syzkaller login: [ 53.095351] BUG: Bad rss-counter state mm:00000000c9fc1bba type:MM_FILEPAGES val:33 [ 53.096629] BUG: Bad rss-counter state mm:00000000c9fc1bba type:MM_ANONPAGES val:22 [ 53.132592] ================================================================== [ 53.133717] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 53.134919] Read of size 8 at addr ffff88801a0af310 by task sshd/220 [ 53.135847] [ 53.136081] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 53.137124] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 53.138225] Call Trace: [ 53.138648] [ 53.138999] dump_stack_lvl+0x91/0xf0 [ 53.139534] print_report+0xcc/0x620 [ 53.140055] ? __virt_addr_valid+0x102/0x340 [ 53.140639] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.141295] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.141969] kasan_report+0xbe/0xf0 [ 53.142468] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.143122] vma_interval_tree_remove+0xc75/0xec0 [ 53.143761] vma_prepare+0xc54/0x11a0 [ 53.144275] __split_vma+0x5af/0x950 [ 53.144786] ? __pfx___split_vma+0x10/0x10 [ 53.145344] ? find_held_lock+0x2c/0x110 [ 53.146054] do_vmi_align_munmap+0x2ba/0x11f0 [ 53.146670] ? lock_is_held_type+0x9f/0x120 [ 53.147237] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 53.147865] ? mtree_range_walk+0x632/0x900 [ 53.148444] ? mas_walk+0x5c7/0x7c0 [ 53.148929] do_vmi_munmap+0x1f1/0x2b0 [ 53.149435] mmap_region+0x1f9/0x2660 [ 53.149966] ? vm_mmap_pgoff+0x15c/0x3a0 [ 53.150491] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 53.151242] ? __pfx_lock_acquire+0x10/0x10 [ 53.151792] ? __pfx_mmap_region+0x10/0x10 [ 53.152344] ? security_mmap_addr+0x7d/0xa0 [ 53.152887] ? get_unmapped_area+0x1f5/0x3f0 [ 53.153450] do_mmap+0x854/0xf00 [ 53.153912] vm_mmap_pgoff+0x1a6/0x3a0 [ 53.154437] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 53.155014] ksys_mmap_pgoff+0x3af/0x500 [ 53.155534] do_syscall_64+0x3f/0x90 [ 53.156023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.156684] RIP: 0033:0x7f346608dd82 [ 53.157168] 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 [ 53.159374] RSP: 002b:00007ffd6dd49ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 53.160313] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f346608dd82 [ 53.161370] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f34654c7000 [ 53.162252] RBP: 00007f34654c7000 R08: 0000000000000009 R09: 0000000000001000 [ 53.163151] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560324febec0 [ 53.164041] R13: 00007ffd6dd4a010 R14: 00007ffd6dd4a040 R15: 00007ffd6dd4a3a0 [ 53.164945] [ 53.165247] [ 53.165476] Allocated by task 213: [ 53.165940] kasan_save_stack+0x22/0x50 [ 53.166462] kasan_set_track+0x25/0x30 [ 53.166979] __kasan_slab_alloc+0x59/0x70 [ 53.167515] kmem_cache_alloc+0x16b/0x370 [ 53.168051] vm_area_dup+0x20/0x160 [ 53.168520] __split_vma+0x170/0x950 [ 53.169005] split_vma+0xc6/0x110 [ 53.169471] mprotect_fixup+0x8d2/0xb30 [ 53.170000] do_mprotect_pkey+0x87e/0xd40 [ 53.170546] __x64_sys_mprotect+0x78/0xc0 [ 53.171095] do_syscall_64+0x3f/0x90 [ 53.171588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.172267] [ 53.172487] Freed by task 213: [ 53.172902] kasan_save_stack+0x22/0x50 [ 53.173424] kasan_set_track+0x25/0x30 [ 53.173950] kasan_save_free_info+0x2b/0x50 [ 53.174500] __kasan_slab_free+0x10a/0x190 [ 53.175067] kmem_cache_free+0x10d/0x4d0 [ 53.175589] rcu_core+0x8c8/0x2860 [ 53.176060] __do_softirq+0x1b7/0x7d4 [ 53.176549] [ 53.176778] Last potentially related work creation: [ 53.177380] kasan_save_stack+0x22/0x50 [ 53.177911] __kasan_record_aux_stack+0x8e/0xa0 [ 53.178501] __call_rcu_common.constprop.0+0x6a/0xb90 [ 53.179172] remove_vma+0x139/0x170 [ 53.179647] do_vmi_align_munmap+0xd4a/0x11f0 [ 53.180222] do_vmi_munmap+0x1f1/0x2b0 [ 53.180729] __vm_munmap+0x138/0x3a0 [ 53.181213] __x64_sys_munmap+0x59/0x80 [ 53.181752] do_syscall_64+0x3f/0x90 [ 53.182247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.182925] [ 53.183144] The buggy