syzkaller login: [ 28.686355] BUG: Bad rss-counter state mm:00000000acc2add8 type:MM_FILEPAGES val:33 [ 28.687564] BUG: Bad rss-counter state mm:00000000acc2add8 type:MM_ANONPAGES val:22 [ 28.824981] ================================================================== [ 28.825856] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.826786] Read of size 8 at addr ffff88800f61a968 by task sshd/222 [ 28.827550] [ 28.827872] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.828733] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.829707] Call Trace: [ 28.830041] [ 28.830325] dump_stack_lvl+0x91/0xf0 [ 28.830809] print_report+0xcc/0x620 [ 28.831290] ? __virt_addr_valid+0x102/0x340 [ 28.831872] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.832483] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.833094] kasan_report+0xbe/0xf0 [ 28.833560] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.834181] vma_interval_tree_remove+0xc75/0xec0 [ 28.834777] vma_prepare+0xc54/0x11a0 [ 28.835254] __split_vma+0x5af/0x950 [ 28.835728] ? __pfx___split_vma+0x10/0x10 [ 28.836253] ? find_held_lock+0x2c/0x110 [ 28.836774] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.837338] ? lock_is_held_type+0x9f/0x120 [ 28.837890] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.838495] ? mtree_range_walk+0x632/0x900 [ 28.839041] ? mas_walk+0x5c7/0x7c0 [ 28.839526] do_vmi_munmap+0x1f1/0x2b0 [ 28.840019] mmap_region+0x1f9/0x2660 [ 28.840509] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.841019] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.841731] ? __pfx_lock_acquire+0x10/0x10 [ 28.842266] ? __pfx_mmap_region+0x10/0x10 [ 28.842790] ? security_mmap_addr+0x7d/0xa0 [ 28.843336] ? get_unmapped_area+0x1f5/0x3f0 [ 28.843894] do_mmap+0x854/0xf00 [ 28.844332] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.844829] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.845393] ksys_mmap_pgoff+0x3af/0x500 [ 28.845910] do_syscall_64+0x3f/0x90 [ 28.846397] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.847041] RIP: 0033:0x7f18b74fad82 [ 28.847509] 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 [ 28.849632] RSP: 002b:00007ffc9d887f48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.850539] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f18b74fad82 [ 28.851395] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f18b6934000 [ 28.852250] RBP: 00007f18b6934000 R08: 0000000000000009 R09: 0000000000001000 [ 28.853087] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f1f40e9f70 [ 28.853931] R13: 00007ffc9d887f60 R14: 00007ffc9d887f90 R15: 00007ffc9d8882f0 [ 28.854787] [ 28.855082] [ 28.855296] Allocated by task 215: [ 28.855744] kasan_save_stack+0x22/0x50 [ 28.856250] kasan_set_track+0x25/0x30 [ 28.856743] __kasan_slab_alloc+0x59/0x70 [ 28.857261] kmem_cache_alloc+0x16b/0x370 [ 28.857778] vm_area_dup+0x20/0x160 [ 28.858233] __split_vma+0x170/0x950 [ 28.858698] split_vma+0xc6/0x110 [ 28.859134] mprotect_fixup+0x8d2/0xb30 [ 28.859640] do_mprotect_pkey+0x87e/0xd40 [ 28.860156] __x64_sys_mprotect+0x78/0xc0 [ 28.860676] do_syscall_64+0x3f/0x90 [ 28.861148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.861790] [ 28.862003] Freed by task 215: [ 28.862395] kasan_save_stack+0x22/0x50 [ 28.862895] kasan_set_track+0x25/0x30 [ 28.863400] kasan_save_free_info+0x2b/0x50 [ 28.863940] __kasan_slab_free+0x10a/0x190 [ 28.864471] kmem_cache_free+0x10d/0x4d0 [ 28.864978] rcu_core+0x8c8/0x2860 [ 28.865421] __do_softirq+0x1b7/0x7d4 [ 28.865895] [ 28.866108] Last potentially related work creation: [ 28.866694] kasan_save_stack+0x22/0x50 [ 28.867194] __kasan_record_aux_stack+0x8e/0xa0 [ 28.867781] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.868425] remove_vma+0x139/0x170 [ 