WARNING in ext4_xattr_block_set

Status: upstream: reported C repro on 2025/09/18 02:40
Bug presence: origin:upstream
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+e0bc42dc6050f6711adb@syzkaller.appspotmail.com
First crash: 323d, last: 30d
▶ ▼ Bug presence (3)
Date Name Commit Repro Result
2025/11/05 linux-6.1.y (ToT) f6e38ae624cf C [report] WARNING in ext4_xattr_block_set
2025/09/21 upstream (ToT) f975f08c2e89 C [report] WARNING in ext4_xattr_block_set
2025/11/05 upstream (ToT) 1c353dc8d962 C Didn't crash
▶ ▼ Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in ext4_xattr_block_set (3) ext4 -1 syz, C error 73 294d 324d 29/29 fixed on 2025/10/29 21:02
upstream WARNING in ext4_xattr_block_set ext4 -1 syz, C error 57 1265d 1372d 22/29 fixed on 2023/02/24 13:50
upstream WARNING in ext4_xattr_block_set (2) ext4 -1 syz, C error 32 1183d 1248d 22/29 fixed on 2023/07/01 16:05
linux-6.6 WARNING in ext4_xattr_block_set -1 syz, C done 23 302d 325d 2/2 fixed on 2025/11/14 12:22
▶ ▼ Fix bisection attempts (5)
Created Duration User Patch Repo Result
2026/07/05 10:17 2h21m fix candidate upstream OK (0) job log
2026/05/11 15:08 18m fix candidate upstream error job log
2026/03/25 22:32 1m fix candidate upstream error job log
2026/02/23 17:57 1m fix candidate upstream error job log
2026/01/24 12:36 8m fix candidate upstream error job log

Sample crash report:
loop0: detected capacity change from 0 to 512
EXT4-fs (loop0): orphan cleanup on readonly fs
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4519 at fs/ext4/xattr.c:1865 ext4_xattr_block_set+0x20bc/0x28b4 fs/ext4/xattr.c:1865
Modules linked in:
CPU: 0 PID: 4519 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : ext4_xattr_block_set+0x20bc/0x28b4 fs/ext4/xattr.c:1865
lr : ext4_xattr_block_set+0x20bc/0x28b4 fs/ext4/xattr.c:1865
sp : ffff800021656f40
x29: ffff8000216570d0 x28: ffff0000d52d9400 x27: ffff0000d6a14000
x26: ffff800021657220 x25: dfff800000000000 x24: ffff0000d52d9400
x23: 1ffff000042cae46 x22: ffff800021657230 x21: 1ffff000042cae45
x20: ffff800021657228 x19: 0000000000000000 x18: 1fffe00033e7277e
x17: ffff80001537d000 x16: ffff8000082dba2c x15: 0000000000000000
x14: 0000000000000005 x13: 00000000ffffffc3 x12: ffff0000ebd62020
x11: ff00800008e7f040 x10: 0000000000000000 x9 : ffff800008e7f040
x8 : ffff0000d5f53800 x7 : ffff0000ebd62000 x6 : ffff0000ebd62020
x5 : ffff800021657060 x4 : ffff0000d52d9428 x3 : ffff800008e7d044
x2 : 0000000000000028 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 ext4_xattr_block_set+0x20bc/0x28b4 fs/ext4/xattr.c:1865
 ext4_xattr_move_to_block fs/ext4/xattr.c:2613 [inline]
 ext4_xattr_make_inode_space fs/ext4/xattr.c:2688 [inline]
 ext4_expand_extra_isize_ea+0xea4/0x1818 fs/ext4/xattr.c:2776
 __ext4_expand_extra_isize+0x2a0/0x364 fs/ext4/inode.c:6003
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6046 [inline]
 __ext4_mark_inode_dirty+0x3d4/0x7b4 fs/ext4/inode.c:6124
 ext4_evict_inode+0xb50/0x1264 fs/ext4/inode.c:281
 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: 4232
hardirqs last  enabled at (4231): [<ffff800008a9c328>] lookup_bh_lru fs/buffer.c:1291 [inline]
hardirqs last  enabled at (4231): [<ffff800008a9c328>] __find_get_block+0x1c4/0xde4 fs/buffer.c:1303
hardirqs last disabled at (4232): [<ffff800011b8b0d4>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (1342): [<ffff800008031254>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1340): [<ffff800008031220>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
EA inode 11 i_nlink=2
WARNING: CPU: 0 PID: 4519 at fs/ext4/xattr.c:1006 ext4_xattr_inode_update_ref+0x454/0x498 fs/ext4/xattr.c:1004
Modules linked in:
CPU: 0 PID: 4519 Comm: syz.0.17 Tainted: G        W          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 : ffff800021656ea0
x29: ffff800021656f50 x28: 0000000000000000 x27: 1fffe0001e311317
x26: ffff0000f1889700 x25: dfff800000000000 x24: ffff800021656ec0
x23: ffff7000042cadd8 x22: ffff800017d5e000 x21: 0000000000000002
x20: 0000000000000001 x19: ffff0000f18896c0 x18: 1fffe00033e7277e
x17: 0000000000000000 x16: ffff800011b8ee98 x15: 0000000000000000
x14: 0000000000000001 x13: 1fffe00033e727a3 x12: 0000000000000000
x11: ff00800008195f70 x10: 0000000000000000 x9 : c654642aee6e2800
x8 : c654642aee6e2800 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800021656938 x4 : ffff800015464e60 x3 : ffff800008540378
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000000
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_set_entry+0x934/0x15f4 fs/ext4/xattr.c:1673
 ext4_xattr_ibody_set+0x208/0x604 fs/ext4/xattr.c:2217
 ext4_xattr_move_to_block fs/ext4/xattr.c:2620 [inline]
 ext4_xattr_make_inode_space fs/ext4/xattr.c:2688 [inline]
 ext4_expand_extra_isize_ea+0xeec/0x1818 fs/ext4/xattr.c:2776
 __ext4_expand_extra_isize+0x2a0/0x364 fs/ext4/inode.c:6003
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6046 [inline]
 __ext4_mark_inode_dirty+0x3d4/0x7b4 fs/ext4/inode.c:6124
 ext4_evict_inode+0xb50/0x1264 fs/ext4/inode.c:281
 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: 4518
hardirqs last  enabled at (4517): [<ffff80000831357c>] __up_console_sem+0xb4/0xfc kernel/printk/printk.c:261
hardirqs last disabled at (4518): [<ffff800011b8b0d4>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (4400): [<ffff8000081ae3b4>] softirq_handle_end kernel/softirq.c:439 [inline]
softirqs last  enabled at (4400): [<ffff8000081ae3b4>] handle_softirqs+0xb1c/0xc90 kernel/softirq.c:624
softirqs last disabled at (4235): [<ffff800008020e6c>] __do_softirq+0x14/0x20 kernel/softirq.c:630
---[ end trace 0000000000000000 ]---
EXT4-fs (loop0): 1 orphan inode deleted
EXT4-fs (loop0): mounted filesystem without journal. Quota mode: writeback.

