ax25_connect(): syz-executor5 uses autobind, please contact jreuter@yaina.de ax25_connect(): syz-executor4 uses autobind, please contact jreuter@yaina.de kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN kobject: 'loop5' (000000000a8c8c40): kobject_uevent_env CPU: 0 PID: 13309 Comm: syz-executor0 Not tainted 4.20.0+ #3 kobject: 'loop5' (000000000a8c8c40): fill_kobj_path: path = '/devices/virtual/block/loop5' Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ax25_send_control+0x5a/0x560 net/ax25/ax25_subr.c:155 Code: ff df 48 c1 ea 03 80 3c 02 00 0f 85 b1 04 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 65 28 49 8d 7c 24 08 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 83 04 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b RSP: 0018:ffff888042c377f8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000043 RCX: ffffc90005de9000 RDX: 0000000000000001 RSI: ffffffff87058725 RDI: 0000000000000008 RBP: ffff888042c37830 R08: ffff888064a5c380 R09: ffff888064a5cc48 R10: ffff888064a5c380 R11: 0000000000000000 R12: 0000000000000000 kobject: 'loop4' (000000005a2eed4e): kobject_uevent_env R13: ffff88808baaa040 R14: 0000000000000001 R15: ffff88808baaa068 FS: 00007f25a1e3a700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001f01e80 CR3: 00000000a4311000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 kobject: 'loop4' (000000005a2eed4e): fill_kobj_path: path = '/devices/virtual/block/loop4' DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ax25_release+0x503/0x680 net/ax25/af_ax25.c:974 __sock_release+0xd3/0x250 net/socket.c:579 sock_close+0x1b/0x30 net/socket.c:1141 __fput+0x3c5/0xaf0 fs/file_table.c:278 ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x1f4/0x2b0 kernel/task_work.c:113 get_signal+0x168d/0x19b0 kernel/signal.c:2347 do_signal+0x91/0x1e80 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2f7/0x3b0 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x696/0x800 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457ec9 Code: 6d b7 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f25a1e39c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000457ec9 RDX: 0000000000000048 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f25a1e3a6d4 R13: 00000000004be2ae R14: 00000000004ce648 R15: 00000000ffffffff Modules linked in: ---[ end trace dcff9655958a2d47 ]--- RIP: 0010:ax25_send_control+0x5a/0x560 net/ax25/ax25_subr.c:155 Code: ff df 48 c1 ea 03 80 3c 02 00 0f 85 b1 04 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 65 28 49 8d 7c 24 08 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 83 04 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b RSP: 0018:ffff888042c377f8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000043 RCX: ffffc90005de9000 RDX: 0000000000000001 RSI: ffffffff87058725 RDI: 0000000000000008 RBP: ffff888042c37830 R08: ffff888064a5c380 R09: ffff888064a5cc48 R10: ffff888064a5c380 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88808baaa040 R14: 0000000000000001 R15: ffff88808baaa068 FS: 00007f25a1e3a700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff3c6de5db8 CR3: 00000000a4311000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400