(syz.5.130,7207,0):ocfs2_mknod:502 ERROR: status = -117 (syz.5.130,7207,1):ocfs2_find_entry:1086 ERROR: status = -117 ================================================================== BUG: KASAN: slab-use-after-free in ocfs2_dir_foreach_blk_id fs/ocfs2/dir.c:1787 [inline] BUG: KASAN: slab-use-after-free in ocfs2_dir_foreach_blk+0x132c/0x1b20 fs/ocfs2/dir.c:1925 Read of size 2 at addr ffff88806a5d88c9 by task syz.5.130/7207 CPU: 1 UID: 0 PID: 7207 Comm: syz.5.130 Not tainted 6.14.0-rc5-syzkaller-00016-g48a5eed9ad58 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0x16e/0x5b0 mm/kasan/report.c:521 kasan_report+0x143/0x180 mm/kasan/report.c:634 ocfs2_dir_foreach_blk_id fs/ocfs2/dir.c:1787 [inline] ocfs2_dir_foreach_blk+0x132c/0x1b20 fs/ocfs2/dir.c:1925 ocfs2_readdir+0x2a1/0x5e0 fs/ocfs2/dir.c:1969 wrap_directory_iterator+0x91/0xd0 fs/readdir.c:65 iterate_dir+0x5a9/0x760 fs/readdir.c:108 __do_sys_getdents fs/readdir.c:322 [inline] __se_sys_getdents+0x1fd/0x4e0 fs/readdir.c:308 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: 0033:0x7fe6f238d169 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:00007fe6f3133038 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 00007fe6f25a5fa0 RCX: 00007fe6f238d169 RDX: 00000000000000bb RSI: ffffffff81000000 RDI: 0000000000000004 RBP: 00007fe6f240e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe6f25a5fa0 R15: 00007ffd8a0624c8 Allocated by task 7168: 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:319 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4115 [inline] slab_alloc_node mm/slub.c:4164 [inline] kmem_cache_alloc_node_noprof+0x1d9/0x380 mm/slub.c:4216 kmalloc_reserve+0xa8/0x2a0 net/core/skbuff.c:515 __alloc_skb+0x1f3/0x440 net/core/skbuff.c:606 alloc_skb include/linux/skbuff.h:1331 [inline] nlmsg_new include/net/netlink.h:1018 [inline] mpls_netconf_notify_devconf+0x42/0xf0 net/mpls/af_mpls.c:1189 mpls_dev_sysctl_register+0x1db/0x280 net/mpls/af_mpls.c:1409 mpls_add_dev net/mpls/af_mpls.c:1460 [inline] mpls_dev_notify+0x33f/0x7a0 net/mpls/af_mpls.c:1600 notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2244 [inline] call_netdevice_notifiers net/core/dev.c:2258 [inline] register_netdevice+0x16b5/0x1b60 net/core/dev.c:10978 team_newlink+0x10a/0x170 drivers/net/team/team_core.c:2228 rtnl_newlink_create+0x2ee/0xa40 net/core/rtnetlink.c:3796 __rtnl_newlink net/core/rtnetlink.c:3907 [inline] rtnl_newlink+0x17cc/0x1d30 net/core/rtnetlink.c:4022 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6912 netlink_rcv_skb+0x206/0x480 net/netlink/af_netlink.c:2533 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1882 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:733 __sys_sendto+0x363/0x4c0 net/socket.c:2187 __do_sys_sendto net/socket.c:2194 [inline] __se_sys_sendto net/socket.c:2190 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2190 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 Freed by task 7168: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2353 [inline] slab_free mm/slub.c:4609 [inline] kmem_cache_free+0x195/0x410 mm/slub.c:4711 skb_kfree_head net/core/skbuff.c:994 [inline] skb_free_head net/core/skbuff.c:1008 [inline] skb_release_data+0x677/0x8a0 net/core/skbuff.c:1035 skb_release_all net/core/skbuff.c:1100 [inline] __kfree_skb net/core/skbuff.c:1114 [inline] consume_skb+0x9f/0xf0 net/core/skbuff.c:1346 netlink_broadcast_filtered+0x116d/0x12a0 net/netlink/af_netlink.c:1523 nlmsg_multicast_filtered include/net/netlink.h:1128 [inline] nlmsg_multicast include/net/netlink.h:1147 [inline] nlmsg_notify+0xfb/0x1c0 net/netlink/af_netlink.c:2576 mpls_dev_sysctl_register+0x1db/0x280 net/mpls/af_mpls.c:1409 mpls_add_dev net/mpls/af_mpls.c:1460 [inline] mpls_dev_notify+0x33f/0x7a0 net/mpls/af_mpls.c:1600 notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2244 [inline] call_netdevice_notifiers net/core/dev.c:2258 [inline] register_netdevice+0x16b5/0x1b60 net/core/dev.c:10978 team_newlink+0x10a/0x170 drivers/net/team/team_core.c:2228 rtnl_newlink_create+0x2ee/0xa40 net/core/rtnetlink.c:3796 __rtnl_newlink net/core/rtnetlink.c:3907 [inline] rtnl_newlink+0x17cc/0x1d30 