28.868870] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.869429] do_vmi_munmap+0x1f1/0x2b0 [ 28.869909] __vm_munmap+0x138/0x3a0 [ 28.870375] __x64_sys_munmap+0x59/0x80 [ 28.870868] do_syscall_64+0x3f/0x90 [ 28.871353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.872006] [ 28.872219] The buggy address belongs to the object at ffff88800f61a910 [ 28.872219] which belongs to the cache vm_area_struct of size 168 [ 28.873682] The buggy address is located 88 bytes inside of [ 28.873682] freed 168-byte region [ffff88800f61a910, ffff88800f61a9b8) [ 28.875082] [ 28.875299] The buggy address belongs to the physical page: [ 28.875969] page:0000000024bce1ff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf61a [ 28.877047] memcg:ffff88800ea26101 [ 28.877469] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.878105] page_type: 0xffffffff() [ 28.878551] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.879477] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea26101 [ 28.880381] page dumped because: kasan: bad access detected [ 28.881036] [ 28.881255] Memory state around the buggy address: [ 28.881832] ffff88800f61a800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 28.882683] ffff88800f61a880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 28.883550] >ffff88800f61a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.884402] ^ [ 28.885176] ffff88800f61a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 28.886026] ffff88800f61aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.886871] ================================================================== [ 28.887845] Disabling lock debugging due to kernel taint [ 31.212088] BUG: Bad rss-counter state mm:000000006e41972a type:MM_FILEPAGES val:33 [ 31.213309] BUG: Bad rss-counter state mm:000000006e41972a type:MM_ANONPAGES val:22 [ 31.706098] BUG: Bad rss-counter state mm:00000000feb9f547 type:MM_FILEPAGES val:33 [ 31.707537] BUG: Bad rss-counter state mm:00000000feb9f547 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29801' (ECDSA) to the list of known hosts. 2023/06/20 18:54:15 fuzzer started 2023/06/20 18:54:15 dialing manager at localhost:36067 2023/06/20 18:54:15 checking machine... 2023/06/20 18:54:15 checking revisions... [ 32.439209] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:54:15 testing simple program... [ 32.492735] cgroup: Unknown subsys name 'net' [ 32.533078] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:54:15 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff8364e0a1 RDX=0000000000000001 RSI=ffffffff863b5cfc RDI=ffffffff85fa69bc RBP=ffff88800d9272e0 RSP=ffff88800d9271d0 R8 =ffffffff863b5cfc R9 =ffff88800d9272c8 R10=0000000000038001 R11=000000000008affe R12=ffffffff85fa69bc R13=ffff88800d9272d0 R14=ffff88800d9272c9 R15=ffff88800d927288 RIP=ffffffff8112fc27 RFL=00000202 [-------] 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 00007fde35067900 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=00007fde34473fd0 CR3=000000000ca6e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=cdf83208dbbabc9600000000000ae988 XMM05=5c7cef9de479dfce0000000000132518 XMM06=00c3ffa147b8d8570000000000131308 XMM07=fb795ef6d65770560000000000121598 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff110028fcf40 RSI=ffffffff8180c705 RDI=ffff8880147e7a70 RBP=ffff8880147e7a40 RSP=ffff8880147e7998 R8 =ffffffff86138e90 R9 =ffff8880147e79e8 R10=0000000000038001 R11=0000000000020d8f R12=ffff8880147e7a70 R13=0000000000000000 R14=ffff888016dad1c0 R15=0000000000000cc0 RIP=ffffffff813ad47f RFL=00000286 [--S--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 00007fa0714aa900 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=00007ffff85be000 CR3=000000000e9fe000 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