audit: type=1400 audit(1603210668.023:8): avc: denied { execmem } for pid=6498 comm="syz-executor994" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 hrtimer: interrupt took 74548 ns list_del corruption, ffff88809df7f738->next is LIST_POISON1 (dead000000000100) ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:45! invalid opcode: 0000 [#1] PREEMPT SMP KASAN list_del corruption, ffff8880a41f7738->next is LIST_POISON1 (dead000000000100) CPU: 0 PID: 6520 Comm: syz-executor994 Not tainted 4.19.152-syzkaller #0 ------------[ cut here ]------------ Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 kernel BUG at lib/list_debug.c:45! RIP: 0010:__list_del_entry_valid.cold+0x2c/0x43 lib/list_debug.c:45 Code: e2 48 c7 c7 a0 f6 51 88 e8 d3 a3 b8 fd 0f 0b 48 c7 c7 e0 4e 18 8a e8 76 73 13 00 4c 89 ea 48 c7 c7 40 f6 51 88 e8 b6 a3 b8 fd <0f> 0b 48 c7 c7 20 4f 18 8a e8 59 73 13 00 90 90 90 90 90 90 90 90 RSP: 0018:ffff88809df7f610 EFLAGS: 00010086 RAX: 000000000000004e RBX: ffff88809df7f720 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff815b62af RDI: ffffed1013befeb4 RBP: ffff88812c3bf840 R08: 000000000000004e R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000002 R12: dead000000000200 R13: dead000000000100 R14: ffff88809df7f740 R15: 0000000000000007 FS: 00007fcd6bea9700(0000) GS:ffff8880ae200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcd6bea8e78 CR3: 000000009a224000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_del_entry include/linux/list.h:117 [inline] list_del include/linux/list.h:125 [inline] __remove_wait_queue include/linux/wait.h:184 [inline] remove_wait_queue+0x2c/0x180 kernel/sched/wait.c:44 tipc_send_group_bcast+0x34f/0xa60 net/tipc/socket.c:1022 __tipc_sendmsg+0xa2b/0x1320 net/tipc/socket.c:1311 tipc_sendmsg+0x4c/0x70 net/tipc/socket.c:1276 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xc7/0x130 net/socket.c:632 ___sys_sendmsg+0x3b3/0x8f0 net/socket.c:2115 __sys_sendmmsg+0x195/0x470 net/socket.c:2210 __do_sys_sendmmsg net/socket.c:2239 [inline] __se_sys_sendmmsg net/socket.c:2236 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2236 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x446a09 Code: e8 0c e8 ff ff 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 db 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fcd6bea8db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 0000000000446a09 RDX: 08000000000000b0 RSI: 0000000020000a40 RDI: 0000000000000004 RBP: 00000000006dbc30 R08: 00007fcd6bea9700 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc3c R13: 00007ffe587ab8ef R14: 00007fcd6bea99c0 R15: 000000000000002d Modules linked in: ---[ end trace 0274629412f205c4 ]--- invalid opcode: 0000 [#2] PREEMPT SMP KASAN RIP: 0010:__list_del_entry_valid.cold+0x2c/0x43 lib/list_debug.c:45 CPU: 1 PID: 6522 Comm: syz-executor994 Tainted: G D 4.19.152-syzkaller #0 Code: e2 48 c7 c7 a0 f6 51 88 e8 d3 a3 b8 fd 0f 0b 48 c7 c7 e0 4e 18 8a e8 76 73 13 00 4c 89 ea 48 c7 c7 40 f6 51 88 e8 b6 a3 b8 fd <0f> 0b 48 c7 c7 20 4f 18 8a e8 59 73 13 00 90 90 90 90 90 90 90 90 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RSP: 0018:ffff88809df7f610 EFLAGS: 00010086 RIP: 0010:__list_del_entry_valid.cold+0x2c/0x43 lib/list_debug.c:45 RAX: 000000000000004e RBX: ffff88809df7f720 RCX: 0000000000000000 Code: e2 48 c7 c7 a0 f6 51 88 e8 d3 a3 b8 fd 0f 0b 48 c7 c7 e0 4e 18 8a e8 76 73 13 00 4c 89 ea 48 c7 c7 40 f6 51 88 e8 b6 a3 b8 fd <0f> 0b 48 c7 c7 20 4f 18 8a e8 59 73 13 00 90 90 90 90 90 90 90 90 RDX: 0000000000000000 RSI: ffffffff815b62af RDI: ffffed1013befeb4 RSP: 0018:ffff8880a41f7610 EFLAGS: 00010086 RBP: ffff88812c3bf840 R08: 000000000000004e R09: 0000000000000000 RAX: 000000000000004e RBX: ffff8880a41f7720 RCX: 0000000000000000 R10: 0000000000000005 R11: 0000000000000002 R12: dead000000000200 RDX: 0000000000000000 RSI: ffffffff815b62af RDI: ffffed101483eeb4 R13: dead000000000100 R14: ffff88809df7f740 R15: 0000000000000007 RBP: ffff88809ec36240 R08: 000000000000004e R09: 0000000000000000 FS: 00007fcd6bea9700(0000) GS:ffff8880ae200000(0000) knlGS:0000000000000000 R10: 0000000000000005 R11: 000000001e407abb R12: dead000000000200 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 R13: dead000000000100 R14: ffff8880a41f7740 R15: 0000000000000007 CR2: 00007fcd6bea8e78 CR3: 000000009a224000 CR4: 00000000001406f0 FS: 00007fcd6bea9700(0000) GS:ffff8880ae300000(0000) knlGS:0000000000000000 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 CR2: 00000000004ccc50 CR3: 0000000094e69000 CR4: 00000000001406e0