syzkaller login: [ 31.086228] BUG: Bad rss-counter state mm:00000000d55d5055 type:MM_FILEPAGES val:33 [ 31.087218] BUG: Bad rss-counter state mm:00000000d55d5055 type:MM_ANONPAGES val:22 [ 31.249986] ================================================================== [ 31.251058] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.252160] Read of size 8 at addr ffff88800e170df0 by task sshd/220 [ 31.253264] [ 31.253518] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.254361] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.255335] Call Trace: [ 31.255655] [ 31.255934] dump_stack_lvl+0x91/0xf0 [ 31.256418] print_report+0xcc/0x620 [ 31.256898] ? __virt_addr_valid+0x102/0x340 [ 31.257457] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.258067] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.258673] kasan_report+0xbe/0xf0 [ 31.259149] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.259763] vma_interval_tree_remove+0xc75/0xec0 [ 31.260354] vma_prepare+0xc54/0x11a0 [ 31.260826] __split_vma+0x5af/0x950 [ 31.261305] ? __pfx___split_vma+0x10/0x10 [ 31.261829] ? find_held_lock+0x2c/0x110 [ 31.262342] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.262912] ? lock_is_held_type+0x9f/0x120 [ 31.263446] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.264053] ? mtree_range_walk+0x632/0x900 [ 31.264647] ? mas_walk+0x5c7/0x7c0 [ 31.265121] do_vmi_munmap+0x1f1/0x2b0 [ 31.265632] mmap_region+0x1f9/0x2660 [ 31.266112] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.266634] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.267387] ? __pfx_lock_acquire+0x10/0x10 [ 31.267916] ? __pfx_mmap_region+0x10/0x10 [ 31.268439] ? security_mmap_addr+0x7d/0xa0 [ 31.268964] ? get_unmapped_area+0x1f5/0x3f0 [ 31.269516] do_mmap+0x854/0xf00 [ 31.269953] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.270443] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.271001] ksys_mmap_pgoff+0x3af/0x500 [ 31.271503] do_syscall_64+0x3f/0x90 [ 31.271981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.272625] RIP: 0033:0x7faa95d7cd82 [ 31.273082] 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 [ 31.275198] RSP: 002b:00007ffc1d2641e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.276091] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faa95d7cd82 [ 31.276928] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faa951b6000 [ 31.277783] RBP: 00007faa951b6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.278627] R10: 0000000000000812 R11: 0000000000000206 R12: 00005597390a3ec0 [ 31.279467] R13: 00007ffc1d264200 R14: 00007ffc1d264230 R15: 00007ffc1d264590 [ 31.280332] [ 31.280621] [ 31.280833] Allocated by task 213: [ 31.281260] kasan_save_stack+0x22/0x50 [ 31.281753] kasan_set_track+0x25/0x30 [ 31.282246] __kasan_slab_alloc+0x59/0x70 [ 31.282781] kmem_cache_alloc+0x16b/0x370 [ 31.283295] vm_area_dup+0x20/0x160 [ 31.283757] __split_vma+0x170/0x950 [ 31.284227] split_vma+0xc6/0x110 [ 31.284674] mprotect_fixup+0x8d2/0xb30 [ 31.285179] do_mprotect_pkey+0x87e/0xd40 [ 31.285701] __x64_sys_mprotect+0x78/0xc0 [ 31.286221] do_syscall_64+0x3f/0x90 [ 31.286692] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.287337] [ 31.287553] Freed by task 213: [ 31.287950] kasan_save_stack+0x22/0x50 [ 31.288451] kasan_set_track+0x25/0x30 [ 31.288949] kasan_save_free_info+0x2b/0x50 [ 31.289491] __kasan_slab_free+0x10a/0x190 [ 31.290025] kmem_cache_free+0x10d/0x4d0 [ 31.290530] rcu_core+0x8c8/0x2860 [ 31.290973] __do_softirq+0x1b7/0x7d4 [ 31.291446] [ 31.291658] Last potentially related work creation: [ 31.292239] kasan_save_stack+0x22/0x50 [ 31.292748] __kasan_record_aux_stack+0x8e/0xa0 [ 31.293321] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.294072] remove_vma+0x139/0x170 [ 31.294521] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.295069] do_vmi_munmap+0x1f1/0x2b0 [ 31.295555] __vm_munmap+0x138/0x3a0 [ 31.296024] __x64_sys_munmap+0x59/0x80 [ 31.296519] do_syscall_64+0x3f/0x90 [ 31.296991] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.297658] [ 31.297871] The buggy address belongs to the object at ffff88800e170d98 [ 31.297871] which belongs to the cache vm_area_struct of size 168 [ 31.299314] The buggy address is located 88 bytes inside of [ 31.299314] freed 168-byte region [ffff88800e170d98, ffff88800e170e40) [ 31.300696] [ 31.300908] The buggy address belongs to the physical page: [ 31.301567] page:0000000067341104 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe170 [ 31.302641] memcg:ffff8880146bdc01 [ 31.303062] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.303703] page_type: 0xffffffff() [ 31.304154] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.305064] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146bdc01 [ 31.305984] page dumped because: kasan: bad access detected [ 31.306644] [ 31.306857] Memory state around the buggy address: [ 31.307432] ffff88800e170c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.308282] ffff88800e170d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.309127] >ffff88800e170d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.309983] ^ [ 31.310788] ffff88800e170e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.311640] ffff88800e170e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.312483] ================================================================== [ 31.313515] Disabling lock debugging due to kernel taint [ 34.040219] BUG: Bad rss-counter state mm:00000000ec1d1f09 type:MM_FILEPAGES val:33 [ 34.041219] BUG: Bad rss-counter state mm:00000000ec1d1f09 type:MM_ANONPAGES val:22 [ 34.497254] BUG: Bad rss-counter state mm:00000000b3f402ec type:MM_FILEPAGES val:33 [ 34.499106] BUG: Bad rss-counter state mm:00000000b3f402ec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42328' (ECDSA) to the list of known hosts. 2023/06/20 23:45:48 fuzzer started 2023/06/20 23:45:49 dialing manager at localhost:36067 2023/06/20 23:45:49 checking machine... 2023/06/20 23:45:49 checking revisions... [ 35.222504] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:45:49 testing simple program... [ 35.271253] cgroup: Unknown subsys name 'net' [ 35.329933] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:45:48 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=ffffffff85652b60 RCX=ffffffff814c84a1 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=ffffffff86621198 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888019785c60 RIP=ffffffff814c0250 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 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=00007ffe1ebec9f8 CR3=000000001a422000 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=2038343a35343a3332203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a35343a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888008e08001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008e07f01 RSI=ffff888008e07f28 RDI=ffff88806cf09a88 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =ffffffff860b9c96 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=000000000000ba8f R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff888008e07f30 R15=ffff88806cf09a78 RIP=ffffffff81131039 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 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=00007fd3d5208000 CR3=0000000008eca000 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=c79c2198440e9ab4cb4ab9743049b2d3 XMM02=000000000011bd90ec2efd57dc4c00df XMM03=0000000000122b70b2fc82b5f2edd5e0 XMM04=c1f1995074ddf9ca00000000000ae988 XMM05=19e9129bd510f2350000000000132a58 XMM06=4fda316b135da52b00000000001328e0 XMM07=e042d86d42eb936e0000000000123558 XMM08=b2fc82b5f2edd5e0000000000011bdf0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000