syzkaller login: [ 31.063117] BUG: Bad rss-counter state mm:000000006054f48b type:MM_FILEPAGES val:33 [ 31.064431] BUG: Bad rss-counter state mm:000000006054f48b type:MM_ANONPAGES val:22 [ 31.223172] ================================================================== [ 31.224274] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.225395] Read of size 8 at addr ffff888016bf4c20 by task sshd/220 [ 31.226505] [ 31.226772] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.227668] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.228599] Call Trace: [ 31.228895] [ 31.229156] dump_stack_lvl+0x91/0xf0 [ 31.229626] print_report+0xcc/0x620 [ 31.230069] ? __virt_addr_valid+0x102/0x340 [ 31.230596] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.231165] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.231752] kasan_report+0xbe/0xf0 [ 31.232196] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.232785] vma_interval_tree_remove+0xc75/0xec0 [ 31.233355] vma_prepare+0xc54/0x11a0 [ 31.233821] __split_vma+0x5af/0x950 [ 31.234283] ? __pfx___split_vma+0x10/0x10 [ 31.234798] ? find_held_lock+0x2c/0x110 [ 31.235284] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.235819] ? lock_is_held_type+0x9f/0x120 [ 31.236312] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.236890] ? mtree_range_walk+0x632/0x900 [ 31.237416] ? mas_walk+0x5c7/0x7c0 [ 31.237879] do_vmi_munmap+0x1f1/0x2b0 [ 31.238368] mmap_region+0x1f9/0x2660 [ 31.238921] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.239534] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.240387] ? __pfx_lock_acquire+0x10/0x10 [ 31.241028] ? __pfx_mmap_region+0x10/0x10 [ 31.241657] ? security_mmap_addr+0x7d/0xa0 [ 31.242311] ? get_unmapped_area+0x1f5/0x3f0 [ 31.242962] do_mmap+0x854/0xf00 [ 31.243469] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.244056] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.244738] ksys_mmap_pgoff+0x3af/0x500 [ 31.245366] do_syscall_64+0x3f/0x90 [ 31.245925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.246658] RIP: 0033:0x7f42b3b69d82 [ 31.247215] 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 [ 31.249745] RSP: 002b:00007ffc16acf038 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.250851] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f42b3b69d82 [ 31.251871] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f42b2fa3000 [ 31.252871] RBP: 00007f42b2fa3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.253871] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c21dc3fd90 [ 31.254909] R13: 00007ffc16acf050 R14: 00007ffc16acf080 R15: 00007ffc16acf3e0 [ 31.255943] [ 31.256309] [ 31.256563] Allocated by task 213: [ 31.257076] kasan_save_stack+0x22/0x50 [ 31.257688] kasan_set_track+0x25/0x30 [ 31.258279] __kasan_slab_alloc+0x59/0x70 [ 31.258792] kmem_cache_alloc+0x16b/0x370 [ 31.259286] vm_area_dup+0x20/0x160 [ 31.259736] __split_vma+0x170/0x950 [ 31.260171] split_vma+0xc6/0x110 [ 31.260594] mprotect_fixup+0x8d2/0xb30 [ 31.261075] do_mprotect_pkey+0x87e/0xd40 [ 31.261587] __x64_sys_mprotect+0x78/0xc0 [ 31.262122] do_syscall_64+0x3f/0x90 [ 31.262733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.263513] [ 31.263778] Freed by task 213: [ 31.264247] kasan_save_stack+0x22/0x50 [ 31.264862] kasan_set_track+0x25/0x30 [ 31.265460] kasan_save_free_info+0x2b/0x50 [ 31.266075] __kasan_slab_free+0x10a/0x190 [ 31.266606] kmem_cache_free+0x10d/0x4d0 [ 31.267090] rcu_core+0x8c8/0x2860 [ 31.267529] __do_softirq+0x1b7/0x7d4 [ 31.267981] [ 31.268189] Last potentially related work creation: [ 31.268758] kasan_save_stack+0x22/0x50 [ 31.269238] __kasan_record_aux_stack+0x8e/0xa0 [ 31.269806] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.270432] remove_vma+0x139/0x170 [ 31.270885] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.271419] do_vmi_munmap+0x1f1/0x2b0 [ 31.271897] __vm_munmap+0x138/0x3a0 [ 31.272340] __x64_sys_munmap+0x59/0x80 [ 31.272814] do_syscall_64+0x3f/0x90 [ 31.273264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.273887] [ 