* [syzbot] WARNING in __floppy_read_block_0
@ 2022-04-22 7:55 syzbot
2022-05-27 3:39 ` syzbot
0 siblings, 1 reply; 2+ messages in thread
From: syzbot @ 2022-04-22 7:55 UTC (permalink / raw)
To: axboe, efremov, linux-block, linux-kernel, syzkaller-bugs
Hello,
syzbot found the following issue on:
HEAD commit: b2d229d4ddb1 Linux 5.18-rc3
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10b813f0f00000
kernel config: https://syzkaller.appspot.com/x/.config?x=dd7c9a79dfcfa205
dashboard link: https://syzkaller.appspot.com/bug?extid=bac6723617710898abd3
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
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+bac6723617710898abd3@syzkaller.appspotmail.com
------------[ cut here ]------------
WARNING: CPU: 2 PID: 22697 at drivers/block/floppy.c:1000 schedule_bh drivers/block/floppy.c:1000 [inline]
WARNING: CPU: 2 PID: 22697 at drivers/block/floppy.c:1000 process_fd_request drivers/block/floppy.c:2849 [inline]
WARNING: CPU: 2 PID: 22697 at drivers/block/floppy.c:1000 __floppy_read_block_0.isra.0+0x292/0x330 drivers/block/floppy.c:4141
Modules linked in:
CPU: 2 PID: 22697 Comm: syz-executor.3 Not tainted 5.18.0-rc3-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:schedule_bh drivers/block/floppy.c:1000 [inline]
RIP: 0010:process_fd_request drivers/block/floppy.c:2849 [inline]
RIP: 0010:__floppy_read_block_0.isra.0+0x292/0x330 drivers/block/floppy.c:4141
Code: 84 24 b8 01 00 00 65 48 2b 04 25 28 00 00 00 0f 85 a0 00 00 00 48 81 c4 c0 01 00 00 5b 5d 41 5c 41 5d 41 5e c3 e8 1e 1e f0 fc <0f> 0b e9 5a ff ff ff e8 e2 12 3b fd e9 7c fe ff ff e8 08 1e f0 fc
RSP: 0018:ffffc90021f2f6c0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 1ffff920043e5ed8 RCX: 0000000000000000
RDX: ffff888019a48080 RSI: ffffffff84882ff2 RDI: 0000000000000003
RBP: ffffea0001593300 R08: 0000000000000000 R09: ffffffff8c8b3f27
R10: ffffffff84882f4a R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000001 R14: dffffc0000000000 R15: 0000000000000001
FS: 00007fce8416d700(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5e5a11efc0 CR3: 000000006ad68000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
floppy_revalidate.isra.0+0x801/0xae0 drivers/block/floppy.c:4187
floppy_open+0xac5/0xd70 drivers/block/floppy.c:4039
blkdev_get_whole+0x99/0x2d0 block/bdev.c:666
blkdev_get_by_dev.part.0+0x5d2/0xc80 block/bdev.c:816
blkdev_get_by_dev+0x6b/0x80 block/bdev.c:850
blkdev_open+0x13c/0x2c0 block/fops.c:498
do_dentry_open+0x4a1/0x11e0 fs/open.c:824
do_open fs/namei.c:3476 [inline]
path_openat+0x1c71/0x2910 fs/namei.c:3609
do_filp_open+0x1aa/0x400 fs/namei.c:3636
do_sys_openat2+0x16d/0x4c0 fs/open.c:1213
do_sys_open fs/open.c:1229 [inline]
__do_sys_openat fs/open.c:1245 [inline]
__se_sys_openat fs/open.c:1240 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1240
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fce8303c004
Code: 84 00 00 00 00 00 44 89 54 24 0c e8 96 f9 ff ff 44 8b 54 24 0c 44 89 e2 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 89 44 24 0c e8 c8 f9 ff ff 8b 44
RSP: 002b:00007fce8416cca0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00007fce8303c004
RDX: 0000000000000000 RSI: 00007fce8416cd40 RDI: 00000000ffffff9c
RBP: 00007fce8416cd40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007ffe79dbf38f R14: 00007fce8416d300 R15: 0000000000022000
</TASK>
---
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@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [syzbot] WARNING in __floppy_read_block_0
2022-04-22 7:55 [syzbot] WARNING in __floppy_read_block_0 syzbot
@ 2022-05-27 3:39 ` syzbot
0 siblings, 0 replies; 2+ messages in thread
From: syzbot @ 2022-05-27 3:39 UTC (permalink / raw)
To: axboe, efremov, linux-block, linux-kernel, syzkaller-bugs
syzbot has found a reproducer for the following issue on:
HEAD commit: babf0bb978e3 Merge tag 'xfs-5.19-for-linus' of git://git.k..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1256f1d3f00000
kernel config: https://syzkaller.appspot.com/x/.config?x=fb7a468cb4ea251
dashboard link: https://syzkaller.appspot.com/bug?extid=bac6723617710898abd3
