syzkaller login: [ 38.706821] BUG: Bad rss-counter state mm:000000004092f999 type:MM_FILEPAGES val:33 [ 38.707819] BUG: Bad rss-counter state mm:000000004092f999 type:MM_ANONPAGES val:22 [ 38.881260] ================================================================== [ 38.882170] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.883133] Read of size 8 at addr ffff88800e17fc20 by task sshd/219 [ 38.883895] [ 38.884202] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.885069] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.886091] Call Trace: [ 38.886432] [ 38.886715] dump_stack_lvl+0x91/0xf0 [ 38.887219] print_report+0xcc/0x620 [ 38.887706] ? __virt_addr_valid+0x102/0x340 [ 38.888254] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888877] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.889495] kasan_report+0xbe/0xf0 [ 38.889970] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.890589] vma_interval_tree_remove+0xc75/0xec0 [ 38.891223] vma_prepare+0xc54/0x11a0 [ 38.891707] __split_vma+0x5af/0x950 [ 38.892186] ? __pfx___split_vma+0x10/0x10 [ 38.892724] ? find_held_lock+0x2c/0x110 [ 38.893248] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.893817] ? lock_is_held_type+0x9f/0x120 [ 38.894403] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.895026] ? mtree_range_walk+0x632/0x900 [ 38.895607] ? mas_walk+0x5c7/0x7c0 [ 38.896093] do_vmi_munmap+0x1f1/0x2b0 [ 38.896585] mmap_region+0x1f9/0x2660 [ 38.897075] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.897591] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.898311] ? __pfx_lock_acquire+0x10/0x10 [ 38.898846] ? __pfx_mmap_region+0x10/0x10 [ 38.899388] ? security_mmap_addr+0x7d/0xa0 [ 38.899931] ? get_unmapped_area+0x1f5/0x3f0 [ 38.900481] do_mmap+0x854/0xf00 [ 38.900919] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.901418] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.901982] ksys_mmap_pgoff+0x3af/0x500 [ 38.902492] do_syscall_64+0x3f/0x90 [ 38.903003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.903689] RIP: 0033:0x7f9e88ca7d82 [ 38.904154] 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 [ 38.906327] RSP: 002b:00007ffe11e4b0f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.907278] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9e88ca7d82 [ 38.908145] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9e880e1000 [ 38.908993] RBP: 00007f9e880e1000 R08: 0000000000000009 R09: 0000000000001000 [ 38.909841] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a02acf3f70 [ 38.910707] R13: 00007ffe11e4b110 R14: 00007ffe11e4b140 R15: 00007ffe11e4b4a0 [ 38.911581] [ 38.911892] [ 38.912131] Allocated by task 212: [ 38.912569] kasan_save_stack+0x22/0x50 [ 38.913074] kasan_set_track+0x25/0x30 [ 38.913572] __kasan_slab_alloc+0x59/0x70 [ 38.914110] kmem_cache_alloc+0x16b/0x370 [ 38.914637] vm_area_dup+0x20/0x160 [ 38.915116] __split_vma+0x170/0x950 [ 38.915589] split_vma+0xc6/0x110 [ 38.916037] mprotect_fixup+0x8d2/0xb30 [ 38.916543] do_mprotect_pkey+0x87e/0xd40 [ 38.917061] __x64_sys_mprotect+0x78/0xc0 [ 38.917585] do_syscall_64+0x3f/0x90 [ 38.918072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.918720] [ 38.918934] Freed by task 19: [ 38.919326] kasan_save_stack+0x22/0x50 [ 38.919833] kasan_set_track+0x25/0x30 [ 38.920322] kasan_save_free_info+0x2b/0x50 [ 38.920881] __kasan_slab_free+0x10a/0x190 [ 38.921445] kmem_cache_free+0x10d/0x4d0 [ 38.921970] rcu_core+0x8c8/0x2860 [ 38.922420] __do_softirq+0x1b7/0x7d4 [ 38.922895] [ 38.923130] Last potentially related work creation: [ 38.923735] kasan_save_stack+0x22/0x50 [ 38.924245] __kasan_record_aux_stack+0x8e/0xa0 [ 38.924830] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.925483] remove_vma+0x139/0x170 [ 38.925941] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.926507] do_vmi_munmap+0x1f1/0x2b0 [ 38.927000] __vm_munmap+0x138/0x3a0 [ 38.927479] __x64_sys_munmap+0x59/0x80 [ 38.927987] do_syscall_64+0x3f/0x90 [ 38.928466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.929136] [ 38.929379] Second to last potentially related work creation: [ 38.930088] kasan_save_stack+0x22/0x50 [ 38.930590] __kasan_record_aux_stack+0x8e/0xa0 [ 