bisecting fixing commit since ad326970d25cc85128cd22d62398751ad072efff building syzkaller on ff4a3345a1b2a40ff1b8b983153d0b1fcc72f1c5 testing commit ad326970d25cc85128cd22d62398751ad072efff with gcc (GCC) 8.1.0 kernel signature: 93ab88cbae9cc7d9d65e254681a1c5497c1621515a7a741451694aa922fe6914 run #0: crashed: BUG: corrupted list in remove_wait_queue run #1: crashed: BUG: corrupted list in remove_wait_queue run #2: crashed: BUG: corrupted list in remove_wait_queue run #3: crashed: BUG: corrupted list in remove_wait_queue run #4: crashed: BUG: corrupted list in remove_wait_queue run #5: crashed: BUG: corrupted list in remove_wait_queue run #6: crashed: BUG: corrupted list in remove_wait_queue run #7: crashed: BUG: corrupted list in corrupted run #8: crashed: BUG: corrupted list in corrupted run #9: crashed: BUG: corrupted list in corrupted testing current HEAD 13d2ce42de8cb98ff952f8de6307f896203854c2 testing commit 13d2ce42de8cb98ff952f8de6307f896203854c2 with gcc (GCC) 8.1.0 kernel signature: 5c9f0b816a1d86a8bdcefd606f554994fa3d7e44b24d4014d36054797382f1f0 run #0: crashed: BUG: corrupted list in remove_wait_queue run #1: crashed: BUG: corrupted list in remove_wait_queue run #2: crashed: BUG: corrupted list in remove_wait_queue run #3: crashed: BUG: corrupted list in remove_wait_queue run #4: crashed: BUG: corrupted list in remove_wait_queue run #5: crashed: BUG: corrupted list in remove_wait_queue run #6: crashed: BUG: corrupted list in remove_wait_queue run #7: crashed: BUG: corrupted list in remove_wait_queue run #8: crashed: BUG: corrupted list in corrupted run #9: crashed: BUG: corrupted list in corrupted revisions tested: 2, total time: 38m57.49228628s (build: 18m50.263679953s, test: 19m26.14225077s) the crash still happens on HEAD commit msg: Linux 4.19.163 crash: BUG: corrupted list in corrupted bond0 (unregistering): Releasing backup interface bond_slave_0 bond0 (unregistering): Released all slaves list_del corruption, ffff8881e04c7640->next is LIST_POISON1 (dead000000000100) ------------[ cut here ]------------ list_del corruption, ffff8881e0847640->next is LIST_POISON1 (dead000000000100) kernel BUG at lib/list_debug.c:47! ------------[ cut here ]------------ invalid opcode: 0000 [#1] PREEMPT SMP KASAN kernel BUG at lib/list_debug.c:47! CPU: 0 PID: 20570 Comm: syz-executor336 Not tainted 4.19.163-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 lib/list_debug.c:45 Code: 00 fe 0f 0b 4c 89 e2 48 89 de 48 c7 c7 20 5d 8b 87 e8 16 af 00 fe 0f 0b 4c 89 ea 48 89 de 48 c7 c7 c0 5c 8b 87 e8 02 af 00 fe <0f> 0b 48 89 de 48 c7 c7 e0 5d 8b 87 e8 f1 ae 00 fe 0f 0b 48 89 de RSP: 0018:ffff8881e04c74d0 EFLAGS: 00010086 RAX: 000000000000004e RBX: ffff8881e04c7640 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff878b5a20 RDI: ffffffff8a3e1a60 RBP: ffff8881e04c74e8 R08: ffffed103ecc5081 R09: ffffed103ecc5080 R10: ffffed103ecc5080 R11: ffff8881f6628407 R12: dead000000000200 R13: dead000000000100 R14: ffff8881e9fab480 R15: ffff8881ec6f9280 FS: 00007fd27429c700(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002001d06c CR3: 00000001dd711006 CR4: 00000000001606f0 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+0x30/0x1b0 kernel/sched/wait.c:44 tipc_send_group_bcast+0x33a/0xa10 net/tipc/socket.c:1022 tipc_send_group_mcast net/tipc/socket.c:1109 [inline] __tipc_sendmsg+0x44a/0x12f0 net/tipc/socket.c:1317 tipc_sendmsg+0x4b/0x70 net/tipc/socket.c:1276 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xac/0xf0 net/socket.c:632 ___sys_sendmsg+0x28e/0x950 net/socket.c:2115 __sys_sendmmsg+0x160/0x370 net/socket.c:2210 __do_sys_sendmmsg net/socket.c:2239 [inline] __se_sys_sendmmsg net/socket.c:2236 [inline] __x64_sys_sendmmsg+0x98/0x100 net/socket.c:2236 do_syscall_64+0xd0/0x4e0 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:00007fd27429bdb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446a09 RDX: 08000000000000b0 RSI: 0000000020000a40 RDI: 0000000000000004 RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c R13: 00007fffb76d6f9f R14: 00007fd27429c9c0 R15: 000000000000002d Modules linked in: ---[ end trace ec3d8d1cca7a2f42 ]--- invalid opcode: 0000 [#2] PREEMPT SMP KASAN RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 lib/list_debug.c:45 CPU: 1 PID: 20562 Comm: syz-executor336 Tainted: G D 4.19.163-syzkaller #0 Code: 00 fe 0f 0b 4c 89 e2 48 89 de 48 c7 c7 20 5d 8b 87 e8 16 af 00 fe 0f 0b 4c 89 ea 48 89 de 48 c7 c7 c0 5c 8b 87 e8 02 af 00 fe <0f> 0b 48 89 de 48 c7 c7 e0 5d 8b 87 e8 f1 ae 00 fe 0f 0b 48 89 de Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RSP: 0018:ffff8881e04c74d0 EFLAGS: 00010086 RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 lib/list_debug.c:45 RAX: 000000000000004e RBX: ffff8881e04c7640 RCX: 0000000000000000 Code: 00 fe 0f 0b 4c 89 e2 48 89 de 48 c7 c7 20 5d 8b 87 e8 16 af 00 fe 0f 0b 4c 89 ea 48 89 de 48 c7 c7 c0 5c 8b 87 e8 02 af 00 fe <0f> 0b 48 89 de 48 c7 c7 e0 5d 8b 87 e8 f1 ae 00 fe 0f 0b 48 89 de RDX: 0000000000000000 RSI: ffffffff878b5a20 RDI: ffffffff8a3e1a60 RSP: 0018:ffff8881e08474d0 EFLAGS: 00010086 RBP: ffff8881e04c74e8 R08: ffffed103ecc5081 R09: ffffed103ecc5080 R10: ffffed103ecc5080 R11: ffff8881f6628407 R12: dead000000000200 RAX: 000000000000004e RBX: ffff8881e0847640 RCX: 0000000000000000 R13: dead000000000100 R14: ffff8881e9fab480 R15: ffff8881ec6f9280 RDX: 0000000000000000 RSI: ffffffff878b5a20 RDI: ffffffff8a3e1a60 FS: 00007fd27429c700(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000 RBP: ffff8881e08474e8 R08: ffffed103ece5081 R09: ffffed103ece5080 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 R10: ffffed103ece5080 R11: ffff8881f6728407 R12: dead000000000200 CR2: 000000002001d06c CR3: 00000001dd711006 CR4: 00000000001606f0 R13: dead000000000100 R14: ffff8881cea86f00 R15: ffff8881d2057240 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 FS: 00007fd27429c700(0000) GS:ffff8881f6700000(0000) knlGS:0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400