syzkaller login: [ 28.734406] BUG: Bad rss-counter state mm:00000000ffd22e0e type:MM_FILEPAGES val:33 [ 28.735388] BUG: Bad rss-counter state mm:00000000ffd22e0e type:MM_ANONPAGES val:22 [ 28.905183] ================================================================== [ 28.906115] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.907204] Read of size 8 at addr ffff88800e943c20 by task sshd/220 [ 28.907988] [ 28.908205] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.909077] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.910045] Call Trace: [ 28.910365] [ 28.910643] dump_stack_lvl+0x91/0xf0 [ 28.911131] print_report+0xcc/0x620 [ 28.911612] ? __virt_addr_valid+0x102/0x340 [ 28.912182] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.912793] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.913407] kasan_report+0xbe/0xf0 [ 28.913875] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.914499] vma_interval_tree_remove+0xc75/0xec0 [ 28.915105] vma_prepare+0xc54/0x11a0 [ 28.915578] __split_vma+0x5af/0x950 [ 28.916065] ? __pfx___split_vma+0x10/0x10 [ 28.916593] ? find_held_lock+0x2c/0x110 [ 28.917106] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.917669] ? lock_is_held_type+0x9f/0x120 [ 28.918208] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.918810] ? mtree_range_walk+0x632/0x900 [ 28.919360] ? mas_walk+0x5c7/0x7c0 [ 28.919854] do_vmi_munmap+0x1f1/0x2b0 [ 28.920345] mmap_region+0x1f9/0x2660 [ 28.920823] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.921337] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.922041] ? __pfx_lock_acquire+0x10/0x10 [ 28.922569] ? __pfx_mmap_region+0x10/0x10 [ 28.923095] ? security_mmap_addr+0x7d/0xa0 [ 28.923627] ? get_unmapped_area+0x1f5/0x3f0 [ 28.924180] do_mmap+0x854/0xf00 [ 28.924613] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.925109] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.925667] ksys_mmap_pgoff+0x3af/0x500 [ 28.926176] do_syscall_64+0x3f/0x90 [ 28.926663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.927308] RIP: 0033:0x7fb549b4fd82 [ 28.927781] 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 [ 28.929875] RSP: 002b:00007ffd4c38fb18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.930783] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb549b4fd82 [ 28.931636] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb548f89000 [ 28.932488] RBP: 00007fb548f89000 R08: 0000000000000009 R09: 0000000000001000 [ 28.933322] R10: 0000000000000812 R11: 0000000000000206 R12: 00005576a4d20ec0 [ 28.934170] R13: 00007ffd4c38fb30 R14: 00007ffd4c38fb60 R15: 00007ffd4c38fec0 [ 28.935029] [ 28.935319] [ 28.935532] Allocated by task 211: [ 28.935961] kasan_save_stack+0x22/0x50 [ 28.936468] kasan_set_track+0x25/0x30 [ 28.936957] __kasan_slab_alloc+0x59/0x70 [ 28.937477] kmem_cache_alloc+0x16b/0x370 [ 28.937993] vm_area_dup+0x20/0x160 [ 28.938447] __split_vma+0x170/0x950 [ 28.938913] split_vma+0xc6/0x110 [ 28.939352] mprotect_fixup+0x8d2/0xb30 [ 28.939880] do_mprotect_pkey+0x87e/0xd40 [ 28.940403] __x64_sys_mprotect+0x78/0xc0 [ 28.940922] do_syscall_64+0x3f/0x90 [ 28.941401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.942040] [ 28.942258] Freed by task 211: [ 28.942648] kasan_save_stack+0x22/0x50 [ 28.943142] kasan_set_track+0x25/0x30 [ 28.943625] kasan_save_free_info+0x2b/0x50 [ 28.944160] __kasan_slab_free+0x10a/0x190 [ 28.944682] kmem_cache_free+0x10d/0x4d0 [ 28.945183] rcu_core+0x8c8/0x2860 [ 28.945620] __do_softirq+0x1b7/0x7d4 [ 28.946097] [ 28.946314] Last potentially related work creation: [ 28.946895] kasan_save_stack+0x22/0x50 [ 28.947397] __kasan_record_aux_stack+0x8e/0xa0 [ 28.948035] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.948667] remove_vma+0x139/0x170 [ 28.949110] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.949662] do_vmi_munmap+0x1f1/0x2b0 [ 28.950148] __vm_munmap+0x138/0x3a0 [ 28.950607] __x64_sys_munmap+0x59/0x80 [ 