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Message-ID: <00000000000069c5b30600ab98f3@google.com>
Date: Mon, 17 Jul 2023 02:40:56 -0700
From: syzbot <syzbot+c73388acf8b6a00343a4@...kaller.appspotmail.com>
To: almaz.alexandrovich@...agon-software.com,
linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
llvm@...ts.linux.dev, nathan@...nel.org, ndesaulniers@...gle.com,
ntfs3@...ts.linux.dev, syzkaller-bugs@...glegroups.com,
trix@...hat.com
Subject: [syzbot] [ntfs3?] kernel BUG in __blockdev_direct_IO
Hello,
syzbot found the following issue on:
HEAD commit: eb26cbb1a754 Merge tag 'platform-drivers-x86-v6.5-2' of gi..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14b3886ca80000
kernel config: https://syzkaller.appspot.com/x/.config?x=87ef4ae61b35aae1
dashboard link: https://syzkaller.appspot.com/bug?extid=c73388acf8b6a00343a4
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: i386
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-eb26cbb1.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/64d2eea7ee5e/vmlinux-eb26cbb1.xz
kernel image: https://storage.googleapis.com/syzbot-assets/2dbe6b1755b5/bzImage-eb26cbb1.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c73388acf8b6a00343a4@...kaller.appspotmail.com
------------[ cut here ]------------
kernel BUG at fs/direct-io.c:1025!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 3 PID: 18918 Comm: syz-executor.2 Not tainted 6.5.0-rc1-syzkaller-00033-geb26cbb1a754 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:do_direct_IO fs/direct-io.c:1025 [inline]
RIP: 0010:__blockdev_direct_IO+0x2dc3/0x3cf0 fs/direct-io.c:1248
Code: f3 ed 8a ff 41 83 ff 1f 0f 87 2b bb 21 08 e8 74 f2 8a ff b8 01 00 00 00 44 89 f9 d3 e0 8d 68 ff e9 26 d7 ff ff e8 5d f2 8a ff <0f> 0b e8 56 f2 8a ff 8b 9c 24 a8 01 00 00 31 ff 89 de e8 b6 ed 8a
RSP: 0018:ffffc900291cf1c0 EFLAGS: 00010246
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9000656a000
RDX: 0000000000040000 RSI: ffffffff81fac443 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000009401a R12: 0000000000000000
R13: ffffea0001705040 R14: 0000000000000009 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff88802c900000(0063) knlGS:00000000f7f8fb40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000056d1e04c CR3: 000000004efc7000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
blockdev_direct_IO include/linux/fs.h:2830 [inline]
ntfs_direct_IO+0x271/0x470 fs/ntfs3/inode.c:788
generic_file_direct_write+0x132/0x360 mm/filemap.c:3848
__generic_file_write_iter+0x11d/0x240 mm/filemap.c:4004
ntfs_file_write_iter+0xd20/0x1bf0 fs/ntfs3/file.c:1081
call_write_iter include/linux/fs.h:1871 [inline]
do_iter_readv_writev+0x208/0x3b0 fs/read_write.c:735
do_iter_write+0x17f/0x830 fs/read_write.c:860
vfs_iter_write+0x7a/0xb0 fs/read_write.c:901
iter_file_splice_write+0x666/0xba0 fs/splice.c:739
do_splice_from fs/splice.c:934 [inline]
direct_splice_actor+0x118/0x180 fs/splice.c:1143
splice_direct_to_actor+0x347/0xa30 fs/splice.c:1089
do_splice_direct+0x1af/0x280 fs/splice.c:1195
do_sendfile+0xb70/0x1370 fs/read_write.c:1254
__do_compat_sys_sendfile fs/read_write.c:1343 [inline]
__se_compat_sys_sendfile fs/read_write.c:1326 [inline]
__ia32_compat_sys_sendfile+0x1da/0x220 fs/read_write.c:1326
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x61/0xe0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x70/0x82
RIP: 0023:0xf7f94579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f7f8f5ac EFLAGS: 00000292 ORIG_RAX: 00000000000000bb
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000000005
RDX: 0000000000000000 RSI: 000000007fffffff RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:do_direct_IO fs/direct-io.c:1025 [inline]
RIP: 0010:__blockdev_direct_IO+0x2dc3/0x3cf0 fs/direct-io.c:1248
Code: f3 ed 8a ff 41 83 ff 1f 0f 87 2b bb 21 08 e8 74 f2 8a ff b8 01 00 00 00 44 89 f9 d3 e0 8d 68 ff e9 26 d7 ff ff e8 5d f2 8a ff <0f> 0b e8 56 f2 8a ff 8b 9c 24 a8 01 00 00 31 ff 89 de e8 b6 ed 8a
RSP: 0018:ffffc900291cf1c0 EFLAGS: 00010246
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9000656a000
RDX: 0000000000040000 RSI: ffffffff81fac443 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000009401a R12: 0000000000000000
R13: ffffea0001705040 R14: 0000000000000009 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff88802c900000(0063) knlGS:00000000f7f8fb40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000056d1e04c CR3: 000000004efc7000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 10 06 adc %al,(%rsi)
2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi
6: 10 07 adc %al,(%rdi)
8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi
c: 10 08 adc %cl,(%rax)
e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi
1e: 00 51 52 add %dl,0x52(%rcx)
21: 55 push %rbp
22: 89 e5 mov %esp,%ebp
24: 0f 34 sysenter
26: cd 80 int $0x80
* 28: 5d pop %rbp <-- trapping instruction
29: 5a pop %rdx
2a: 59 pop %rcx
2b: c3 ret
2c: 90 nop
2d: 90 nop
2e: 90 nop
2f: 90 nop
30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@...glegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the bug is already fixed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to change bug's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
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