net/core/rtnetlink.c:4022 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6912 netlink_rcv_skb+0x206/0x480 net/netlink/af_netlink.c:2533 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1882 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:733 __sys_sendto+0x363/0x4c0 net/socket.c:2187 __do_sys_sendto net/socket.c:2194 [inline] __se_sys_sendto net/socket.c:2190 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2190 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 ffff88806a5d8680 which belongs to the cache skbuff_small_head of size 704 The buggy address is located 585 bytes inside of freed 704-byte region [ffff88806a5d8680, ffff88806a5d8940) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6a5d8 head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff88801e287b40 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000130013 00000000f5000000 0000000000000000 head: 00fff00000000040 ffff88801e287b40 dead000000000100 dead000000000122 head: 0000000000000000 0000000000130013 00000000f5000000 0000000000000000 head: 00fff00000000002 ffffea0001a97601 ffffffffffffffff 0000000000000000 head: 0000000000000004 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 66, tgid 66 (kworker/u8:4), ts 86509356280, free_ts 85035282138 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551 prep_new_page mm/page_alloc.c:1559 [inline] get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3477 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4739 alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270 alloc_slab_page mm/slub.c:2423 [inline] allocate_slab+0x8f/0x3a0 mm/slub.c:2587 new_slab mm/slub.c:2640 [inline] ___slab_alloc+0xc27/0x14a0 mm/slub.c:3826 __slab_alloc+0x58/0xa0 mm/slub.c:3916 __slab_alloc_node mm/slub.c:3991 [inline] slab_alloc_node mm/slub.c:4152 [inline] kmem_cache_alloc_node_noprof+0x269/0x380 mm/slub.c:4216 kmalloc_reserve+0xa8/0x2a0 net/core/skbuff.c:515 __alloc_skb+0x1f3/0x440 net/core/skbuff.c:606 alloc_skb include/linux/skbuff.h:1331 [inline] nlmsg_new include/net/netlink.h:1018 [inline] inet6_rt_notify+0xba/0x240 net/ipv6/route.c:6218 fib6_del_route net/ipv6/ip6_fib.c:2005 [inline] fib6_del+0x10bc/0x1600 net/ipv6/ip6_fib.c:2040 fib6_clean_node+0x2f7/0x5e0 net/ipv6/ip6_fib.c:2202 fib6_walk_continue+0x658/0x8f0 net/ipv6/ip6_fib.c:2124 fib6_walk+0x168/0x2b0 net/ipv6/ip6_fib.c:2172 fib6_clean_tree net/ipv6/ip6_fib.c:2252 [inline] __fib6_clean_all+0x31f/0x4b0 net/ipv6/ip6_fib.c:2268 page last free pid 66 tgid 66 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_frozen_pages+0xe04/0x10e0 mm/page_alloc.c:2660 stack_depot_save_flags+0x7c6/0x940 lib/stackdepot.c:674 kasan_save_stack mm/kasan/common.c:48 [inline] kasan_save_track+0x51/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2353 [inline] slab_free mm/slub.c:4609 [inline] kmem_cache_free+0x195/0x410 mm/slub.c:4711 skb_kfree_head net/core/skbuff.c:994 [inline] skb_free_head net/core/skbuff.c:1008 [inline] skb_release_data+0x677/0x8a0 net/core/skbuff.c:1035 skb_release_all net/core/skbuff.c:1100 [inline] __kfree_skb net/core/skbuff.c:1114 [inline] consume_skb+0x9f/0xf0 net/core/skbuff.c:1346 mac80211_hwsim_beacon_tx+0x3bf/0x850 drivers/net/wireless/virtual/mac80211_hwsim.c:2315 __iterate_interfaces+0x297/0x570 net/mac80211/util.c:760 ieee80211_iterate_active_interfaces_atomic+0xd8/0x170 net/mac80211/util.c:796 mac80211_hwsim_beacon+0xd4/0x1f0 drivers/net/wireless/virtual/mac80211_hwsim.c:2345 __run_hrtimer kernel/time/hrtimer.c:1801 [inline] __hrtimer_run_queues+0x59b/0xd30 kernel/time/hrtimer.c:1865 hrtimer_run_softirq+0x19a/0x2c0 kernel/time/hrtimer.c:1882 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561 do_softirq+0x11b/0x1e0 kernel/softirq.c:462 Memory state around the buggy address: ffff88806a5d8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88806a5d8800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88806a5d8880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88806a5d8900: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff88806a5d8980: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb ==================================================================