syzkaller login: [ 31.046850] BUG: Bad rss-counter state mm:00000000ab037591 type:MM_FILEPAGES val:33 [ 31.048196] BUG: Bad rss-counter state mm:00000000ab037591 type:MM_ANONPAGES val:22 [ 31.231086] ================================================================== [ 31.232329] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.233833] Read of size 8 at addr ffff88800e9ea140 by task sshd/218 [ 31.234789] [ 31.235057] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.236107] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.237104] Call Trace: [ 31.237433] [ 31.237716] dump_stack_lvl+0x91/0xf0 [ 31.238223] print_report+0xcc/0x620 [ 31.238723] ? __virt_addr_valid+0x102/0x340 [ 31.239314] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.239980] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.240626] kasan_report+0xbe/0xf0 [ 31.241124] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.241770] vma_interval_tree_remove+0xc75/0xec0 [ 31.242374] vma_prepare+0xc54/0x11a0 [ 31.242850] __split_vma+0x5af/0x950 [ 31.243356] ? __pfx___split_vma+0x10/0x10 [ 31.243888] ? find_held_lock+0x2c/0x110 [ 31.244412] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.245005] ? lock_is_held_type+0x9f/0x120 [ 31.245648] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.246461] ? mtree_range_walk+0x632/0x900 [ 31.247208] ? mas_walk+0x5c7/0x7c0 [ 31.247859] do_vmi_munmap+0x1f1/0x2b0 [ 31.248522] mmap_region+0x1f9/0x2660 [ 31.249186] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.249874] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.250829] ? __pfx_lock_acquire+0x10/0x10 [ 31.251541] ? __pfx_mmap_region+0x10/0x10 [ 31.252250] ? security_mmap_addr+0x7d/0xa0 [ 31.252972] ? get_unmapped_area+0x1f5/0x3f0 [ 31.253706] do_mmap+0x854/0xf00 [ 31.254287] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.254952] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.255712] ksys_mmap_pgoff+0x3af/0x500 [ 31.256405] do_syscall_64+0x3f/0x90 [ 31.257079] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.257950] RIP: 0033:0x7ff095493d82 [ 31.258560] 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 [ 31.261418] RSP: 002b:00007ffe93997e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.262623] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff095493d82 [ 31.263755] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff0948cd000 [ 31.264890] RBP: 00007ff0948cd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.266027] R10: 0000000000000812 R11: 0000000000000206 R12: 00005602d0235f60 [ 31.267169] R13: 00007ffe93997e60 R14: 00007ffe93997e90 R15: 00007ffe939981f0 [ 31.268327] [ 31.268717] [ 31.269034] Allocated by task 211: [ 31.269596] kasan_save_stack+0x22/0x50 [ 31.270220] kasan_set_track+0x25/0x30 [ 31.270748] __kasan_slab_alloc+0x59/0x70 [ 31.271321] kmem_cache_alloc+0x16b/0x370 [ 31.272020] vm_area_dup+0x20/0x160 [ 31.272635] __split_vma+0x170/0x950 [ 31.273278] split_vma+0xc6/0x110 [ 31.273796] mprotect_fixup+0x8d2/0xb30 [ 31.274462] do_mprotect_pkey+0x87e/0xd40 [ 31.275155] __x64_sys_mprotect+0x78/0xc0 [ 31.275795] do_syscall_64+0x3f/0x90 [ 31.276367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.277511] [ 31.277848] Freed by task 211: [ 31.278402] kasan_save_stack+0x22/0x50 [ 31.279097] kasan_set_track+0x25/0x30 [ 31.279723] kasan_save_free_info+0x2b/0x50 [ 31.280402] __kasan_slab_free+0x10a/0x190 [ 31.281085] kmem_cache_free+0x10d/0x4d0 [ 31.281610] rcu_core+0x8c8/0x2860 [ 31.282052] __do_softirq+0x1b7/0x7d4 [ 31.282546] [ 31.282759] Last potentially related work creation: [ 31.283395] kasan_save_stack+0x22/0x50 [ 31.283904] __kasan_record_aux_stack+0x8e/0xa0 [ 31.284496] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.285142] remove_vma+0x139/0x170 [ 31.285610] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.286179] do_vmi_munmap+0x1f1/0x2b0 [ 31.286825] __vm_munmap+0x138/0x3a0 [ 31.287461] __x64_sys_munmap+0x59/0x80 [ 31.288129] do_syscall_64+0x3f/0x90 [ 31.288774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.289651] [ 31.289944] The buggy address belongs to the object at ffff88800e9ea0e8 [ 31.289944] which belongs to the cache vm_area_struct of size 168 [ 31.291889] The buggy address is located 88 bytes inside of [ 31.291889] freed 168-byte region [ffff88800e9ea0e8, ffff88800e9ea190) [ 31.293675] [ 31.293967] The buggy address belongs to the physical page: [ 31.294827] page:00000000b127a186 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9ea [ 31.295931] memcg:ffff88800fdb0f01 [ 31.296413] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.297129] page_type: 0xffffffff() [ 31.297614] raw: 0100000000000200 ffff8880087a0c80 ffffea0000268400 dead000000000005 [ 31.298602] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fdb0f01 [ 31.299515] page dumped because: kasan: bad access detected [ 31.300172] [ 31.300388] Memory state around the buggy address: [ 31.300978] ffff88800e9ea000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.301860] ffff88800e9ea080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.302710] >ffff88800e9ea100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.303582] ^ [ 31.304214] ffff88800e9ea180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.305081] ffff88800e9ea200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.305921] ================================================================== [ 31.306922] Disabling lock debugging due to kernel taint [ 33.313949] BUG: Bad rss-counter state mm:00000000ac39c0e4 type:MM_FILEPAGES val:33 [ 33.315275] BUG: Bad rss-counter state mm:00000000ac39c0e4 type:MM_ANONPAGES val:22 [ 33.799251] BUG: Bad rss-counter state mm:00000000f4512281 type:MM_FILEPAGES val:33 [ 33.800418] BUG: Bad rss-counter state mm:00000000f4512281 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23349' (ECDSA) to the list of known hosts. 2023/06/20 18:23:46 fuzzer started 2023/06/20 18:23:46 dialing manager at localhost:36067 2023/06/20 18:23:46 checking machine... 2023/06/20 18:23:46 checking revisions... [ 34.585103] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:23:47 testing simple program... [ 34.632356] cgroup: Unknown subsys name 'net' [ 34.669395] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:23:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880167ef670 RCX=0000000000000001 RDX=1ffff11002cfdecf RSI=ffffffff81809add RDI=ffff8880167ef678 RBP=0000000000000004 RSP=ffff8880167ef588 R8 =0000000000000001 R9 =ffff8880167ef5e8 R10=0000000000038001 R11=0000000000020db7 R12=ffff8880167ef670 R13=0000000000000000 R14=ffff888016c1b680 R15=ffff8880099a5080 RIP=ffffffff813ad4be 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 00007f0b865a4700 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=00007f8c33c390b0 CR3=000000000ed88000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3732325b646873732036343a3332 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323931 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fc866379d40 CR3=000000000e89a000 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=af0cdfb6fd9862abbb434d06cf4fefed XMM02=000000000011a918eff9b2d0a8fce9cb XMM03=000000000011a9e82c67c8bc2e329bc3 XMM04=d5041c71d5867d9f00000000000ae988 XMM05=6dc75b8c74b5341e0000000000131760 XMM06=bdf2e299e47b49d50000000000131160 XMM07=e042d86d42eb936e0000000000121978 XMM08=8a5449dab2b56b95000000000011a9e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000