================================================================== BUG: KASAN: use-after-free in udf_close_lvid+0x67b/0x970 fs/udf/super.c:2072 Write of size 1 at addr ffff888035c7ab88 by task syz-executor.3/5101 CPU: 0 PID: 5101 Comm: syz-executor.3 Not tainted 6.1.0-syzkaller-13822-g6feb57c2fd7c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:306 print_report+0x107/0x1f0 mm/kasan/report.c:417 kasan_report+0xcd/0x100 mm/kasan/report.c:517 udf_close_lvid+0x67b/0x970 fs/udf/super.c:2072 udf_put_super+0xc9/0x160 fs/udf/super.c:2359 generic_shutdown_super+0x130/0x310 fs/super.c:492 kill_block_super+0x79/0xd0 fs/super.c:1386 deactivate_locked_super+0xa7/0xf0 fs/super.c:332 cleanup_mnt+0x494/0x520 fs/namespace.c:1291 task_work_run+0x243/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x124/0x150 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:296 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f709248d547 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffcd5ce568 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f709248d547 RDX: 00007fffcd5ce63b RSI: 000000000000000a RDI: 00007fffcd5ce630 RBP: 00007fffcd5ce630 R08: 00000000ffffffff R09: 00007fffcd5ce400 R10: 00005555561c78b3 R11: 0000000000000246 R12: 00007f70924e6b24 R13: 00007fffcd5cf6f0 R14: 00005555561c7810 R15: 00007fffcd5cf730 Allocated by task 5335: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x3d/0x60 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:380 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:968 [inline] __kmalloc+0xaf/0x190 mm/slab_common.c:981 kmalloc include/linux/slab.h:584 [inline] tomoyo_realpath_from_path+0xcd/0x5f0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x22e/0x670 security/tomoyo/file.c:822 security_inode_getattr+0xc0/0x140 security/security.c:1375 vfs_getattr fs/stat.c:161 [inline] vfs_statx+0x188/0x4a0 fs/stat.c:236 vfs_fstatat fs/stat.c:270 [inline] __do_sys_newfstatat fs/stat.c:440 [inline] __se_sys_newfstatat+0xed/0x7d0 fs/stat.c:434 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 5335: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x3d/0x60 mm/kasan/common.c:52 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:518 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0x71/0x110 mm/slub.c:3800 tomoyo_realpath_from_path+0x5b9/0x5f0 security/tomoyo/realpath.c:286 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x22e/0x670 security/tomoyo/file.c:822 security_inode_getattr+0xc0/0x140 security/security.c:1375 vfs_getattr fs/stat.c:161 [inline] vfs_statx+0x188/0x4a0 fs/stat.c:236 vfs_fstatat fs/stat.c:270 [inline] __do_sys_newfstatat fs/stat.c:440 [inline] __se_sys_newfstatat+0xed/0x7d0 fs/stat.c:434 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888035c7a000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 2952 bytes inside of 4096-byte region [ffff888035c7a000, ffff888035c7b000) The buggy address belongs to the physical page: page:ffffea0000d71e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x35c78 head:ffffea0000d71e00 order:3 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888012842140 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5335, tgid 5335 (udevd), ts 745987700139, free_ts 739325224565 prep_new_page mm/page_alloc.c:2531 [inline] get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4283 __alloc_pages+0x259/0x560 mm/page_alloc.c:5549 alloc_slab_page+0xbd/0x190 mm/slub.c:1851 allocate_slab+0x5e/0x3c0 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0x782/0xe20 mm/slub.c:3193 __slab_alloc mm/slub.c:3292 [inline] __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x25b/0x340 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc+0x9e/0x190 mm/slab_common.c:981 kmalloc include/linux/slab.h:584 [inline] tomoyo_realpath_from_path+0xcd/0x5f0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x1f3/0x480 security/tomoyo/file.c:771 security_file_open+0x50/0x560 security/security.c:1718 do_dentry_open+0x306/0x11b0 fs/open.c:869 do_open fs/namei.c:3557 [inline] path_openat+0x25ba/0x2dd0 fs/namei.c:3714 do_filp_open+0x264/0x4f0 fs/namei.c:3741 do_sys_openat2+0x124/0x4e0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1446 [inline] free_pcp_prepare+0x751/0x780 mm/page_alloc.c:1496 free_unref_page_prepare mm/page_alloc.c:3369 [inline] free_unref_page+0x19/0x4c0 mm/page_alloc.c:3464 discard_slab mm/slub.c:2098 [inline] __unfreeze_partials+0x1a5/0x1e0 mm/slub.c:2637 put_cpu_partial+0x106/0x170 mm/slub.c:2713 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:761 [inline] slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x1b3/0x350 mm/slub.c:3476 getname_flags+0xb8/0x4e0 fs/namei.c:139 do_sys_openat2+0xba/0x4e0 fs/open.c:1304 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff888035c7aa80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888035c7ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888035c7ab80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888035c7ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888035c7ac80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb 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