audit: type=1804 audit(1546320512.243:1133): pid=17478 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor3" name="/root/syzkaller-testdir684935791/syzkaller.rVHBOz/532/bus" dev="sda1" ino=16900 res=1
WARNING: CPU: 1 PID: 17475 at fs/ext4/inode.c:945 ext4_dio_get_block_overwrite fs/ext4/inode.c:945 [inline]
WARNING: CPU: 1 PID: 17475 at fs/ext4/inode.c:945 ext4_dio_get_block_overwrite+0xb7/0xf0 fs/ext4/inode.c:930
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 17475 Comm: syz-executor3 Not tainted 4.20.0+ #2
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+0x1db/0x2d0 lib/dump_stack.c:113
 panic+0x2cb/0x589 kernel/panic.c:189
 __warn.cold+0x20/0x4b kernel/panic.c:544
 report_bug+0x263/0x2b0 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+0x11b/0x200 arch/x86/kernel/traps.c:271
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973
RIP: 0010:ext4_dio_get_block_overwrite fs/ext4/inode.c:945 [inline]
RIP: 0010:ext4_dio_get_block_overwrite+0xb7/0xf0 fs/ext4/inode.c:930
Code: 0f 95 66 ff 84 db 74 1d e8 c6 93 66 ff 49 8b 1c 24 31 ff 48 c1 eb 0c 83 e3 01 89 de e8 f2 94 66 ff 84 db 74 07 e8 a9 93 66 ff <0f> 0b e8 a2 93 66 ff 44 89 e8 5b 41 5c 41 5d 41 5e 5d c3 e8 91 93
RSP: 0018:ffff8880a48969f0 EFLAGS: 00010206
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9000c012000
RDX: 0000000000013160 RSI: ffffffff821aee07 RDI: 0000000000000001
RBP: ffff8880a4896a10 R08: ffff88809dd5c700 R09: ffffed1011504eda
R10: ffffed1011504ed9 R11: ffff88808a8276cf R12: ffff8880a4896c70
R13: 0000000000000000 R14: 0000000000000007 R15: 0000000000000001
 get_more_blocks fs/direct-io.c:716 [inline]
 do_direct_IO fs/direct-io.c:1001 [inline]
 do_blockdev_direct_IO+0x3822/0xdc10 fs/direct-io.c:1333
 __blockdev_direct_IO+0xa1/0xca fs/direct-io.c:1419
 ext4_direct_IO_write fs/ext4/inode.c:3774 [inline]
 ext4_direct_IO+0x142d/0x2090 fs/ext4/inode.c:3901
 generic_file_direct_write+0x214/0x4b0 mm/filemap.c:3111
 __generic_file_write_iter+0x2ee/0x630 mm/filemap.c:3290
 ext4_file_write_iter+0x37a/0x1410 fs/ext4/file.c:266
 call_write_iter include/linux/fs.h:1862 [inline]
 do_iter_readv_writev+0x902/0xbc0 fs/read_write.c:680
 do_iter_write fs/read_write.c:959 [inline]
 do_iter_write+0x184/0x610 fs/read_write.c:940
 vfs_iter_write+0x77/0xb0 fs/read_write.c:972
 iter_file_splice_write+0x885/0xfc0 fs/splice.c:749
 do_splice_from fs/splice.c:851 [inline]
 direct_splice_actor+0x126/0x1a0 fs/splice.c:1023
 splice_direct_to_actor+0x3be/0x9d0 fs/splice.c:978
 do_splice_direct+0x2c7/0x420 fs/splice.c:1066
 do_sendfile+0x61a/0xe60 fs/read_write.c:1439
 __do_sys_sendfile64 fs/read_write.c:1500 [inline]
 __se_sys_sendfile64 fs/read_write.c:1486 [inline]
 __x64_sys_sendfile64+0x1f8/0x240 fs/read_write.c:1486
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457ec9
Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f8a59557c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457ec9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000003
RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000a5cc54d R11: 0000000000000246 R12: 00007f8a595586d4
R13: 00000000004c4b6b R14: 00000000004d8278 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..