syzkaller login: [ 30.155183] BUG: Bad rss-counter state mm:000000001701b459 type:MM_FILEPAGES val:33 [ 30.156642] BUG: Bad rss-counter state mm:000000001701b459 type:MM_ANONPAGES val:22 [ 30.325483] ================================================================== [ 30.326554] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.327671] Read of size 8 at addr ffff88801a50a6b0 by task sshd/220 [ 30.328697] [ 30.328957] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.330001] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.331224] Call Trace: [ 30.331606] [ 30.331938] dump_stack_lvl+0x91/0xf0 [ 30.332540] print_report+0xcc/0x620 [ 30.333109] ? __virt_addr_valid+0x102/0x340 [ 30.333769] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.334522] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.335271] kasan_report+0xbe/0xf0 [ 30.335837] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.336605] vma_interval_tree_remove+0xc75/0xec0 [ 30.337339] vma_prepare+0xc54/0x11a0 [ 30.337910] __split_vma+0x5af/0x950 [ 30.338487] ? __pfx___split_vma+0x10/0x10 [ 30.339120] ? find_held_lock+0x2c/0x110 [ 30.339755] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.340452] ? lock_is_held_type+0x9f/0x120 [ 30.341130] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.341863] ? mtree_range_walk+0x632/0x900 [ 30.342539] ? mas_walk+0x5c7/0x7c0 [ 30.343109] do_vmi_munmap+0x1f1/0x2b0 [ 30.343708] mmap_region+0x1f9/0x2660 [ 30.344289] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.344908] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.345782] ? __pfx_lock_acquire+0x10/0x10 [ 30.346418] ? __pfx_mmap_region+0x10/0x10 [ 30.347066] ? security_mmap_addr+0x7d/0xa0 [ 30.347717] ? get_unmapped_area+0x1f5/0x3f0 [ 30.348391] do_mmap+0x854/0xf00 [ 30.348922] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.349524] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.350203] ksys_mmap_pgoff+0x3af/0x500 [ 30.350820] do_syscall_64+0x3f/0x90 [ 30.351413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.352201] RIP: 0033:0x7f1104c51d82 [ 30.352774] 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 [ 30.355361] RSP: 002b:00007fff632c8e58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.356462] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1104c51d82 [ 30.357516] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f110408b000 [ 30.358554] RBP: 00007f110408b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.359592] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561234a55ec0 [ 30.360633] R13: 00007fff632c8e70 R14: 00007fff632c8ea0 R15: 00007fff632c9200 [ 30.361441] [ 30.361717] [ 30.361922] Allocated by task 213: [ 30.362326] kasan_save_stack+0x22/0x50 [ 30.362799] kasan_set_track+0x25/0x30 [ 30.363264] __kasan_slab_alloc+0x59/0x70 [ 30.363758] kmem_cache_alloc+0x16b/0x370 [ 30.364240] vm_area_dup+0x20/0x160 [ 30.364697] __split_vma+0x170/0x950 [ 30.365134] split_vma+0xc6/0x110 [ 30.365550] mprotect_fixup+0x8d2/0xb30 [ 30.366021] do_mprotect_pkey+0x87e/0xd40 [ 30.366512] __x64_sys_mprotect+0x78/0xc0 [ 30.367003] do_syscall_64+0x3f/0x90 [ 30.367453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.368059] [ 30.368265] Freed by task 213: [ 30.368650] kasan_save_stack+0x22/0x50 [ 30.369126] kasan_set_track+0x25/0x30 [ 30.369594] kasan_save_free_info+0x2b/0x50 [ 30.370092] __kasan_slab_free+0x10a/0x190 [ 30.370601] kmem_cache_free+0x10d/0x4d0 [ 30.371099] rcu_core+0x8c8/0x2860 [ 30.371545] __do_softirq+0x1b7/0x7d4 [ 30.372015] [ 30.372231] Last potentially related work creation: [ 30.372839] kasan_save_stack+0x22/0x50 [ 30.373336] __kasan_record_aux_stack+0x8e/0xa0 [ 30.373902] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.374537] remove_vma+0x139/0x170 [ 30.374979] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.375522] do_vmi_munmap+0x1f1/0x2b0 [ 30.375997] __vm_munmap+0x138/0x3a0 [ 30.376461] __x64_sys_munmap+0x59/0x80 [ 30.376967] do_syscall_64+0x3f/0x90 [ 