EXT4-fs warning (device loop1): ext4_multi_mount_protect:328: MMP startup interrupted, failing mount EXT4-fs warning (device loop0): ext4_multi_mount_protect:328: MMP startup interrupted, failing mount ================================================================== BUG: KASAN: use-after-free in perf_trace_lock_acquire+0x3fe/0x530 Read of size 8 at addr ffff888018a6f7d0 by task syz-executor/9738 CPU: 1 PID: 9738 Comm: syz-executor Not tainted 5.19.0-rc7-next-20220721 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 Call Trace: dump_stack_lvl+0x8b/0xb3 print_report.cold+0x5e/0x5e5 kasan_report+0xb1/0x1c0 perf_trace_lock_acquire+0x3fe/0x530 lock_acquire+0x413/0x530 _raw_spin_lock_irq+0x32/0x50 kmemleak_scan+0x21d/0x16f0 kmemleak_write+0x570/0x680 full_proxy_write+0x11d/0x190 vfs_write+0x2cb/0xd90 ksys_write+0x127/0x250 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7facce7035c3 Code: 16 00 00 00 eb ae 90 b8 6e 00 00 00 eb a6 e8 44 ef 04 00 0f 1f 40 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 18 RSP: 002b:00007ffda61ef248 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ffda61ef888 RCX: 00007facce7035c3 RDX: 0000000000000004 RSI: 00007facce7b9ed9 RDI: 0000000000000003 RBP: 0000000000000003 R08: 000000000000059b R09: 00007ffda61fa080 R10: 00007ffda61fa090 R11: 0000000000000246 R12: 00007facce705b10 R13: 00007ffda61f0ee3 R14: 0000000000000000 R15: 000000000015e59d Allocated by task 9691: kasan_save_stack+0x1e/0x40 __kasan_slab_alloc+0x66/0x80 kmem_cache_alloc+0x1b1/0x4a0 __create_object.isra.0+0x3d/0xc10 __kmalloc_track_caller+0x275/0x450 kmemdup+0x23/0x50 shmem_symlink+0x185/0x7f0 vfs_symlink+0x364/0x5b0 do_symlinkat+0x144/0x2a0 __x64_sys_symlink+0x75/0x90 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 9736: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 kasan_set_free_info+0x20/0x40 __kasan_slab_free+0x108/0x190 kmem_cache_free+0xfb/0x610 rcu_core+0x7e2/0x2080 __do_softirq+0x1c8/0x8d0 Last potentially related work creation: kasan_save_stack+0x1e/0x40 __kasan_record_aux_stack+0x97/0xb0 call_rcu+0x6a/0xa30 kfree+0xbb/0x5e0 shmem_free_in_core_inode+0x8b/0xa0 i_callback+0x42/0x70 rcu_core+0x7e2/0x2080 __do_softirq+0x1c8/0x8d0 Second to last potentially related work creation: kasan_save_stack+0x1e/0x40 __kasan_record_aux_stack+0x97/0xb0 call_rcu+0x6a/0xa30 kfree+0xbb/0x5e0 skb_release_data+0x6d8/0x810 consume_skb+0xc2/0x160 mac80211_hwsim_tx_frame+0x1f6/0x2a0 mac80211_hwsim_beacon_tx+0x562/0xaa0 __iterate_interfaces+0x2d3/0x560 ieee80211_iterate_active_interfaces_atomic+0x70/0x180 mac80211_hwsim_beacon+0x101/0x200 __hrtimer_run_queues+0x5de/0xbd0 hrtimer_run_softirq+0x172/0x340 __do_softirq+0x1c8/0x8d0 The buggy address belongs to the object at ffff888018a6f7a0 which belongs to the cache kmemleak_object of size 368 The buggy address is located 48 bytes inside of 368-byte region [ffff888018a6f7a0, ffff888018a6f910) The buggy address belongs to the physical page: page:00000000e9741c60 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18a6e head:00000000e9741c60 order:1 compound_mapcount:0 compound_pincount:0 flags: 0x100000000010200(slab|head|node=0|zone=1) raw: 0100000000010200 0000000000000000 dead000000000001 ffff888007c4f780 raw: 0000000000000000 0000000000120012 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888018a6f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888018a6f700: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc >ffff888018a6f780: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb ^ ffff888018a6f800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888018a6f880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================