EXT4-fs (loop7): get root inode failed EXT4-fs (loop7): mount failed EXT4-fs (loop2): corrupt root inode, run e2fsck EXT4-fs (loop2): mount failed ------------[ cut here ]------------ WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x364/0x400, CPU#0: syz-executor.4/24531 Modules linked in: CPU: 0 UID: 0 PID: 24531 Comm: syz-executor.4 Not tainted 6.18.0-rc2-next-20251024 #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 37 89 5b 00 e9 a9 fe ff ff e8 fd b6 1e 00 90 <0f> 0b 90 45 31 e4 e9 3b ff ff ff e8 ec b6 1e 00 90 0f 0b 90 45 31 RSP: 0018:ffff88804bf970a8 EFLAGS: 00010212 RAX: 0000000000001f27 RBX: ffff88804bf971c0 RCX: ffffc90003dfc000 RDX: 0000000000040000 RSI: ffffffff81555423 RDI: 0000000000000006 RBP: ffff88804bf97188 R08: 0000000000000d05 R09: 00000114047da924 R10: 0000000000000000 R11: 00005fd3c200002e R12: ffffffff85d30690 R13: 00003fffffffffff R14: 0000000000000000 R15: 0000000000000000 FS: 00007fbd5d4c5700(0000) GS:ffff8880e53f4000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbd5d4c4fe8 CR3: 0000000048230000 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: 0033:0x7fbd5ff4f8d7 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:00007fbd5d4c4f48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fbd5ff99970 RCX: 00007fbd5ff4f8d7 RDX: 0000000000000003 RSI: 0000000000004c00 RDI: 0000000000000004 RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000003 R14: 0000000020000248 R15: 0000000000000003 irq event stamp: 1837 hardirqs last enabled at (1843): [] vprintk_emit+0x650/0x690 hardirqs last disabled at (1850): [] vprintk_emit+0x5e1/0x690 softirqs last enabled at (1646): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (1625): [] __irq_exit_rcu+0xc4/0x100 ---[ end trace 0000000000000000 ]--- EXT4-fs (loop4): fragment/cluster size (65536) != block size (4096) loop2: detected capacity change from 0 to 4096 loop4: detected capacity change from 0 to 4096 loop1: detected capacity change from 0 to 4096 loop0: detected capacity change from 0 to 4096 EXT4-fs (loop2): corrupt root inode, run e2fsck EXT4-fs (loop2): mount failed loop7: detected capacity change from 0 to 4096 loop3: detected capacity change from 0 to 4096 EXT4-fs (loop4): fragment/cluster size (65536) != block size (4096) EXT4-fs error (device loop7): __ext4_fill_super:5512: inode #2: comm syz-executor.7: iget: special inode unallocated EXT4-fs (loop7): get root inode failed EXT4-fs (loop7): mount failed EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs warning (device loop3): read_mmp_block:114: Error -117 while reading MMP block 0 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop3: detected capacity change from 0 to 4096 loop1: detected capacity change from 0 to 4096 loop0: detected capacity change from 0 to 4096 loop4: detected capacity change from 0 to 4096 loop2: detected capacity change from 0 to 4096 EXT4-fs (loop4): fragment/cluster size (65536) != block size (4096) EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop3): fragment/cluster size (65536) != block size (4096) loop7: detected capacity change from 0 to 4096 EXT4-fs (loop2): corrupt root inode, run e2fsck EXT4-fs (loop2): mount failed EXT4-fs error (device loop7): __ext4_fill_super:5512: inode #2: comm syz-executor.7: iget: special inode unallocated EXT4-fs (loop7): get root inode failed EXT4-fs (loop7): mount failed loop4: detected capacity change from 0 to 4096 EXT4-fs (loop4): fragment/cluster size (65536) != block size (4096) EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.