syzkaller login: [ 35.724587] BUG: Bad rss-counter state mm:00000000a6c9436a type:MM_FILEPAGES val:33 [ 35.725780] BUG: Bad rss-counter state mm:00000000a6c9436a type:MM_ANONPAGES val:22 [ 35.762492] ================================================================== [ 35.763479] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.764508] Read of size 8 at addr ffff88800c46b4e0 by task sshd/219 [ 35.765277] [ 35.765499] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.766350] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.767367] Call Trace: [ 35.767693] [ 35.767979] dump_stack_lvl+0x91/0xf0 [ 35.768467] print_report+0xcc/0x620 [ 35.768957] ? __virt_addr_valid+0x102/0x340 [ 35.769504] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.770118] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.770735] kasan_report+0xbe/0xf0 [ 35.771253] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.771872] vma_interval_tree_remove+0xc75/0xec0 [ 35.772470] vma_prepare+0xc54/0x11a0 [ 35.772942] __split_vma+0x5af/0x950 [ 35.773411] ? __pfx___split_vma+0x10/0x10 [ 35.773935] ? find_held_lock+0x2c/0x110 [ 35.774452] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.775055] ? lock_is_held_type+0x9f/0x120 [ 35.775599] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.776205] ? mtree_range_walk+0x632/0x900 [ 35.776752] ? mas_walk+0x5c7/0x7c0 [ 35.777224] do_vmi_munmap+0x1f1/0x2b0 [ 35.777721] mmap_region+0x1f9/0x2660 [ 35.778201] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.778711] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.779448] ? __pfx_lock_acquire+0x10/0x10 [ 35.779973] ? __pfx_mmap_region+0x10/0x10 [ 35.780499] ? security_mmap_addr+0x7d/0xa0 [ 35.781030] ? get_unmapped_area+0x1f5/0x3f0 [ 35.781573] do_mmap+0x854/0xf00 [ 35.782012] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.782514] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.783124] ksys_mmap_pgoff+0x3af/0x500 [ 35.783630] do_syscall_64+0x3f/0x90 [ 35.784108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.784746] RIP: 0033:0x7f3a6377fd82 [ 35.785201] 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 [ 35.787327] RSP: 002b:00007ffd55037138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.788229] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3a6377fd82 [ 35.789085] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3a62bb9000 [ 35.790006] RBP: 00007f3a62bb9000 R08: 0000000000000009 R09: 0000000000001000 [ 35.790942] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ca3f2c4ec0 [ 35.791785] R13: 00007ffd55037150 R14: 00007ffd55037180 R15: 00007ffd550374e0 [ 35.792658] [ 35.792954] [ 35.793166] Allocated by task 212: [ 35.793589] kasan_save_stack+0x22/0x50 [ 35.794087] kasan_set_track+0x25/0x30 [ 35.794576] __kasan_slab_alloc+0x59/0x70 [ 35.795140] kmem_cache_alloc+0x16b/0x370 [ 35.795655] vm_area_dup+0x20/0x160 [ 35.796106] __split_vma+0x170/0x950 [ 35.796571] split_vma+0xc6/0x110 [ 35.797018] mprotect_fixup+0x8d2/0xb30 [ 35.797527] do_mprotect_pkey+0x87e/0xd40 [ 35.798050] __x64_sys_mprotect+0x78/0xc0 [ 35.798567] do_syscall_64+0x3f/0x90 [ 35.799069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.799712] [ 35.799926] Freed by task 212: [ 35.800311] kasan_save_stack+0x22/0x50 [ 35.800809] kasan_set_track+0x25/0x30 [ 35.801301] kasan_save_free_info+0x2b/0x50 [ 35.801827] __kasan_slab_free+0x10a/0x190 [ 35.802353] kmem_cache_free+0x10d/0x4d0 [ 35.802853] rcu_core+0x8c8/0x2860 [ 35.803332] __do_softirq+0x1b7/0x7d4 [ 35.803810] [ 35.804023] Last potentially related work creation: [ 35.804620] kasan_save_stack+0x22/0x50 [ 35.805122] __kasan_record_aux_stack+0x8e/0xa0 [ 35.805683] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.806325] remove_vma+0x139/0x170 [ 35.806777] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.807357] do_vmi_munmap+0x1f1/0x2b0 [ 35.807845] __vm_munmap+0x138/0x3a0 [ 35.808314] __x64_sys_munmap+0x59/0x80 [ 35.808805] do_syscall_64+0x3f/0x90 [ 35.809283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.809931] [ 35.810145] The buggy address belongs to the object at ffff88800c46b488 [ 35.810145] which belongs to the cache vm_area_struct of size 168 [ 35.811650] The buggy address is located 88 bytes inside of [ 35.811650] freed 168-byte region [ffff88800c46b488, ffff88800c46b530) [ 35.813062] [ 35.813275] The buggy address belongs to the physical page: [ 35.813933] page:00000000d0543252 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc46b [ 35.815036] memcg:ffff8880194a8f01 [ 35.815459] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.816096] page_type: 0xffffffff() [ 35.816540] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.817447] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880194a8f01 [ 35.818348] page dumped because: kasan: bad access detected [ 35.819042] [ 35.819256] Memory state around the buggy address: [ 35.819835] ffff88800c46b380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.820686] ffff88800c46b400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 35.821533] >ffff88800c46b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.822376] ^ [ 35.823161] ffff88800c46b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 35.824013] ffff88800c46b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.824858] ================================================================== [ 35.825973] Disabling lock debugging due to kernel taint [ 38.122797] BUG: Bad rss-counter state mm:00000000bce7b001 type:MM_FILEPAGES val:33 [ 38.123806] BUG: Bad rss-counter state mm:00000000bce7b001 type:MM_ANONPAGES val:22 [ 38.661860] BUG: Bad rss-counter state mm:00000000ce6148f6 type:MM_FILEPAGES val:33 [ 38.662810] BUG: Bad rss-counter state mm:00000000ce6148f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54810' (ECDSA) to the list of known hosts. 2023/06/20 01:38:49 fuzzer started 2023/06/20 01:38:49 dialing manager at localhost:44161 2023/06/20 01:38:49 checking machine... 2023/06/20 01:38:49 checking revisions... [ 39.291630] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:38:49 testing simple program... [ 39.339229] cgroup: Unknown subsys name 'net' [ 39.390213] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:38:43 Registers: info registers vcpu 0 RAX=ffffffff8180c585 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801689fc01 RSI=ffff88801689fca0 RDI=ffff88801689fca0 RBP=ffff88801689f9b0 RSP=ffff88801689f8e8 R8 =ffffffff8613751e R9 =ffff88801689f998 R10=0000000000038001 R11=0000000000020d8a R12=ffff88801689f9b8 R13=ffff88801689f9a0 R14=ffff88801689fca8 R15=ffff88801689f958 RIP=ffffffff81131041 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 00007f51e4cd8900 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=00007f51e528f618 CR3=000000000c63c000 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=563412feff00545000000000000080fe 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 info registers vcpu 1 RAX=ffffffff8180995d RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff8180995d RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020dae R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff888019d40ec0 RIP=ffffffff813ad420 RFL=00000282 [--S----] 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 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=00007f708b59c6c0 CR3=000000000fd04000 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=2038343a38333a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a38333a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000