==================================================================
BUG: KASAN: use-after-free in selinux_inode security/selinux/include/objsec.h:164 [inline]
BUG: KASAN: use-after-free in __inode_security_revalidate security/selinux/hooks.c:270 [inline]
BUG: KASAN: use-after-free in inode_security_rcu security/selinux/hooks.c:298 [inline]
BUG: KASAN: use-after-free in selinux_inode_follow_link+0x134/0x370 security/selinux/hooks.c:3162
Read of size 8 at addr ffff888131d61f28 by task syz.1.3461/10735

CPU: 0 PID: 10735 Comm: syz.1.3461 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:427 [inline]
 kasan_report+0x10f/0x150 mm/kasan/report.c:444
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309
 selinux_inode security/selinux/include/objsec.h:164 [inline]
 __inode_security_revalidate security/selinux/hooks.c:270 [inline]
 inode_security_rcu security/selinux/hooks.c:298 [inline]
 selinux_inode_follow_link+0x134/0x370 security/selinux/hooks.c:3162
 security_inode_follow_link+0xb4/0x110 security/security.c:1323
 pick_link+0x544/0xe00 fs/namei.c:1768
 step_into+0xac8/0xce0 fs/namei.c:1840
 walk_component+0x263/0x460 fs/namei.c:1990
 link_path_walk+0x688/0xde0 fs/namei.c:-1
 path_parentat fs/namei.c:2510 [inline]
 __filename_parentat+0x254/0x690 fs/namei.c:2534
 filename_parentat fs/namei.c:2552 [inline]
 do_unlinkat+0xeb/0x6c0 fs/namei.c:4327
 __do_sys_unlinkat fs/namei.c:4399 [inline]
 __se_sys_unlinkat fs/namei.c:4392 [inline]
 __x64_sys_unlinkat+0xd8/0xf0 fs/namei.c:4392
 x64_sys_call+0x4c0/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:264
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fc8bf25ee59
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:00007fc8bf0a0028 EFLAGS: 00000246 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 00007fc8bf4d8090 RCX: 00007fc8bf25ee59
RDX: 0000000000000000 RSI: 00002000000001c0 RDI: 0000000000000004
RBP: 00007fc8bf2f4e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc8bf4d8128 R14: 00007fc8bf4d8090 R15: 00007ffc75f2d6c8
 </TASK>

Allocated by task 10729:
 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:433 [inline]
 __kasan_slab_alloc+0xb7/0xe0 mm/kasan/common.c:466
 kasan_slab_alloc include/linux/kasan.h:217 [inline]
 slab_post_alloc_hook+0x4f/0x2b0 mm/slab.h:550
 slab_alloc_node mm/slub.c:3245 [inline]
 slab_alloc mm/slub.c:3255 [inline]
 kmem_cache_alloc+0xf7/0x260 mm/slub.c:3260
 alloc_inode fs/inode.c:266 [inline]
 new_inode_pseudo+0x7a/0x210 fs/inode.c:1011
 new_inode+0x28/0x1e0 fs/inode.c:1040
 bpf_get_inode kernel/bpf/inode.c:116 [inline]
 bpf_symlink+0x65/0x270 kernel/bpf/inode.c:394
 vfs_symlink+0x29e/0x470 fs/namei.c:4437
 do_symlinkat+0x24a/0x5d0 fs/namei.c:4466
 __do_sys_symlinkat fs/namei.c:4483 [inline]
 __se_sys_symlinkat fs/namei.c:4480 [inline]
 __x64_sys_symlinkat+0x99/0xb0 fs/namei.c:4480
 x64_sys_call+0x74b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:267
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

Freed by task 10729:
 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:365
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373
 kasan_slab_free include/linux/kasan.h:193 [inline]
 slab_free_hook mm/slub.c:1728 [inline]
 slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1754
 slab_free mm/slub.c:3526 [inline]
 kmem_cache_free+0x100/0x320 mm/slub.c:3544
 free_inode_nonrcu+0x1c/0x20 fs/inode.c:245
 bpf_destroy_inode+0x14a/0x170 kernel/bpf/inode.c:621
 destroy_inode fs/inode.c:314 [inline]
 evict+0x790/0x8b0 fs/inode.c:665
 iput_final fs/inode.c:1779 [inline]
 iput+0x651/0x7e0 fs/inode.c:1805
 do_unlinkat+0x380/0x6c0 fs/namei.c:4363
 __do_sys_unlinkat fs/namei.c:4399 [inline]
 __se_sys_unlinkat fs/namei.c:4392 [inline]
 __x64_sys_unlinkat+0xd8/0xf0 fs/namei.c:4392
 x64_sys_call+0x4c0/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:264
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

The buggy address belongs to the object at ffff888131d61ef0
 which belongs to the cache inode_cache of size 752
The buggy address is located 56 bytes inside of
 752-byte region [ffff888131d61ef0, ffff888131d621e0)
The buggy address belongs to the page:
page:ffffea0004c75800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x131d60
head:ffffea0004c75800 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 ffffea0004c75d00 0000000300000003 ffff8881001c4180
raw: 0000000000000000 0000000000120012 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Reclaimable, gfp_mask 0x1d20d0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 455, ts 29567507938, free_ts 0
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2607
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2613
 get_page_from_freelist+0x2c3a/0x2cd0 mm/page_alloc.c:4487
 __alloc_pages+0x1a2/0x460 mm/page_alloc.c:5824
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1937 [inline]
 new_slab+0xa0/0x4d0 mm/slub.c:2000
 ___slab_alloc+0x3ac/0x840 mm/slub.c:3033
 __slab_alloc+0x49/0x90 mm/slub.c:3120
 slab_alloc_node mm/slub.c:3211 [inline]
 slab_alloc mm/slub.c:3255 [inline]
 kmem_cache_alloc+0x138/0x260 mm/slub.c:3260
 alloc_inode fs/inode.c:266 [inline]
 new_inode_pseudo+0x7a/0x210 fs/inode.c:1011
 new_inode+0x28/0x1e0 fs/inode.c:1040
 simple_fill_super+0xd1/0x5c0 fs/libfs.c:630
 bpf_fill_super+0xb1/0x790 kernel/bpf/inode.c:769
 vfs_get_super fs/super.c:1172 [inline]
 get_tree_nodev+0xb3/0x160 fs/super.c:1202
 bpf_get_tree+0x1c/0x20 kernel/bpf/inode.c:785
 vfs_get_tree+0x89/0x260 fs/super.c:1530
 vfs_fsconfig_locked+0x236/0x3f0 fs/fsopen.c:238
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888131d61e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc
 ffff888131d61e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fa fb
>ffff888131d61f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff888131d61f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888131d62000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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