EXT4-fs error (device loop6): ext4_map_blocks:637: inode #11: block 327694: comm syz.6.314: lblock 0 mapped to illegal pblock 327694 (length 1)
------------[ cut here ]------------
EA inode 11 i_nlink=2
WARNING: CPU: 1 PID: 5851 at fs/ext4/xattr.c:1006 ext4_xattr_inode_update_ref+0x454/0x498 fs/ext4/xattr.c:1004
Modules linked in:
CPU: 1 PID: 5851 Comm: syz.6.314 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : ext4_xattr_inode_update_ref+0x454/0x498 fs/ext4/xattr.c:1004
lr : ext4_xattr_inode_update_ref+0x454/0x498 fs/ext4/xattr.c:1004
sp : ffff800020b47020
x29: ffff800020b470c0 x28: 0000000000000000 x27: 1fffe0001c4e4599
x26: ffff0000e2722b10 x25: dfff800000000000 x24: ffff800020b47040
x23: ffff700004168e08 x22: ffff800017cfe000 x21: 0000000000000002
x20: 0000000000000001 x19: ffff0000e2722ad0 x18: 1fffe00033e8417e
x17: ffff80001532d000 x16: ffff8000082dcf38 x15: ffff00019f420bfc
x14: 0000000000000001 x13: 1fffe0001aa0e490 x12: 0000000000000000
x11: 0000000000000000 x10: ffff60001aa0e491 x9 : 095ecbcb33ee2600
x8 : 095ecbcb33ee2600 x7 : ffff80000825ab3c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff800008249808
x2 : 0000000000000001 x1 : 0000000000000004 x0 : 0000000000000001
Call trace:
 ext4_xattr_inode_update_ref+0x454/0x498 fs/ext4/xattr.c:1004
 ext4_xattr_inode_dec_ref fs/ext4/xattr.c:1029 [inline]
 ext4_xattr_inode_dec_ref_all+0x854/0xe20 fs/ext4/xattr.c:1175
 ext4_xattr_delete_inode+0x890/0xa20 fs/ext4/xattr.c:2898
 ext4_evict_inode+0xc70/0x1264 fs/ext4/inode.c:298
 evict+0x3d8/0x824 fs/inode.c:705
 iput_final fs/inode.c:1834 [inline]
 iput+0x728/0x7e8 fs/inode.c:1860
 ext4_process_orphan+0x24c/0x2c0 fs/ext4/orphan.c:358
 ext4_orphan_cleanup+0x964/0x1090 fs/ext4/orphan.c:472
 __ext4_fill_super fs/ext4/super.c:5574 [inline]
 ext4_fill_super+0x5af8/0x63bc fs/ext4/super.c:5693
 get_tree_bdev+0x35c/0x54c fs/super.c:1366
 ext4_get_tree+0x28/0x38 fs/ext4/super.c:5723
 vfs_get_tree+0x90/0x278 fs/super.c:1573
 do_new_mount+0x228/0x804 fs/namespace.c:3078
 path_mount+0x5ac/0xe6c fs/namespace.c:3408
 do_mount fs/namespace.c:3421 [inline]
 __do_sys_mount fs/namespace.c:3629 [inline]
 __se_sys_mount fs/namespace.c:3606 [inline]
 __arm64_sys_mount+0x4a0/0x5a0 fs/namespace.c:3606
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
irq event stamp: 3172
hardirqs last  enabled at (3171): [<ffff80000825abd0>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1374 [inline]
hardirqs last  enabled at (3171): [<ffff80000825abd0>] finish_lock_switch+0xb0/0x1c8 kernel/sched/core.c:5004
hardirqs last disabled at (3172): [<ffff800011b3a55c>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (3158): [<ffff8000081ae3b4>] softirq_handle_end kernel/softirq.c:439 [inline]
softirqs last  enabled at (3158): [<ffff8000081ae3b4>] handle_softirqs+0xb1c/0xc90 kernel/softirq.c:624
softirqs last disabled at (3061): [<ffff800008020e6c>] __do_softirq+0x14/0x20 kernel/softirq.c:630
---[ end trace 0000000000000000 ]---
EXT4-fs (loop6): 1 orphan inode deleted
EXT4-fs (loop6): mounted filesystem without journal. Quota mode: none.