31.274096] Second to last potentially related work creation: [ 31.274791] kasan_save_stack+0x22/0x50 [ 31.275267] __kasan_record_aux_stack+0x8e/0xa0 [ 31.275821] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.276429] remove_vma+0x139/0x170 [ 31.276865] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.277398] do_vmi_munmap+0x1f1/0x2b0 [ 31.277868] __vm_munmap+0x138/0x3a0 [ 31.278319] __x64_sys_munmap+0x59/0x80 [ 31.278818] do_syscall_64+0x3f/0x90 [ 31.279270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.279875] [ 31.280075] The buggy address belongs to the object at ffff888016bf4bc8 [ 31.280075] which belongs to the cache vm_area_struct of size 168 [ 31.281474] The buggy address is located 88 bytes inside of [ 31.281474] freed 168-byte region [ffff888016bf4bc8, ffff888016bf4c70) [ 31.282841] [ 31.283047] The buggy address belongs to the physical page: [ 31.283709] page:00000000679a3f58 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16bf4 [ 31.284762] memcg:ffff888016d86401 [ 31.285168] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.285787] page_type: 0xffffffff() [ 31.286235] raw: 0100000000000200 ffff8880087a0c80 ffffea0000678900 dead000000000006 [ 31.287145] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d86401 [ 31.288026] page dumped because: kasan: bad access detected [ 31.288659] [ 31.288867] Memory state around the buggy address: [ 31.289409] ffff888016bf4b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.290239] ffff888016bf4b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.291069] >ffff888016bf4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.291895] ^ [ 31.292396] ffff888016bf4c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.293227] ffff888016bf4d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.294055] ================================================================== [ 31.295260] Disabling lock debugging due to kernel taint [ 33.416805] BUG: Bad rss-counter state mm:0000000088925b1e type:MM_FILEPAGES val:33 [ 33.417971] BUG: Bad rss-counter state mm:0000000088925b1e type:MM_ANONPAGES val:22 [ 33.802898] BUG: Bad rss-counter state mm:00000000419579d0 type:MM_FILEPAGES val:33 [ 33.803907] BUG: Bad rss-counter state mm:00000000419579d0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32632' (ECDSA) to the list of known hosts. 2023/06/21 07:37:17 fuzzer started 2023/06/21 07:37:17 dialing manager at localhost:36067 2023/06/21 07:37:17 checking machine... 2023/06/21 07:37:17 checking revisions... [ 34.515719] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:37:17 testing simple program... [ 34.566069] cgroup: Unknown subsys name 'net' [ 34.606363] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:37:17 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880098eb980 RCX=ffff88800844f780 RDX=ffffea0000353b80 RSI=ffff88800d4eee40 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff8880165af9f8 R8 =ffff88800d4eeab0 R9 =0000000000000000 R10=ffffea0000353b80 R11=00000000800d0009 R12=dffffc0000000000 R13=ffff8880165afa38 R14=ffff88800844f780 R15=ffff88800d4eee40 RIP=ffffffff81810316 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 00007fca08e88900 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=00007fca0943f618 CR3=000000000f6b2000 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=2036313a37333a3730203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a37333a3730203132 XMM08=3d656e696c646d632022656369767265 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=0000000000000001 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=00007fd426aba480 CR3=000000000c9e0000 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=0eaba946e08ac4abd74b454bafe94794 XMM02=2c67c8bc2e329bc3000000000011b748 XMM03=fb795ef6d65770560000000000122418 XMM04=3b8a743d6fb1b22900000000000ae988 XMM05=19e9129bd510f23500000000001332e8 XMM06=1000df70c2f8255a0000000000132150 XMM07=e042d86d42eb936e0000000000122698 XMM08=e0c7173ee299df5d000000000011b7a8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000