loop0: detected capacity change from 0 to 2048 UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) ================================================================== BUG: KASAN: slab-out-of-bounds in udf_write_aext+0x4c0/0x668 fs/udf/inode.c:2100 Write of size 4 at addr ffff0000c2aef3f0 by task syz-executor191/4052 CPU: 0 PID: 4052 Comm: syz-executor191 Not tainted 5.15.103-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x174/0x1e4 mm/kasan/report.c:451 __asan_report_store_n_noabort+0x40/0x4c mm/kasan/report_generic.c:325 udf_write_aext+0x4c0/0x668 fs/udf/inode.c:2100 udf_add_entry+0x11e0/0x28b0 fs/udf/namei.c:482 udf_mkdir+0x158/0x7e0 fs/udf/namei.c:681 vfs_mkdir+0x350/0x514 fs/namei.c:3994 do_mkdirat+0x20c/0x610 fs/namei.c:4019 __do_sys_mkdirat fs/namei.c:4034 [inline] __se_sys_mkdirat fs/namei.c:4032 [inline] __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4032 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Allocated by task 4052: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc+0xbc/0xfc mm/kasan/common.c:513 __kasan_kmalloc+0x10/0x1c mm/kasan/common.c:522 kasan_kmalloc include/linux/kasan.h:264 [inline] kmem_cache_alloc_trace+0x248/0x3b4 mm/slub.c:3247 kmalloc include/linux/slab.h:591 [inline] kmalloc_array include/linux/slab.h:630 [inline] kcalloc include/linux/slab.h:660 [inline] udf_process_sequence+0x170/0x3ed4 fs/udf/super.c:1691 udf_load_sequence fs/udf/super.c:1815 [inline] udf_check_anchor_block+0x310/0x5f8 fs/udf/super.c:1855 udf_scan_anchors+0x134/0x594 fs/udf/super.c:1888 udf_find_anchor fs/udf/super.c:1945 [inline] udf_load_vrs+0x1b4/0xab8 fs/udf/super.c:2010 udf_fill_super+0x768/0x1a7c fs/udf/super.c:2188 mount_bdev+0x26c/0x368 fs/super.c:1369 udf_mount+0x44/0x58 fs/udf/super.c:122 legacy_get_tree+0xd4/0x16c fs/fs_context.c:610 vfs_get_tree+0x90/0x274 fs/super.c:1499 do_new_mount+0x25c/0x8c8 fs/namespace.c:2994 path_mount+0x590/0x104c fs/namespace.c:3324 do_mount fs/namespace.c:3337 [inline] __do_sys_mount fs/namespace.c:3545 [inline] __se_sys_mount fs/namespace.c:3522 [inline] __arm64_sys_mount+0x510/0x5e0 fs/namespace.c:3522 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Freed by task 4052: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x84 mm/kasan/common.c:46 kasan_set_free_info+0x28/0x4c mm/kasan/generic.c:360 ____kasan_slab_free+0x118/0x164 mm/kasan/common.c:366 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1705 [inline] slab_free_freelist_hook+0x128/0x1ec mm/slub.c:1731 slab_free mm/slub.c:3499 [inline] kfree+0x1b0/0x480 mm/slub.c:4559 udf_process_sequence+0xd20/0x3ed4 fs/udf/super.c:1783 udf_load_sequence fs/udf/super.c:1815 [inline] udf_check_anchor_block+0x310/0x5f8 fs/udf/super.c:1855 udf_scan_anchors+0x134/0x594 fs/udf/super.c:1888 udf_find_anchor fs/udf/super.c:1945 [inline] udf_load_vrs+0x1b4/0xab8 fs/udf/super.c:2010 udf_fill_super+0x768/0x1a7c fs/udf/super.c:2188 mount_bdev+0x26c/0x368 fs/super.c:1369 udf_mount+0x44/0x58 fs/udf/super.c:122 legacy_get_tree+0xd4/0x16c fs/fs_context.c:610 vfs_get_tree+0x90/0x274 fs/super.c:1499 do_new_mount+0x25c/0x8c8 fs/namespace.c:2994 path_mount+0x590/0x104c fs/namespace.c:3324 do_mount fs/namespace.c:3337 [inline] __do_sys_mount fs/namespace.c:3545 [inline] __se_sys_mount fs/namespace.c:3522 [inline] __arm64_sys_mount+0x510/0x5e0 fs/namespace.c:3522 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 The buggy address belongs to the object at ffff0000c2aef000 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 496 bytes to the right of 512-byte region [ffff0000c2aef000, ffff0000c2aef200) The buggy address belongs to the page: page:00000000c870da77 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102aec head:00000000c870da77 order:2 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 dead000000000100 dead000000000122 ffff0000c0002600 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000c2aef280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000c2aef300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff0000c2aef380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000c2aef400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000c2aef480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================