[ 43.444826] audit: type=1800 audit(1554924603.951:30): pid=7839 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 48.244219] kauditd_printk_skb: 4 callbacks suppressed [ 48.244235] audit: type=1400 audit(1554924608.771:35): avc: denied { map } for pid=8015 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.1.25' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 54.872533] audit: type=1400 audit(1554924615.401:36): avc: denied { map } for pid=8027 comm="syz-executor155" path="/root/syz-executor155910495" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 60.035838] list_del corruption, ffff8880a90efa28->next is LIST_POISON1 (dead000000000100) [ 60.044712] ------------[ cut here ]------------ [ 60.049497] kernel BUG at lib/list_debug.c:45! [ 60.054074] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 60.059426] CPU: 1 PID: 8042 Comm: syz-executor155 Not tainted 4.19.34 #2 [ 60.066334] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.075692] RIP: 0010:__list_del_entry_valid.cold+0x23/0x4f [ 60.081392] Code: e8 b5 de 30 fe 0f 0b 4c 89 f6 48 c7 c7 40 a2 81 87 e8 a4 de 30 fe 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 80 a1 81 87 e8 90 de 30 fe <0f> 0b 4c 89 e2 4c 89 f6 48 c7 c7 e0 a1 81 87 e8 7c de 30 fe 0f 0b [ 60.100310] RSP: 0018:ffff8880a90ef8e8 EFLAGS: 00010082 [ 60.105769] RAX: 000000000000004e RBX: ffff8880a90efa10 RCX: 0000000000000000 [ 60.113024] RDX: 0000000000000000 RSI: ffffffff8155d206 RDI: ffffed101521df0f [ 60.120369] RBP: ffff8880a90ef900 R08: 000000000000004e R09: ffffed1015d24fe9 [ 60.127624] R10: ffffed1015d24fe8 R11: ffff8880ae927f47 R12: dead000000000200 [ 60.134907] R13: dead000000000100 R14: ffff8880a90efa28 R15: ffff8880a90efa30 [ 60.142185] FS: 0000000001f5e880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 60.150399] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.156264] CR2: ffffffffff600400 CR3: 000000008d182000 CR4: 00000000001406e0 [ 60.163534] Call Trace: [ 60.166115] remove_wait_queue+0x2f/0x190 [ 60.170341] ? lock_sock_nested+0xe2/0x120 [ 60.174566] __tipc_sendstream+0x3db/0xaa0 [ 60.178788] ? tipc_connect+0x760/0x760 [ 60.182747] ? do_wait_intr_irq+0x2b0/0x2b0 [ 60.187052] ? __local_bh_enable_ip+0x15a/0x270 [ 60.191723] ? lock_sock_nested+0xe2/0x120 [ 60.196058] ? __local_bh_enable_ip+0x15a/0x270 [ 60.200716] ? __local_bh_enable_ip+0x15a/0x270 [ 60.205383] tipc_sendstream+0x53/0x80 [ 60.209255] ? __tipc_sendstream+0xaa0/0xaa0 [ 60.213656] sock_sendmsg+0xdd/0x130 [ 60.217382] sock_write_iter+0x27c/0x3e0 [ 60.221430] ? sock_sendmsg+0x130/0x130 [ 60.225394] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 60.230934] ? iov_iter_init+0xc6/0x1f0 [ 60.234892] __vfs_write+0x58e/0x820 [ 60.238593] ? kernel_read+0x120/0x120 [ 60.242465] ? selinux_file_permission+0x92/0x550 [ 60.247293] ? security_file_permission+0x8f/0x230 [ 60.252209] ? rw_verify_area+0x118/0x360 [ 60.256340] vfs_write+0x20c/0x560 [ 60.259882] ksys_write+0xea/0x1f0 [ 60.263407] ? __ia32_sys_read+0xb0/0xb0 [ 60.267483] ? do_syscall_64+0x26/0x610 [ 60.271449] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 60.276804] ? do_syscall_64+0x26/0x610 [ 60.280822] __x64_sys_write+0x73/0xb0 [ 60.284708] do_syscall_64+0x103/0x610 [ 60.288598] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 60.293787] RIP: 0033:0x445089 [ 60.297031] Code: e8 fc ab 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 bb cd fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 60.316160] RSP: 002b:00007ffcc581f8c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 60.323884] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000445089 [ 60.331164] RDX: 0000000000152610 RSI: 00000000200000c0 RDI: 0000000000000003 [ 60.338523] RBP: 000000000000d6d7 R08: 0000000b004002e0 R09: 0000000b004002e0 [ 60.345789] R10: 0000000b004002e0 R11: 0000000000000246 R12: 00000000004022d0 [ 60.353054] R13: 0000000000402360 R14: 0000000000000000 R15: 0000000000000000 [ 60.360322] Modules linked in: [ 60.363518] ---[ end trace daeb8fd9afcb1ed7 ]--- [ 60.368275] RIP: 0010:__list_del_entry_valid.cold+0x23/0x4f [ 60.374057] Code: e8 b5 de 30 fe 0f 0b 4c 89 f6 48 c7 c7 40 a2 81 87 e8 a4 de 30 fe 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 80 a1 81 87 e8 90 de 30 fe <0f> 0b 4c 89 e2 4c 89 f6 48 c7 c7 e0 a1 81 87 e8 7c de 30 fe 0f 0b [ 60.393048] RSP: 0018:ffff8880a90ef8e8 EFLAGS: 00010082 [ 60.398399] RAX: 000000000000004e RBX: ffff8880a90efa10 RCX: 0000000000000000 [ 60.406339] RDX: 0000000000000000 RSI: ffffffff8155d206 RDI: ffffed101521df0f [ 60.413616] RBP: ffff8880a90ef900 R08: 000000000000004e R09: ffffed1015d24fe9 [ 60.420903] R10: ffffed1015d24fe8 R11: ffff8880ae927f47 R12: dead000000000200 [ 60.428177] R13: dead000000000100 R14: ffff8880a90efa28 R15: ffff8880a90efa30 [ 60.435518] FS: 0000000001f5e880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 60.443801] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.449690] CR2: ffffffffff600400 CR3: 000000008d182000 CR4: 00000000001406e0 [ 60.457126] Kernel panic - not syncing: Fatal exception [ 60.463582] Kernel Offset: disabled [ 60.467226] Rebooting in 86400 seconds..