Crashes (74):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/07/08 17:12 linux-6.1.y 090666d3cc90 88a4b44c .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2025/12/27 09:16 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2025/09/18 02:55 linux-6.1.y 3db754f56897 e2beed91 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2026/07/08 17:07 linux-6.1.y 090666d3cc90 88a4b44c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2026/02/17 22:47 linux-6.1.y 8ce36b2849ef 06ec4f7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/12/28 14:50 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/12/25 03:25 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/12/06 18:44 linux-6.1.y f6e38ae624cf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/10/26 20:01 linux-6.1.y 8e6e2188d949 c0460fcd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/10/17 19:28 linux-6.1.y c2fda4b3f577 7adf5298 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/10/09 19:00 linux-6.1.y 882efbdd9d34 7e2882b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/10/09 18:58 linux-6.1.y 882efbdd9d34 7e2882b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/10/06 10:26 linux-6.1.y 882efbdd9d34 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/10/06 10:26 linux-6.1.y 882efbdd9d34 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/10/06 10:12 linux-6.1.y 882efbdd9d34 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/10/03 21:28 linux-6.1.y 882efbdd9d34 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/10/03 21:28 linux-6.1.y 882efbdd9d34 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/10/03 10:37 linux-6.1.y 882efbdd9d34 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/10/03 10:36 linux-6.1.y 882efbdd9d34 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/10/03 10:24 linux-6.1.y 882efbdd9d34 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/10/02 09:15 linux-6.1.y 7b34dc04e4ff 267f56c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/10/02 09:15 linux-6.1.y 7b34dc04e4ff 267f56c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/10/01 09:30 linux-6.1.y 7b34dc04e4ff 65a0eece .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/10/01 09:30 linux-6.1.y 7b34dc04e4ff 65a0eece .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/09/23 08:52 linux-6.1.y 363a599da6d9 0ac7291c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/09/23 08:52 linux-6.1.y 363a599da6d9 0ac7291c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/09/20 09:24 linux-6.1.y 363a599da6d9 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/09/20 09:22 linux-6.1.y 363a599da6d9 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/09/20 06:46 linux-6.1.y 363a599da6d9 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/09/20 06:46 linux-6.1.y 363a599da6d9 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/09/19 00:01 linux-6.1.y 3db754f56897 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/09/19 00:01 linux-6.1.y 3db754f56897 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/09/18 06:55 linux-6.1.y 3db754f56897 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2025/09/18 06:55 linux-6.1.y 3db754f56897 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ext4_xattr_block_set
2026/07/08 14:54 linux-6.1.y 090666d3cc90 88a4b44c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2026/01/24 16:45 linux-6.1.y cd9b81672742 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2025/12/28 14:50 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2025/12/27 09:04 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2025/12/19 09:13 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2025/10/09 16:06 linux-6.1.y 882efbdd9d34 7e2882b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2025/10/09 16:04 linux-6.1.y 882efbdd9d34 7e2882b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2025/10/09 16:02 linux-6.1.y 882efbdd9d34 7e2882b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2025/10/09 16:01 linux-6.1.y 882efbdd9d34 7e2882b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2025/10/06 08:11 linux-6.1.y 882efbdd9d34 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2025/10/06 08:11 linux-6.1.y 882efbdd9d34 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2025/09/24 22:54 linux-6.1.y 363a599da6d9 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2025/09/24 22:54 linux-6.1.y 363a599da6d9 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2025/09/20 05:53 linux-6.1.y 363a599da6d9 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2025/09/20 05:53 linux-6.1.y 363a599da6d9 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2025/09/20 04:49 linux-6.1.y 363a599da6d9 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2025/09/20 04:49 linux-6.1.y 363a599da6d9 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2025/09/19 00:03 linux-6.1.y 3db754f56897 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2025/09/19 00:02 linux-6.1.y 3db754f56897 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2025/09/18 02:51 linux-6.1.y 3db754f56897 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
2025/09/18 02:39 linux-6.1.y 3db754f56897 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ext4_xattr_block_set
* Struck through repros no longer work on HEAD.