ffff88808190e500: 00 e5 90 81 80 88 ff ff 00 e5 90 81 80 88 ff ff ................ ffff88808190e510: 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 ................ ffff88808190e520: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ ffff88808190e530: 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/0xb80 lib/hexdump.c:193 Read of size 1 at addr ffff88808190e540 by task syz-executor.2/20942 CPU: 1 PID: 20942 Comm: syz-executor.2 Not tainted 6.0.0-syzkaller-05118-g833477fce7a1 #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+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description+0x65/0x4b0 mm/kasan/report.c:317 print_report+0x108/0x220 mm/kasan/report.c:433 kasan_report+0xfb/0x130 mm/kasan/report.c:495 hex_dump_to_buffer+0x72a/0xb80 lib/hexdump.c:193 print_hex_dump+0x13e/0x270 lib/hexdump.c:276 ea_get+0xccc/0x1280 fs/jfs/xattr.c:561 __jfs_getxattr+0xd0/0x390 fs/jfs/xattr.c:807 __vfs_getxattr+0x3de/0x410 fs/xattr.c:407 smk_fetch+0xb0/0x140 security/smack/smack_lsm.c:295 smack_d_instantiate+0x5c4/0xa10 security/smack/smack_lsm.c:3423 security_d_instantiate+0xa5/0x100 security/security.c:2061 d_splice_alias+0x6e/0x3b0 fs/dcache.c:3155 jfs_lookup+0x2b9/0x400 fs/jfs/namei.c:1467 lookup_open fs/namei.c:3391 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0x10f8/0x2e00 fs/namei.c:3688 do_filp_open+0x275/0x500 fs/namei.c:3718 do_sys_openat2+0x13b/0x500 fs/open.c:1313 do_sys_open fs/open.c:1329 [inline] __do_sys_open fs/open.c:1337 [inline] __se_sys_open fs/open.c:1333 [inline] __x64_sys_open+0x221/0x270 fs/open.c:1333 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7effaca8a5a9 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007effadb0c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007effacbabf80 RCX: 00007effaca8a5a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000340 RBP: 00007effacae5580 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffea8e7c4cf R14: 00007effadb0c300 R15: 0000000000022000 Allocated by task 20942: 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+0xb2/0xe0 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+0x221/0x400 fs/jfs/namei.c:1462 lookup_open fs/namei.c:3391 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0x10f8/0x2e00 fs/namei.c:3688 do_filp_open+0x275/0x500 fs/namei.c:3718 do_sys_openat2+0x13b/0x500 fs/open.c:1313 do_sys_open fs/open.c:1329 [inline] __do_sys_open fs/open.c:1337 [inline] __se_sys_open fs/open.c:1333 [inline] __x64_sys_open+0x221/0x270 fs/open.c:1333 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88808190dc80 which belongs to the cache jfs_ip of size 2240 The buggy address is located 0 bytes to the right of 2240-byte region [ffff88808190dc80, ffff88808190e540) The buggy address belongs to the physical page: page:ffffea0002064200 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888081908000 pfn:0x81908 head:ffffea0002064200 order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff88807ef23b01 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff88814678f280 raw: ffff888081908000 00000000800d0008 00000001ffffffff ffff88807ef23b01 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 4817, tgid 4814 (syz-executor.5), ts 229574670444, free_ts 228840417101 prep_new_page mm/page_alloc.c:2532 [inline] get_page_from_freelist+0x72b/0x7a0 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+0x42e/0xce0 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+0x2e3/0x3d0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 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/0x630 mm/page_alloc.c:3476 free_slab mm/slub.c:2073 [inline] discard_slab mm/slub.c:2079 [inline] __unfreeze_partials+0x1ab/0x200 mm/slub.c:2553 put_cpu_partial+0x116/0x180 mm/slub.c:2629 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:447 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] kmem_cache_alloc_node+0x1cc/0x350 mm/slub.c:3298 __alloc_skb+0xd5/0x620 net/core/skbuff.c:497 alloc_skb include/linux/skbuff.h:1265 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1191 [inline] netlink_sendmsg+0x774/0xcd0 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0x597/0x8e0 net/socket.c:2482 ___sys_sendmsg net/socket.c:2536 [inline] __sys_sendmsg+0x28e/0x390 net/socket.c:2565 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff88808190e400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88808190e480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88808190e500: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff88808190e580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88808190e600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================