loop0: detected capacity change from 0 to 32768 ================================================================== BUG: KASAN: slab-use-after-free in dtCompare fs/jfs/jfs_dtree.c:3345 [inline] BUG: KASAN: slab-use-after-free in dtSearch+0x1683/0x21b0 fs/jfs/jfs_dtree.c:650 Read of size 1 at addr ffff8880410f86c8 by task syz.0.19/6102 CPU: 1 UID: 0 PID: 6102 Comm: syz.0.19 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 dtCompare fs/jfs/jfs_dtree.c:3345 [inline] dtSearch+0x1683/0x21b0 fs/jfs/jfs_dtree.c:650 jfs_lookup+0x155/0x380 fs/jfs/namei.c:1461 lookup_open fs/namei.c:3774 [inline] open_last_lookups fs/namei.c:3895 [inline] path_openat+0x110d/0x3840 fs/namei.c:4131 do_filp_open+0x1fa/0x410 fs/namei.c:4161 do_sys_openat2+0x121/0x1c0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1463 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcd5c08efc9 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:00007fff10491598 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fcd5c2e5fa0 RCX: 00007fcd5c08efc9 RDX: 0000000000000000 RSI: 0000200000000280 RDI: ffffffffffffff9c RBP: 00007fcd5c111f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fcd5c2e5fa0 R14: 00007fcd5c2e5fa0 R15: 0000000000000004 Allocated by task 5943: kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 unpoison_slab_object mm/kasan/common.c:342 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:368 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4962 [inline] slab_alloc_node mm/slub.c:5272 [inline] kmem_cache_alloc_lru_noprof+0x188/0x6b0 mm/slub.c:5291 alloc_inode+0x6a/0x1b0 fs/inode.c:346 new_inode+0x22/0x170 fs/inode.c:1145 debugfs_get_inode fs/debugfs/inode.c:72 [inline] __debugfs_create_file+0x14d/0x4f0 fs/debugfs/inode.c:442 debugfs_create_file_short+0x3f/0x60 fs/debugfs/inode.c:480 add_common_files net/mac80211/debugfs_netdev.c:825 [inline] add_files net/mac80211/debugfs_netdev.c:945 [inline] ieee80211_debugfs_add_netdev net/mac80211/debugfs_netdev.c:1009 [inline] ieee80211_debugfs_recreate_netdev+0x3d2/0x1460 net/mac80211/debugfs_netdev.c:1033 ieee80211_if_add+0xc17/0x1390 net/mac80211/iface.c:2269 ieee80211_register_hw+0x35a5/0x40d0 net/mac80211/main.c:1608 mac80211_hwsim_new_radio+0x2efe/0x5160 drivers/net/wireless/virtual/mac80211_hwsim.c:5803 hwsim_new_radio_nl+0xf5b/0x1bd0 drivers/net/wireless/virtual/mac80211_hwsim.c:6497 genl_family_rcv_msg_doit+0x215/0x300 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x60e/0x790 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x846/0xa10 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:742 __sys_sendto+0x3c7/0x520 net/socket.c:2244 __do_sys_sendto net/socket.c:2251 [inline] __se_sys_sendto net/socket.c:2247 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2247 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 20: kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 __kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [inline] poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:234 [inline] slab_free_hook mm/slub.c:2530 [inline] slab_free mm/slub.c:6619 [inline] kmem_cache_free+0x19a/0x910 mm/slub.c:6729 rcu_do_batch kernel/rcu/tree.c:2605 [inline] rcu_core kernel/rcu/tree.c:2861 [inline] rcu_cpu_kthread+0xbf6/0x1b50 kernel/rcu/tree.c:2949 smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:160 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Last potentially related work creation: kasan_save_stack+0x3e/0x60 mm/kasan/common.c:56 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:559 __call_rcu_common kernel/rcu/tree.c:3123 [inline] call_rcu+0x157/0x9c0 kernel/rcu/tree.c:3243 destroy_inode