================================================================== BUG: KASAN: use-after-free in xsk_diag_put_info net/xdp/xsk_diag.c:21 [inline] BUG: KASAN: use-after-free in xsk_diag_fill net/xdp/xsk_diag.c:114 [inline] BUG: KASAN: use-after-free in xsk_diag_dump+0x1452/0x1970 net/xdp/xsk_diag.c:163 Read of size 4 at addr ffff888015fe40d0 by task syz-executor.5/23920 CPU: 0 PID: 23920 Comm: syz-executor.5 Not tainted 5.15.128-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description+0x63/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x16b/0x1c0 mm/kasan/report.c:451 xsk_diag_put_info net/xdp/xsk_diag.c:21 [inline] xsk_diag_fill net/xdp/xsk_diag.c:114 [inline] xsk_diag_dump+0x1452/0x1970 net/xdp/xsk_diag.c:163 netlink_dump+0x606/0xc40 net/netlink/af_netlink.c:2279 __netlink_dump_start+0x52f/0x6f0 net/netlink/af_netlink.c:2384 netlink_dump_start include/linux/netlink.h:258 [inline] xsk_diag_handler_dump+0x1d5/0x260 net/xdp/xsk_diag.c:190 sock_diag_rcv_msg+0xd5/0x400 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2505 sock_diag_rcv+0x26/0x40 net/core/sock_diag.c:276 netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline] netlink_unicast+0x7b6/0x980 net/netlink/af_netlink.c:1356 netlink_sendmsg+0xa30/0xd60 net/netlink/af_netlink.c:1924 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] sock_write_iter+0x39b/0x530 net/socket.c:1060 do_iter_readv_writev+0x594/0x7a0 do_iter_write+0x1ea/0x760 fs/read_write.c:855 vfs_writev fs/read_write.c:928 [inline] do_writev+0x281/0x470 fs/read_write.c:971 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+0x61/0xcb RIP: 0033:0x7f2340a27ae9 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:00007f233efa90c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007f2340b46f80 RCX: 00007f2340a27ae9 RDX: 0000000000000001 RSI: 0000000020000100 RDI: 0000000000000004 RBP: 00007f2340a7347a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f2340b46f80 R15: 00007ffc20de4038 Allocated by task 7635: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x8e/0xc0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x53/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233 kmem_cache_zalloc include/linux/slab.h:711 [inline] xfs_trans_dup+0xba/0x620 fs/xfs/xfs_trans.c:98 xfs_trans_roll+0x11c/0x4b0 fs/xfs/xfs_trans.c:1000 xfs_defer_trans_roll+0x46f/0x990 fs/xfs/libxfs/xfs_defer.c:297 xfs_defer_finish_noroll+0x3f6/0x1df0 fs/xfs/libxfs/xfs_defer.c:483 __xfs_trans_commit+0x4d1/0xdd0 fs/xfs/xfs_trans.c:852 xfs_iomap_write_unwritten+0x602/0xbf0 fs/xfs/xfs_iomap.c:580 xfs_end_ioend+0x239/0x670 fs/xfs/xfs_aops.c:130 xfs_end_io+0x2e1/0x360 fs/xfs/xfs_aops.c:159 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 The buggy address belongs to the object at ffff888015fe4000 which belongs to the cache xfs_trans of size 232 The buggy address is located 208 bytes inside of 232-byte region [ffff888015fe4000, ffff888015fe40e8) The buggy address belongs to the page: page:ffffea000057f900 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888015fe4378 pfn:0x15fe4 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 0000000000000000 0000000100000001 ffff8881466313c0 raw: ffff888015fe4378 00000000800d0000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 13604, ts 1020344626222, free_ts 1020337276562 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159 __alloc_pages+0x272/0x700 mm/page_alloc.c:5421 alloc_slab_page mm/slub.c:1775 [inline] allocate_slab mm/slub.c:1912 [inline] new_slab+0xbb/0x4b0 mm/slub.c:1975 ___slab_alloc+0x6f6/0xe10 mm/slub.c:3008 __slab_alloc mm/slub.c:3095 [inline] slab_alloc_node mm/slub.c:3186 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x18e/0x280 mm/slub.c:3233 kmem_cache_zalloc include/linux/slab.h:711 [inline] xfs_trans_alloc+0x7d/0x7f0 fs/xfs/xfs_trans.c:266 xfs_trans_alloc_inode+0x129/0x450 fs/xfs/xfs_trans.c:1047 xfs_attr_set+0x848/0x1460 fs/xfs/libxfs/xfs_attr.c:772 __xfs_set_acl+0x251/0x3d0 fs/xfs/xfs_acl.c:205 xfs_set_acl+0x267/0x650 fs/xfs/xfs_acl.c:271 set_posix_acl fs/posix_acl.c:947 [inline] posix_acl_xattr_set+0x33b/0x3a0 fs/posix_acl.c:966 __vfs_removexattr+0x3ce/0x410 fs/xattr.c:470 __vfs_removexattr_locked+0x1fe/0x410 fs/xattr.c:505 vfs_removexattr+0xff/0x2a0 fs/xattr.c:527 ovl_workdir_create+0x4f1/0x7d0 fs/overlayfs/super.c:823 ovl_get_indexdir+0x182/0x450 fs/overlayfs/super.c:1556 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317 free_unref_page_list+0x1f7/0x8e0 mm/page_alloc.c:3433 release_pages+0x1bb9/0x1f40 mm/swap.c:963 __pagevec_release+0x80/0xf0 mm/swap.c:983 pagevec_release include/linux/pagevec.h:81 [inline] truncate_inode_pages_range+0x48b/0x1290 mm/truncate.c:329 kill_bdev block/bdev.c:77 [inline] blkdev_flush_mapping+0x182/0x340 block/bdev.c:659 blkdev_put_whole block/bdev.c:690 [inline] blkdev_put+0x4f1/0x790 block/bdev.c:954 deactivate_locked_super+0xa0/0x110 fs/super.c:335 cleanup_mnt+0x44e/0x500 fs/namespace.c:1143 task_work_run+0x129/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:175 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x61/0xcb Memory state around the buggy address: ffff888015fe3f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888015fe4000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888015fe4080: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc ^ ffff888015fe4100: fc fc fc fc fc fb fb fb fb fb fb fb fb fb fb fb ffff888015fe4180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================