================================================================== BUG: KASAN: slab-out-of-bounds in hex_dump_to_buffer+0x731/0xba0 lib/hexdump.c:193 Read of size 1 at addr ffff88805c28c980 by task syz-executor.4/8109 CPU: 1 PID: 8109 Comm: syz-executor.4 Not tainted 6.9.0-rc6-syzkaller-00005-gb947cc5bf6d7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 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+0xce0/0x1290 fs/jfs/xattr.c:561 __jfs_getxattr+0xd5/0x380 fs/jfs/xattr.c:807 __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:3587 security_d_instantiate+0x9f/0x100 security/security.c:3915 d_splice_alias+0x6f/0x330 fs/dcache.c:2973 jfs_lookup+0x2c0/0x410 fs/jfs/namei.c:1474 __lookup_slow+0x28c/0x3f0 fs/namei.c:1692 lookup_slow+0x53/0x70 fs/namei.c:1709 walk_component+0x2e1/0x410 fs/namei.c:2004 lookup_last fs/namei.c:2461 [inline] path_lookupat+0x16f/0x450 fs/namei.c:2485 filename_lookup+0x256/0x610 fs/namei.c:2514 user_path_at_empty+0x42/0x60 fs/namei.c:2921 user_path_at include/linux/namei.h:57 [inline] path_setxattr+0xb2/0x2a0 fs/xattr.c:666 __do_sys_lsetxattr fs/xattr.c:694 [inline] __se_sys_lsetxattr fs/xattr.c:690 [inline] __x64_sys_lsetxattr+0xb8/0xd0 fs/xattr.c:690 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f01de67dea9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f01df4260c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 00007f01de7abf80 RCX: 00007f01de67dea9 RDX: 0000000020000040 RSI: 00000000200001c0 RDI: 0000000020000180 RBP: 00007f01de6ca4a4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000e01 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f01de7abf80 R15: 00007ffd94fcdbe8 Allocated by task 8109: 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:3798 [inline] slab_alloc_node mm/slub.c:3845 [inline] kmem_cache_alloc_lru+0x178/0x350 mm/slub.c:3864 alloc_inode_sb include/linux/fs.h:3091 [inline] 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_slow+0x28c/0x3f0 fs/namei.c:1692 lookup_slow+0x53/0x70 fs/namei.c:1709 walk_component+0x2e1/0x410 fs/namei.c:2004 lookup_last fs/namei.c:2461 [inline] path_lookupat+0x16f/0x450 fs/namei.c:2485 filename_lookup+0x256/0x610 fs/namei.c:2514 user_path_at_empty+0x42/0x60 fs/namei.c:2921 user_path_at include/linux/namei.h:57 [inline] path_setxattr+0xb2/0x2a0 fs/xattr.c:666 __do_sys_lsetxattr fs/xattr.c:694 [inline] __se_sys_lsetxattr fs/xattr.c:690 [inline] __x64_sys_lsetxattr+0xb8/0xd0 fs/xattr.c:690 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88805c28c0c0 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 [ffff88805c28c0c0, ffff88805c28c980) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88805c288940 pfn:0x5c288 head: order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888011e94101 flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff88801977ba00 dead000000000122 0000000000000000 raw: ffff88805c288940 00000000800d000b 00000001ffffffff ffff888011e94101 head: 00fff00000000840 ffff88801977ba00 dead000000000122 0000000000000000 head: ffff88805c288940 00000000800d000b 00000001ffffffff ffff888011e94101 head: 00fff00000000003 ffffea000170a201 dead000000000122 00000000ffffffff head: 0000000800000000 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 6742, tgid 2063022082 (syz-executor.1), ts 6744, free_ts 25008361939 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1534 prep_new_page mm/page_alloc.c:1541 [inline] get_page_from_freelist+0x3410/0x35b0 mm/page_alloc.c:3317 __alloc_pages+0x256/0x6c0 mm/page_alloc.c:4575 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page+0x5f/0x160 mm/slub.c:2175 allocate_slab mm/slub.c:2338 [inline] new_slab+0x84/0x2f0 mm/slub.c:2391 ___slab_alloc+0xc73/0x1260 mm/slub.c:3525 __slab_alloc mm/slub.c:3610 [inline] __slab_alloc_node mm/slub.c:3663 [inline] slab_alloc_node mm/slub.c:3835 [inline] kmem_cache_alloc_lru+0x253/0x350 mm/slub.c:3864 alloc_inode_sb include/linux/fs.h:3091 [inline] 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_fill_super+0x808/0xc50 fs/jfs/super.c:580 mount_bdev+0x20a/0x2d0 fs/super.c:1658 legacy_get_tree+0xee/0x190 fs/fs_context.c:662 vfs_get_tree+0x90/0x2a0 fs/super.c:1779 do_new_mount+0x2be/0xb40 fs/namespace.c:3352 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875 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:1141 [inline] free_unref_page_prepare+0x97b/0xaa0 mm/page_alloc.c:2347 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2487 free_contig_range+0x9e/0x160 mm/page_alloc.c:6572 destroy_args+0x8a/0x890 mm/debug_vm_pgtable.c:1036 debug_vm_pgtable+0x4be/0x550 mm/debug_vm_pgtable.c:1416 do_one_initcall+0x248/0x880 init/main.c:1245 do_initcall_level+0x157/0x210 init/main.c:1307 do_initcalls+0x3f/0x80 init/main.c:1323 kernel_init_freeable+0x435/0x5d0 init/main.c:1555 kernel_init+0x1d/0x2b0 init/main.c:1444 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: ffff88805c28c880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805c28c900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88805c28c980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88805c28ca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805c28ca80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================