syzkaller login: [ 31.541759] BUG: Bad rss-counter state mm:000000004e4cd921 type:MM_FILEPAGES val:33 [ 31.542870] BUG: Bad rss-counter state mm:000000004e4cd921 type:MM_ANONPAGES val:22 [ 31.581122] ================================================================== [ 31.582145] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.583221] Read of size 8 at addr ffff88800ee743f8 by task sshd/219 [ 31.583992] [ 31.584210] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.585066] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.586048] Call Trace: [ 31.586365] [ 31.586647] dump_stack_lvl+0x91/0xf0 [ 31.587143] print_report+0xcc/0x620 [ 31.587626] ? __virt_addr_valid+0x102/0x340 [ 31.588174] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.588795] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.589405] kasan_report+0xbe/0xf0 [ 31.589890] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.590505] vma_interval_tree_remove+0xc75/0xec0 [ 31.591110] vma_prepare+0xc54/0x11a0 [ 31.591590] __split_vma+0x5af/0x950 [ 31.592062] ? __pfx___split_vma+0x10/0x10 [ 31.592588] ? find_held_lock+0x2c/0x110 [ 31.593112] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.593687] ? lock_is_held_type+0x9f/0x120 [ 31.594224] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.594836] ? mtree_range_walk+0x632/0x900 [ 31.595386] ? mas_walk+0x5c7/0x7c0 [ 31.595871] do_vmi_munmap+0x1f1/0x2b0 [ 31.596364] mmap_region+0x1f9/0x2660 [ 31.596848] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.597361] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.598078] ? __pfx_lock_acquire+0x10/0x10 [ 31.598613] ? __pfx_mmap_region+0x10/0x10 [ 31.599147] ? security_mmap_addr+0x7d/0xa0 [ 31.599690] ? get_unmapped_area+0x1f5/0x3f0 [ 31.600240] do_mmap+0x854/0xf00 [ 31.600683] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.601179] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.601755] ksys_mmap_pgoff+0x3af/0x500 [ 31.602262] do_syscall_64+0x3f/0x90 [ 31.602740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.603390] RIP: 0033:0x7f80330b2d82 [ 31.603843] 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 [ 31.605975] RSP: 002b:00007fff36b72dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.606889] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f80330b2d82 [ 31.607737] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f80324ec000 [ 31.608584] RBP: 00007f80324ec000 R08: 0000000000000009 R09: 0000000000001000 [ 31.609431] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561fa0724ec0 [ 31.610291] R13: 00007fff36b72df0 R14: 00007fff36b72e20 R15: 00007fff36b73180 [ 31.611150] [ 31.611447] [ 31.611664] Allocated by task 212: [ 31.612097] kasan_save_stack+0x22/0x50 [ 31.612600] kasan_set_track+0x25/0x30 [ 31.613097] __kasan_slab_alloc+0x59/0x70 [ 31.613620] kmem_cache_alloc+0x16b/0x370 [ 31.614166] vm_area_dup+0x20/0x160 [ 31.614613] __split_vma+0x170/0x950 [ 31.615072] split_vma+0xc6/0x110 [ 31.615517] mprotect_fixup+0x8d2/0xb30 [ 31.616027] do_mprotect_pkey+0x87e/0xd40 [ 31.616543] __x64_sys_mprotect+0x78/0xc0 [ 31.617071] do_syscall_64+0x3f/0x90 [ 31.617545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.618203] [ 31.618421] Freed by task 212: [ 31.618819] kasan_save_stack+0x22/0x50 [ 31.619322] kasan_set_track+0x25/0x30 [ 31.619851] kasan_save_free_info+0x2b/0x50 [ 31.620403] __kasan_slab_free+0x10a/0x190 [ 31.620954] kmem_cache_free+0x10d/0x4d0 [ 31.621460] rcu_core+0x8c8/0x2860 [ 31.621908] __do_softirq+0x1b7/0x7d4 [ 31.622388] [ 31.622602] Last potentially related work creation: [ 31.623190] kasan_save_stack+0x22/0x50 [ 31.623688] __kasan_record_aux_stack+0x8e/0xa0 [ 31.624261] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.624899] remove_vma+0x139/0x170 [ 31.625355] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.625922] do_vmi_munmap+0x1f1/0x2b0 [ 31.626414] __vm_munmap+0x138/0x3a0 [ 31.626880] __x64_sys_munmap+0x59/0x80 [ 31.627375] do_syscall_64+0x3f/0x90 [ 31.627855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.628504] [ 31.628726] Second to last potentially related work creation: [ 