address belongs to the object at ffff88801a0af2b8 [ 53.183144] which belongs to the cache vm_area_struct of size 168 [ 53.184691] The buggy address is located 88 bytes inside of [ 53.184691] freed 168-byte region [ffff88801a0af2b8, ffff88801a0af360) [ 53.186184] [ 53.186404] The buggy address belongs to the physical page: [ 53.187087] page:00000000af0e19c4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0af [ 53.188231] memcg:ffff8880098ad101 [ 53.188673] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 53.189390] page_type: 0xffffffff() [ 53.189866] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 53.190819] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880098ad101 [ 53.191763] page dumped because: kasan: bad access detected [ 53.192452] [ 53.192674] Memory state around the buggy address: [ 53.193278] ffff88801a0af200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 53.194165] ffff88801a0af280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 53.195064] >ffff88801a0af300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 53.195955] ^ [ 53.196448] ffff88801a0af380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 53.197334] ffff88801a0af400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 53.198246] ================================================================== [ 53.199263] Disabling lock debugging due to kernel taint [ 55.288470] BUG: Bad rss-counter state mm:000000002116be39 type:MM_FILEPAGES val:33 [ 55.289583] BUG: Bad rss-counter state mm:000000002116be39 type:MM_ANONPAGES val:22 [ 55.884275] BUG: Bad rss-counter state mm:00000000aeef0e60 type:MM_FILEPAGES val:33 [ 55.885363] BUG: Bad rss-counter state mm:00000000aeef0e60 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25473' (ECDSA) to the list of known hosts. 2023/06/20 02:29:34 fuzzer started 2023/06/20 02:29:35 dialing manager at localhost:44161 2023/06/20 02:29:35 checking machine... 2023/06/20 02:29:35 checking revisions... [ 56.527808] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:29:35 testing simple program... [ 56.580633] cgroup: Unknown subsys name 'net' [ 56.626469] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:29:12 Registers: info registers vcpu 0 RAX=ffffffff8118ddb5 RBX=ffffffff85d978a4 RCX=ffffffff8118ddc2 RDX=0000000000000000 RSI=ffffffff8609fada RDI=ffffffff85d97888 RBP=ffffffff85d9789c RSP=ffff88806ce099e0 R8 =ffffffff8609fada R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffffffff85d978ac R13=ffffffff85d97888 R14=ffffffff85d97898 R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000212 [----A--] 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 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=00007f36ca3811e0 CR3=000000000eb88000 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=fe6cf15d612e7e84024406121e72c51b XMM02=000000000011fb38ec2efd57dc4c00df XMM03=0000000000124200c238fa0ba63acc4e XMM04=fcc0e7e2c8ad355a00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133d90 XMM06=baf21e81a9dfd45b0000000000132bf8 XMM07=e042d86d42eb936e0000000000124480 XMM08=c238fa0ba63acc4e000000000011fb98 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000020 RBX=0000000000000000 RCX=0000000000000008 RDX=00007efef9c189a8 RSI=00007fff9ad0cca8 RDI=00007efef9c189a8 RBP=00007fff9ad0cce0 RSP=00007fff9ad0c788 R8 =00000000ffffffff R9 =0000000000000004 R10=00007efef9c189a8 R11=0000000000000000 R12=00007fff9ad0ccf0 R13=00007efef9c18985 R14=00007fff9ad0ce30 R15=0000000000000073 RIP=00007efef963caf3 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efef90e9900 00000000 00000000 GS =0000 0000000000000000 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=00007efef96a10b0 CR3=00000000090c6000 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=0000000000ff00ff00ff00ff00000000 XMM02=0000000000ff00000000000000000000 XMM03=00006f730078756e696c65735f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=7469647561007325732573253a4d4150 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000