syzkaller login: [ 31.091012] BUG: Bad rss-counter state mm:000000005d9b027d type:MM_FILEPAGES val:33 [ 31.092212] BUG: Bad rss-counter state mm:000000005d9b027d type:MM_ANONPAGES val:22 [ 31.240608] ================================================================== [ 31.241690] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.242801] Read of size 8 at addr ffff888016a70228 by task sshd/219 [ 31.243874] [ 31.244132] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.245154] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.246286] Call Trace: [ 31.246608] [ 31.246893] dump_stack_lvl+0x91/0xf0 [ 31.247380] print_report+0xcc/0x620 [ 31.247877] ? __virt_addr_valid+0x102/0x340 [ 31.248432] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.249054] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.249677] kasan_report+0xbe/0xf0 [ 31.250153] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.250772] vma_interval_tree_remove+0xc75/0xec0 [ 31.251381] vma_prepare+0xc54/0x11a0 [ 31.251871] __split_vma+0x5af/0x950 [ 31.252342] ? __pfx___split_vma+0x10/0x10 [ 31.252870] ? find_held_lock+0x2c/0x110 [ 31.253388] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.253954] ? lock_is_held_type+0x9f/0x120 [ 31.254498] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.255101] ? mtree_range_walk+0x632/0x900 [ 31.255649] ? mas_walk+0x5c7/0x7c0 [ 31.256151] do_vmi_munmap+0x1f1/0x2b0 [ 31.256644] mmap_region+0x1f9/0x2660 [ 31.257127] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.257639] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.258361] ? __pfx_lock_acquire+0x10/0x10 [ 31.258896] ? __pfx_mmap_region+0x10/0x10 [ 31.259428] ? security_mmap_addr+0x7d/0xa0 [ 31.259961] ? get_unmapped_area+0x1f5/0x3f0 [ 31.260510] do_mmap+0x854/0xf00 [ 31.260950] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.261449] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.262012] ksys_mmap_pgoff+0x3af/0x500 [ 31.262519] do_syscall_64+0x3f/0x90 [ 31.262995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.263643] RIP: 0033:0x7f721e4e0d82 [ 31.264125] 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 [ 31.266260] RSP: 002b:00007ffe962d8c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.267174] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f721e4e0d82 [ 31.268034] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f721d91a000 [ 31.268884] RBP: 00007f721d91a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.269734] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563c2d39ad90 [ 31.270595] R13: 00007ffe962d8c20 R14: 00007ffe962d8c50 R15: 00007ffe962d8fb0 [ 31.271452] [ 31.271744] [ 31.271985] Allocated by task 212: [ 31.272421] kasan_save_stack+0x22/0x50 [ 31.272928] kasan_set_track+0x25/0x30 [ 31.273422] __kasan_slab_alloc+0x59/0x70 [ 31.273953] kmem_cache_alloc+0x16b/0x370 [ 31.274467] vm_area_dup+0x20/0x160 [ 31.274928] __split_vma+0x170/0x950 [ 31.275391] split_vma+0xc6/0x110 [ 31.275833] mprotect_fixup+0x8d2/0xb30 [ 31.276361] do_mprotect_pkey+0x87e/0xd40 [ 31.276891] __x64_sys_mprotect+0x78/0xc0 [ 31.277410] do_syscall_64+0x3f/0x90 [ 31.277888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.278529] [ 31.278744] Freed by task 212: [ 31.279140] kasan_save_stack+0x22/0x50 [ 31.279640] kasan_set_track+0x25/0x30 [ 31.280155] kasan_save_free_info+0x2b/0x50 [ 31.280688] __kasan_slab_free+0x10a/0x190 [ 31.281222] kmem_cache_free+0x10d/0x4d0 [ 31.281732] rcu_core+0x8c8/0x2860 [ 31.282175] __do_softirq+0x1b7/0x7d4 [ 31.282650] [ 31.282862] Last potentially related work creation: [ 31.283453] kasan_save_stack+0x22/0x50 [ 31.283966] __kasan_record_aux_stack+0x8e/0xa0 [ 31.284606] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.285253] remove_vma+0x139/0x170 [ 31.285712] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.286275] do_vmi_munmap+0x1f1/0x2b0 [ 31.286765] __vm_munmap+0x138/0x3a0 [ 31.287255] __x64_sys_munmap+0x59/0x80 [ 31.287751] do_syscall_64+0x3f/0x90 [ 31.288251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.288897] [ 31.289111] The buggy address belongs to the object at ffff888016a701d0 [ 31.289111] which belongs to the cache vm_area_struct of size 168 [ 31.290608] The buggy address is located 88 bytes inside of [ 31.290608] freed 168-byte region [ffff888016a701d0, ffff888016a70278) [ 31.292026] [ 31.292245] The buggy address belongs to the physical page: [ 31.292908] page:0000000003f15f2c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a70 [ 31.294010] memcg:ffff888015cbf201 [ 31.294437] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.295081] page_type: 0xffffffff() [ 31.295533] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.296469] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015cbf201 [ 31.297378] page dumped because: kasan: bad access detected [ 31.298030] [ 31.298244] Memory state around the buggy address: [ 31.298814] ffff888016a70100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.299662] ffff888016a70180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.300536] >ffff888016a70200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.301386] ^ [ 31.301938] ffff888016a70280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.302783] ffff888016a70300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.303625] ================================================================== [ 31.304534] Disabling lock debugging due to kernel taint [ 33.060082] BUG: Bad rss-counter state mm:00000000ebd779ff type:MM_FILEPAGES val:33 [ 33.060753] BUG: Bad rss-counter state mm:00000000ebd779ff type:MM_ANONPAGES val:22 [ 33.537895] BUG: Bad rss-counter state mm:0000000001411ffa type:MM_FILEPAGES val:33 [ 33.539084] BUG: Bad rss-counter state mm:0000000001411ffa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39796' (ECDSA) to the list of known hosts. 2023/06/19 14:49:24 fuzzer started 2023/06/19 14:49:24 dialing manager at localhost:44161 2023/06/19 14:49:24 checking machine... 2023/06/19 14:49:24 checking revisions... [ 34.269149] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:49:24 testing simple program... [ 34.327249] cgroup: Unknown subsys name 'net' [ 34.368289] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:49:24 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff85616740 RCX=ffffffff812e02f4 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff88806ce09dc8 RBP=1ffff1100d9c13b5 RSP=ffff88806ce09da8 R8 =0000000000000001 R9 =ffffed100d9c13b9 R10=0000000000000003 R11=0000000000000001 R12=0000000000000000 R13=0000000000000246 R14=0000000000006051 R15=ffff88806ce3a2d2 RIP=ffffffff812e0301 RFL=00000097 [--S-APC] 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 00007fb79b6df700 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=00007f9d8ccf9618 CR3=000000000beba000 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=3a5d3832325b646873732033323a3934 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343934 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=00007fec742af730 CR3=000000000976c000 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=b4d9a5cb41a4e6b550430ebc44718283 XMM02=2c67c8bc2e329bc3000000000011d340 XMM03=fb795ef6d657705600000000001248b8 XMM04=575c2444e0befe8b00000000000ae988 XMM05=dfcdbad4f1609c3700000000001343a8 XMM06=74317f3dcfe424540000000000133210 XMM07=e042d86d42eb936e0000000000124b38 XMM08=6feb2ea0491ee11d000000000011d3a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000