syzkaller login: [ 61.831551] BUG: Bad rss-counter state mm:000000002e056e62 type:MM_FILEPAGES val:33 [ 61.833040] BUG: Bad rss-counter state mm:000000002e056e62 type:MM_ANONPAGES val:22 [ 61.974890] ================================================================== [ 61.975825] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.976787] Read of size 8 at addr ffff88801a4ae310 by task sshd/225 [ 61.977653] [ 61.977898] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.978785] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.979783] Call Trace: [ 61.980139] [ 61.980445] dump_stack_lvl+0x91/0xf0 [ 61.980945] print_report+0xcc/0x620 [ 61.981478] ? __virt_addr_valid+0x102/0x340 [ 61.982045] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.982676] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.983316] kasan_report+0xbe/0xf0 [ 61.983794] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.984453] vma_interval_tree_remove+0xc75/0xec0 [ 61.985094] vma_prepare+0xc54/0x11a0 [ 61.985613] __split_vma+0x5af/0x950 [ 61.986102] ? __pfx___split_vma+0x10/0x10 [ 61.986655] ? find_held_lock+0x2c/0x110 [ 61.987197] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.987786] ? lock_is_held_type+0x9f/0x120 [ 61.988346] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.988971] ? mtree_range_walk+0x632/0x900 [ 61.989572] ? mas_walk+0x5c7/0x7c0 [ 61.990048] do_vmi_munmap+0x1f1/0x2b0 [ 61.990573] mmap_region+0x1f9/0x2660 [ 61.991082] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.991621] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.992439] ? __pfx_lock_acquire+0x10/0x10 [ 61.992984] ? __pfx_mmap_region+0x10/0x10 [ 61.993678] ? security_mmap_addr+0x7d/0xa0 [ 61.994378] ? get_unmapped_area+0x1f5/0x3f0 [ 61.994944] do_mmap+0x854/0xf00 [ 61.995407] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.995903] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.996510] ksys_mmap_pgoff+0x3af/0x500 [ 61.997030] do_syscall_64+0x3f/0x90 [ 61.997548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.998220] RIP: 0033:0x7f353c1e1d82 [ 61.998684] 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 [ 62.000871] RSP: 002b:00007ffe09e7afd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.001848] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f353c1e1d82 [ 62.002721] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f353b61b000 [ 62.003594] RBP: 00007f353b61b000 R08: 0000000000000009 R09: 0000000000001000 [ 62.004460] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f3b514bd90 [ 62.005458] R13: 00007ffe09e7aff0 R14: 00007ffe09e7b020 R15: 00007ffe09e7b380 [ 62.006563] [ 62.006911] [ 62.007175] Allocated by task 218: [ 62.007717] kasan_save_stack+0x22/0x50 [ 62.008361] kasan_set_track+0x25/0x30 [ 62.008987] __kasan_slab_alloc+0x59/0x70 [ 62.009668] kmem_cache_alloc+0x16b/0x370 [ 62.010344] vm_area_dup+0x20/0x160 [ 62.010826] __split_vma+0x170/0x950 [ 62.011322] split_vma+0xc6/0x110 [ 62.011780] mprotect_fixup+0x8d2/0xb30 [ 62.012316] do_mprotect_pkey+0x87e/0xd40 [ 62.012850] __x64_sys_mprotect+0x78/0xc0 [ 62.013422] do_syscall_64+0x3f/0x90 [ 62.013903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.014574] [ 62.014790] Freed by task 218: [ 62.015208] kasan_save_stack+0x22/0x50 [ 62.015719] kasan_set_track+0x25/0x30 [ 62.016236] kasan_save_free_info+0x2b/0x50 [ 62.016779] __kasan_slab_free+0x10a/0x190 [ 62.017338] kmem_cache_free+0x10d/0x4d0 [ 62.017879] rcu_core+0x8c8/0x2860 [ 62.018348] __do_softirq+0x1b7/0x7d4 [ 62.018874] [ 62.019092] Last potentially related work creation: [ 62.019703] kasan_save_stack+0x22/0x50 [ 62.020230] __kasan_record_aux_stack+0x8e/0xa0 [ 62.020813] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.021490] remove_vma+0x139/0x170 [ 62.021948] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.022532] do_vmi_munmap+0x1f1/0x2b0 [ 62.023023] __vm_munmap+0x138/0x3a0 [ 62.023512] __x64_sys_munmap+0x59/0x80 [ 62.024017] do_syscall_64+0x3f/0x90 [ 62.024503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.025156] [ 62.025402] The buggy address belongs to the object at ffff88801a4ae2b8 [ 62.025402] which belongs to the cache vm_area_struct of size 168 [ 62.026938] The buggy address is located 88 bytes inside of [ 62.026938] freed 168-byte region [ffff88801a4ae2b8, ffff88801a4ae360) [ 62.028393] [ 62.028610] The buggy address belongs to the physical page: [ 62.029282] page:000000003e9e69b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a4ae [ 62.030454] memcg:ffff8880140b5501 [ 62.030887] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.031569] page_type: 0xffffffff() [ 62.032021] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 62.032970] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880140b5501 [ 62.033939] page dumped because: kasan: bad access detected [ 62.034625] [ 62.034842] Memory state around the buggy address: [ 62.035457] ffff88801a4ae200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 62.036339] ffff88801a4ae280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 62.037214] >ffff88801a4ae300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 62.038102] ^ [ 62.038584] ffff88801a4ae380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 62.039464] ffff88801a4ae400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 62.040354] ================================================================== [ 62.041307] Disabling lock debugging due to kernel taint [ 64.126907] BUG: Bad rss-counter state mm:00000000294a8e08 type:MM_FILEPAGES val:33 [ 64.127900] BUG: Bad rss-counter state mm:00000000294a8e08 type:MM_ANONPAGES val:22 [ 64.600054] BUG: Bad rss-counter state mm:0000000011b63b8b type:MM_FILEPAGES val:33 [ 64.601087] BUG: Bad rss-counter state mm:0000000011b63b8b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9239' (ECDSA) to the list of known hosts. 2023/06/20 01:24:55 fuzzer started 2023/06/20 01:24:56 dialing manager at localhost:44161 2023/06/20 01:24:56 checking machine... 2023/06/20 01:24:56 checking revisions... [ 65.273090] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:24:56 testing simple program... [ 65.323423] cgroup: Unknown subsys name 'net' [ 65.367016] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:24:55 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=dffffc0000000000 RCX=ffffffff8140d884 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff888008ffe500 RBP=ffff888008ffe500 RSP=ffff888019f57ca8 R8 =0000000000000000 R9 =ffffed10011ffca0 R10=ffff888008ffe503 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=00000000ffffffff R15=00000000ffffffff RIP=ffffffff8140d8a8 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 00007fe198b85700 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=00007f43f8bd9360 CR3=000000000e2c2000 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=2035353a34323a3130203032206e754a XMM01=657463656e6e6f63736944203a5d3433 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3433325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a34323a3130203032 XMM08=3d656e696c646d632022656369767265 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=ffff888008c58400 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=00007f7e7af990b0 CR3=000000000e2c2000 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=34323a3130203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3433325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383930 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000