30.377432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.378065] [ 30.378283] The buggy address belongs to the object at ffff88801a50a658 [ 30.378283] which belongs to the cache vm_area_struct of size 168 [ 30.379760] The buggy address is located 88 bytes inside of [ 30.379760] freed 168-byte region [ffff88801a50a658, ffff88801a50a700) [ 30.381176] [ 30.381388] The buggy address belongs to the physical page: [ 30.382035] page:000000000c26fc55 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a50a [ 30.383121] memcg:ffff88800c4ff001 [ 30.383532] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.384178] page_type: 0xffffffff() [ 30.384643] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.385564] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4ff001 [ 30.386459] page dumped because: kasan: bad access detected [ 30.387107] [ 30.387324] Memory state around the buggy address: [ 30.387908] ffff88801a50a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.388769] ffff88801a50a600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.389617] >ffff88801a50a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.390457] ^ [ 30.391039] ffff88801a50a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.391889] ffff88801a50a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.392761] ================================================================== [ 30.393833] Disabling lock debugging due to kernel taint [ 32.389906] BUG: Bad rss-counter state mm:00000000d35d6dc7 type:MM_FILEPAGES val:33 [ 32.391280] BUG: Bad rss-counter state mm:00000000d35d6dc7 type:MM_ANONPAGES val:22 [ 32.812463] BUG: Bad rss-counter state mm:0000000067cbecc1 type:MM_FILEPAGES val:33 [ 32.813520] BUG: Bad rss-counter state mm:0000000067cbecc1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2293' (ECDSA) to the list of known hosts. 2023/06/20 21:01:09 fuzzer started 2023/06/20 21:01:09 dialing manager at localhost:36067 2023/06/20 21:01:09 checking machine... 2023/06/20 21:01:09 checking revisions... [ 33.577734] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:01:09 testing simple program... [ 33.636090] cgroup: Unknown subsys name 'net' [ 33.694148] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:01:09 Registers: info registers vcpu 0 RAX=0000777f80000000 RBX=ffff888015c5a2f0 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff813782f8 RDI=ffff8880087b8500 RBP=ffff88800f0bfda0 RSP=ffff88800f0bfd70 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d7d R12=ffff8880087b8500 R13=ffff888095c5a2f0 R14=ffffffff813782f8 R15=ffff888015c5a418 RIP=ffffffff81809b6e RFL=00000206 [-----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 00007f850960f900 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=00007ffe9ad0a000 CR3=000000000f818000 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=23232323232323232323232323232323 XMM01=000000000000000000000000000000ff XMM02=00000000000000000000000000000000 XMM03=6972746572206e69676f6c20666f2072 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=000000000000000000ffffffffffffff XMM08=20666f207265626d756e2078614d2023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85d3e490 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffed100d9e13a7 RSP=ffff88806cf09d28 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff888016f10608 R13=ffffffff818468a3 R14=ffffffff813782f8 R15=ffff88800da17480 RIP=ffffffff812d8a53 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 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=00007f2b7f855140 CR3=000000000c962000 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=5bd4d645f65c2e80cd4ca844a647fd8c XMM02=2c67c8bc2e329bc3000000000011ff50 XMM03=fb795ef6d65770560000000000123080 XMM04=60e2cc8b9661213c00000000000ae988 XMM05=b422992d4461f5b30000000000133c98 XMM06=4fda316b135da52b0000000000132d38 XMM07=e042d86d42eb936e0000000000123a68 XMM08=60d5dc7bb05cbfa7000000000011ffb0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000