ffff8880641236c0: c0 36 12 64 80 88 ff ff c0 36 12 64 80 88 ff ff .6.d.....6.d.... ffff8880641236d0: 00 00 00 00 00 00 00 00 04 00 00 00 00 00 00 00 ................ ffff8880641236e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ ffff8880641236f0: 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+0x731/0xba0 lib/hexdump.c:193 Read of size 1 at addr ffff888064123700 by task syz.3.92/5902 CPU: 1 PID: 5902 Comm: syz.3.92 Not tainted 6.10.0-rc5-syzkaller-00282-g8282d5af7be8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 hex_dump_to_buffer+0x731/0xba0 lib/hexdump.c:193 print_hex_dump+0x13f/0x250 lib/hexdump.c:276 ea_get+0xce7/0x1290 fs/jfs/xattr.c:563 __jfs_getxattr+0xd5/0x380 fs/jfs/xattr.c:809 __vfs_getxattr+0x433/0x470 fs/xattr.c:423 smk_fetch+0xb1/0x140 security/smack/smack_lsm.c:306 smack_d_instantiate+0x749/0xa50 security/smack/smack_lsm.c:3588 security_d_instantiate+0x9f/0x100 security/security.c:3916 d_splice_alias+0x6f/0x330 fs/dcache.c:2973 jfs_lookup+0x2c0/0x410 fs/jfs/namei.c:1474 lookup_one_qstr_excl+0x11f/0x260 fs/namei.c:1607 filename_create+0x297/0x540 fs/namei.c:3901 do_mkdirat+0xbd/0x3a0 fs/namei.c:4146 __do_sys_mkdir fs/namei.c:4174 [inline] __se_sys_mkdir fs/namei.c:4172 [inline] __x64_sys_mkdir+0x6e/0x80 fs/namei.c:4172 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4657775b99 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f46571ff048 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007f4657903fa0 RCX: 00007f4657775b99 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040 RBP: 00007f46577f677e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f4657903fa0 R15: 00007ffe05b9a428 Allocated by task 5902: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3940 [inline] slab_alloc_node mm/slub.c:4002 [inline] kmem_cache_alloc_lru_noprof+0x139/0x2b0 mm/slub.c:4021 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode fs/inode.c:261 [inline] iget_locked+0x1ad/0x850 fs/inode.c:1280 jfs_iget+0x22/0x3b0 fs/jfs/inode.c:29 jfs_lookup+0x226/0x410 fs/jfs/namei.c:1469 lookup_one_qstr_excl+0x11f/0x260 fs/namei.c:1607 filename_create+0x297/0x540 fs/namei.c:3901 do_mkdirat+0xbd/0x3a0 fs/namei.c:4146 __do_sys_mkdir fs/namei.c:4174 [inline] __se_sys_mkdir fs/namei.c:4172 [inline] __x64_sys_mkdir+0x6e/0x80 fs/namei.c:4172 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888064122e40 which belongs to the cache jfs_ip of size 2240 The buggy address is located 0 bytes to the right of allocated 2240-byte region [ffff888064122e40, ffff888064123700) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x64120 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888029999401 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000040 ffff88801a3ef500 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800d000d 00000001ffffefff ffff888029999401 head: 00fff00000000040 ffff88801a3ef500 dead000000000122 0000000000000000 head: 0000000000000000 00000000800d000d 00000001ffffefff ffff888029999401 head: 00fff00000000003 ffffea0001904801 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 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 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 5902, tgid 5901 (syz.3.92), ts 94835147779, free_ts 14667112843 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1473 prep_new_page mm/page_alloc.c:1481 [inline] get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3425 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4683 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2265 allocate_slab+0x5a/0x2f0 mm/slub.c:2428 new_slab mm/slub.c:2481 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3667 __slab_alloc+0x58/0xa0 mm/slub.c:3757 __slab_alloc_node mm/slub.c:3810 [inline] slab_alloc_node mm/slub.c:3990 [inline] kmem_cache_alloc_lru_noprof+0x1c5/0x2b0 mm/slub.c:4021 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode fs/inode.c:261 [inline] new_inode_pseudo+0x69/0x1e0 fs/inode.c:1007 new_inode+0x22/0x1d0 fs/inode.c:1033 diReadSpecial+0x52/0x680 fs/jfs/jfs_imap.c:423 jfs_mount+0x28b/0x830 fs/jfs/jfs_mount.c:138 jfs_fill_super+0x59c/0xc50 fs/jfs/super.c:556 mount_bdev+0x20a/0x2d0 fs/super.c:1659 legacy_get_tree+0xee/0x190 fs/fs_context.c:662 page last free pid 1 tgid 1 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1093 [inline] free_unref_page+0xd19/0xea0 mm/page_alloc.c:2588 free_contig_range+0x9e/0x160 mm/page_alloc.c:6642 destroy_args+0x8a/0x890 mm/debug_vm_pgtable.c:1017 debug_vm_pgtable+0x4be/0x550 mm/debug_vm_pgtable.c:1397 do_one_initcall+0x248/0x880 init/main.c:1267 do_initcall_level+0x157/0x210 init/main.c:1329 do_initcalls+0x3f/0x80 init/main.c:1345 kernel_init_freeable+0x435/0x5d0 init/main.c:1578 kernel_init+0x1d/0x2b0 init/main.c:1467 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffff888064123600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888064123680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888064123700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888064123780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888064123800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================