audit: type=1804 audit(1618285798.633:16363): pid=26295 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir079698379/syzkaller.1TWlSC/148/file0/bus" dev="ramfs" ino=375701 res=1 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 26292 at net/kcm/kcmsock.c:629 kcm_write_msgs.cold+0x112/0x13f net/kcm/kcmsock.c:629 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 26292 Comm: syz-executor.5 Not tainted 4.19.186-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 panic+0x26a/0x50e kernel/panic.c:186 __warn.cold+0x20/0x5a kernel/panic.c:541 report_bug+0x262/0x2b0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296 audit: type=1804 audit(1618285798.693:16364): pid=26295 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.3" name="/root/syzkaller-testdir079698379/syzkaller.1TWlSC/148/file0/bus" dev="ramfs" ino=375701 res=1 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038 RIP: 0010:kcm_write_msgs.cold+0x112/0x13f net/kcm/kcmsock.c:629 Code: c7 44 24 58 00 00 00 00 48 8b 80 50 02 00 00 48 89 44 24 28 e9 65 c5 4a ff e8 a4 0e 50 f9 48 c7 c7 e0 da 61 89 e8 fd f6 df ff <0f> 0b 8b 44 24 70 41 bc ea ff ff ff 89 44 24 58 e9 3f c6 4a ff e8 RSP: 0018:ffff88808fe2f988 EFLAGS: 00010282 RAX: 0000000000000024 RBX: 00000000000000c0 RCX: 0000000000000000 RDX: 000000000000cd6c RSI: ffffffff814dddb1 RDI: ffffed1011fc5f23 RBP: ffff888040ec2640 R08: 0000000000000024 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000008000 R13: ffff88803cc4dbc0 R14: ffff888040ec2580 R15: 0000000000000000 kcm_push net/kcm/kcmsock.c:753 [inline] kcm_sendmsg+0x19cf/0x20f0 net/kcm/kcmsock.c:927 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:632 sock_write_iter+0x287/0x3c0 net/socket.c:901 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x51b/0x770 fs/read_write.c:487 vfs_write+0x1f3/0x540 fs/read_write.c:549 ksys_write+0x12b/0x2a0 fs/read_write.c:599 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x466459 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f49a7bf9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459 RDX: 0000000000000011 RSI: 0000000000000000 RDI: 0000000000000006 RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffc96a2664f R14: 00007f49a7bf9300 R15: 0000000000022000 Kernel Offset: disabled Rebooting in 86400 seconds..