ffff888074583690: 00 00 00 00 00 00 00 00 80 2a 9d 8a ff ff ff ff .........*...... ffff8880745836a0: 00 02 00 00 00 00 00 00 a8 36 58 74 80 88 ff ff .........6Xt.... ffff8880745836b0: a8 36 58 74 80 88 ff ff 00 00 00 00 00 00 00 00 .6Xt............ ffff8880745836c0: c0 36 58 74 80 88 ff ff c0 36 58 74 80 88 ff ff .6Xt.....6Xt.... ffff8880745836d0: 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 ................ ffff8880745836e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ ffff8880745836f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ ================================================================== BUG: KASAN: slab-out-of-bounds in hex_dump_to_buffer+0x72a/0xb90 lib/hexdump.c:193 Read of size 1 at addr ffff888074583700 by task syz-executor946/3617 CPU: 1 PID: 3617 Comm: syz-executor946 Not tainted 6.0.0-syzkaller-02734-g0326074ff465 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 print_address_description+0x65/0x4b0 mm/kasan/report.c:317 print_report+0x108/0x1f0 mm/kasan/report.c:433 kasan_report+0xc3/0xf0 mm/kasan/report.c:495 hex_dump_to_buffer+0x72a/0xb90 lib/hexdump.c:193 print_hex_dump+0x131/0x260 lib/hexdump.c:276 ea_get+0xcfb/0x1290 fs/jfs/xattr.c:561 __jfs_getxattr+0xc4/0x400 fs/jfs/xattr.c:807 jfs_get_acl+0x70/0x140 fs/jfs/acl.c:38 get_acl+0x157/0x260 fs/posix_acl.c:152 posix_acl_create+0x126/0x420 fs/posix_acl.c:631 jfs_init_acl+0x9e/0x4d0 fs/jfs/acl.c:134 jfs_mkdir+0x1d4/0xb00 fs/jfs/namei.c:236 vfs_mkdir+0x3b3/0x590 fs/namei.c:4013 do_mkdirat+0x279/0x550 fs/namei.c:4038 __do_sys_mkdirat fs/namei.c:4053 [inline] __se_sys_mkdirat fs/namei.c:4051 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4051 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f5e9bc1ae79 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd2b6763e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f5e9bc1ae79 RDX: 00000000000001ff RSI: 0000000020005600 RDI: 0000000000000003 RBP: 00007f5e9bbda640 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000f8008000 R13: 0000000000000000 R14: 00080000000000f8 R15: 0000000000000000 Allocated by task 3617: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:437 [inline] __kasan_slab_alloc+0xa3/0xd0 mm/kasan/common.c:470 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:727 [inline] slab_alloc_node mm/slub.c:3248 [inline] slab_alloc mm/slub.c:3256 [inline] __kmem_cache_alloc_lru mm/slub.c:3263 [inline] kmem_cache_alloc_lru+0x175/0x2d0 mm/slub.c:3280 alloc_inode_sb include/linux/fs.h:3103 [inline] jfs_alloc_inode+0x21/0x60 fs/jfs/super.c:105 alloc_inode fs/inode.c:260 [inline] iget_locked+0x191/0x830 fs/inode.c:1287 jfs_iget+0x20/0x3b0 fs/jfs/inode.c:29 jfs_lookup+0x1bb/0x380 fs/jfs/namei.c:1462 __lookup_slow+0x266/0x3a0 fs/namei.c:1685 lookup_slow+0x53/0x70 fs/namei.c:1702 walk_component+0x2e1/0x410 fs/namei.c:1993 lookup_last fs/namei.c:2450 [inline] path_lookupat+0x17d/0x450 fs/namei.c:2474 filename_lookup+0x274/0x650 fs/namei.c:2503 user_path_at_empty+0x40/0x1a0 fs/namei.c:2876 user_path_at include/linux/namei.h:57 [inline] __do_sys_open_tree fs/namespace.c:2537 [inline] __se_sys_open_tree+0x1fa/0x8c0 fs/namespace.c:2504 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888074582e40 which belongs to the cache jfs_ip of size 2240 The buggy address is located 0 bytes to the right of 2240-byte region [ffff888074582e40, ffff888074583700) The buggy address belongs to the physical page: page:ffffea0001d16000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x74580 head:ffffea0001d16000 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff88801a742000 raw: 0000000000000000 00000000800d000d 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0xd2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_RECLAIMABLE), pid 3617, tgid 3617 (syz-executor946), ts 43105223388, free_ts 11621973673 prep_new_page mm/page_alloc.c:2532 [inline] get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4283 __alloc_pages+0x259/0x560 mm/page_alloc.c:5549 alloc_slab_page+0x70/0xf0 mm/slub.c:1829 allocate_slab+0x5e/0x520 mm/slub.c:1974 new_slab mm/slub.c:2034 [inline] ___slab_alloc+0x3ee/0xc40 mm/slub.c:3036 __slab_alloc mm/slub.c:3123 [inline] slab_alloc_node mm/slub.c:3214 [inline] slab_alloc mm/slub.c:3256 [inline] __kmem_cache_alloc_lru mm/slub.c:3263 [inline] kmem_cache_alloc_lru+0x225/0x2d0 mm/slub.c:3280 alloc_inode_sb include/linux/fs.h:3103 [inline] jfs_alloc_inode+0x21/0x60 fs/jfs/super.c:105 alloc_inode fs/inode.c:260 [inline] new_inode_pseudo+0x61/0x1d0 fs/inode.c:1019 new_inode+0x25/0x1d0 fs/inode.c:1047 jfs_fill_super+0x3fd/0xc50 fs/jfs/super.c:544 mount_bdev+0x26c/0x3a0 fs/super.c:1400 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x289/0xad0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1449 [inline] free_pcp_prepare+0x812/0x900 mm/page_alloc.c:1499 free_unref_page_prepare mm/page_alloc.c:3380 [inline] free_unref_page+0x7d/0x5f0 mm/page_alloc.c:3476 free_contig_range+0xa3/0x160 mm/page_alloc.c:9453 destroy_args+0xfe/0x91d mm/debug_vm_pgtable.c:1031 debug_vm_pgtable+0x43e/0x497 mm/debug_vm_pgtable.c:1354 do_one_initcall+0x1c9/0x400 init/main.c:1296 do_initcall_level+0x168/0x218 init/main.c:1369 do_initcalls+0x4b/0x8c init/main.c:1385 kernel_init_freeable+0x3f1/0x57b init/main.c:1623 kernel_init+0x19/0x2b0 init/main.c:1512 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Memory state around the buggy address: ffff888074583600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888074583680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888074583700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888074583780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888074583800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================