netlink: 112 bytes leftover after parsing attributes in process `syz.5.164'. ================================================================== BUG: KASAN: slab-out-of-bounds in addressPXD fs/jfs/jfs_types.h:80 [inline] BUG: KASAN: slab-out-of-bounds in dtReadFirst+0x408/0x7b8 fs/jfs/jfs_dtree.c:3120 Read of size 4 at addr ffff0000f03af778 by task syz.5.164/7723 CPU: 0 UID: 0 PID: 7723 Comm: syz.5.164 Not tainted 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 print_address_description+0xa8/0x238 mm/kasan/report.c:378 print_report+0x68/0x84 mm/kasan/report.c:482 kasan_report+0xb0/0x110 mm/kasan/report.c:595 __asan_report_load4_noabort+0x20/0x2c mm/kasan/report_generic.c:380 addressPXD fs/jfs/jfs_types.h:80 [inline] dtReadFirst+0x408/0x7b8 fs/jfs/jfs_dtree.c:3120 jfs_readdir+0x548/0x3018 fs/jfs/jfs_dtree.c:2832 wrap_directory_iterator+0x90/0xf0 fs/readdir.c:65 shared_jfs_readdir+0x30/0x40 fs/jfs/namei.c:1540 iterate_dir+0x2dc/0x478 fs/readdir.c:108 __do_sys_getdents64 fs/readdir.c:410 [inline] __se_sys_getdents64 fs/readdir.c:396 [inline] __arm64_sys_getdents64+0x110/0x2fc fs/readdir.c:396 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Allocated by task 7723: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_alloc_info+0x44/0x54 mm/kasan/generic.c:562 unpoison_slab_object mm/kasan/common.c:330 [inline] __kasan_slab_alloc+0x70/0x88 mm/kasan/common.c:356 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4180 [inline] slab_alloc_node mm/slub.c:4229 [inline] kmem_cache_alloc_lru_noprof+0x23c/0x3ec mm/slub.c:4248 jfs_alloc_inode+0x2c/0x68 fs/jfs/super.c:105 alloc_inode+0x68/0x19c fs/inode.c:346 new_inode+0x2c/0x130 fs/inode.c:1145 diReadSpecial+0x58/0x5e0 fs/jfs/jfs_imap.c:426 jfs_mount+0x304/0x750 fs/jfs/jfs_mount.c:166 jfs_fill_super+0x53c/0xb6c fs/jfs/super.c:523 get_tree_bdev_flags+0x360/0x414 fs/super.c:1692 get_tree_bdev+0x2c/0x3c fs/super.c:1715 jfs_get_tree+0x28/0x38 fs/jfs/super.c:635 vfs_get_tree+0x90/0x28c fs/super.c:1815 do_new_mount+0x278/0x7f4 fs/namespace.c:3805 path_mount+0x5b4/0xde0 fs/namespace.c:4120 do_mount fs/namespace.c:4133 [inline] __do_sys_mount fs/namespace.c:4344 [inline] __se_sys_mount fs/namespace.c:4321 [inline] __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4321 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 The buggy address belongs to the object at ffff0000f03aeea0 which belongs to the cache jfs_ip of size 2232 The buggy address is located 32 bytes to the right of allocated 2232-byte region [ffff0000f03aeea0, ffff0000f03af758) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff0000f03a8000 pfn:0x1303a8 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff0000cd30c101 anon flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 05ffc00000000040 ffff0000c490a780 0000000000000000 0000000000000001 raw: ffff0000f03a8000 00000000800d0009 00000000f5000000 ffff0000cd30c101 head: 05ffc00000000040 ffff0000c490a780 0000000000000000 0000000000000001 head: ffff0000f03a8000 00000000800d0009 00000000f5000000 ffff0000cd30c101 head: 05ffc00000000003 fffffdffc3c0ea01 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000f03af600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000f03af680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000f03af700: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc ^ ffff0000f03af780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000f03af800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== MetaData crosses page boundary!! lblock = 1be040b, size = 94208 CPU: 1 UID: 0 PID: 7723 Comm: syz.5.164 Tainted: G B 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 __get_metapage+0x9a8/0xe8c fs/jfs/jfs_metapage.c:705 dtReadFirst+0xcc/0x7b8 fs/jfs/jfs_dtree.c:3079 jfs_readdir+0x548/0x3018 fs/jfs/jfs_dtree.c:2832 wrap_directory_iterator+0x90/0xf0 fs/readdir.c:65 shared_jfs_readdir+0x30/0x40 fs/jfs/namei.c:1540 iterate_dir+0x2dc/0x478 fs/readdir.c:108 __do_sys_getdents64 fs/readdir.c:410 [inline] __se_sys_getdents64 fs/readdir.c:396 [inline] __arm64_sys_getdents64+0x110/0x2fc fs/readdir.c:396 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 bread failed!