38.931197] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.931852] remove_vma+0x139/0x170 [ 38.932313] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.932888] do_vmi_munmap+0x1f1/0x2b0 [ 38.933384] mmap_region+0x1f9/0x2660 [ 38.933863] do_mmap+0x854/0xf00 [ 38.934298] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.934785] ksys_mmap_pgoff+0x7d/0x500 [ 38.935297] do_syscall_64+0x3f/0x90 [ 38.935786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.936433] [ 38.936651] The buggy address belongs to the object at ffff88800e17fbc8 [ 38.936651] which belongs to the cache vm_area_struct of size 168 [ 38.938146] The buggy address is located 88 bytes inside of [ 38.938146] freed 168-byte region [ffff88800e17fbc8, ffff88800e17fc70) [ 38.939645] [ 38.939862] The buggy address belongs to the physical page: [ 38.940529] page:000000006e841b9f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe17f [ 38.941634] memcg:ffff88800dfb5301 [ 38.942071] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.942712] page_type: 0xffffffff() [ 38.943170] raw: 0100000000000200 ffff8880087a0c80 ffffea000037df40 dead000000000006 [ 38.944100] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfb5301 [ 38.945010] page dumped because: kasan: bad access detected [ 38.945676] [ 38.945898] Memory state around the buggy address: [ 38.946491] ffff88800e17fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.947413] ffff88800e17fb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.948276] >ffff88800e17fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.949138] ^ [ 38.949675] ffff88800e17fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.950537] ffff88800e17fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.951413] ================================================================== [ 38.952561] Disabling lock debugging due to kernel taint [ 41.215324] BUG: Bad rss-counter state mm:0000000074e71362 type:MM_FILEPAGES val:33 [ 41.216352] BUG: Bad rss-counter state mm:0000000074e71362 type:MM_ANONPAGES val:22 [ 41.719502] BUG: Bad rss-counter state mm:000000005ccc11c7 type:MM_FILEPAGES val:33 [ 41.720328] BUG: Bad rss-counter state mm:000000005ccc11c7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1868' (ECDSA) to the list of known hosts. 2023/06/20 22:08:15 fuzzer started 2023/06/20 22:08:15 dialing manager at localhost:36067 2023/06/20 22:08:15 checking machine... 2023/06/20 22:08:15 checking revisions... [ 42.391853] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:08:15 testing simple program... [ 42.425510] cgroup: Unknown subsys name 'net' [ 42.464541] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:08:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652b60 RCX=ffffffff814c84a1 RDX=ffff88800e763680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888015a97548 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f8761eb8fef R13=0000000000000000 R14=ffff88800e763680 R15=0000000000000000 RIP=ffffffff814c027c 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 00007f8761075700 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=00007f0f64b2e0b0 CR3=0000000019868000 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=2035313a38303a3232203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a38303a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000001 RBX=0000000000000200 RCX=ffffffff82243979 RDX=0000000000000200 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000020 RSP=ffff88801823fb40 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000200 R11=0000000000000000 R12=ffff88800f1932d0 R13=0000000000000001 R14=0000607f92e12410 R15=000000000000000d RIP=ffffffff814c0250 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc54612b900 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=00007fc54692a000 CR3=000000000d74a000 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=0078756e696c65732f73662f7379732f XMM01=0078756e696c65732f73662f7379732f XMM02=00000000ff0000ff0000ff0000000000 XMM03=000000000000000000000000000000ff XMM04=2f2f2f2f2f2f2f2f2f2f2f2f2f2f2f2f XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00007fc5461e75f000007fc5461e7060 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000