syzkaller login: [ 30.581204] BUG: Bad rss-counter state mm:000000009a6f0497 type:MM_FILEPAGES val:33 [ 30.582953] BUG: Bad rss-counter state mm:000000009a6f0497 type:MM_ANONPAGES val:22 [ 30.742885] ================================================================== [ 30.743952] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.744919] Read of size 8 at addr ffff88801a2f0a50 by task sshd/220 [ 30.745730] [ 30.745938] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.746748] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.747684] Call Trace: [ 30.747989] [ 30.748264] dump_stack_lvl+0x91/0xf0 [ 30.748729] print_report+0xcc/0x620 [ 30.749188] ? __virt_addr_valid+0x102/0x340 [ 30.749710] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.750287] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.750873] kasan_report+0xbe/0xf0 [ 30.751324] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.751921] vma_interval_tree_remove+0xc75/0xec0 [ 30.752491] vma_prepare+0xc54/0x11a0 [ 30.752969] __split_vma+0x5af/0x950 [ 30.753440] ? __pfx___split_vma+0x10/0x10 [ 30.753969] ? find_held_lock+0x2c/0x110 [ 30.754486] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.755042] ? lock_is_held_type+0x9f/0x120 [ 30.755582] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.756208] ? mtree_range_walk+0x632/0x900 [ 30.756755] ? mas_walk+0x5c7/0x7c0 [ 30.757222] do_vmi_munmap+0x1f1/0x2b0 [ 30.757713] mmap_region+0x1f9/0x2660 [ 30.758194] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.758690] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.759405] ? __pfx_lock_acquire+0x10/0x10 [ 30.759925] ? __pfx_mmap_region+0x10/0x10 [ 30.760430] ? security_mmap_addr+0x7d/0xa0 [ 30.760930] ? get_unmapped_area+0x1f5/0x3f0 [ 30.761448] do_mmap+0x854/0xf00 [ 30.761867] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.762341] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.762869] ksys_mmap_pgoff+0x3af/0x500 [ 30.763352] do_syscall_64+0x3f/0x90 [ 30.763813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.764424] RIP: 0033:0x7f81c1007d82 [ 30.764854] 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 [ 30.766846] RSP: 002b:00007ffd07891fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.767713] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f81c1007d82 [ 30.768518] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f81c0441000 [ 30.769309] RBP: 00007f81c0441000 R08: 0000000000000009 R09: 0000000000001000 [ 30.770149] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559ddd647ec0 [ 30.770986] R13: 00007ffd07891fd0 R14: 00007ffd07892000 R15: 00007ffd07892360 [ 30.771825] [ 30.772116] [ 30.772334] Allocated by task 213: [ 30.772754] kasan_save_stack+0x22/0x50 [ 30.773252] kasan_set_track+0x25/0x30 [ 30.773742] __kasan_slab_alloc+0x59/0x70 [ 30.774261] kmem_cache_alloc+0x16b/0x370 [ 30.774766] vm_area_dup+0x20/0x160 [ 30.775217] __split_vma+0x170/0x950 [ 30.775672] split_vma+0xc6/0x110 [ 30.776103] mprotect_fixup+0x8d2/0xb30 [ 30.776601] do_mprotect_pkey+0x87e/0xd40 [ 30.777108] __x64_sys_mprotect+0x78/0xc0 [ 30.777621] do_syscall_64+0x3f/0x90 [ 30.778090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.778722] [ 30.778939] Freed by task 210: [ 30.779324] kasan_save_stack+0x22/0x50 [ 30.779833] kasan_set_track+0x25/0x30 [ 30.780317] kasan_save_free_info+0x2b/0x50 [ 30.780837] __kasan_slab_free+0x10a/0x190 [ 30.781356] kmem_cache_free+0x10d/0x4d0 [ 30.781866] rcu_core+0x8c8/0x2860 [ 30.782312] __do_softirq+0x1b7/0x7d4 [ 30.782787] [ 30.783007] Last potentially related work creation: [ 30.783583] kasan_save_stack+0x22/0x50 [ 30.784096] __kasan_record_aux_stack+0x8e/0xa0 [ 30.784662] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.785335] remove_vma+0x139/0x170 [ 30.785829] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.786398] do_vmi_munmap+0x1f1/0x2b0 [ 30.786871] __vm_munmap+0x138/0x3a0 [ 30.787337] __x64_sys_munmap+0x59/0x80 [ 30.787839] do_syscall_64+0x3f/0x90 [ 30.788305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.788939] [ 30.789148] The buggy address belongs to the object at ffff88801a2f09f8 [ 30.789148] which belongs to the cache vm_area_struct of size 168 [ 30.790587] The buggy address is located 88 bytes inside of [ 30.790587] freed 168-byte region [ffff88801a2f09f8, ffff88801a2f0aa0) [ 30.791980] [ 30.792199] The buggy address belongs to the physical page: [ 30.792846] page:00000000638432c7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2f0 [ 30.793920] memcg:ffff88801a153b01 [ 30.794343] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.794977] page_type: 0xffffffff() [ 30.795416] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.796342] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a153b01 [ 30.797235] page dumped because: kasan: bad access detected [ 30.797891] [ 30.798103] Memory state around the buggy address: [ 30.798680] ffff88801a2f0900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.799512] ffff88801a2f0980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.800355] >ffff88801a2f0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.801186] ^ [ 30.801872] ffff88801a2f0a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.802697] ffff88801a2f0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.803524] ================================================================== [ 30.804583] Disabling lock debugging due to kernel taint [ 32.562197] BUG: Bad rss-counter state mm:00000000a7bfea85 type:MM_FILEPAGES val:33 [ 32.563769] BUG: Bad rss-counter state mm:00000000a7bfea85 type:MM_ANONPAGES val:22 [ 33.051268] BUG: Bad rss-counter state mm:00000000edf57509 type:MM_FILEPAGES val:33 [ 33.052521] BUG: Bad rss-counter state mm:00000000edf57509 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39243' (ECDSA) to the list of known hosts. 2023/06/21 07:19:12 fuzzer started 2023/06/21 07:19:13 dialing manager at localhost:36067 2023/06/21 07:19:13 checking machine... 2023/06/21 07:19:13 checking revisions... [ 33.774689] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:19:13 testing simple program... [ 33.820536] cgroup: Unknown subsys name 'net' [ 33.870487] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:19:12 Registers: info registers vcpu 0 RAX=1ffff110033d2e56 RBX=0000000000000004 RCX=0000000000000001 RDX=0000000000092cc0 RSI=0000000000000012 RDI=ffff888019e972b0 RBP=dffffc0000000000 RSP=ffff888019e97200 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000012 R13=0000000000092cc0 R14=ffff888019e97290 R15=0000000000092cc0 RIP=ffffffff813ad61a RFL=00000246 [---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 00007fda53530900 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=00007fda53ae7618 CR3=000000000fe80000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ff109d0fc40 CR3=000000000c9cc000 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=4aaf81f2063afca5624ebfe3aae8e720 XMM02=000000000011dbb0ec2efd57dc4c00df XMM03=0000000000122278fcb4a4abb4a3254e XMM04=a07638ba82d363d400000000000ae988 XMM05=19e9129bd510f23500000000001320f0 XMM06=d0850117c42a910f0000000000130f58 XMM07=e042d86d42eb936e00000000001224f8 XMM08=fcb4a4abb4a3254e000000000011dc10 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000