==================================================================
BUG: KASAN: slab-out-of-bounds in dtCompare fs/jfs/jfs_dtree.c:3333 [inline]
BUG: KASAN: slab-out-of-bounds in dtSearch+0x12e4/0x1b28 fs/jfs/jfs_dtree.c:650
Read of size 1 at addr ffff0000f56d3e18 by task syz.0.523/7066

CPU: 0 PID: 7066 Comm: syz.0.523 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 print_address_description+0x88/0x218 mm/kasan/report.c:316
 print_report+0x50/0x68 mm/kasan/report.c:420
 kasan_report+0xa8/0x100 mm/kasan/report.c:524
 __asan_report_load1_noabort+0x2c/0x38 mm/kasan/report_generic.c:348
 dtCompare fs/jfs/jfs_dtree.c:3333 [inline]
 dtSearch+0x12e4/0x1b28 fs/jfs/jfs_dtree.c:650
 jfs_lookup+0x13c/0x32c fs/jfs/namei.c:1459
 lookup_open fs/namei.c:3468 [inline]
 open_last_lookups fs/namei.c:3558 [inline]
 path_openat+0xfa4/0x2680 fs/namei.c:3788
 do_filp_open+0x174/0x344 fs/namei.c:3818
 do_sys_openat2+0x128/0x3d8 fs/open.c:1318
 do_sys_open fs/open.c:1334 [inline]
 __do_sys_openat fs/open.c:1350 [inline]
 __se_sys_openat fs/open.c:1345 [inline]
 __arm64_sys_openat+0x120/0x154 fs/open.c:1345
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

The buggy address belongs to the object at ffff0000f56d3780
 which belongs to the cache jfs_ip of size 2240
The buggy address is located 1688 bytes inside of
 2240-byte region [ffff0000f56d3780, ffff0000f56d4040)

The buggy address belongs to the physical page:
page:000000005e820a36 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1356d0
head:000000005e820a36 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff0000f3407501
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c4b51200
raw: 0000000000000000 00000000800d000d 00000001ffffffff ffff0000f3407501
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000f56d3d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000f56d3d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000f56d3e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                            ^
 ffff0000f56d3e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000f56d3f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
MetaData crosses page boundary!!
lblock = 11ffff8000, size  = 2077229056
CPU: 0 PID: 7066 Comm: syz.0.523 Tainted: G    B              syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 __get_metapage+0xabc/0xfcc fs/jfs/jfs_metapage.c:596
 dtSearch+0x500/0x1b28 fs/jfs/jfs_dtree.c:624
 jfs_lookup+0x13c/0x32c fs/jfs/namei.c:1459
 lookup_open fs/namei.c:3468 [inline]
 open_last_lookups fs/namei.c:3558 [inline]
 path_openat+0xfa4/0x2680 fs/namei.c:3788
 do_filp_open+0x174/0x344 fs/namei.c:3818
 do_sys_openat2+0x128/0x3d8 fs/open.c:1318
 do_sys_open fs/open.c:1334 [inline]
 __do_sys_openat fs/open.c:1350 [inline]
 __se_sys_openat fs/open.c:1345 [inline]
 __arm64_sys_openat+0x120/0x154 fs/open.c:1345
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
bread failed!
jfs_lookup: dtSearch returned -5