syzkaller login: [ 30.064025] BUG: Bad rss-counter state mm:00000000f6f187e8 type:MM_FILEPAGES val:33 [ 30.065043] BUG: Bad rss-counter state mm:00000000f6f187e8 type:MM_ANONPAGES val:22 [ 30.233383] ================================================================== [ 30.234320] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.235265] Read of size 8 at addr ffff88800964edf0 by task sshd/220 [ 30.236048] [ 30.236331] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.237290] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.238271] Call Trace: [ 30.238598] [ 30.239014] dump_stack_lvl+0x91/0xf0 [ 30.239652] print_report+0xcc/0x620 [ 30.240285] ? __virt_addr_valid+0x102/0x340 [ 30.240989] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.241780] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.242578] kasan_report+0xbe/0xf0 [ 30.243191] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.244024] vma_interval_tree_remove+0xc75/0xec0 [ 30.244755] vma_prepare+0xc54/0x11a0 [ 30.245259] __split_vma+0x5af/0x950 [ 30.245761] ? __pfx___split_vma+0x10/0x10 [ 30.246322] ? find_held_lock+0x2c/0x110 [ 30.246870] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.247468] ? lock_is_held_type+0x9f/0x120 [ 30.248053] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.248711] ? mtree_range_walk+0x632/0x900 [ 30.249377] ? mas_walk+0x5c7/0x7c0 [ 30.249993] do_vmi_munmap+0x1f1/0x2b0 [ 30.250627] mmap_region+0x1f9/0x2660 [ 30.251248] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.251949] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.252889] ? __pfx_lock_acquire+0x10/0x10 [ 30.253595] ? __pfx_mmap_region+0x10/0x10 [ 30.254288] ? security_mmap_addr+0x7d/0xa0 [ 30.254990] ? get_unmapped_area+0x1f5/0x3f0 [ 30.255716] do_mmap+0x854/0xf00 [ 30.256305] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.256942] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.257685] ksys_mmap_pgoff+0x3af/0x500 [ 30.258331] do_syscall_64+0x3f/0x90 [ 30.258959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.259763] RIP: 0033:0x7f6266c36d82 [ 30.260251] 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 [ 30.262524] RSP: 002b:00007ffc82f1a068 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.263490] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6266c36d82 [ 30.264412] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6266070000 [ 30.265319] RBP: 00007f6266070000 R08: 0000000000000009 R09: 0000000000001000 [ 30.266221] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557c6b18bb20 [ 30.267129] R13: 00007ffc82f1a080 R14: 00007ffc82f1a0b0 R15: 00007ffc82f1a410 [ 30.268079] [ 30.268390] [ 30.268618] Allocated by task 213: [ 30.269078] kasan_save_stack+0x22/0x50 [ 30.269619] kasan_set_track+0x25/0x30 [ 30.270143] __kasan_slab_alloc+0x59/0x70 [ 30.270694] kmem_cache_alloc+0x16b/0x370 [ 30.271241] vm_area_dup+0x20/0x160 [ 30.271723] __split_vma+0x170/0x950 [ 30.272233] split_vma+0xc6/0x110 [ 30.272702] mprotect_fixup+0x8d2/0xb30 [ 30.273241] do_mprotect_pkey+0x87e/0xd40 [ 30.273789] __x64_sys_mprotect+0x78/0xc0 [ 30.274346] do_syscall_64+0x3f/0x90 [ 30.274848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.275545] [ 30.275785] Freed by task 203: [ 30.276202] kasan_save_stack+0x22/0x50 [ 30.276745] kasan_set_track+0x25/0x30 [ 30.277273] kasan_save_free_info+0x2b/0x50 [ 30.277883] __kasan_slab_free+0x10a/0x190 [ 30.278448] kmem_cache_free+0x10d/0x4d0 [ 30.278992] rcu_core+0x8c8/0x2860 [ 30.279460] __do_softirq+0x1b7/0x7d4 [ 30.279974] [ 30.280209] Last potentially related work creation: [ 30.280840] kasan_save_stack+0x22/0x50 [ 30.281382] __kasan_record_aux_stack+0x8e/0xa0 [ 30.281990] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.282673] remove_vma+0x139/0x170 [ 30.283153] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.283752] do_vmi_munmap+0x1f1/0x2b0 [ 30.284273] __vm_munmap+0x138/0x3a0 [ 30.284766] __x64_sys_munmap+0x59/0x80 [ 30.285293] do_syscall_64+0x3f/0x90 [ 30.285797] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.286492] [ 30.286723] The buggy address belongs to the object at ffff88800964ed98 [ 30.286723] which belongs to the cache vm_area_struct of size 168 [ 30.288303] The buggy address is located 88 bytes inside of [ 30.288303] freed 168-byte region [ffff88800964ed98, ffff88800964ee40) [ 30.289783] [ 30.290014] The buggy address belongs to the physical page: [ 30.290729] page:000000005b0a6ca2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x964e [ 30.291899] memcg:ffff888014755901 [ 30.292354] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.293035] page_type: 0xffffffff() [ 30.293514] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.294480] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014755901 [ 30.295454] page dumped because: kasan: bad access detected [ 30.296193] [ 30.296423] Memory state around the buggy address: [ 30.297046] ffff88800964ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.297952] ffff88800964ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.298881] >ffff88800964ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.299801] ^ [ 30.300656] ffff88800964ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.301572] ffff88800964ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.302484] ================================================================== [ 30.303539] Disabling lock debugging due to kernel taint [ 32.189046] BUG: Bad rss-counter state mm:000000009ce6d7c8 type:MM_FILEPAGES val:33 [ 32.189949] BUG: Bad rss-counter state mm:000000009ce6d7c8 type:MM_ANONPAGES val:22 [ 32.627787] BUG: Bad rss-counter state mm:000000009871bdfd type:MM_FILEPAGES val:33 [ 32.629064] BUG: Bad rss-counter state mm:000000009871bdfd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33309' (ECDSA) to the list of known hosts. 2023/06/21 06:08:52 fuzzer started 2023/06/21 06:08:52 dialing manager at localhost:36067 2023/06/21 06:08:52 checking machine... 2023/06/21 06:08:52 checking revisions... [ 33.361243] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:08:52 testing simple program... [ 33.411375] cgroup: Unknown subsys name 'net' [ 33.461667] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:08:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff863b4448 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801476f5a0 RSP=ffff88801476f4d8 R8 =ffffffff863b444c R9 =ffff88801476f588 R10=0000000000038001 R11=000000000008abe0 R12=ffff88801476f5a8 R13=ffff88801476f590 R14=ffff88801476f589 R15=ffff88801476f548 RIP=ffffffff81130b06 RFL=00000297 [--S-APC] 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 00007f88334b3900 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=00007f88328ea5e0 CR3=000000001017e000 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=00000000000000000000000000000000 XMM01=164eeebcc2186e9ae54d42395df68e5c XMM02=000000000011a198d59e07bde36eea69 XMM03=000000000011a2c0ec2efd57dc4c00df XMM04=7eb1a9e83fa1274a00000000000ae988 XMM05=6c7ffde345f2917b0000000000132b30 XMM06=19e9129bd510f23500000000001319e8 XMM07=fb795ef6d65770560000000000121b68 XMM08=2c67c8bc2e329bc3000000000011a2c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff1100393ee85 RCX=0000000000000002 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88801c9f7418 R8 =0000000000000000 R9 =0000000000000000 R10=00000000000000b3 R11=000008f7000008f7 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8f06 RFL=00000256 [---ZAP-] 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 00007fb9cf177900 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=00007fff2e974000 CR3=000000000f3de000 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