audit: type=1804 audit(1555918540.543:199): pid=7543 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op="invalid_pcr" cause="open_writers" comm="syz-executor722" name="/root/bus" dev="sda1" ino=2233 res=1 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7543 at fs/direct-io.c:293 dio_complete+0x671/0x800 fs/direct-io.c:293 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 7543 Comm: syz-executor722 Not tainted 4.14.113 #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x138/0x19c lib/dump_stack.c:53 panic+0x1f2/0x438 kernel/panic.c:182 __warn.cold+0x2f/0x34 kernel/panic.c:546 report_bug+0x216/0x254 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:177 [inline] fixup_bug arch/x86/kernel/traps.c:172 [inline] do_error_trap+0x1bb/0x310 arch/x86/kernel/traps.c:295 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:944 RIP: 0010:dio_complete+0x671/0x800 fs/direct-io.c:293 RSP: 0018:ffff88808671f1b8 EFLAGS: 00010297 RAX: ffff888086166700 RBX: 0000000000010000 RCX: ffff888086166f80 RDX: 0000000000000000 RSI: ffffffff8778ece0 RDI: ffff888088df037c RBP: ffff88808671f200 R08: ffff888086166700 R09: ffff888086166fc8 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a0806440 R13: 0000000000010000 R14: ffff888088df0578 R15: 0000000000000000 do_blockdev_direct_IO+0x530e/0x7fc0 fs/direct-io.c:1374 __blockdev_direct_IO+0xa1/0xd0 fs/direct-io.c:1400 ext4_direct_IO_write fs/ext4/inode.c:3697 [inline] ext4_direct_IO+0x70d/0x1890 fs/ext4/inode.c:3827 generic_file_direct_write+0x1ec/0x430 mm/filemap.c:2927 __generic_file_write_iter+0x2bc/0x5b0 mm/filemap.c:3106 ext4_file_write_iter+0x2c0/0xfd0 fs/ext4/file.c:264 call_write_iter include/linux/fs.h:1774 [inline] do_iter_readv_writev+0x41e/0x680 fs/read_write.c:674 do_iter_write fs/read_write.c:953 [inline] do_iter_write+0x154/0x550 fs/read_write.c:934 vfs_iter_write+0x77/0xb0 fs/read_write.c:966 iter_file_splice_write+0x578/0xae0 fs/splice.c:749 do_splice_from fs/splice.c:851 [inline] direct_splice_actor+0x126/0x1a0 fs/splice.c:1018 splice_direct_to_actor+0x2a1/0x7b0 fs/splice.c:973 do_splice_direct+0x18d/0x230 fs/splice.c:1061 do_sendfile+0x4db/0xbd0 fs/read_write.c:1440 SYSC_sendfile64 fs/read_write.c:1501 [inline] SyS_sendfile64+0x102/0x110 fs/read_write.c:1487 do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4480a9 RSP: 002b:00007f36dd142ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00000000006ddc68 RCX: 00000000004480a9 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000003 RBP: 00000000006ddc60 R08: 0000000000000000 R09: 0000000000000000 R10: 00008000fffffffe R11: 0000000000000246 R12: 00000000006ddc6c R13: 00007fff8d266c9f R14: 00007f36dd1439c0 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds..