svc: failed to register nfsdv3 RPC service (errno 101). svc: failed to register nfsaclv3 RPC service (errno 101). ================================================================== BUG: KASAN: slab-use-after-free in shrinker_free+0x3b7/0x430 mm/shrinker.c:775 Read of size 4 at addr ffff88802fe35d1c by task syz.1.3567/22927 CPU: 0 UID: 0 PID: 22927 Comm: syz.1.3567 Not tainted 6.12.0-rc2-syzkaller-00074-gd3d1556696c1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 shrinker_free+0x3b7/0x430 mm/shrinker.c:775 nfsd_file_cache_shutdown+0xbc/0x4e0 fs/nfsd/filecache.c:923 nfsd_shutdown_generic fs/nfsd/nfssvc.c:314 [inline] nfsd_shutdown_generic fs/nfsd/nfssvc.c:308 [inline] nfsd_startup_net fs/nfsd/nfssvc.c:429 [inline] nfsd_svc+0x6a9/0x940 fs/nfsd/nfssvc.c:820 nfsd_nl_threads_set_doit+0x535/0xbe0 fs/nfsd/nfsctl.c:1722 genl_family_rcv_msg_doit+0x202/0x2f0 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x565/0x800 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg net/socket.c:744 [inline] ____sys_sendmsg+0x9ae/0xb40 net/socket.c:2602 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2656 __sys_sendmsg+0x117/0x1f0 net/socket.c:2685 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5730d7dff9 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:00007f5731a97038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f5730f36058 RCX: 00007f5730d7dff9 RDX: 0000000000008004 RSI: 0000000020000140 RDI: 0000000000000006 RBP: 00007f5730df0296 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f5730f36058 R15: 00007fffd036add8 Allocated by task 22856: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394 kmalloc_noprof include/linux/slab.h:878 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] shrinker_alloc+0xf8/0xb00 mm/shrinker.c:683 nfsd_file_cache_init+0x1cb/0x4c0 fs/nfsd/filecache.c:775 nfsd_startup_generic fs/nfsd/nfssvc.c:292 [inline] nfsd_startup_net fs/nfsd/nfssvc.c:387 [inline] nfsd_svc+0x5db/0x940 fs/nfsd/nfssvc.c:820 nfsd_nl_threads_set_doit+0x535/0xbe0 fs/nfsd/nfsctl.c:1722 genl_family_rcv_msg_doit+0x202/0x2f0 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x565/0x800 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg net/socket.c:744 [inline] ____sys_sendmsg+0x9ae/0xb40 net/socket.c:2602 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2656 __sys_sendmsg+0x117/0x1f0 net/socket.c:2685 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 11: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:2342 [inline] slab_free mm/slub.c:4579 [inline] kfree+0x14f/0x4b0 mm/slub.c:4727 rcu_do_batch kernel/rcu/tree.c:2567 [inline] rcu_core+0x79d/0x14d0 kernel/rcu/tree.c:2823 handle_softirqs+0x213/0x8f0 kernel/softirq.c:554 do_softirq kernel/softirq.c:455 [inline] do_softirq+0xb2/0xf0 kernel/softirq.c:442 __local_bh_enable_ip+0x100/0x120 kernel/softirq.c:382 spin_unlock_bh include/linux/spinlock.h:396 [inline] cfg80211_inform_single_bss_data+0x974/0x1e40 net/wireless/scan.c:2349 cfg80211_inform_bss_data+0x254/0x3e30 net/wireless/scan.c:3184 cfg80211_inform_bss_frame_data+0x253/0x8a0 net/wireless/scan.c:3279 ieee80211_bss_info_update+0x311/0xab0 net/mac80211/scan.c:226 ieee80211_rx_bss_info net/mac80211/ibss.c:1100 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1579 [inline] ieee80211_ibss_rx_queued_mgmt+0x1952/0x3030 net/mac80211/ibss.c:1606 ieee80211_iface_process_skb net/mac80211/iface.c:1603 [inline] ieee80211_iface_work+0xc0b/0xf00 net/mac80211/iface.c:1657 cfg80211_wiphy_work+0x3d9/0x550 net/wireless/core.c:440 process_one_work+0x958/0x1b30 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Last potentially related work creation: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:541 __call_rcu_common.constprop.0+0x99/0x7a0 kernel/rcu/tree.c:3086 shrinker_free+0xfe/0x430 mm/shrinker.c:807 nfsd_file_cache_shutdown+0xbc/0x4e0 fs/nfsd/filecache.c:923 nfsd_shutdown_generic fs/nfsd/nfssvc.c:314 [inline] nfsd_shutdown_generic fs/nfsd/nfssvc.c:308 [inline] nfsd_startup_net fs/nfsd/nfssvc.c:429 [inline] nfsd_svc+0x6a9/0x940 fs/nfsd/nfssvc.c:820 nfsd_nl_threads_set_doit+0x535/0xbe0 fs/nfsd/nfsctl.c:1722 genl_family_rcv_msg_doit+0x202/0x2f0 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x565/0x800 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg net/socket.c:744 [inline] ____sys_sendmsg+0x9ae/0xb40 net/socket.c:2602 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2656 __sys_sendmsg+0x117/0x1f0 net/socket.c:2685 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88802fe35d00 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 28 bytes inside of freed 192-byte region [ffff88802fe35d00, ffff88802fe35dc0) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88802fe35c00 pfn:0x2fe35 flags: 0xfff00000000200(workingset|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000200 ffff88801ac413c0 ffffea0000b76590 ffffea0001e9f590 raw: ffff88802fe35c00 000000000010000f 00000001f5000000 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 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 5235, tgid 5235 (syz-executor), ts 140013155476, free_ts 140006145667 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x101e/0x3070 mm/page_alloc.c:3457 __alloc_pages_noprof+0x223/0x25a0 mm/page_alloc.c:4733 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_slab_page mm/slub.c:2414 [inline] allocate_slab mm/slub.c:2578 [inline] new_slab+0xca/0x3f0 mm/slub.c:2631 ___slab_alloc+0xd1d/0x16f0 mm/slub.c:3818 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3908 __slab_alloc_node mm/slub.c:3961 [inline] slab_alloc_node mm/slub.c:4122 [inline] __do_kmalloc_node mm/slub.c:4263 [inline] __kmalloc_node_noprof+0x367/0x440 mm/slub.c:4270 kmalloc_array_node_noprof include/linux/slab.h:995 [inline] alloc_slab_obj_exts+0x41/0xa0 mm/slub.c:1968 __memcg_slab_post_alloc_hook+0x2a7/0x9b0 mm/memcontrol.c:2982 memcg_slab_post_alloc_hook mm/slub.c:2156 [inline] slab_post_alloc_hook mm/slub.c:4095 [inline] slab_alloc_node mm/slub.c:4134 [inline] kmem_cache_alloc_lru_noprof+0x2c8/0x2f0 mm/slub.c:4153 __d_alloc+0x35/0x8c0 fs/dcache.c:1636 d_alloc_pseudo+0x1c/0xc0 fs/dcache.c:1768 alloc_path_pseudo fs/file_table.c:337 [inline] alloc_file_pseudo+0xd2/0x200 fs/file_table.c:353 sock_alloc_file+0x50/0x1d0 net/socket.c:468 sock_map_fd net/socket.c:493 [inline] __sys_socket+0x1c2/0x260 net/socket.c:1720 __do_sys_socket net/socket.c:1725 [inline] __se_sys_socket net/socket.c:1723 [inline] __x64_sys_socket+0x72/0xb0 net/socket.c:1723 page last free pid 5217 tgid 5217 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_page+0x5f4/0xdc0 mm/page_alloc.c:2638 __put_partials+0x14c/0x170 mm/slub.c:3145 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:247 [inline] slab_post_alloc_hook mm/slub.c:4085 [inline] slab_alloc_node mm/slub.c:4134 [inline] kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4141 new_handle fs/jbd2/transaction.c:461 [inline] jbd2__journal_start+0x193/0x6a0 fs/jbd2/transaction.c:488 __ext4_journal_start_sb+0x358/0x660 fs/ext4/ext4_jbd2.c:112 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline] ext4_dirty_inode+0xa1/0x130 fs/ext4/inode.c:5981 __mark_inode_dirty+0x1f6/0xe60 fs/fs-writeback.c:2493 generic_update_time+0xcf/0xf0 fs/inode.c:2043 inode_update_time fs/inode.c:2056 [inline] __file_update_time fs/inode.c:2245 [inline] file_update_time+0x12e/0x160 fs/inode.c:2275 ext4_page_mkwrite+0x368/0x1760 fs/ext4/inode.c:6102 do_page_mkwrite+0x177/0x380 mm/memory.c:3162 wp_page_shared mm/memory.c:3563 [inline] do_wp_page+0xcbf/0x4930 mm/memory.c:3713 handle_pte_fault mm/memory.c:5767 [inline] __handle_mm_fault+0x1a93/0x2a10 mm/memory.c:5894 Memory state around the buggy address: ffff88802fe35c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802fe35c80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff88802fe35d00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88802fe35d80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff88802fe35e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================