EXT4-fs (loop5): Ignoring removed orlov option
EXT4-fs (loop5): mounted filesystem without journal. Opts: block_validity,bsddf,nombcache,inode_readahead_blks=0x0000000000000000,debug_want_extra_isize=0x0000000000000080,orlov,nogrpid,noauto_da_alloc,grpjquota=,,errors=continue
EXT4-fs error (device loop5): xattr_find_entry:297: inode #12: comm syz.5.293: corrupted xattr entries
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BUG: KASAN: use-after-free in xattr_find_entry fs/ext4/xattr.c:294 [inline]
BUG: KASAN: use-after-free in ext4_xattr_ibody_get+0x62e/0x690 fs/ext4/xattr.c:601
Read of size 4 at addr ffff88810effa004 by task syz.5.293/1560

CPU: 0 PID: 1560 Comm: syz.5.293 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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
 xattr_find_entry fs/ext4/xattr.c:294 [inline]
 ext4_xattr_ibody_get+0x62e/0x690 fs/ext4/xattr.c:601
 ext4_xattr_get+0x116/0x820 fs/ext4/xattr.c:655
 ext4_get_acl+0x6c/0x660 fs/ext4/acl.c:162
 get_acl+0x15f/0x270 fs/posix_acl.c:141
 posix_acl_chmod+0xe4/0x240 fs/posix_acl.c:565
 ext4_setattr+0x9fa/0x1760 fs/ext4/inode.c:5722
 notify_change+0xab3/0xe40 fs/attr.c:410
 chmod_common+0x1e1/0x390 fs/open.c:584
 do_fchmodat+0xd4/0x1a0 fs/open.c:622
 __do_sys_fchmodat fs/open.c:635 [inline]
 __se_sys_fchmodat fs/open.c:632 [inline]
 __x64_sys_fchmodat+0x7b/0x90 fs/open.c:632
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f1843935629
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:00007f1842390028 EFLAGS: 00000246 ORIG_RAX: 000000000000010c
RAX: ffffffffffffffda RBX: 00007f1843baefa0 RCX: 00007f1843935629
RDX: 000000000000017f RSI: 0000200000000300 RDI: ffffffffffffff9c
RBP: 00007f18439cbb39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1843baf038 R14: 00007f1843baefa0 R15: 00007ffca2b264a8

The buggy address belongs to the page:
page:ffffea00043bfe80 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10effa
flags: 0x4000000000000000()
raw: 4000000000000000 ffffea00043acf88 ffffea0004e25bc8 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 1133, ts 68039306405, free_ts 68047105491
 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:5370
 __vmalloc_area_node mm/vmalloc.c:-1 [inline]
 __vmalloc_node_range+0x353/0x790 mm/vmalloc.c:2629
 __vmalloc_node mm/vmalloc.c:2689 [inline]
 vzalloc+0x78/0x90 mm/vmalloc.c:2742
 hid_open_report+0x224/0xe50 drivers/hid/hid-core.c:1241
 hid_parse include/linux/hid.h:1049 [inline]
 hid_generic_probe+0x3e/0x90 drivers/hid/hid-generic.c:63
 hid_device_probe+0x287/0x380 drivers/hid/hid-core.c:2317
 really_probe+0x386/0xa90 drivers/base/dd.c:558
 driver_probe_device+0xe7/0x190 drivers/base/dd.c:752
 __device_attach_driver+0x282/0x3f0 drivers/base/dd.c:863
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:433
 __device_attach+0x2a8/0x410 drivers/base/dd.c:932
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:981
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:493
 device_add+0x8db/0xc10 drivers/base/core.c:3273
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 free_pcp_prepare mm/page_alloc.c:1421 [inline]
 free_unref_page_prepare+0x2b7/0x2d0 mm/page_alloc.c:3336
 free_unref_page mm/page_alloc.c:3391 [inline]
 free_the_page mm/page_alloc.c:5429 [inline]
 __free_pages+0x146/0x3b0 mm/page_alloc.c:5440
 __vunmap+0x86d/0x9f0 mm/vmalloc.c:2307
 __vfree mm/vmalloc.c:2356 [inline]
 vfree+0x61/0x90 mm/vmalloc.c:2387
 hid_open_report+0x9de/0xe50 drivers/hid/hid-core.c:1294
 hid_parse include/linux/hid.h:1049 [inline]
 hid_generic_probe+0x3e/0x90 drivers/hid/hid-generic.c:63
 hid_device_probe+0x287/0x380 drivers/hid/hid-core.c:2317
 really_probe+0x386/0xa90 drivers/base/dd.c:558
 driver_probe_device+0xe7/0x190 drivers/base/dd.c:752
 __device_attach_driver+0x282/0x3f0 drivers/base/dd.c:863
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:433
 __device_attach+0x2a8/0x410 drivers/base/dd.c:932
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:981
 bus_probe_device+0xc0/0x1e0 drivers/base/bus.c:493
 device_add+0x8db/0xc10 drivers/base/core.c:3273
 hid_add_device+0x356/0x4b0 drivers/hid/hid-core.c:2469

Memory state around the buggy address:
 ffff88810eff9f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88810eff9f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88810effa000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff88810effa080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88810effa100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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