loop0: detected capacity change from 0 to 8257
loop5: detected capacity change from 0 to 8257
EXT4-fs (loop4): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock
------------[ cut here ]------------
WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x364/0x400, CPU#1: syz-executor.4/7208
Modules linked in:
CPU: 1 UID: 0 PID: 7208 Comm: syz-executor.4 Not tainted 6.18.0-rc2-next-20251027 #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 91 5b 00 e9 a9 fe ff ff e8 3d b7 1e 00 90 <0f> 0b 90 45 31 e4 e9 3b ff ff ff e8 2c b7 1e 00 90 0f 0b 90 45 31
RSP: 0018:ffff88804a317238 EFLAGS: 00010212
RAX: 0000000000003492 RBX: ffff88804a317350 RCX: ffffc90004eb1000
RDX: 0000000000040000 RSI: ffffffff81555923 RDI: 0000000000000006
RBP: ffff88804a317318 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85d30650
R13: 00003fffffffffff R14: 0000000000000000 R15: 0000000000000000
FS: 00007fc1dbe95700(0000) GS:ffff8880e54f4000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f24d8222000 CR3: 000000000cedb000 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
__ext4_msg+0x17e/0x240
ext4_fill_super+0xafa6/0xb910
get_tree_bdev_flags+0x38a/0x620
vfs_get_tree+0x93/0x340
path_mount+0x720/0x2130
__x64_sys_mount+0x293/0x310
do_syscall_64+0xbf/0x390
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc1de92104a
Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 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:00007fc1dbe94fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007fc1de92104a
RDX: 00000000200007c0 RSI: 0000000020000100 RDI: 00007fc1dbe95000
RBP: 00007fc1dbe95040 R08: 00007fc1dbe95040 R09: 00000000200007c0
R10: 0000000000000000 R11: 0000000000000206 R12: 00000000200007c0
R13: 0000000020000100 R14: 00007fc1dbe95000 R15: 0000000020014d00
irq event stamp: 1465
hardirqs last enabled at (1471): [] vprintk_emit+0x650/0x690
hardirqs last disabled at (1476): [] vprintk_emit+0x5e1/0x690
softirqs last enabled at (1030): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (1019): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
loop3: detected capacity change from 0 to 8257
EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
loop2: detected capacity change from 0 to 4096
EXT4-fs error (device loop0): __ext4_fill_super:5512: inode #2: comm syz-executor.0: iget: special inode unallocated
loop7: detected capacity change from 0 to 8257
loop6: detected capacity change from 0 to 8257
EXT4-fs (loop0): get root inode failed
loop1: detected capacity change from 0 to 8257
EXT4-fs (loop0): mount failed
EXT4-fs error (device loop5): ext4_validate_block_bitmap:440: comm ext4lazyinit: bg 0: block 32: padding at end of block bitmap is not set
EXT4-fs (loop1): ext4_check_descriptors: Checksum for group 0 failed (15558!=0)
EXT4-fs (loop1): group descriptors corrupted!
EXT4-fs error (device loop6): ext4_quota_enable:7136: inode #3: comm syz-executor.6: iget: special inode unallocated
EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
EXT4-fs error (device loop6): ext4_quota_enable:7138: comm syz-executor.6: Bad quota inode: 3, type: 0
EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
EXT4-fs warning (device loop6): ext4_enable_quotas:7176: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix.
loop4: detected capacity change from 0 to 8257
EXT4-fs (loop6): mount failed
EXT4-fs error (device loop3): ext4_quota_enable:7136: inode #3: comm syz-executor.3: iget: special inode unallocated
EXT4-fs (loop4): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock
EXT4-fs (loop4): group descriptors corrupted!
EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs error (device loop3): ext4_quota_enable:7138: comm syz-executor.3: Bad quota inode: 3, type: 0
EXT4-fs warning (device loop3): ext4_enable_quotas:7176: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix.
EXT4-fs (loop3): mount failed
loop7: detected capacity change from 0 to 8257
EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000.
loop1: detected capacity change from 0 to 8257
EXT4-fs (loop1): ext4_check_descriptors: Checksum for group 0 failed (15558!=0)
EXT4-fs (loop1): group descriptors corrupted!
EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000.
loop5: detected capacity change from 0 to 8257
EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000.
loop5: detected capacity change from 0 to 8257
loop3: detected capacity change from 0 to 8257
EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
EXT4-fs error (device loop3): ext4_quota_enable:7136: inode #3: comm syz-executor.3: iget: special inode unallocated
EXT4-fs error (device loop3): ext4_quota_enable:7138: comm syz-executor.3: Bad quota inode: 3, type: 0
EXT4-fs warning (device loop3): ext4_enable_quotas:7176: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix.
EXT4-fs (loop3): mount failed
loop7: detected capacity change from 0 to 8257
loop2: detected capacity change from 0 to 4096
EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000.
loop1: detected capacity change from 0 to 8257
loop6: detected capacity change from 0 to 8257
loop4: detected capacity change from 0 to 8257
EXT4-fs (loop4): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock
EXT4-fs (loop4): group descriptors corrupted!
loop0: detected capacity change from 0 to 8257
EXT4-fs (loop1): ext4_check_descriptors: Checksum for group 0 failed (15558!=0)
EXT4-fs (loop1): group descriptors corrupted!
EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
EXT4-fs error (device loop6): ext4_quota_enable:7136: inode #3: comm syz-executor.6: iget: special inode unallocated
EXT4-fs error (device loop6): ext4_quota_enable:7138: comm syz-executor.6: Bad quota inode: 3, type: 0
loop5: detected capacity change from 0 to 8257
EXT4-fs warning (device loop6): ext4_enable_quotas:7176: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix.
EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
loop3: detected capacity change from 0 to 8257
EXT4-fs error (device loop0): __ext4_fill_super:5512: inode #2: comm syz-executor.0: iget: special inode unallocated
EXT4-fs (loop6): mount failed
EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
EXT4-fs (loop0): get root inode failed
EXT4-fs (loop0): mount failed
EXT4-fs error (device loop3): ext4_quota_enable:7136: inode #3: comm syz-executor.3: iget: special inode unallocated
EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs error (device loop3): ext4_quota_enable:7138: comm syz-executor.3: Bad quota inode: 3, type: 0
EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs warning (device loop3): ext4_enable_quotas:7176: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix.
EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000.
EXT4-fs (loop3): mount failed
loop4: detected capacity change from 0 to 8257
loop0: detected capacity change from 0 to 8257
EXT4-fs (loop4): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock
EXT4-fs (loop4): group descriptors corrupted!
EXT4-fs error (device loop0): __ext4_fill_super:5512: inode #2: comm syz-executor.0: iget: special inode unallocated
EXT4-fs (loop0): get root inode failed
EXT4-fs (loop0): mount failed
loop2: detected capacity change from 0 to 4096
loop1: detected capacity change from 0 to 8257
loop6: detected capacity change from 0 to 8257
loop5: detected capacity change from 0 to 8257
EXT4-fs (loop1): ext4_check_descriptors: Checksum for group 0 failed (15558!=0)
EXT4-fs (loop1): group descriptors corrupted!
EXT4-fs error (device loop6): ext4_quota_enable:7136: inode #3: comm syz-executor.6: iget: special inode unallocated
EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
EXT4-fs error (device loop6): ext4_quota_enable:7138: comm syz-executor.6: Bad quota inode: 3, type: 0
EXT4-fs warning (device loop6): ext4_enable_quotas:7176: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix.
EXT4-fs (loop6): mount failed
EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000.