syzkaller login: [ 30.488762] BUG: Bad rss-counter state mm:0000000070a0a153 type:MM_FILEPAGES val:33 [ 30.489983] BUG: Bad rss-counter state mm:0000000070a0a153 type:MM_ANONPAGES val:22 [ 30.530707] ================================================================== [ 30.531769] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.532941] Read of size 8 at addr ffff888017c966b0 by task sshd/221 [ 30.533853] [ 30.534116] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.535152] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.536306] Call Trace: [ 30.536714] [ 30.537048] dump_stack_lvl+0x91/0xf0 [ 30.537551] print_report+0xcc/0x620 [ 30.538040] ? __virt_addr_valid+0x102/0x340 [ 30.538599] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.539234] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.539858] kasan_report+0xbe/0xf0 [ 30.540330] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.540979] vma_interval_tree_remove+0xc75/0xec0 [ 30.541579] vma_prepare+0xc54/0x11a0 [ 30.542061] __split_vma+0x5af/0x950 [ 30.542540] ? __pfx___split_vma+0x10/0x10 [ 30.543078] ? find_held_lock+0x2c/0x110 [ 30.543599] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.544165] ? lock_is_held_type+0x9f/0x120 [ 30.544756] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.545365] ? mtree_range_walk+0x632/0x900 [ 30.545918] ? mas_walk+0x5c7/0x7c0 [ 30.546402] do_vmi_munmap+0x1f1/0x2b0 [ 30.546903] mmap_region+0x1f9/0x2660 [ 30.547385] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.547896] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.548630] ? __pfx_lock_acquire+0x10/0x10 [ 30.549170] ? __pfx_mmap_region+0x10/0x10 [ 30.549699] ? security_mmap_addr+0x7d/0xa0 [ 30.550236] ? get_unmapped_area+0x1f5/0x3f0 [ 30.550785] do_mmap+0x854/0xf00 [ 30.551226] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.551725] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.552310] ksys_mmap_pgoff+0x3af/0x500 [ 30.552828] do_syscall_64+0x3f/0x90 [ 30.553317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.553965] RIP: 0033:0x7ff4e67ddd82 [ 30.554421] 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 [ 30.556559] RSP: 002b:00007ffc69309bf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.557460] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff4e67ddd82 [ 30.558308] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff4e5c17000 [ 30.559159] RBP: 00007ff4e5c17000 R08: 0000000000000009 R09: 0000000000001000 [ 30.560002] R10: 0000000000000812 R11: 0000000000000206 R12: 000055699e714ec0 [ 30.560862] R13: 00007ffc69309c10 R14: 00007ffc69309c40 R15: 00007ffc69309fa0 [ 30.561723] [ 30.562023] [ 30.562236] Allocated by task 214: [ 30.562666] kasan_save_stack+0x22/0x50 [ 30.563184] kasan_set_track+0x25/0x30 [ 30.563682] __kasan_slab_alloc+0x59/0x70 [ 30.564209] kmem_cache_alloc+0x16b/0x370 [ 30.564745] vm_area_dup+0x20/0x160 [ 30.565199] __split_vma+0x170/0x950 [ 30.565668] split_vma+0xc6/0x110 [ 30.566111] mprotect_fixup+0x8d2/0xb30 [ 30.566610] do_mprotect_pkey+0x87e/0xd40 [ 30.567131] __x64_sys_mprotect+0x78/0xc0 [ 30.567653] do_syscall_64+0x3f/0x90 [ 30.568125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.568776] [ 30.568989] Freed by task 214: [ 30.569384] kasan_save_stack+0x22/0x50 [ 30.569884] kasan_set_track+0x25/0x30 [ 30.570378] kasan_save_free_info+0x2b/0x50 [ 30.570912] __kasan_slab_free+0x10a/0x190 [ 30.571447] kmem_cache_free+0x10d/0x4d0 [ 30.571956] rcu_core+0x8c8/0x2860 [ 30.572406] __do_softirq+0x1b7/0x7d4 [ 30.572883] [ 30.573096] Last potentially related work creation: [ 30.573676] kasan_save_stack+0x22/0x50 [ 30.574181] __kasan_record_aux_stack+0x8e/0xa0 [ 30.574751] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.575398] remove_vma+0x139/0x170 [ 30.575848] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.576423] do_vmi_munmap+0x1f1/0x2b0 [ 