31.629408] kasan_save_stack+0x22/0x50 [ 31.629917] __kasan_record_aux_stack+0x8e/0xa0 [ 31.630492] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.631129] remove_vma+0x139/0x170 [ 31.631582] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.632149] do_vmi_munmap+0x1f1/0x2b0 [ 31.632640] mmap_region+0x1f9/0x2660 [ 31.633119] do_mmap+0x854/0xf00 [ 31.633552] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.634058] ksys_mmap_pgoff+0x3af/0x500 [ 31.634557] do_syscall_64+0x3f/0x90 [ 31.635040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.635679] [ 31.635897] The buggy address belongs to the object at ffff88800ee743a0 [ 31.635897] which belongs to the cache vm_area_struct of size 168 [ 31.637378] The buggy address is located 88 bytes inside of [ 31.637378] freed 168-byte region [ffff88800ee743a0, ffff88800ee74448) [ 31.638809] [ 31.639028] The buggy address belongs to the physical page: [ 31.639684] page:00000000010f4998 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee74 [ 31.640759] memcg:ffff88800c828601 [ 31.641187] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.641848] page_type: 0xffffffff() [ 31.642302] raw: 0100000000000200 ffff8880087a0c80 ffffea00005b19c0 dead000000000002 [ 31.643219] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c828601 [ 31.644138] page dumped because: kasan: bad access detected [ 31.644797] [ 31.645018] Memory state around the buggy address: [ 31.645596] ffff88800ee74280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.646484] ffff88800ee74300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.647344] >ffff88800ee74380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.648187] ^ [ 31.649032] ffff88800ee74400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.649900] ffff88800ee74480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.650795] ================================================================== [ 31.651965] Disabling lock debugging due to kernel taint [ 34.050092] BUG: Bad rss-counter state mm:000000004736848a type:MM_FILEPAGES val:33 [ 34.051091] BUG: Bad rss-counter state mm:000000004736848a type:MM_ANONPAGES val:22 [ 34.487369] BUG: Bad rss-counter state mm:00000000ce992e2e type:MM_FILEPAGES val:33 [ 34.488630] BUG: Bad rss-counter state mm:00000000ce992e2e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46289' (ECDSA) to the list of known hosts. 2023/06/20 22:08:41 fuzzer started 2023/06/20 22:08:41 dialing manager at localhost:36067 2023/06/20 22:08:42 checking machine... 2023/06/20 22:08:42 checking revisions... [ 35.222856] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:08:42 testing simple program... [ 35.271985] cgroup: Unknown subsys name 'net' [ 35.310669] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:08:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000073 RCX=0000000000000000 RDX=ffff888014741b40 RSI=ffffffff818a281d RDI=ffff888014707790 RBP=00000003b16443fe RSP=ffff8880147075c0 R8 =0000000000000004 R9 =0000000000000002 R10=0000000000000002 R11=0000000000000001 R12=ffff88801470778c R13=e2f55236f51925a6 R14=ffff888014707750 R15=ffff888010281125 RIP=ffffffff818a344e RFL=00000293 [--S-A-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 00007feaa78a0900 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=00007feaa6d145f0 CR3=0000000009980000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=ccc106c14c74dc3200000000000ae988 XMM05=0ae99507bc94d9f70000000000133980 XMM06=3d21711b776155e80000000000132720 XMM07=fb795ef6d657705600000000001216a8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000100 RBX=ffffffff85652c60 RCX=0000000080000100 RDX=ffff8880164f1b40 RSI=ffffffff814c84af RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806cf09a00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007ff870645477 R13=0000000000000000 R14=ffff8880164f1b40 R15=ffff88800a61aa80 RIP=ffffffff814c0871 RFL=00000246 [---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 00007ff870152900 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=00007ffd8f0ae000 CR3=0000000019f56000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000