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: i386
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1107de15f00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1104a36df00000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+bac6723617710898abd3@syzkaller.appspotmail.com
------------[ cut here ]------------
WARNING: CPU: 1 PID: 3673 at drivers/block/floppy.c:999 schedule_bh drivers/block/floppy.c:999 [inline]
WARNING: CPU: 1 PID: 3673 at drivers/block/floppy.c:999 process_fd_request drivers/block/floppy.c:2847 [inline]
WARNING: CPU: 1 PID: 3673 at drivers/block/floppy.c:999 __floppy_read_block_0.isra.0+0x292/0x330 drivers/block/floppy.c:4160
Modules linked in:
CPU: 1 PID: 3673 Comm: syz-executor234 Not tainted 5.18.0-syzkaller-07857-gbabf0bb978e3 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:schedule_bh drivers/block/floppy.c:999 [inline]
RIP: 0010:process_fd_request drivers/block/floppy.c:2847 [inline]
RIP: 0010:__floppy_read_block_0.isra.0+0x292/0x330 drivers/block/floppy.c:4160
Code: 84 24 b8 01 00 00 65 48 2b 04 25 28 00 00 00 0f 85 a0 00 00 00 48 81 c4 c0 01 00 00 5b 5d 41 5c 41 5d 41 5e c3 e8 9e 76 e1 fc <0f> 0b e9 5a ff ff ff e8 62 bc 2d fd e9 7c fe ff ff e8 88 76 e1 fc
RSP: 0018:ffffc90002b3f6a0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 1ffff92000567ed4 RCX: 0000000000000000
RDX: ffff888015c3bb00 RSI: ffffffff849851d2 RDI: 0000000000000003
RBP: ffffea000068d3c0 R08: 0000000000000000 R09: ffffffff8c8e8b47
R10: ffffffff8498512a R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000001 R14: dffffc0000000000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff88802cb00000(0063) knlGS:00000000570f32c0
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f7f88ca8 CR3: 0000000018139000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
floppy_revalidate.isra.0+0x801/0xae0 drivers/block/floppy.c:4206
floppy_open+0xac5/0xd70 drivers/block/floppy.c:4058
blkdev_get_whole+0x99/0x2d0 block/bdev.c:673
blkdev_get_by_dev.part.0+0x5ec/0xb90 block/bdev.c:823
blkdev_get_by_dev+0x6b/0x80 block/bdev.c:857
blkdev_open+0x13c/0x2c0 block/fops.c:481
do_dentry_open+0x4a1/0x11e0 fs/open.c:824
do_open fs/namei.c:3477 [inline]
path_openat+0x1c71/0x2910 fs/namei.c:3610
do_filp_open+0x1aa/0x400 fs/namei.c:3637
do_sys_openat2+0x16d/0x4c0 fs/open.c:1213
do_sys_open fs/open.c:1229 [inline]
__do_compat_sys_openat fs/open.c:1289 [inline]
__se_compat_sys_openat fs/open.c:1287 [inline]
__ia32_compat_sys_openat+0x13f/0x1f0 fs/open.c:1287
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+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x53/0x62
RIP: 0023:0xf7f15549
Code: 03 74 c0 01 10 05 03 74 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 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:00000000ffb136c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 00000000ffb13710
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000f7fbe000
RBP: 0000000066666667 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
----------------
Code disassembly (best guess):
0: 03 74 c0 01 add 0x1(%rax,%rax,8),%esi
4: 10 05 03 74 b8 01 adc %al,0x1b87403(%rip) # 0x1b8740d
a: 10 06 adc %al,(%rsi)
c: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi
10: 10 07 adc %al,(%rdi)
12: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi
16: 10 08 adc %cl,(%rax)
18: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi
1c: 00 00 add %al,(%rax)
1e: 00 00 add %al,(%rax)
20: 00 51 52 add %dl,0x52(%rcx)
23: 55 push %rbp
24: 89 e5 mov %esp,%ebp
26: 0f 34 sysenter
28: cd 80 int $0x80
* 2a: 5d pop %rbp <-- trapping instruction
2b: 5a pop %rdx
2c: 59 pop %rcx
2d: c3 retq
2e: 90 nop
2f: 90 nop
30: 90 nop
31: 90 nop
32: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
39: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
^ permalink raw reply [flat|nested] 2+ messages in thread
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2022-04-22 7:55 [syzbot] WARNING in __floppy_read_block_0 syzbot
2022-05-27 3:39 ` syzbot
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