fs/inode.c:401 [inline] evict+0x847/0x9c0 fs/inode.c:834 __dentry_kill+0x209/0x660 fs/dcache.c:669 dput+0x19f/0x2b0 fs/dcache.c:911 find_next_child+0x1e5/0x250 fs/libfs.c:600 __simple_recursive_removal+0x10b/0x510 fs/libfs.c:617 debugfs_remove+0x5b/0x70 fs/debugfs/inode.c:800 ieee80211_debugfs_remove_netdev+0x52/0xb0 net/mac80211/debugfs_netdev.c:1019 ieee80211_teardown_sdata+0x5a/0x140 net/mac80211/iface.c:859 ieee80211_if_change_type+0x14c/0x990 net/mac80211/iface.c:2007 ieee80211_change_iface+0xd5/0x510 net/mac80211/cfg.c:254 rdev_change_virtual_intf net/wireless/rdev-ops.h:74 [inline] cfg80211_change_iface+0x795/0xef0 net/wireless/util.c:1238 nl80211_set_interface+0x773/0xaa0 net/wireless/nl80211.c:4633 genl_family_rcv_msg_doit+0x215/0x300 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x60e/0x790 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x846/0xa10 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:742 __sys_sendto+0x3c7/0x520 net/socket.c:2244 __do_sys_sendto net/socket.c:2251 [inline] __se_sys_sendto net/socket.c:2247 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2247 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff8880410f8590 which belongs to the cache debugfs_inode_cache of size 1296 The buggy address is located 312 bytes inside of freed 1296-byte region [ffff8880410f8590, ffff8880410f8aa0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880410fde90 pfn:0x410f8 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0x80000000000040(head|node=0|zone=1) page_type: f5(slab) raw: 0080000000000040 ffff88801cefb640 0000000000000000 0000000000000001 raw: ffff8880410fde90 0000000000170015 00000000f5000000 0000000000000000 head: 0080000000000040 ffff88801cefb640 0000000000000000 0000000000000001 head: ffff8880410fde90 0000000000170015 00000000f5000000 0000000000000000 head: 0080000000000003 ffffea0001043e01 00000000ffffffff 00000000ffffffff head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0xd20d0(__GFP_RECLAIMABLE|__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5815, tgid 5815 (syz-executor), ts 91205558086, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1850 prep_new_page mm/page_alloc.c:1858 [inline] get_page_from_freelist+0x28c0/0x2960 mm/page_alloc.c:3884 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5183 alloc_pages_mpol+0xd1/0x380 mm/mempolicy.c:2416 alloc_slab_page mm/slub.c:3046 [inline] allocate_slab+0x96/0x3a0 mm/slub.c:3219 new_slab mm/slub.c:3273 [inline] ___slab_alloc+0xb12/0x13f0 mm/slub.c:4643 __slab_alloc+0xc6/0x1f0 mm/slub.c:4762 __slab_alloc_node mm/slub.c:4838 [inline] slab_alloc_node mm/slub.c:5260 [inline] kmem_cache_alloc_lru_noprof+0xf0/0x6b0 mm/slub.c:5291 alloc_inode+0x6a/0x1b0 fs/inode.c:346 new_inode+0x22/0x170 fs/inode.c:1145 debugfs_get_inode fs/debugfs/inode.c:72 [inline] __debugfs_create_file+0x14d/0x4f0 fs/debugfs/inode.c:442 debugfs_create_file_full+0x3f/0x60 fs/debugfs/inode.c:469 ref_tracker_dir_debugfs+0x154/0x270 lib/ref_tracker.c:441 ref_tracker_dir_init include/linux/ref_tracker.h:70 [inline] preinit_net+0x3a4/0x770 net/core/net_namespace.c:411 copy_net_ns+0x223/0x4e0 net/core/net_namespace.c:570 create_new_namespaces+0x3f3/0x720 kernel/nsproxy.c:110 page_owner free stack trace missing Memory state around the buggy address: ffff8880410f8580: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880410f8600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880410f8680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880410f8700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880410f8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================