loop0: detected capacity change from 0 to 32768 ================================================================================ UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dmap.c:2325:2 index 2000 is out of range for type 's64[128]' (aka 'long long[128]') CPU: 0 PID: 4424 Comm: syz-executor.0 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Call trace: dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __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 ubsan_epilogue+0x14/0x48 lib/ubsan.c:151 __ubsan_handle_out_of_bounds+0xd4/0x108 lib/ubsan.c:282 dbAllocBits+0x874/0x8bc fs/jfs/jfs_dmap.c:2325 dbAllocDmap fs/jfs/jfs_dmap.c:2102 [inline] dbAllocNear+0x25c/0x350 fs/jfs/jfs_dmap.c:1315 dbAlloc+0x760/0x978 fs/jfs/jfs_dmap.c:832 ea_get+0x704/0xf0c fs/jfs/xattr.c:516 __jfs_setxattr+0x3dc/0xfe8 fs/jfs/xattr.c:727 __jfs_set_acl+0x108/0x1a4 fs/jfs/acl.c:87 jfs_set_acl+0x194/0x300 fs/jfs/acl.c:114 set_posix_acl fs/posix_acl.c:947 [inline] posix_acl_xattr_set+0x2cc/0x378 fs/posix_acl.c:966 __vfs_setxattr+0x388/0x3a4 fs/xattr.c:182 __vfs_setxattr_noperm+0x120/0x564 fs/xattr.c:216 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:277 vfs_setxattr+0x158/0x2ac fs/xattr.c:303 do_setxattr fs/xattr.c:588 [inline] setxattr+0x248/0x2ac fs/xattr.c:611 path_setxattr+0x12c/0x25c fs/xattr.c:630 __do_sys_lsetxattr fs/xattr.c:653 [inline] __se_sys_lsetxattr fs/xattr.c:649 [inline] __arm64_sys_lsetxattr+0xbc/0xd8 fs/xattr.c:649 __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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 ================================================================================ ================================================================== BUG: KASAN: slab-out-of-bounds in dbAllocBits+0x794/0x8bc fs/jfs/jfs_dmap.c:2325 Read of size 8 at addr ffff0000c13ebeb8 by task syz-executor.0/4424 CPU: 0 PID: 4424 Comm: syz-executor.0 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Call trace: dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 print_address_description+0x78/0x30c mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xec/0x15c mm/kasan/report.c:451 __asan_report_load8_noabort+0x44/0x50 mm/kasan/report_generic.c:309 dbAllocBits+0x794/0x8bc fs/jfs/jfs_dmap.c:2325 dbAllocDmap fs/jfs/jfs_dmap.c:2102 [inline] dbAllocNear+0x25c/0x350 fs/jfs/jfs_dmap.c:1315 dbAlloc+0x760/0x978 fs/jfs/jfs_dmap.c:832 ea_get+0x704/0xf0c fs/jfs/xattr.c:516 __jfs_setxattr+0x3dc/0xfe8 fs/jfs/xattr.c:727 __jfs_set_acl+0x108/0x1a4 fs/jfs/acl.c:87 jfs_set_acl+0x194/0x300 fs/jfs/acl.c:114 set_posix_acl fs/posix_acl.c:947 [inline] posix_acl_xattr_set+0x2cc/0x378 fs/posix_acl.c:966 __vfs_setxattr+0x388/0x3a4 fs/xattr.c:182 __vfs_setxattr_noperm+0x120/0x564 fs/xattr.c:216 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:277 vfs_setxattr+0x158/0x2ac fs/xattr.c:303 do_setxattr fs/xattr.c:588 [inline] setxattr+0x248/0x2ac fs/xattr.c:611 path_setxattr+0x12c/0x25c fs/xattr.c:630 __do_sys_lsetxattr fs/xattr.c:653 [inline] __se_sys_lsetxattr fs/xattr.c:649 [inline] __arm64_sys_lsetxattr+0xbc/0xd8 fs/xattr.c:649 __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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/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 ffff0000c13eb000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1720 bytes to the right of 2048-byte region [ffff0000c13eb000, ffff0000c13eb800) The buggy address belongs to the page: page:0000000047ccb3a7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1013e8 head:0000000047ccb3a7 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c0002900 raw: 0000000000000000 0000000080080008 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000c13ebd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000c13ebe00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff0000c13ebe80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000c13ebf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000c13ebf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== JFS: metapage_get_blocks failed ERROR: (device loop0): release_metapage: write_one_page() failed ERROR: (device loop0): remounting filesystem as read-only