EXT4-fs (loop2): Mount option "noacl" will be removed by 3.5
Contact linux-ext4@vger.kernel.org if you think we should keep it.
EXT4-fs (loop2): Ignoring removed orlov option
EXT4-fs (loop2): mounted filesystem without journal. Opts: block_validity,bsddf,noacl,norecovery,debug_want_extra_isize=0x0000000000000080,orlov,nogrpid,noauto_da_alloc,norecovery,,errors=continue
==================================================================
BUG: KASAN: use-after-free in ext4_xattr_list_entries fs/ext4/xattr.c:670 [inline]
BUG: KASAN: use-after-free in ext4_xattr_ibody_list fs/ext4/xattr.c:740 [inline]
BUG: KASAN: use-after-free in ext4_listxattr+0x4a6/0xc50 fs/ext4/xattr.c:765
Read of size 4 at addr ffff8881112f6090 by task syz.2.17/380
CPU: 1 PID: 380 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
__dump_stack+0x21/0x24 lib/dump_stack.c:77
dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118
print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:435 [inline]
kasan_report+0xe2/0x130 mm/kasan/report.c:452
__asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308
ext4_xattr_list_entries fs/ext4/xattr.c:670 [inline]
ext4_xattr_ibody_list fs/ext4/xattr.c:740 [inline]
ext4_listxattr+0x4a6/0xc50 fs/ext4/xattr.c:765
vfs_listxattr fs/xattr.c:420 [inline]
listxattr+0x294/0x300 fs/xattr.c:715
path_listxattr+0xe1/0x1b0 fs/xattr.c:739
__do_sys_llistxattr fs/xattr.c:757 [inline]
__se_sys_llistxattr fs/xattr.c:754 [inline]
__x64_sys_llistxattr+0x7d/0x90 fs/xattr.c:754
do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f18d815fe59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd5d95b1e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000c3
RAX: ffffffffffffffda RBX: 00007f18d83d8fa0 RCX: 00007f18d815fe59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000400
RBP: 00007f18d81f5d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f18d83d8fac R14: 00007f18d83d8fa0 R15: 00007f18d83d8fa0
Allocated by task 94:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:45 [inline]
set_alloc_info mm/kasan/common.c:430 [inline]
__kasan_slab_alloc+0xbd/0xf0 mm/kasan/common.c:463
kasan_slab_alloc include/linux/kasan.h:244 [inline]
slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:580
slab_alloc_node mm/slub.c:2952 [inline]
slab_alloc mm/slub.c:2960 [inline]
kmem_cache_alloc+0x162/0x2d0 mm/slub.c:2965
kmem_cache_zalloc include/linux/slab.h:657 [inline]
__alloc_file+0x28/0x320 fs/file_table.c:101
alloc_empty_file+0x97/0x180 fs/file_table.c:151
path_openat+0xf5/0x31c0 fs/namei.c:3503
do_filp_open+0x1e2/0x410 fs/namei.c:3544
do_sys_openat2+0x19f/0x750 fs/open.c:1219
do_sys_open fs/open.c:1235 [inline]
__do_sys_openat fs/open.c:1251 [inline]
__se_sys_openat fs/open.c:1246 [inline]
__x64_sys_openat+0x136/0x160 fs/open.c:1246
do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x61/0xcb
Freed by task 12:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
____kasan_slab_free+0x125/0x160 mm/kasan/common.c:362
__kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
kasan_slab_free include/linux/kasan.h:220 [inline]
slab_free_hook mm/slub.c:1600 [inline]
slab_free_freelist_hook+0xc5/0x190 mm/slub.c:1626
slab_free mm/slub.c:3208 [inline]
kmem_cache_free+0x100/0x2d0 mm/slub.c:3224
file_free_rcu+0x93/0xa0 fs/file_table.c:50
rcu_do_batch+0x4ef/0xab0 kernel/rcu/tree.c:2494
rcu_core+0x577/0xd80 kernel/rcu/tree.c:2735
rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2748
__do_softirq+0x255/0x563 kernel/softirq.c:309
Last potentially related work creation:
kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38
__kasan_record_aux_stack+0xd2/0x100 mm/kasan/generic.c:348
kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
__call_rcu kernel/rcu/tree.c:2980 [inline]
call_rcu+0x11a/0x10b0 kernel/rcu/tree.c:3054
file_free fs/file_table.c:58 [inline]
__fput+0x5ad/0x770 fs/file_table.c:299
____fput+0x15/0x20 fs/file_table.c:314
task_work_run+0x127/0x190 kernel/task_work.c:189
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_user_mode_loop+0xcb/0xe0 kernel/entry/common.c:172
exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199
syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274
do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56
entry_SYSCALL_64_after_hwframe+0x61/0xcb
Second to last potentially related work creation:
kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38
__kasan_record_aux_stack+0xd2/0x100 mm/kasan/generic.c:348
kasan_record_aux_stack+0xe/0x10 mm/kasan/generic.c:353
task_work_add+0x27/0x1e0 kernel/task_work.c:38
fput_many+0xe7/0x1a0 fs/file_table.c:342
fput+0x1a/0x20 fs/file_table.c:358
filp_close+0x105/0x150 fs/open.c:1335
__close_fd+0x44/0x50 fs/file.c:716
__do_sys_close fs/open.c:1348 [inline]
__se_sys_close fs/open.c:1346 [inline]
__x64_sys_close+0x66/0xb0 fs/open.c:1346
do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x61/0xcb
The buggy address belongs to the object at ffff8881112f6000
which belongs to the cache filp of size 296
The buggy address is located 144 bytes inside of
296-byte region [ffff8881112f6000, ffff8881112f6128)
The buggy address belongs to the page:
page:ffffea000444bd80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1112f6
head:ffffea000444bd80 order:1 compound_mapcount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff88810018b200
raw: 0000000000000000 0000000000150015 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 105, ts 5205284405, free_ts 0
set_page_owner include/linux/page_owner.h:35 [inline]
post_alloc_hook mm/page_alloc.c:2456 [inline]
prep_new_page+0x179/0x180 mm/page_alloc.c:2462
get_page_from_freelist+0x223b/0x23d0 mm/page_alloc.c:4254
__alloc_pages_nodemask+0x290/0x620 mm/page_alloc.c:5384
alloc_slab_page mm/slub.c:-1 [inline]
allocate_slab mm/slub.c:1813 [inline]
new_slab+0x84/0x3f0 mm/slub.c:1874
new_slab_objects mm/slub.c:2632 [inline]
___slab_alloc+0x2a6/0x450 mm/slub.c:2796
__slab_alloc+0x63/0xa0 mm/slub.c:2836
slab_alloc_node mm/slub.c:2918 [inline]
slab_alloc mm/slub.c:2960 [inline]
kmem_cache_alloc+0x1ac/0x2d0 mm/slub.c:2965
kmem_cache_zalloc include/linux/slab.h:657 [inline]
__alloc_file+0x28/0x320 fs/file_table.c:101
alloc_empty_file+0x97/0x180 fs/file_table.c:151
path_openat+0xf5/0x31c0 fs/namei.c:3503
do_filp_open+0x1e2/0x410 fs/namei.c:3544
do_sys_openat2+0x19f/0x750 fs/open.c:1219
do_sys_open fs/open.c:1235 [inline]
__do_sys_openat fs/open.c:1251 [inline]
__se_sys_openat fs/open.c:1246 [inline]
__x64_sys_openat+0x136/0x160 fs/open.c:1246
do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x61/0xcb
page_owner free stack trace missing
Memory state around the buggy address:
ffff8881112f5f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff8881112f6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881112f6080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8881112f6100: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc
ffff8881112f6180: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================