30.576904] __vm_munmap+0x138/0x3a0 [ 30.577374] __x64_sys_munmap+0x59/0x80 [ 30.577867] do_syscall_64+0x3f/0x90 [ 30.578346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.578987] [ 30.579204] The buggy address belongs to the object at ffff888017c96658 [ 30.579204] which belongs to the cache vm_area_struct of size 168 [ 30.580709] The buggy address is located 88 bytes inside of [ 30.580709] freed 168-byte region [ffff888017c96658, ffff888017c96700) [ 30.582115] [ 30.582332] The buggy address belongs to the physical page: [ 30.582991] page:00000000ad1ac608 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17c96 [ 30.584089] memcg:ffff88800be96e01 [ 30.584532] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.585175] page_type: 0xffffffff() [ 30.585624] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.586542] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800be96e01 [ 30.587450] page dumped because: kasan: bad access detected [ 30.588107] [ 30.588321] Memory state around the buggy address: [ 30.588910] ffff888017c96580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.589789] ffff888017c96600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.590653] >ffff888017c96680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.591504] ^ [ 30.592085] ffff888017c96700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.592965] ffff888017c96780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.593832] ================================================================== [ 30.594815] Disabling lock debugging due to kernel taint [ 32.428596] BUG: Bad rss-counter state mm:00000000d353a92c type:MM_FILEPAGES val:33 [ 32.429412] BUG: Bad rss-counter state mm:00000000d353a92c type:MM_ANONPAGES val:22 [ 32.889343] BUG: Bad rss-counter state mm:00000000ce957f04 type:MM_FILEPAGES val:33 [ 32.890274] BUG: Bad rss-counter state mm:00000000ce957f04 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28892' (ECDSA) to the list of known hosts. 2023/06/20 12:29:51 fuzzer started 2023/06/20 12:29:51 dialing manager at localhost:36067 2023/06/20 12:29:51 checking machine... 2023/06/20 12:29:51 checking revisions... [ 33.647137] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:29:51 testing simple program... [ 33.702044] cgroup: Unknown subsys name 'net' [ 33.751970] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:29:51 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff888015d03680 RSI=ffffffff83ab18a9 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801a06f500 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000ab R11=0000094700000947 R12=0000000000000000 R13=00000000000000ab R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff814c0871 RFL=00000283 [--S---C] 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 00007f86c5053900 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=00007f86c560a618 CR3=00000000168a2000 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=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=ffff88806cf02000 RBX=ffff88806cf09b30 RCX=ffff88806cf09b38 RDX=ffff88806cf0a000 RSI=ffff88806cf09a68 RDI=ffff88806cf09aa8 RBP=dffffc0000000000 RSP=ffff88806cf09a48 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffffed100d9e1355 R13=ffffed100d9e1354 R14=ffff88806cf09ae0 R15=ffff88806cf09a98 RIP=ffffffff81132fd4 RFL=00000212 [----A--] 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=00007f21005be730 CR3=000000000d634000 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=486b826176d5729cad481a85b58edff8 XMM02=ec2efd57dc4c00df000000000011c8d8 XMM03=5d63ef77f652399c000000000011c9a8 XMM04=fc3e33f47b6187ce00000000000ae988 XMM05=59d5b690e0af863b00000000001313b8 XMM06=0fb92208abcb9377000000000012fab8 XMM07=e042d86d42eb936e0000000000121870 XMM08=5d63ef77f652399c000000000011c9a8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000