================================================================== BUG: KASAN: slab-out-of-bounds in dtCompare fs/jfs/jfs_dtree.c:3345 [inline] BUG: KASAN: slab-out-of-bounds in dtSearch+0x13a8/0x1d00 fs/jfs/jfs_dtree.c:650 Read of size 1 at addr ffff0000f348adc0 by task syz.1.94/7162 CPU: 1 UID: 0 PID: 7162 Comm: syz.1.94 Not tainted 6.16.0-rc4-syzkaller-g7482bb149b9f #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:501 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 print_address_description+0xa8/0x254 mm/kasan/report.c:408 print_report+0x68/0x84 mm/kasan/report.c:521 kasan_report+0xb0/0x110 mm/kasan/report.c:634 __asan_report_load1_noabort+0x20/0x2c mm/kasan/report_generic.c:378 dtCompare fs/jfs/jfs_dtree.c:3345 [inline] dtSearch+0x13a8/0x1d00 fs/jfs/jfs_dtree.c:650 jfs_lookup+0x13c/0x32c fs/jfs/namei.c:1461 lookup_one_qstr_excl_raw+0x10c/0x25c fs/namei.c:1689 lookup_one_qstr_excl fs/namei.c:1711 [inline] filename_create+0x1cc/0x3b4 fs/namei.c:4149 kern_path_create+0x48/0x6c fs/namei.c:4175 unix_bind_bsd net/unix/af_unix.c:1347 [inline] unix_bind+0x240/0xb08 net/unix/af_unix.c:1452 __sys_bind_socket net/socket.c:1810 [inline] __sys_bind+0x264/0x360 net/socket.c:1841 __do_sys_bind net/socket.c:1846 [inline] __se_sys_bind net/socket.c:1844 [inline] __arm64_sys_bind+0x7c/0x94 net/socket.c:1844 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Allocated by task 7157: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_alloc_info+0x44/0x54 mm/kasan/generic.c:562 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x70/0x88 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4148 [inline] slab_alloc_node mm/slub.c:4197 [inline] kmem_cache_alloc_lru_noprof+0x23c/0x3ec mm/slub.c:4216 jfs_alloc_inode+0x2c/0x68 fs/jfs/super.c:105 alloc_inode+0x68/0x19c fs/inode.c:346 new_inode+0x2c/0x130 fs/inode.c:1145 ialloc+0x54/0x78c fs/jfs/jfs_inode.c:48 jfs_create+0x170/0x8c4 fs/jfs/namei.c:92 lookup_open fs/namei.c:3717 [inline] open_last_lookups fs/namei.c:3816 [inline] path_openat+0x12d8/0x2c40 fs/namei.c:4052 do_filp_open+0x18c/0x36c fs/namei.c:4082 do_sys_openat2+0x11c/0x1b4 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __arm64_sys_openat+0x120/0x158 fs/open.c:1463 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 The buggy address belongs to the object at ffff0000f348a4e0 which belongs to the cache jfs_ip of size 2232 The buggy address is located 40 bytes to the right of allocated 2232-byte region [ffff0000f348a4e0, ffff0000f348ad98) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x133488 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff0000f6cbec01 flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 05ffc00000000040 ffff0000c47c8640 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800d000d 00000000f5000000 ffff0000f6cbec01 head: 05ffc00000000040 ffff0000c47c8640 dead000000000122 0000000000000000 head: 0000000000000000 00000000800d000d 00000000f5000000 ffff0000f6cbec01 head: 05ffc00000000003 fffffdffc3cd2201 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000f348ac80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000f348ad00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000f348ad80: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000f348ae00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000f348ae80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== ERROR: (device loop1): dtSearch: stack overrun! ERROR: (device loop1): remounting filesystem as read-only btstack dump: bn = 0, index = 0 bn = 0, index = 0 bn = 0, index = 0 bn = 0, index = 0 bn = 0, index = 0 bn = 0, index = 0 bn = 0, index = 0 bn = 0, index = 0 jfs_lookup: dtSearch returned -5 ERROR: (device loop1): dtSearch: stack overrun! btstack dump: bn = 0, index = 0 bn = 0, index = 0 bn = 0, index = 0 bn = 0, index = 0 bn = 0, index = 0 bn = 0, index = 0 bn = 0, index = 0 bn = 0, index = 0 jfs_lookup: dtSearch returned -5 ERROR: (device loop1): dtSearch: stack overrun! btstack dump: bn = 0, index = 0 bn = 0, index = 0 bn = 0, index = 0 bn = 0, index = 0 bn = 0, index = 0 bn = 0, index = 0 bn = 0, index = 0 bn = 0, index = 0 jfs_lookup: dtSearch returned -5