UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) UDF-fs: error (device loop0): udf_read_inode: (ino 1408) failed !bh UDF-fs: error (device loop0): udf_fill_super: Error in udf_iget, block=96, partition=0 ================================================================== BUG: KASAN: use-after-free in udf_close_lvid+0x5a7/0x920 fs/udf/super.c:2072 Write of size 1 at addr ffff888071ff4f80 by task syz-executor206/17610 CPU: 1 PID: 17610 Comm: syz-executor206 Not tainted 6.2.0-rc1-syzkaller #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+0x163/0x220 lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:306 print_report+0x107/0x220 mm/kasan/report.c:417 kasan_report+0x139/0x170 mm/kasan/report.c:517 udf_close_lvid+0x5a7/0x920 fs/udf/super.c:2072 udf_fill_super+0xe87/0x1b60 fs/udf/super.c:2309 mount_bdev+0x27a/0x370 fs/super.c:1359 legacy_get_tree+0xe4/0x170 fs/fs_context.c:610 vfs_get_tree+0x7b/0x220 fs/super.c:1489 do_new_mount+0x1df/0x930 fs/namespace.c:3145 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount+0x236/0x2d0 fs/namespace.c:3674 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f9e3ed9007a Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 a8 00 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 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:00007f9e3ed3b168 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f9e3ed3b1c0 RCX: 00007f9e3ed9007a RDX: 0000000020000000 RSI: 0000000020000700 RDI: 00007f9e3ed3b180 RBP: 000000000000000e R08: 00007f9e3ed3b1c0 R09: 00007f9e3ed3b6b8 R10: 0000000000000810 R11: 0000000000000286 R12: 00007f9e3ed3b180 R13: 0000000020000350 R14: 0000000000000003 R15: 0000000000000004 Allocated by task 4391: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x65/0x70 mm/kasan/common.c:325 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+0x9c/0x430 fs/namei.c:139 do_sys_openat2+0xb5/0x420 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+0x209/0x250 fs/open.c:1337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 4391: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x70 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+0x94/0x1d0 mm/slub.c:3809 do_sys_openat2+0x322/0x420 fs/open.c:1319 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+0x209/0x250 fs/open.c:1337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888071ff4400 which belongs to the cache names_cache of size 4096 The buggy address is located 2944 bytes inside of 4096-byte region [ffff888071ff4400, ffff888071ff5400) The buggy address belongs to the physical page: page:ffffea0001c7fc00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x71ff0 head:ffffea0001c7fc00 order:3 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff8880105e7780 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000070007 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5702, tgid 5702 (udevd), ts 122965971216, free_ts 122958302737 prep_new_page mm/page_alloc.c:2531 [inline] get_page_from_freelist+0x72b/0x7a0 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+0x7f4/0xeb0 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] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x268/0x350 mm/slub.c:3476 getname_flags+0x9c/0x430 fs/namei.c:139 do_sys_openat2+0xb5/0x420 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+0x209/0x250 fs/open.c:1337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd 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+0x116/0x180 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+0x9c/0x430 fs/namei.c:139 user_path_at_empty+0x1e/0x150 fs/namei.c:2875 do_readlinkat+0x10b/0x320 fs/stat.c:471 __do_sys_readlink fs/stat.c:504 [inline] __se_sys_readlink fs/stat.c:501 [inline] __x64_sys_readlink+0x76/0x80 fs/stat.c:501 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff888071ff4e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888071ff4f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888071ff4f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888071ff5000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888071ff5080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================