ERROR: (device loop1): dbUpdatePMap: blocks are outside the map
UFO tlock:0x000000000b83bd6a
================================================================================
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:628:10
index 237 is out of range for type 'struct dtslot[128]'
CPU: 1 PID: 4446 Comm: syz.1.22 Not tainted 6.1.131-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 dump_stack+0x1c/0x58 lib/dump_stack.c:113
 ubsan_epilogue lib/ubsan.c:151 [inline]
 __ubsan_handle_out_of_bounds+0xfc/0x148 lib/ubsan.c:282
 dtSearch+0x1718/0x1f34 fs/jfs/jfs_dtree.c:628
 jfs_lookup+0x164/0x39c fs/jfs/namei.c:1459
 lookup_open fs/namei.c:3460 [inline]
 open_last_lookups fs/namei.c:3550 [inline]
 path_openat+0xd3c/0x2548 fs/namei.c:3780
 do_filp_open+0x1bc/0x3cc fs/namei.c:3810
 do_sys_openat2+0x128/0x3e0 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+0x1f0/0x240 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+0x58/0x168 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
================================================================================
ERROR: (device loop1): dtSearch: stack overrun!

btstack dump:
bn = 0, index = 0
bn = 8ed2c, index = 0
bn = 0, index = 0
bn = 8ed2c, index = 0
bn = 0, index = 0
bn = 8ed2c, index = 0
bn = 0, index = 0
bn = 0, index = 0
jfs_lookup: dtSearch returned -5