syzkaller login: [ 29.178294] BUG: Bad rss-counter state mm:000000006e9775cd type:MM_FILEPAGES val:33 [ 29.179309] BUG: Bad rss-counter state mm:000000006e9775cd type:MM_ANONPAGES val:22 [ 29.337758] ================================================================== [ 29.338848] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.340105] Read of size 8 at addr ffff88801a457798 by task sshd/219 [ 29.341050] [ 29.341310] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.342353] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.343515] Call Trace: [ 29.343900] [ 29.344242] dump_stack_lvl+0x91/0xf0 [ 29.344858] print_report+0xcc/0x620 [ 29.345442] ? __virt_addr_valid+0x102/0x340 [ 29.345990] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.346598] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.347216] kasan_report+0xbe/0xf0 [ 29.347694] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.348314] vma_interval_tree_remove+0xc75/0xec0 [ 29.348920] vma_prepare+0xc54/0x11a0 [ 29.349405] __split_vma+0x5af/0x950 [ 29.349880] ? __pfx___split_vma+0x10/0x10 [ 29.350403] ? find_held_lock+0x2c/0x110 [ 29.350925] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.351490] ? lock_is_held_type+0x9f/0x120 [ 29.352026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.352633] ? mtree_range_walk+0x632/0x900 [ 29.353199] ? mas_walk+0x5c7/0x7c0 [ 29.353673] do_vmi_munmap+0x1f1/0x2b0 [ 29.354161] mmap_region+0x1f9/0x2660 [ 29.354649] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.355157] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.355876] ? __pfx_lock_acquire+0x10/0x10 [ 29.356408] ? __pfx_mmap_region+0x10/0x10 [ 29.356952] ? security_mmap_addr+0x7d/0xa0 [ 29.357487] ? get_unmapped_area+0x1f5/0x3f0 [ 29.358038] do_mmap+0x854/0xf00 [ 29.358476] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.358964] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.359524] ksys_mmap_pgoff+0x3af/0x500 [ 29.360036] do_syscall_64+0x3f/0x90 [ 29.360507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.361157] RIP: 0033:0x7f8f05f95d82 [ 29.361609] 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 [ 29.363726] RSP: 002b:00007ffec1560608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.364638] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f05f95d82 [ 29.365490] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f053cf000 [ 29.366343] RBP: 00007f8f053cf000 R08: 0000000000000009 R09: 0000000000001000 [ 29.367194] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb862e8f70 [ 29.368053] R13: 00007ffec1560620 R14: 00007ffec1560650 R15: 00007ffec15609b0 [ 29.368940] [ 29.369233] [ 29.369446] Allocated by task 212: [ 29.369876] kasan_save_stack+0x22/0x50 [ 29.370378] kasan_set_track+0x25/0x30 [ 29.370877] __kasan_slab_alloc+0x59/0x70 [ 29.371392] kmem_cache_alloc+0x16b/0x370 [ 29.371901] vm_area_dup+0x20/0x160 [ 29.372355] __split_vma+0x170/0x950 [ 29.372848] split_vma+0xc6/0x110 [ 29.373288] mprotect_fixup+0x8d2/0xb30 [ 29.373788] do_mprotect_pkey+0x87e/0xd40 [ 29.374309] __x64_sys_mprotect+0x78/0xc0 [ 29.374827] do_syscall_64+0x3f/0x90 [ 29.375305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.375953] [ 29.376168] Freed by task 19: [ 29.376553] kasan_save_stack+0x22/0x50 [ 29.377079] kasan_set_track+0x25/0x30 [ 29.377569] kasan_save_free_info+0x2b/0x50 [ 29.378101] __kasan_slab_free+0x10a/0x190 [ 29.378627] kmem_cache_free+0x10d/0x4d0 [ 29.379136] rcu_core+0x8c8/0x2860 [ 29.379578] __do_softirq+0x1b7/0x7d4 [ 29.380056] [ 29.380270] Last potentially related work creation: [ 29.380936] kasan_save_stack+0x22/0x50 [ 29.381440] __kasan_record_aux_stack+0x8e/0xa0 [ 29.382011] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.382655] remove_vma+0x139/0x170 [ 29.383110] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.383672] do_vmi_munmap+0x1f1/0x2b0 [ 29.384154] __vm_munmap+0x138/0x3a0 [ 29.384628] __x64_sys_munmap+0x59/0x80 [ 29.385134] do_syscall_64+0x3f/0x90 [ 29.385614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.386254] [ 29.386468] The buggy address belongs to the object at ffff88801a457740 [ 29.386468] which belongs to the cache vm_area_struct of size 168 [ 29.387927] The buggy address is located 88 bytes inside of [ 29.387927] freed 168-byte region [ffff88801a457740, ffff88801a4577e8) [ 29.389482] [ 29.389724] The buggy address belongs to the physical page: [ 29.390383] page:00000000e8f1f8c7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a457 [ 29.391476] memcg:ffff888017f69001 [ 29.391905] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.392548] page_type: 0xffffffff() [ 29.393026] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.393958] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017f69001 [ 29.394887] page dumped because: kasan: bad access detected [ 29.395549] [ 29.395762] Memory state around the buggy address: [ 29.396353] ffff88801a457680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.397223] ffff88801a457700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.398078] >ffff88801a457780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.398932] ^ [ 29.399425] ffff88801a457800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.400281] ffff88801a457880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.401131] ================================================================== [ 29.402037] Disabling lock debugging due to kernel taint [ 30.884669] BUG: Bad rss-counter state mm:00000000621d8e59 type:MM_FILEPAGES val:33 [ 30.885207] BUG: Bad rss-counter state mm:00000000621d8e59 type:MM_ANONPAGES val:22 [ 31.338690] BUG: Bad rss-counter state mm:00000000fd024297 type:MM_FILEPAGES val:31 [ 31.339660] BUG: Bad rss-counter state mm:00000000fd024297 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9101' (ECDSA) to the list of known hosts. 2023/06/19 21:30:48 fuzzer started 2023/06/19 21:30:48 dialing manager at localhost:44161 2023/06/19 21:30:48 checking machine... 2023/06/19 21:30:48 checking revisions... [ 32.048814] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:30:48 testing simple program... [ 32.103202] cgroup: Unknown subsys name 'net' [ 32.161416] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:30:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800f468000 RCX=0000000000000000 RDX=0000000000000000 RSI=000000000000001f RDI=ffff88800f468680 RBP=ffff888019c94000 RSP=ffff8880167afa68 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=ffff888015b49b40 R14=ffff88801699d800 R15=0000000000000b79 RIP=ffffffff844c9b16 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 00007f3b779a7700 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=00007ffe9b1599a8 CR3=0000000016822000 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=2038343a30333a3132203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a30333a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880147974a8 RCX=0000000000000001 RDX=1ffff110028f2e97 RSI=ffff888014797e48 RDI=ffff8880147974b8 RBP=ffff888014797e48 RSP=ffff888014797400 R8 =0000000000000001 R9 =ffff8880147974e8 R10=0000000000038001 R11=000000000001dda2 R12=0000000000000008 R13=ffff888014790000 R14=ffff888014797e48 R15=ffff8880147974a8 RIP=ffffffff81130468 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f307569f900 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=00007f3074a94aa0 CR3=000000000c68a000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=52222d5a0c3032e800000000000ae988 XMM05=20f819f58d75201100000000001355e0 XMM06=dfcdbad4f1609c370000000000134440 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000