loop1: detected capacity change from 0 to 32768
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BUG: KASAN: slab-out-of-bounds in ciCompare fs/jfs/jfs_dtree.c:3416 [inline]
BUG: KASAN: slab-out-of-bounds in dtSearch+0x1278/0x1b18 fs/jfs/jfs_dtree.c:645
Read of size 1 at addr ffff0000f623bd14 by task syz.1.85/4760

CPU: 0 PID: 4760 Comm: syz.1.85 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026
Call trace:
 dump_backtrace+0x1c0/0x1ec 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+0xf4/0x15c 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+0xa8/0xfc mm/kasan/report.c:524
 __asan_report_load1_noabort+0x2c/0x38 mm/kasan/report_generic.c:348
 ciCompare fs/jfs/jfs_dtree.c:3416 [inline]
 dtSearch+0x1278/0x1b18 fs/jfs/jfs_dtree.c:645
 jfs_lookup+0x164/0x378 fs/jfs/namei.c:1461
 lookup_open fs/namei.c:3468 [inline]
 open_last_lookups fs/namei.c:3558 [inline]
 path_openat+0xc98/0x26bc fs/namei.c:3788
 do_filp_open+0x194/0x384 fs/namei.c:3818
 do_sys_openat2+0x134/0x3f4 fs/open.c:1320
 do_sys_open fs/open.c:1336 [inline]
 __do_sys_openat fs/open.c:1352 [inline]
 __se_sys_openat fs/open.c:1347 [inline]
 __arm64_sys_openat+0x118/0x14c fs/open.c:1347
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 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 ffff0000f623b780
 which belongs to the cache jfs_ip of size 2240
The buggy address is located 1428 bytes inside of
 2240-byte region [ffff0000f623b780, ffff0000f623c040)

The buggy address belongs to the physical page:
page:000000004fe70a5a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x136238
head:000000004fe70a5a order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff0000f2a7e101
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c4ca3800
raw: 0000000000000000 00000000800d000d 00000001ffffffff ffff0000f2a7e101
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000f623bc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000f623bc80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000f623bd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                         ^
 ffff0000f623bd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000f623be00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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