syzkaller login: [ 32.652027] BUG: Bad rss-counter state mm:00000000f32af448 type:MM_FILEPAGES val:33 [ 32.653549] BUG: Bad rss-counter state mm:00000000f32af448 type:MM_ANONPAGES val:22 [ 32.803017] ================================================================== [ 32.803942] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.804912] Read of size 8 at addr ffff88800da234e0 by task sshd/222 [ 32.805693] [ 32.805914] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.806965] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.807971] Call Trace: [ 32.808297] [ 32.808601] dump_stack_lvl+0x91/0xf0 [ 32.809093] print_report+0xcc/0x620 [ 32.809582] ? __virt_addr_valid+0x102/0x340 [ 32.810146] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.810767] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.811405] kasan_report+0xbe/0xf0 [ 32.811886] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.812524] vma_interval_tree_remove+0xc75/0xec0 [ 32.813135] vma_prepare+0xc54/0x11a0 [ 32.813618] __split_vma+0x5af/0x950 [ 32.814094] ? __pfx___split_vma+0x10/0x10 [ 32.814625] ? find_held_lock+0x2c/0x110 [ 32.815145] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.815716] ? lock_is_held_type+0x9f/0x120 [ 32.816256] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.816889] ? mtree_range_walk+0x632/0x900 [ 32.817444] ? mas_walk+0x5c7/0x7c0 [ 32.817924] do_vmi_munmap+0x1f1/0x2b0 [ 32.818417] mmap_region+0x1f9/0x2660 [ 32.818900] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.819421] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.820137] ? __pfx_lock_acquire+0x10/0x10 [ 32.820678] ? __pfx_mmap_region+0x10/0x10 [ 32.821210] ? security_mmap_addr+0x7d/0xa0 [ 32.821737] ? get_unmapped_area+0x1f5/0x3f0 [ 32.822288] do_mmap+0x854/0xf00 [ 32.822726] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.823223] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.823794] ksys_mmap_pgoff+0x3af/0x500 [ 32.824305] do_syscall_64+0x3f/0x90 [ 32.824807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.825452] RIP: 0033:0x7f6e39bd1d82 [ 32.825912] 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 [ 32.828029] RSP: 002b:00007fff4f7910a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.828938] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e39bd1d82 [ 32.829786] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e3900b000 [ 32.830632] RBP: 00007f6e3900b000 R08: 0000000000000009 R09: 0000000000001000 [ 32.831485] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562605953ec0 [ 32.832330] R13: 00007fff4f7910c0 R14: 00007fff4f7910f0 R15: 00007fff4f791450 [ 32.833202] [ 32.833497] [ 32.833713] Allocated by task 215: [ 32.834150] kasan_save_stack+0x22/0x50 [ 32.834655] kasan_set_track+0x25/0x30 [ 32.835150] __kasan_slab_alloc+0x59/0x70 [ 32.835677] kmem_cache_alloc+0x16b/0x370 [ 32.836194] vm_area_dup+0x20/0x160 [ 32.836671] __split_vma+0x170/0x950 [ 32.837142] split_vma+0xc6/0x110 [ 32.837587] mprotect_fixup+0x8d2/0xb30 [ 32.838095] do_mprotect_pkey+0x87e/0xd40 [ 32.838623] __x64_sys_mprotect+0x78/0xc0 [ 32.839146] do_syscall_64+0x3f/0x90 [ 32.839620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.840271] [ 32.840494] Freed by task 215: [ 32.840889] kasan_save_stack+0x22/0x50 [ 32.841392] kasan_set_track+0x25/0x30 [ 32.841889] kasan_save_free_info+0x2b/0x50 [ 32.842426] __kasan_slab_free+0x10a/0x190 [ 32.842965] kmem_cache_free+0x10d/0x4d0 [ 32.843488] rcu_core+0x8c8/0x2860 [ 32.843941] __do_softirq+0x1b7/0x7d4 [ 32.844415] [ 32.844649] Last potentially related work creation: [ 32.845245] kasan_save_stack+0x22/0x50 [ 32.845746] __kasan_record_aux_stack+0x8e/0xa0 [ 32.846319] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.846967] remove_vma+0x139/0x170 [ 32.847490] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.848055] do_vmi_munmap+0x1f1/0x2b0 [ 32.848546] __vm_munmap+0x138/0x3a0 [ 32.849013] __x64_sys_munmap+0x59/0x80 [ 32.849506] do_syscall_64+0x3f/0x90 [ 32.849978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.850614] [ 32.850831] The buggy address belongs to the object at ffff88800da23488 [ 32.850831] which belongs to the cache vm_area_struct of size 168 [ 32.852303] The buggy address is located 88 bytes inside of [ 32.852303] freed 168-byte region [ffff88800da23488, ffff88800da23530) [ 32.853707] [ 32.853925] The buggy address belongs to the physical page: [ 32.854581] page:00000000969d644a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda23 [ 32.855666] memcg:ffff88800e7d6301 [ 32.856096] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.856769] page_type: 0xffffffff() [ 32.857223] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.858156] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7d6301 [ 32.859069] page dumped because: kasan: bad access detected [ 32.859727] [ 32.859943] Memory state around the buggy address: [ 32.860538] ffff88800da23380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.861403] ffff88800da23400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.862260] >ffff88800da23480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.863106] ^ [ 32.863860] ffff88800da23500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.864739] ffff88800da23580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.865594] ================================================================== [ 32.866519] Disabling lock debugging due to kernel taint [ 34.840737] BUG: Bad rss-counter state mm:000000002eff2465 type:MM_FILEPAGES val:33 [ 34.842128] BUG: Bad rss-counter state mm:000000002eff2465 type:MM_ANONPAGES val:22 [ 35.339803] BUG: Bad rss-counter state mm:0000000082a14939 type:MM_FILEPAGES val:33 [ 35.341041] BUG: Bad rss-counter state mm:0000000082a14939 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11528' (ECDSA) to the list of known hosts. 2023/06/19 23:35:04 fuzzer started 2023/06/19 23:35:05 dialing manager at localhost:44161 2023/06/19 23:35:05 checking machine... 2023/06/19 23:35:05 checking revisions... [ 36.055132] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:35:05 testing simple program... [ 36.110195] cgroup: Unknown subsys name 'net' [ 36.145423] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:35:02 Registers: info registers vcpu 0 RAX=1ffffffff0a5883f RBX=0000000000000000 RCX=1ffff110028bd1eb RDX=dffffc0000000000 RSI=0000000000000000 RDI=000000000c558000 RBP=ffff8880145e8940 RSP=ffff88801645f668 R8 =ffff8880145e8f58 R9 =ffffed10028bd1ec R10=ffff8880145e8f67 R11=0000000000000000 R12=ffff8880102440c0 R13=0000000000000000 R14=0000000000000020 R15=00000000000000cf RIP=ffffffff81143e8c 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc8edc2c700 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=00007ffea6614000 CR3=000000000c558000 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=35333a3332203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3133325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303632 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fe7d5989670 CR3=000000000f64e000 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=50f1df65dc2c19bcb54cbaa13d5c54a2 XMM02=ec2efd57dc4c00df000000000011fdc8 XMM03=a69d7e26f1af42c5000000000011fe98 XMM04=51694857d3e56a3d00000000000ae988 XMM05=59d5b690e0af863b0000000000134178 XMM06=9d581cf2133f1b080000000000132fe0 XMM07=e042d86d42eb936e0000000000124858 XMM08=a69d7e26f1af42c5000000000011fe98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000