syzkaller login: [ 30.716378] BUG: Bad rss-counter state mm:00000000c4f92010 type:MM_FILEPAGES val:33 [ 30.717565] BUG: Bad rss-counter state mm:00000000c4f92010 type:MM_ANONPAGES val:22 [ 30.756354] ================================================================== [ 30.757036] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.757764] Read of size 8 at addr ffff88800c4856b0 by task sshd/221 [ 30.758346] [ 30.758512] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.759157] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.759901] Call Trace: [ 30.760146] [ 30.760363] dump_stack_lvl+0x91/0xf0 [ 30.760832] print_report+0xcc/0x620 [ 30.761200] ? __virt_addr_valid+0x102/0x340 [ 30.761640] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.762110] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.762579] kasan_report+0xbe/0xf0 [ 30.762956] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.763428] vma_interval_tree_remove+0xc75/0xec0 [ 30.763883] vma_prepare+0xc54/0x11a0 [ 30.764242] __split_vma+0x5af/0x950 [ 30.764599] ? __pfx___split_vma+0x10/0x10 [ 30.764998] ? find_held_lock+0x2c/0x110 [ 30.765403] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.765836] ? lock_is_held_type+0x9f/0x120 [ 30.766245] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.766702] ? mtree_range_walk+0x632/0x900 [ 30.767121] ? mas_walk+0x5c7/0x7c0 [ 30.767483] do_vmi_munmap+0x1f1/0x2b0 [ 30.767856] mmap_region+0x1f9/0x2660 [ 30.768221] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.768607] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.769150] ? __pfx_lock_acquire+0x10/0x10 [ 30.769565] ? __pfx_mmap_region+0x10/0x10 [ 30.769869] ? security_mmap_addr+0x7d/0xa0 [ 30.770169] ? get_unmapped_area+0x1f5/0x3f0 [ 30.770476] do_mmap+0x854/0xf00 [ 30.770722] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.771001] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.771316] ksys_mmap_pgoff+0x3af/0x500 [ 30.771603] do_syscall_64+0x3f/0x90 [ 30.771872] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.772240] RIP: 0033:0x7fba2177bd82 [ 30.772491] 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 [ 30.773697] RSP: 002b:00007fff95701e68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.774207] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fba2177bd82 [ 30.774683] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fba20bb5000 [ 30.775161] RBP: 00007fba20bb5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.775637] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f8585f2d90 [ 30.776109] R13: 00007fff95701e80 R14: 00007fff95701eb0 R15: 00007fff95702210 [ 30.776595] [ 30.776757] [ 30.776878] Allocated by task 214: [ 30.777116] kasan_save_stack+0x22/0x50 [ 30.777416] kasan_set_track+0x25/0x30 [ 30.777694] __kasan_slab_alloc+0x59/0x70 [ 30.777987] kmem_cache_alloc+0x16b/0x370 [ 30.778282] vm_area_dup+0x20/0x160 [ 30.778538] __split_vma+0x170/0x950 [ 30.778797] split_vma+0xc6/0x110 [ 30.779043] mprotect_fixup+0x8d2/0xb30 [ 30.779326] do_mprotect_pkey+0x87e/0xd40 [ 30.779622] __x64_sys_mprotect+0x78/0xc0 [ 30.779913] do_syscall_64+0x3f/0x90 [ 30.780180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.780541] [ 30.780662] Freed by task 19: [ 30.780879] kasan_save_stack+0x22/0x50 [ 30.781170] kasan_set_track+0x25/0x30 [ 30.781462] kasan_save_free_info+0x2b/0x50 [ 30.781763] __kasan_slab_free+0x10a/0x190 [ 30.782062] kmem_cache_free+0x10d/0x4d0 [ 30.782356] rcu_core+0x8c8/0x2860 [ 30.782610] __do_softirq+0x1b7/0x7d4 [ 30.782879] [ 30.782997] Last potentially related work creation: [ 30.783341] kasan_save_stack+0x22/0x50 [ 30.783630] __kasan_record_aux_stack+0x8e/0xa0 [ 30.783958] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.784318] remove_vma+0x139/0x170 [ 30.784571] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.784887] do_vmi_munmap+0x1f1/0x2b0 [ 30.785166] __vm_munmap+0x138/0x3a0 [ 30.785438] __x64_sys_munmap+0x59/0x80 [ 30.785720] do_syscall_64+0x3f/0x90 [ 30.785988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.786351] [ 30.786477] The buggy address belongs to the object at ffff88800c485658 [ 30.786477] which belongs to the cache vm_area_struct of size 168 [ 30.787302] The buggy address is located 88 bytes inside of [ 30.787302] freed 168-byte region [ffff88800c485658, ffff88800c485700) [ 30.788101] [ 30.788222] The buggy address belongs to the physical page: [ 30.788595] page:00000000e07b21ef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc485 [ 30.789218] memcg:ffff888008ed9801 [ 30.789470] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.789839] page_type: 0xffffffff() [ 30.790092] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.790617] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008ed9801 [ 30.791132] page dumped because: kasan: bad access detected [ 30.791508] [ 30.791626] Memory state around the buggy address: [ 30.791953] ffff88800c485580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.792438] ffff88800c485600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.792922] >ffff88800c485680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.793406] ^ [ 30.793730] ffff88800c485700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.794213] ffff88800c485780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.794704] ================================================================== [ 30.795247] Disabling lock debugging due to kernel taint [ 32.887771] BUG: Bad rss-counter state mm:000000005fbd77eb type:MM_FILEPAGES val:33 [ 32.888506] BUG: Bad rss-counter state mm:000000005fbd77eb type:MM_ANONPAGES val:22 [ 33.390947] BUG: Bad rss-counter state mm:00000000c9fc2479 type:MM_FILEPAGES val:33 [ 33.391985] BUG: Bad rss-counter state mm:00000000c9fc2479 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24322' (ECDSA) to the list of known hosts. 2023/06/21 02:33:31 fuzzer started 2023/06/21 02:33:32 dialing manager at localhost:36067 2023/06/21 02:33:32 checking machine... 2023/06/21 02:33:32 checking revisions... [ 34.078627] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:33:32 testing simple program... [ 34.128535] cgroup: Unknown subsys name 'net' [ 34.167219] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:33:31 Registers: info registers vcpu 0 RAX=ffffed10013f92c0 RBX=0000000000000200 RCX=0000000000000000 RDX=0000000000482cc0 RSI=ffff888009fc9400 RDI=0000000000000200 RBP=ffff88800844f140 RSP=ffff8880146f7678 R8 =0000000000000000 R9 =0000000000000000 R10=ffffed10013f92c0 R11=00000000000b6a61 R12=ffff888009fc9400 R13=0000000000482cc0 R14=ffffffff8366a4d9 R15=0000000000000200 RIP=ffffffff8180f56b RFL=00000202 [-------] 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 00007f638a932900 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=00007f6389d2a7a0 CR3=000000000d4f6000 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=77d27d37909ddb5900000000000ae988 XMM05=a2f7f5fe51e850530000000000132ce0 XMM06=c291bd5c70af25b90000000000131ad0 XMM07=fb795ef6d65770560000000000121d78 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff110038d7e8f RCX=ffffffff812d8f13 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88801c6bf460 R8 =0000000000000001 R9 =0000000000000000 R10=ffff88801c6bf78f R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85b76b68 R15=0000000000000000 RIP=ffffffff8180fea8 RFL=00000256 [---ZAP-] 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 00007f0c47234900 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=00007ffc7128a000 CR3=000000000d558000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000