loop2: detected capacity change from 0 to 512
EXT4-fs (loop5): invalid first ino: 0
loop7: detected capacity change from 0 to 512
------------[ cut here ]------------
WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x364/0x400, CPU#0: syz-executor.3/9186
Modules linked in:
CPU: 0 UID: 0 PID: 9186 Comm: syz-executor.3 Not tainted 6.18.0-rc3-next-20251029 #1 PREEMPT(voluntary)
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:get_data+0x364/0x400
Code: e8 83 e0 07 83 c0 03 38 d0 0f 8c be fe ff ff 84 d2 0f 84 b6 fe ff ff 48 89 ef e8 47 9e 5b 00 e9 a9 fe ff ff e8 3d bb 1e 00 90 <0f> 0b 90 45 31 e4 e9 3b ff ff ff e8 2c bb 1e 00 90 0f 0b 90 45 31
RSP: 0018:ffff88804b8770a8 EFLAGS: 00010216
RAX: 00000000000023ef RBX: ffff88804b8771c0 RCX: ffffc90002ea1000
RDX: 0000000000040000 RSI: ffffffff815557a3 RDI: 0000000000000006
RBP: ffff88804b877188 R08: 0000000000000d33 R09: 000001078f521eff
R10: 0000000000000000 R11: 000023e2c200002d R12: ffffffff85d30650
R13: 00003fffffffffff R14: 0000000000000000 R15: 0000000000000000
FS: 00007f955d044700(0000) GS:ffff8880e53f1000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d820000 CR3: 000000004c311000 CR4: 0000000000350ef0
Call Trace:
_prb_read_valid+0x2f3/0x830
prb_read_valid+0x78/0xa0
printk_get_next_message+0x10b/0x570
console_flush_one_record+0x64f/0xb20
__console_flush_and_unlock+0xb1/0x1d0
vprintk_emit+0x4c1/0x690
_printk+0xbe/0xf0
set_capacity_and_notify+0x16a/0x240
loop_configure+0xcbd/0x15a0
lo_ioctl+0x66d/0x1ca0
blkdev_ioctl+0x365/0x6d0
__x64_sys_ioctl+0x18f/0x210
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f955face8d7
Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 a4 54 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f955d043f48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f955fb18970 RCX: 00007f955face8d7
RDX: 0000000000000003 RSI: 0000000000004c00 RDI: 0000000000000004
RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000003 R14: 0000000020000290 R15: 0000000000000006
irq event stamp: 845
hardirqs last enabled at (851): [] vprintk_emit+0x650/0x690
hardirqs last disabled at (870): [] vprintk_emit+0x5e1/0x690
softirqs last enabled at (866): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (855): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
ext4 filesystem being mounted at /syzkaller-testdir780575634/syzkaller.qfMLdW/178/file0 supports timestamps until 2038-01-19 (0x7fffffff)
EXT4-fs (loop7): VFS: Can't find ext4 filesystem
ext4 filesystem being mounted at /syzkaller-testdir577317640/syzkaller.ZojEYn/183/file0 supports timestamps until 2038-01-19 (0x7fffffff)
loop5: detected capacity change from 0 to 512
EXT4-fs (loop5): invalid first ino: 0
EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop3): VFS: Can't find ext4 filesystem
loop2: detected capacity change from 0 to 512
loop5: detected capacity change from 0 to 512
loop6: detected capacity change from 0 to 512
EXT4-fs (loop5): invalid first ino: 0
EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
ext4 filesystem being mounted at /syzkaller-testdir577317640/syzkaller.ZojEYn/184/file0 supports timestamps until 2038-01-19 (0x7fffffff)
EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
ext4 filesystem being mounted at /syzkaller-testdir780575634/syzkaller.qfMLdW/179/file0 supports timestamps until 2038-01-19 (0x7fffffff)
loop3: detected capacity change from 0 to 512
EXT4-fs (loop3): invalid first ino: 0
EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000.
loop7: detected capacity change from 0 to 512
EXT4-fs (loop7): VFS: Can't find ext4 filesystem
EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000.
loop2: detected capacity change from 0 to 512
loop6: detected capacity change from 0 to 512
EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
loop5: detected capacity change from 0 to 512
EXT4-fs (loop6): VFS: Can't find ext4 filesystem
ext4 filesystem being mounted at /syzkaller-testdir780575634/syzkaller.qfMLdW/180/file0 supports timestamps until 2038-01-19 (0x7fffffff)
EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
ext4 filesystem being mounted at /syzkaller-testdir720945894/syzkaller.xuxu3d/202/file0 supports timestamps until 2038-01-19 (0x7fffffff)
loop3: detected capacity change from 0 to 512
EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop3): invalid first ino: 0
loop6: detected capacity change from 0 to 512
loop7: detected capacity change from 0 to 512
EXT4-fs (loop6): VFS: Can't find ext4 filesystem
loop2: detected capacity change from 0 to 512
EXT4-fs (loop7): VFS: Can't find ext4 filesystem
EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
ext4 filesystem being mounted at /syzkaller-testdir780575634/syzkaller.qfMLdW/181/file0 supports timestamps until 2038-01-19 (0x7fffffff)
EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000.
loop2: detected capacity change from 0 to 512
EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
ext4 filesystem being mounted at /syzkaller-testdir780575634/syzkaller.qfMLdW/182/file0 supports timestamps until 2038-01-19 (0x7fffffff)
EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000.
loop7: detected capacity change from 0 to 512
EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000.
loop3: detected capacity change from 0 to 512
loop6: detected capacity change from 0 to 512
EXT4-fs (loop3): invalid first ino: 0
EXT4-fs (loop6): VFS: Can't find ext4 filesystem
loop5: detected capacity change from 0 to 512
EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
ext4 filesystem being mounted at /syzkaller-testdir720945894/syzkaller.xuxu3d/203/file0 supports timestamps until 2038-01-19 (0x7fffffff)
EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000.