syzbot


WARNING in floppy_revalidate

Status: upstream: reported C repro on 2022/03/17 07:33
Reported-by: syzbot+c5732f0517748c2c8051@syzkaller.appspotmail.com
First crash: 199d, last: 28d
Patch testing requests:
Created Duration User Patch Repo Result
2022/08/31 08:27 23m upstream report log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 3729 at drivers/block/floppy.c:1000 schedule_bh drivers/block/floppy.c:1000 [inline]
WARNING: CPU: 1 PID: 3729 at drivers/block/floppy.c:1000 process_fd_request drivers/block/floppy.c:2851 [inline]
WARNING: CPU: 1 PID: 3729 at drivers/block/floppy.c:1000 floppy_revalidate.isra.0+0x841/0xae0 drivers/block/floppy.c:4195
Modules linked in:
CPU: 1 PID: 3729 Comm: syz-executor117 Not tainted 5.17.0-rc7-syzkaller-00235-gaad611a868d1 #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:2851 [inline]
RIP: 0010:floppy_revalidate.isra.0+0x841/0xae0 drivers/block/floppy.c:4195
Code: 0f 0b e9 30 f9 ff ff 48 89 de 48 c7 c7 80 7b 6a 8c e8 63 d7 84 ff e9 84 f8 ff ff e8 b9 48 42 fd e9 11 fb ff ff e8 cf 62 fb fc <0f> 0b e9 16 fc ff ff e8 c3 62 fb fc 48 83 fb 07 0f 87 3b 02 00 00
RSP: 0018:ffffc900026ef8b0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff888025c14200 RSI: ffffffff847c92c1 RDI: 0000000000000003
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8c6ae647
R10: ffffffff847c8ed5 R11: 0000000000000000 R12: ffffffff90804b10
R13: ffff888011a38800 R14: 0000000000000050 R15: 0000000000000001
FS:  000055555708b300(0000) GS:ffff88802cb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020002e48 CR3: 000000001c6d3000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 floppy_open+0xac5/0xd70 drivers/block/floppy.c:4041
 blkdev_get_whole+0x99/0x2d0 block/bdev.c:666
 blkdev_get_by_dev.part.0+0x5c6/0xc70 block/bdev.c:813
 blkdev_get_by_dev+0x6b/0x80 block/bdev.c:847
 blkdev_open+0x154/0x2e0 block/fops.c:503
 do_dentry_open+0x4b9/0x1250 fs/open.c:824
 do_open fs/namei.c:3476 [inline]
 path_openat+0x1c9e/0x2940 fs/namei.c:3609
 do_filp_open+0x1aa/0x400 fs/namei.c:3636
 do_sys_openat2+0x16d/0x4d0 fs/open.c:1214
 do_sys_open fs/open.c:1230 [inline]
 __do_sys_openat fs/open.c:1246 [inline]
 __se_sys_openat fs/open.c:1241 [inline]
 __x64_sys_openat+0x13f/0x1f0 fs/open.c:1241
 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: 0033:0x7f6b20681597
Code: 25 00 00 41 00 3d 00 00 41 00 74 47 64 8b 04 25 18 00 00 00 85 c0 75 6b 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 95 00 00 00 48 8b 4c 24 28 64 48 2b 0c 25
RSP: 002b:00007ffd9192d9d0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f6b20681597
RDX: 0000000000000000 RSI: 00007ffd9192da50 RDI: 00000000ffffff9c
RBP: 00007ffd9192da50 R08: 000000000000ffff R09: 00007ffd9192d8e0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
 </TASK>

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-qemu-upstream 2022/03/13 07:24 upstream aad611a868d1 9e8eaa75 .config log report syz C WARNING in floppy_revalidate
* Struck through repros no longer work on HEAD.