IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 PGD afde5067 P4D afde5067 PUD a49f8067 PMD 0 Oops: 0002 [#1] PREEMPT SMP KASAN CPU: 0 PID: 8385 Comm: syz-executor.0 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:test_and_set_bit arch/x86/include/asm/bitops.h:209 [inline] RIP: 0010:test_and_set_bit_lock arch/x86/include/asm/bitops.h:223 [inline] RIP: 0010:trylock_buffer include/linux/buffer_head.h:367 [inline] RIP: 0010:lock_buffer include/linux/buffer_head.h:373 [inline] RIP: 0010:udf_getblk+0x1c1/0x390 fs/udf/inode.c:464 Code: e5 01 89 ee e8 90 f5 f2 fe 40 84 ed 0f 84 00 01 00 00 e8 52 f4 f2 fe 31 d2 be 74 01 00 00 48 c7 c7 a0 80 9a 88 e8 ff e3 d1 fe 49 0f ba 2c 24 02 40 0f 92 c5 31 ff 89 ee e8 5b f5 f2 fe 40 84 RSP: 0018:ffff888098a7ef58 EFLAGS: 00010246 RAX: 0000000000000007 RBX: 1ffff1101314fded RCX: 0000000000000001 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff8880ab3645a4 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 00000000d9777620 R12: 0000000000000000 R13: ffff888089c1cbc0 R14: ffff888089c1cbe8 R15: dffffc0000000000 FS: 00007f074fc95700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000009d0a3000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: udf_bread+0x85/0x240 fs/udf/inode.c:1206 udf_add_entry+0xfda/0x2a20 fs/udf/namei.c:509 udf_add_nondir+0xf9/0x400 fs/udf/namei.c:602 udf_create+0x130/0x180 fs/udf/namei.c:639 lookup_open+0x893/0x1a20 fs/namei.c:3235 do_last fs/namei.c:3327 [inline] path_openat+0x1094/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 file_open_name+0x269/0x380 fs/open.c:1032 filp_open+0x47/0x70 fs/open.c:1052 do_coredump+0x1fb2/0x2d60 fs/coredump.c:717 get_signal+0xed9/0x1f70 kernel/signal.c:2583 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f07504d4707 Code: 08 89 3c 24 48 89 4c 24 18 e8 e5 f8 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 48 8b 74 24 08 8b 3c 24 b8 12 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 04 24 e8 15 f9 ff ff 48 8b RSP: 002b:00007f074fc94f00 EFLAGS: 00000293 ORIG_RAX: 0000000000000012 RAX: ffffffffffffffe5 RBX: 0000000000000027 RCX: 00007f07504d4707 RDX: 00000000000000c0 RSI: 00000000200102c0 RDI: 0000000000000006 RBP: 0000000000000006 R08: 0000000000000000 R09: 0000000000000000 R10: 0000007375622f2e R11: 0000000000000293 R12: 0000000000000006 R13: 00000000200002f0 R14: 000000000000000a R15: 00007f075056ca20 Modules linked in: CR2: 0000000000000000 ---[ end trace 2493d191c40d941c ]--- RIP: 0010:test_and_set_bit arch/x86/include/asm/bitops.h:209 [inline] RIP: 0010:test_and_set_bit_lock arch/x86/include/asm/bitops.h:223 [inline] RIP: 0010:trylock_buffer include/linux/buffer_head.h:367 [inline] RIP: 0010:lock_buffer include/linux/buffer_head.h:373 [inline] RIP: 0010:udf_getblk+0x1c1/0x390 fs/udf/inode.c:464 Code: e5 01 89 ee e8 90 f5 f2 fe 40 84 ed 0f 84 00 01 00 00 e8 52 f4 f2 fe 31 d2 be 74 01 00 00 48 c7 c7 a0 80 9a 88 e8 ff e3 d1 fe 49 0f ba 2c 24 02 40 0f 92 c5 31 ff 89 ee e8 5b f5 f2 fe 40 84 RSP: 0018:ffff888098a7ef58 EFLAGS: 00010246 RAX: 0000000000000007 RBX: 1ffff1101314fded RCX: 0000000000000001 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff8880ab3645a4 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 00000000d9777620 R12: 0000000000000000 R13: ffff888089c1cbc0 R14: ffff888089c1cbe8 R15: dffffc0000000000 FS: 00007f074fc95700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000009d0a3000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: e5 01 in $0x1,%eax 2: 89 ee mov %ebp,%esi 4: e8 90 f5 f2 fe callq 0xfef2f599 9: 40 84 ed test %bpl,%bpl c: 0f 84 00 01 00 00 je 0x112 12: e8 52 f4 f2 fe callq 0xfef2f469 17: 31 d2 xor %edx,%edx 19: be 74 01 00 00 mov $0x174,%esi 1e: 48 c7 c7 a0 80 9a 88 mov $0xffffffff889a80a0,%rdi 25: e8 ff e3 d1 fe callq 0xfed1e429 * 2a: f0 49 0f ba 2c 24 02 lock btsq $0x2,(%r12) <-- trapping instruction 31: 40 0f 92 c5 setb %bpl 35: 31 ff xor %edi,%edi 37: 89 ee mov %ebp,%esi 39: e8 5b f5 f2 fe callq 0xfef2f599 3e: 40 rex 3f: 84 .byte 0x84