syzkaller login: [ 73.714723] BUG: Bad rss-counter state mm:00000000ef864810 type:MM_FILEPAGES val:33 [ 73.716069] BUG: Bad rss-counter state mm:00000000ef864810 type:MM_ANONPAGES val:22 [ 73.875856] ================================================================== [ 73.876792] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 73.877754] Read of size 8 at addr ffff88800f79b4e0 by task sshd/220 [ 73.878660] [ 73.878887] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 73.879935] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 73.880949] Call Trace: [ 73.881286] [ 73.881577] dump_stack_lvl+0x91/0xf0 [ 73.882094] print_report+0xcc/0x620 [ 73.882612] ? __virt_addr_valid+0x102/0x340 [ 73.883184] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.883849] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.884486] kasan_report+0xbe/0xf0 [ 73.884985] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.885614] vma_interval_tree_remove+0xc75/0xec0 [ 73.886221] vma_prepare+0xc54/0x11a0 [ 73.886721] __split_vma+0x5af/0x950 [ 73.887208] ? __pfx___split_vma+0x10/0x10 [ 73.887782] ? find_held_lock+0x2c/0x110 [ 73.888310] do_vmi_align_munmap+0x2ba/0x11f0 [ 73.888886] ? lock_is_held_type+0x9f/0x120 [ 73.889439] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 73.890068] ? mtree_range_walk+0x632/0x900 [ 73.890647] ? mas_walk+0x5c7/0x7c0 [ 73.891138] do_vmi_munmap+0x1f1/0x2b0 [ 73.891653] mmap_region+0x1f9/0x2660 [ 73.892149] ? vm_mmap_pgoff+0x15c/0x3a0 [ 73.892674] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 73.893401] ? __pfx_lock_acquire+0x10/0x10 [ 73.893939] ? __pfx_mmap_region+0x10/0x10 [ 73.894492] ? security_mmap_addr+0x7d/0xa0 [ 73.895031] ? get_unmapped_area+0x1f5/0x3f0 [ 73.895603] do_mmap+0x854/0xf00 [ 73.896047] vm_mmap_pgoff+0x1a6/0x3a0 [ 73.896549] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 73.897116] ksys_mmap_pgoff+0x3af/0x500 [ 73.897636] do_syscall_64+0x3f/0x90 [ 73.898126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.898784] RIP: 0033:0x7fa2ea8acd82 [ 73.899242] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 73.901394] RSP: 002b:00007fff526f3848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 73.902306] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa2ea8acd82 [ 73.903160] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa2e9ce6000 [ 73.904020] RBP: 00007fa2e9ce6000 R08: 0000000000000009 R09: 0000000000001000 [ 73.904879] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f371f22f70 [ 73.905729] R13: 00007fff526f3860 R14: 00007fff526f3890 R15: 00007fff526f3bf0 [ 73.906596] [ 73.906898] [ 73.907116] Allocated by task 213: [ 73.907567] kasan_save_stack+0x22/0x50 [ 73.908080] kasan_set_track+0x25/0x30 [ 73.908582] __kasan_slab_alloc+0x59/0x70 [ 73.909107] kmem_cache_alloc+0x16b/0x370 [ 73.909623] vm_area_dup+0x20/0x160 [ 73.910081] __split_vma+0x170/0x950 [ 73.910560] split_vma+0xc6/0x110 [ 73.911006] mprotect_fixup+0x8d2/0xb30 [ 73.911508] do_mprotect_pkey+0x87e/0xd40 [ 73.912044] __x64_sys_mprotect+0x78/0xc0 [ 73.912572] do_syscall_64+0x3f/0x90 [ 73.913047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.913702] [ 73.913918] Freed by task 203: [ 73.914323] kasan_save_stack+0x22/0x50 [ 73.914831] kasan_set_track+0x25/0x30 [ 73.915339] kasan_save_free_info+0x2b/0x50 [ 73.915883] __kasan_slab_free+0x10a/0x190 [ 73.916417] kmem_cache_free+0x10d/0x4d0 [ 73.916933] rcu_core+0x8c8/0x2860 [ 73.917404] __do_softirq+0x1b7/0x7d4 [ 73.917884] [ 73.918104] Last potentially related work creation: [ 73.918695] kasan_save_stack+0x22/0x50 [ 73.919205] __kasan_record_aux_stack+0x8e/0xa0 [ 73.919901] __call_rcu_common.constprop.0+0x6a/0xb90 [ 73.920552] remove_vma+0x139/0x170 [ 73.921005] do_vmi_align_munmap+0xd4a/0x11f0 [ 73.921579] do_vmi_munmap+0x1f1/0x2b0 [ 73.922066] __vm_munmap+0x138/0x3a0 [ 73.922542] __x64_sys_munmap+0x59/0x80 [ 73.923045] do_syscall_64+0x3f/0x90 [ 73.923531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.924204] [ 73.924426] The buggy address belongs to the object at ffff88800f79b488 [ 73.924426] which belongs to the cache vm_area_struct of size 168 [ 73.925898] The buggy address is located 88 bytes inside of [ 73.925898] freed 168-byte region [ffff88800f79b488, ffff88800f79b530) [ 73.927316] [ 73.927531] The buggy address belongs to the physical page: [ 73.928221] page:00000000e85a1d72 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf79b [ 73.929308] memcg:ffff888010294001 [ 73.929743] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 73.930447] page_type: 0xffffffff() [ 73.930903] raw: 0100000000000200 ffff88800879fc80 ffffea00005bdf40 dead000000000007 [ 73.931833] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010294001 [ 73.932747] page dumped because: kasan: bad access detected [ 73.933415] [ 73.933632] Memory state around the buggy address: [ 73.934211] ffff88800f79b380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 73.935071] ffff88800f79b400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 73.935955] >ffff88800f79b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.936825] ^ [ 73.937631] ffff88800f79b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 73.938511] ffff88800f79b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.939375] ================================================================== [ 73.940400] Disabling lock debugging due to kernel taint [ 76.797672] BUG: Bad rss-counter state mm:00000000d6c2fe8b type:MM_FILEPAGES val:33 [ 76.798631] BUG: Bad rss-counter state mm:00000000d6c2fe8b type:MM_ANONPAGES val:22 [ 77.385566] BUG: Bad rss-counter state mm:00000000e072f0a4 type:MM_FILEPAGES val:33 [ 77.386742] BUG: Bad rss-counter state mm:00000000e072f0a4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49760' (ECDSA) to the list of known hosts. 2023/06/19 16:56:26 fuzzer started 2023/06/19 16:56:26 dialing manager at localhost:44161 2023/06/19 16:56:26 checking machine... 2023/06/19 16:56:26 checking revisions... [ 78.045295] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:56:26 testing simple program... [ 78.088841] cgroup: Unknown subsys name 'net' [ 78.127270] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:55:42 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f12de4473c0 CR3=000000000c490000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2036323a36353a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a36353a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000138 RBX=ffff888008ecb2c8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888008ecb300 RBP=ffff888018d72468 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff888018d72468 R14=ffffffff813782a8 R15=ffff88800f18a980 RIP=ffffffff8184638b RFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efdda484900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fffafbf0000 CR3=00000000167d2000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000