================================================================== BUG: KASAN: slab-out-of-bounds in ciCompare fs/jfs/jfs_dtree.c:3696 [inline] BUG: KASAN: slab-out-of-bounds in dtSearch+0x12c0/0x1f34 fs/jfs/jfs_dtree.c:644 Read of size 1 at addr ffff0000e601bd14 by task syz.4.7/4121 CPU: 1 PID: 4121 Comm: syz.4.7 Not tainted 5.15.167-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 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_load1_noabort+0x44/0x50 mm/kasan/report_generic.c:306 ciCompare fs/jfs/jfs_dtree.c:3696 [inline] dtSearch+0x12c0/0x1f34 fs/jfs/jfs_dtree.c:644 jfs_lookup+0x164/0x39c fs/jfs/namei.c:1459 lookup_open fs/namei.c:3440 [inline] open_last_lookups fs/namei.c:3532 [inline] path_openat+0xd9c/0x26cc fs/namei.c:3739 do_filp_open+0x1a8/0x3b4 fs/namei.c:3769 do_sys_openat2+0x128/0x3e0 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_openat fs/open.c:1285 [inline] __se_sys_openat fs/open.c:1280 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1280 __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:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Allocated by task 0: (stack is not available) The buggy address belongs to the object at ffff0000e601b780 which belongs to the cache jfs_ip of size 2240 The buggy address is located 1428 bytes inside of 2240-byte region [ffff0000e601b780, ffff0000e601c040) The buggy address belongs to the page: page:00000000b737437a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x126018 head:00000000b737437a order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff0000ccc92601 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c685dc80 raw: 0000000000000000 00000000800d000d 00000001ffffffff ffff0000ccc92601 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000e601bc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000e601bc80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff0000e601bd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000e601bd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000e601be00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================