UDF-fs: Scanning with blocksize 512 failed UDF-fs: warning (device loop0): udf_load_vrs: No VRS found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop0): udf_load_vrs: No VRS found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) ================================================================== BUG: KASAN: use-after-free in udf_write_aext+0x62d/0x7e0 fs/udf/inode.c:2090 Write of size 4 at addr ffff888029f77ff0 by task syz-executor398/5060 CPU: 0 PID: 5060 Comm: syz-executor398 Not tainted 6.2.0-rc1-syzkaller-00084-gc8451c141e07 #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_write_aext+0x62d/0x7e0 fs/udf/inode.c:2090 udf_add_entry+0x1712/0x3300 fs/udf/namei.c:482 udf_mkdir+0x13c/0x980 fs/udf/namei.c:681 vfs_mkdir+0x3b3/0x590 fs/namei.c:4036 do_mkdirat+0x25b/0x530 fs/namei.c:4061 __do_sys_mkdirat fs/namei.c:4076 [inline] __se_sys_mkdirat fs/namei.c:4074 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4074 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 RIP: 0033:0x7ffa1c1efae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd8a408de8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ffa1c1efae9 RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000004 RBP: 00007ffa1c1af0f0 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000189e R11: 0000000000000246 R12: 00007ffa1c1af180 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 The buggy address belongs to the physical page: page:ffffea0000a7ddc0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x29f77 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 ffffea0000a7ddc8 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 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4435, tgid 4435 (udevd), ts 27767344460, free_ts 32345340369 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 kmalloc_trace+0x26/0x60 mm/slab_common.c:1062 kmalloc include/linux/slab.h:580 [inline] kzalloc include/linux/slab.h:720 [inline] uevent_show+0x163/0x310 drivers/base/core.c:2488 dev_attr_show+0x50/0xc0 drivers/base/core.c:2196 sysfs_kf_seq_show+0x324/0x4a0 fs/sysfs/file.c:59 seq_read_iter+0x43a/0xd30 fs/seq_file.c:230 call_read_iter include/linux/fs.h:2180 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x7ac/0xbf0 fs/read_write.c:470 ksys_read+0x177/0x2a0 fs/read_write.c:613 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 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 vm_area_dup+0x23/0x1b0 kernel/fork.c:466 __split_vma+0xcc/0x530 mm/mmap.c:2207 do_mas_align_munmap+0x876/0x14e0 mm/mmap.c:2358 do_mas_munmap+0x245/0x2b0 mm/mmap.c:2498 mmap_region+0x7b0/0x1e20 mm/mmap.c:2546 do_mmap+0x8d9/0xf30 mm/mmap.c:1411 vm_mmap_pgoff+0x19e/0x2b0 mm/util.c:520 ksys_mmap_pgoff+0x48c/0x6d0 mm/mmap.c:1457 Memory state around the buggy address: ffff888029f77e80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888029f77f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888029f77f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888029f78000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888029f78080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================