IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready 9pnet: p9_errstr2errno: server reported unknown error øÀ0/flô list_del corruption, ffff8801ad045e28->next is LIST_POISON1 (dead000000000100) IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:47! invalid opcode: 0000 [#1] SMP KASAN CPU: 0 PID: 4718 Comm: kworker/0:3 Not tainted 4.18.0+ #203 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events p9_read_work RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 lib/list_debug.c:45 Code: 02 fe 0f 0b 4c 89 e2 48 89 de 48 c7 c7 e0 b1 3a 87 e8 2a 2f 02 fe 0f 0b 4c 89 ea 48 89 de 48 c7 c7 80 b1 3a 87 e8 16 2f 02 fe <0f> 0b 48 89 de 48 c7 c7 a0 b2 3a 87 e8 05 2f 02 fe 0f 0b 48 89 de RSP: 0018:ffff88019216f5b0 EFLAGS: 00010286 RAX: 000000000000004e RBX: ffff8801ad045e28 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8163a2b1 RDI: 0000000000000001 RBP: ffff88019216f5c8 R08: ffff8801d984e000 R09: ffffed003b605008 R10: ffffed003b605008 R11: ffff8801db028047 R12: dead000000000200 R13: dead000000000100 R14: ffff8801c2b18090 R15: ffff8801c2b18050 FS: 0000000000000000(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000705138 CR3: 00000001961f5000 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] p9_read_work+0xab4/0x1100 net/9p/trans_fd.c:379 process_one_work+0xc73/0x1aa0 kernel/workqueue.c:2153 worker_thread+0x189/0x13c0 kernel/workqueue.c:2296 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 Modules linked in: Dumping ftrace buffer: --------------------------------- syz-exec-9840 0...2 260238424us : 0: u000000000a3d7036 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syz-exec-9840 0.N.2 260244136us : 0: u000000000a3d7036 --------------------------------- ---[ end trace e8560573107ab905 ]--- RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 lib/list_debug.c:45 Code: 02 fe 0f 0b 4c 89 e2 48 89 de 48 c7 c7 e0 b1 3a 87 e8 2a 2f 02 fe 0f 0b 4c 89 ea 48 89 de 48 c7 c7 80 b1 3a 87 e8 16 2f 02 fe <0f> 0b 48 89 de 48 c7 c7 a0 b2 3a 87 e8 05 2f 02 fe 0f 0b 48 89 de RSP: 0018:ffff88019216f5b0 EFLAGS: 00010286 RAX: 000000000000004e RBX: ffff8801ad045e28 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8163a2b1 RDI: 0000000000000001 sg_write: data in/out 65244/78 bytes for SCSI command 0x0-- guessing data in; program syz-executor4 not setting count and/or reply_len properly RBP: ffff88019216f5c8 R08: ffff8801d984e000 R09: ffffed003b605008 R10: ffffed003b605008 R11: ffff8801db028047 R12: dead000000000200 R13: dead000000000100 R14: ffff8801c2b18090 R15: ffff8801c2b18050 FS: 0000000000000000(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000705138 CR3: 00000001961f5000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400