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Message-ID: <000000000000dfd6a105f71001d7@google.com>
Date: Thu, 16 Mar 2023 20:16:46 -0700
From: syzbot <syzbot+f4582777a19ec422b517@...kaller.appspotmail.com>
To: adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org,
linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
syzkaller-bugs@...glegroups.com, tytso@....edu
Subject: [syzbot] [ext4?] kernel BUG in ext4_write_inline_data
Hello,
syzbot found the following issue on:
HEAD commit: 134231664868 Merge tag 'staging-6.3-rc2' of git://git.kern..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10ec9f7ac80000
kernel config: https://syzkaller.appspot.com/x/.config?x=8aef547e348b1ab8
dashboard link: https://syzkaller.appspot.com/bug?extid=f4582777a19ec422b517
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: i386
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f4582777a19ec422b517@...kaller.appspotmail.com
------------[ cut here ]------------
kernel BUG at fs/ext4/inline.c:225!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 2 PID: 24186 Comm: syz-executor.2 Not tainted 6.3.0-rc1-syzkaller-00274-g134231664868 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:ext4_write_inline_data+0x344/0x3e0 fs/ext4/inline.c:225
Code: 5f e9 b0 16 5b ff e8 ab 16 5b ff 45 8d 64 2c c4 41 bd 3c 00 00 00 41 29 ed e9 e8 fe ff ff e8 93 16 5b ff 0f 0b e8 8c 16 5b ff <0f> 0b e8 a5 5c ac ff e9 fe fd ff ff 4c 89 ff e8 98 5c ac ff e9 99
RSP: 0018:ffffc900035673c0 EFLAGS: 00010216
RAX: 000000000001158c RBX: ffff88801cbb02b0 RCX: ffffc900031ea000
RDX: 0000000000040000 RSI: ffffffff8228bf04 RDI: 0000000000000006
RBP: 0000000000000048 R08: 0000000000000006 R09: 0000000000000051
R10: 0000000000000048 R11: 0000000000000000 R12: 0000000000000009
R13: 0000000000000051 R14: ffffc90003567460 R15: ffff88801cbb0872
FS: 0000000000000000(0000) GS:ffff88802cb00000(0063) knlGS:00000000f7f53b40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000020030018 CR3: 00000000487e6000 CR4: 0000000000150ee0
Call Trace:
<TASK>
ext4_write_inline_data_end+0x2a3/0x12f0 fs/ext4/inline.c:766
ext4_da_write_end+0x396/0x9c0 fs/ext4/inode.c:3149
generic_perform_write+0x316/0x570 mm/filemap.c:3937
ext4_buffered_write_iter+0x15b/0x460 fs/ext4/file.c:289
ext4_file_write_iter+0xbe0/0x1740 fs/ext4/file.c:710
call_write_iter include/linux/fs.h:1851 [inline]
do_iter_readv_writev+0x20b/0x3b0 fs/read_write.c:735
do_iter_write+0x182/0x700 fs/read_write.c:861
vfs_iter_write+0x74/0xa0 fs/read_write.c:902
iter_file_splice_write+0x743/0xc80 fs/splice.c:778
do_splice_from fs/splice.c:856 [inline]
direct_splice_actor+0x114/0x180 fs/splice.c:1022
splice_direct_to_actor+0x335/0x8a0 fs/splice.c:977
do_splice_direct+0x1ab/0x280 fs/splice.c:1065
do_sendfile+0xb19/0x12c0 fs/read_write.c:1255
__do_compat_sys_sendfile fs/read_write.c:1344 [inline]
__se_compat_sys_sendfile fs/read_write.c:1327 [inline]
__ia32_compat_sys_sendfile+0x1e1/0x220 fs/read_write.c:1327
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x65/0xf0 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: 0023:0xf7f58579
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:00000000f7f535cc EFLAGS: 00000296 ORIG_RAX: 00000000000000bb
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000000005
RDX: 0000000000000000 RSI: 0000000080000041 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_write_inline_data+0x344/0x3e0 fs/ext4/inline.c:225
Code: 5f e9 b0 16 5b ff e8 ab 16 5b ff 45 8d 64 2c c4 41 bd 3c 00 00 00 41 29 ed e9 e8 fe ff ff e8 93 16 5b ff 0f 0b e8 8c 16 5b ff <0f> 0b e8 a5 5c ac ff e9 fe fd ff ff 4c 89 ff e8 98 5c ac ff e9 99
RSP: 0018:ffffc900035673c0 EFLAGS: 00010216
RAX: 000000000001158c RBX: ffff88801cbb02b0 RCX: ffffc900031ea000
RDX: 0000000000040000 RSI: ffffffff8228bf04 RDI: 0000000000000006
RBP: 0000000000000048 R08: 0000000000000006 R09: 0000000000000051
R10: 0000000000000048 R11: 0000000000000000 R12: 0000000000000009
R13: 0000000000000051 R14: ffffc90003567460 R15: ffff88801cbb0872
FS: 0000000000000000(0000) GS:ffff88802cb00000(0063) knlGS:00000000f7f53b40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000020030018 CR3: 00000000487e6000 CR4: 0000000000150ee0
----------------
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 retq
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.
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