28.951099] do_syscall_64+0x3f/0x90 [ 28.951574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.952234] [ 28.952456] Second to last potentially related work creation: [ 28.953127] kasan_save_stack+0x22/0x50 [ 28.953622] __kasan_record_aux_stack+0x8e/0xa0 [ 28.954185] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.954825] remove_vma+0x139/0x170 [ 28.955275] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.955840] do_vmi_munmap+0x1f1/0x2b0 [ 28.956324] mmap_region+0x1f9/0x2660 [ 28.956795] do_mmap+0x854/0xf00 [ 28.957220] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.957710] ksys_mmap_pgoff+0x3af/0x500 [ 28.958208] do_syscall_64+0x3f/0x90 [ 28.958680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.959315] [ 28.959526] The buggy address belongs to the object at ffff88800e943bc8 [ 28.959526] which belongs to the cache vm_area_struct of size 168 [ 28.960996] The buggy address is located 88 bytes inside of [ 28.960996] freed 168-byte region [ffff88800e943bc8, ffff88800e943c70) [ 28.962379] [ 28.962592] The buggy address belongs to the physical page: [ 28.963249] page:000000001aac28f5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe943 [ 28.964328] memcg:ffff88800e626001 [ 28.964745] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.965433] page_type: 0xffffffff() [ 28.965878] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 28.966790] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e626001 [ 28.967685] page dumped because: kasan: bad access detected [ 28.968351] [ 28.968562] Memory state around the buggy address: [ 28.969138] ffff88800e943b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.969981] ffff88800e943b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 28.970823] >ffff88800e943c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.971664] ^ [ 28.972212] ffff88800e943c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 28.973062] ffff88800e943d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 28.973896] ================================================================== [ 28.974834] Disabling lock debugging due to kernel taint [ 31.744817] BUG: Bad rss-counter state mm:000000009a11bad5 type:MM_FILEPAGES val:33 [ 31.745964] BUG: Bad rss-counter state mm:000000009a11bad5 type:MM_ANONPAGES val:22 [ 32.215381] BUG: Bad rss-counter state mm:000000004b57c5e2 type:MM_FILEPAGES val:33 [ 32.216566] BUG: Bad rss-counter state mm:000000004b57c5e2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64973' (ECDSA) to the list of known hosts. 2023/06/20 17:18:23 fuzzer started 2023/06/20 17:18:23 dialing manager at localhost:36067 2023/06/20 17:18:23 checking machine... 2023/06/20 17:18:23 checking revisions... [ 32.850859] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:18:23 testing simple program... [ 32.903531] cgroup: Unknown subsys name 'net' [ 32.953644] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:18:23 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff814c8575 RDI=ffffffff8560b640 RBP=1ffff1100d9c132e RSP=ffff88806ce09960 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=ffff88800ffe57a0 RIP=ffffffff812d8699 RFL=00000216 [----AP-] 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=00007fff33522378 CR3=0000000005482000 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=00007fdf12545510000055da83808790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff863b3584 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800ff27a58 RSP=ffff88800ff27990 R8 =ffffffff863b3588 R9 =ffff88800ff27a40 R10=0000000000038001 R11=000000000008a96a R12=ffff88800ff27a60 R13=ffff88800ff27a48 R14=ffff88800ff27f40 R15=ffff88800ff27a00 RIP=ffffffff81131153 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 00007f37a7f16900 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=00007f37a84cd618 CR3=000000001c9f6000 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=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