REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop0): checking transaction log (loop0) REISERFS (device loop0): Using r5 hash to sort names ================================================================== BUG: KASAN: use-after-free in bin_search_in_dir_item fs/reiserfs/namei.c:40 [inline] BUG: KASAN: use-after-free in search_by_entry_key+0x45c/0xe88 fs/reiserfs/namei.c:165 Read of size 4 at addr ffff0000e2b37004 by task syz-executor513/5925 CPU: 1 PID: 5925 Comm: syz-executor513 Not tainted 6.3.0-rc7-syzkaller-g14f8db1c0f9a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:319 [inline] print_report+0x174/0x514 mm/kasan/report.c:430 kasan_report+0xd4/0x130 mm/kasan/report.c:536 __asan_report_load_n_noabort+0x1c/0x28 mm/kasan/report_generic.c:391 bin_search_in_dir_item fs/reiserfs/namei.c:40 [inline] search_by_entry_key+0x45c/0xe88 fs/reiserfs/namei.c:165 reiserfs_find_entry+0xd20/0x149c fs/reiserfs/namei.c:322 reiserfs_lookup+0x184/0x3c4 fs/reiserfs/namei.c:368 __lookup_slow+0x250/0x374 fs/namei.c:1686 lookup_one_len+0x178/0x28c fs/namei.c:2712 reiserfs_lookup_privroot+0x8c/0x204 fs/reiserfs/xattr.c:973 reiserfs_fill_super+0x15b4/0x2028 fs/reiserfs/super.c:2192 mount_bdev+0x26c/0x368 fs/super.c:1380 get_super_block+0x44/0x58 fs/reiserfs/super.c:2601 legacy_get_tree+0xd4/0x16c fs/fs_context.c:610 vfs_get_tree+0x90/0x274 fs/super.c:1510 do_new_mount+0x25c/0x8c8 fs/namespace.c:3042 path_mount+0x590/0xe04 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount fs/namespace.c:3571 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3571 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 The buggy address belongs to the physical page: page:000000009a787874 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x122b37 flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000000000 fffffc00038ace08 ffff0001b428eca0 0000000000000000 raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000e2b36f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000e2b36f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000e2b37000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff0000e2b37080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff0000e2b37100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================