EXT4-fs (loop6): group descriptors corrupted! loop7: detected capacity change from 0 to 512 loop4: 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.2/6979 Modules linked in: CPU: 0 UID: 0 PID: 6979 Comm: syz-executor.2 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:ffff88804a2b7238 EFLAGS: 00010212 RAX: 0000000000002802 RBX: ffff88804a2b7350 RCX: ffffc900054b4000 RDX: 0000000000040000 RSI: ffffffff81555923 RDI: 0000000000000006 RBP: ffff88804a2b7318 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85d30650 R13: 00003fffffffffff R14: 0000000000000000 R15: 0000000000000000 FS: 00007f9696272700(0000) GS:ffff8880e53f4000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1373116004 CR3: 0000000013fe5000 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+0xb333/0xb910 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: 0033:0x7f9698cfe04a 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:00007f9696271fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f9698cfe04a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f9696272000 RBP: 00007f9696272040 R08: 00007f9696272040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f9696272000 R15: 0000000020013c00 irq event stamp: 1605 hardirqs last enabled at (1611): [] vprintk_emit+0x650/0x690 hardirqs last disabled at (1616): [] vprintk_emit+0x5e1/0x690 softirqs last enabled at (1516): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (1465): [] __irq_exit_rcu+0xc4/0x100 ---[ end trace 0000000000000000 ]--- EXT4-fs (loop7): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop2): group descriptors corrupted! EXT4-fs (loop7): group descriptors corrupted! EXT4-fs (loop5): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop5): group descriptors corrupted! EXT4-fs (loop4): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop4): group descriptors corrupted! loop3: detected capacity change from 0 to 512 loop0: detected capacity change from 0 to 512 EXT4-fs (loop3): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop3): group descriptors corrupted! loop6: detected capacity change from 0 to 512 EXT4-fs (loop0): ext4_check_descriptors: Inode table for group 0 overlaps superblock EXT4-fs (loop0): group descriptors corrupted! EXT4-fs (loop6): ext4_check_descriptors: Inode table for group 0 overlaps superblock EXT4-fs (loop6): group descriptors corrupted! loop2: detected capacity change from 0 to 512 loop5: detected capacity change from 0 to 512 EXT4-fs (loop2): ext4_check_descriptors: Inode table for group 0 overlaps superblock EXT4-fs (loop2): group descriptors corrupted! EXT4-fs (loop5): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop5): group descriptors corrupted! loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop1): group descriptors corrupted! loop6: detected capacity change from 0 to 512 loop2: detected capacity change from 0 to 512 loop1: detected capacity change from 0 to 512 loop3: detected capacity change from 0 to 512 loop7: detected capacity change from 0 to 512 loop4: detected capacity change from 0 to 512 loop0: detected capacity change from 0 to 512 EXT4-fs (loop6): ext4_check_descriptors: Inode table for group 0 overlaps superblock EXT4-fs (loop6): group descriptors corrupted! EXT4-fs (loop2): ext4_check_descriptors: Inode table for group 0 overlaps superblock EXT4-fs (loop2): group descriptors corrupted! EXT4-fs (loop4): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock loop5: detected capacity change from 0 to 512 EXT4-fs (loop4): group descriptors corrupted! EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop0): group descriptors corrupted! EXT4-fs (loop1): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop1): group descriptors corrupted! EXT4-fs (loop3): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop3): group descriptors corrupted! EXT4-fs (loop7): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop7): group descriptors corrupted! EXT4-fs (loop5): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop5): group descriptors corrupted! loop2: detected capacity change from 0 to 512 loop4: detected capacity change from 0 to 512 EXT4-fs (loop2): ext4_check_descriptors: Inode table for group 0 overlaps superblock loop6: detected capacity change from 0 to 512 EXT4-fs (loop2): group descriptors corrupted! loop1: detected capacity change from 0 to 512 EXT4-fs (loop6): ext4_check_descriptors: Inode table for group 0 overlaps superblock EXT4-fs (loop6): group descriptors corrupted! EXT4-fs (loop4): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop4): group descriptors corrupted! loop3: detected capacity change from 0 to 512 EXT4-fs (loop1): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop1): group descriptors corrupted! loop0: detected capacity change from 0 to 512 EXT4-fs (loop3): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop3): group descriptors corrupted! EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock EXT4-fs (loop0): group descriptors corrupted!