fs/ioctl.c:739
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d579
Code: 5d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ff11bc96c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000019640 RCX: 000000000045d579
RDX: 0000000020000140 RSI: 0000000000005412 RDI: 0000000000000003
RBP: 00007ff11bc96ca0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fff66b8f05f R14: 00007ff11bc979c0 R15: 000000000118cf4c
Modules linked in:
CR2: 00000000000000b8
---[ end trace e933941ab51992ca ]---
RIP: 0010:skb_tail_pointer include/linux/skbuff.h:2193 [inline]
RIP: 0010:skb_put+0x11/0x60 net/core/skbuff.c:1862
Code: 6c 04 00 85 c0 0f 85 d0 d9 00 00 e8 c9 fa 7a fe 31 c0 c3 66 0f 1f 44 00 00 41 55 41 54 41 89 f4 55 48 89 fd 53 e8 af fa 7a fe <8b> 85 b8 00 00 00 8b 55 74 48 89 c3 48 03 85 c0 00 00 00 85 d2 75
RSP: 0018:ffffc90009207dc0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8881050b0600 RCX: 0000000000000000
RDX: ffff88812a7e5040 RSI: ffffffff82b4aa71 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000200000 R09: 0000000000000000
R10: ffff88810460c198 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000001 R14: ffff888104737400 R15: ffff88812aac4f00
FS:  00007ff11bc97700(0000) GS:ffff88812c100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4026e2f000 CR3: 0000000103f90000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400