syzkaller login: [ 31.795653] BUG: Bad rss-counter state mm:000000001ac1018b type:MM_FILEPAGES val:33 [ 31.797147] BUG: Bad rss-counter state mm:000000001ac1018b type:MM_ANONPAGES val:22 [ 31.938867] ================================================================== [ 31.939966] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.941077] Read of size 8 at addr ffff88801a0e9b38 by task sshd/228 [ 31.942125] [ 31.942387] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.943431] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.944581] Call Trace: [ 31.944961] [ 31.945303] dump_stack_lvl+0x91/0xf0 [ 31.945889] print_report+0xcc/0x620 [ 31.946494] ? __virt_addr_valid+0x102/0x340 [ 31.947158] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.947790] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.948406] kasan_report+0xbe/0xf0 [ 31.948885] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.949512] vma_interval_tree_remove+0xc75/0xec0 [ 31.950116] vma_prepare+0xc54/0x11a0 [ 31.950610] __split_vma+0x5af/0x950 [ 31.951086] ? __pfx___split_vma+0x10/0x10 [ 31.951619] ? find_held_lock+0x2c/0x110 [ 31.952142] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.952710] ? lock_is_held_type+0x9f/0x120 [ 31.953249] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.953854] ? mtree_range_walk+0x632/0x900 [ 31.954402] ? mas_walk+0x5c7/0x7c0 [ 31.954887] do_vmi_munmap+0x1f1/0x2b0 [ 31.955391] mmap_region+0x1f9/0x2660 [ 31.955878] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.956386] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.957100] ? __pfx_lock_acquire+0x10/0x10 [ 31.957645] ? __pfx_mmap_region+0x10/0x10 [ 31.958171] ? security_mmap_addr+0x7d/0xa0 [ 31.958718] ? get_unmapped_area+0x1f5/0x3f0 [ 31.959276] do_mmap+0x854/0xf00 [ 31.959721] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.960221] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.960783] ksys_mmap_pgoff+0x3af/0x500 [ 31.961292] do_syscall_64+0x3f/0x90 [ 31.961780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.962427] RIP: 0033:0x7f4fa5e95d82 [ 31.962891] 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 [ 31.965000] RSP: 002b:00007fff2ed06cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.965903] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4fa5e95d82 [ 31.966768] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4fa52cf000 [ 31.967627] RBP: 00007f4fa52cf000 R08: 0000000000000009 R09: 0000000000001000 [ 31.968492] R10: 0000000000000812 R11: 0000000000000206 R12: 00005645814e5ec0 [ 31.969345] R13: 00007fff2ed06cf0 R14: 00007fff2ed06d20 R15: 00007fff2ed07080 [ 31.970215] [ 31.970514] [ 31.970729] Allocated by task 221: [ 31.971166] kasan_save_stack+0x22/0x50 [ 31.971671] kasan_set_track+0x25/0x30 [ 31.972161] __kasan_slab_alloc+0x59/0x70 [ 31.972692] kmem_cache_alloc+0x16b/0x370 [ 31.973205] vm_area_dup+0x20/0x160 [ 31.973663] __split_vma+0x170/0x950 [ 31.974135] split_vma+0xc6/0x110 [ 31.974593] mprotect_fixup+0x8d2/0xb30 [ 31.975101] do_mprotect_pkey+0x87e/0xd40 [ 31.975625] __x64_sys_mprotect+0x78/0xc0 [ 31.976147] do_syscall_64+0x3f/0x90 [ 31.976628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.977282] [ 31.977502] Freed by task 221: [ 31.977894] kasan_save_stack+0x22/0x50 [ 31.978402] kasan_set_track+0x25/0x30 [ 31.978912] kasan_save_free_info+0x2b/0x50 [ 31.979441] __kasan_slab_free+0x10a/0x190 [ 31.979980] kmem_cache_free+0x10d/0x4d0 [ 31.980494] rcu_core+0x8c8/0x2860 [ 31.980945] __do_softirq+0x1b7/0x7d4 [ 31.981424] [ 31.981639] Last potentially related work creation: [ 31.982225] kasan_save_stack+0x22/0x50 [ 31.982745] __kasan_record_aux_stack+0x8e/0xa0 [ 31.983404] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.984053] remove_vma+0x139/0x170 [ 31.984516] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.985076] do_vmi_munmap+0x1f1/0x2b0 [ 31.985570] __vm_munmap+0x138/0x3a0 [ 31.986047] __x64_sys_munmap+0x59/0x80 [ 31.986554] do_syscall_64+0x3f/0x90 [ 31.987031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.987670] [ 31.987886] The buggy address belongs to the object at ffff88801a0e9ae0 [ 31.987886] which belongs to the cache vm_area_struct of size 168 [ 31.989355] The buggy address is located 88 bytes inside of [ 31.989355] freed 168-byte region [ffff88801a0e9ae0, ffff88801a0e9b88) [ 31.990813] [ 31.991029] The buggy address belongs to the physical page: [ 31.991692] page:00000000e461688b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0e9 [ 31.992775] memcg:ffff888018218301 [ 31.993195] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.993857] page_type: 0xffffffff() [ 31.994309] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.995226] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018218301 [ 31.996145] page dumped because: kasan: bad access detected [ 31.996800] [ 31.997017] Memory state around the buggy address: [ 31.997596] ffff88801a0e9a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.998451] ffff88801a0e9a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.999305] >ffff88801a0e9b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.000162] ^ [ 32.000773] ffff88801a0e9b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.001632] ffff88801a0e9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.002499] ================================================================== [ 32.003416] Disabling lock debugging due to kernel taint [ 34.066785] BUG: Bad rss-counter state mm:0000000055dc14ff type:MM_FILEPAGES val:33 [ 34.067705] BUG: Bad rss-counter state mm:0000000055dc14ff type:MM_ANONPAGES val:22 [ 34.598782] BUG: Bad rss-counter state mm:00000000181e852f type:MM_FILEPAGES val:33 [ 34.599997] BUG: Bad rss-counter state mm:00000000181e852f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51157' (ECDSA) to the list of known hosts. 2023/06/19 17:58:22 fuzzer started 2023/06/19 17:58:22 dialing manager at localhost:44161 2023/06/19 17:58:22 checking machine... 2023/06/19 17:58:22 checking revisions... [ 35.240795] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:58:22 testing simple program... [ 35.293848] cgroup: Unknown subsys name 'net' [ 35.330852] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:58:21 Registers: info registers vcpu 0 RAX=0000000000000064 RBX=00007fff044c8050 RCX=0000000000000000 RDX=0000000000000000 RSI=00007f59d1aa0a13 RDI=00007fff044c7f00 RBP=000000000000001c RSP=00007fff044c7f00 R8 =00000000ffffffff R9 =000000000000001c R10=0000559395316ce0 R11=0000000000000000 R12=000000000000001c R13=00007fff044c80a0 R14=0000000000000002 R15=00007fff044c7f00 RIP=00007f59d1f36650 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f59d1ac5900 00000000 00000000 GS =0000 0000000000000000 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=00007f59d207a650 CR3=000000000cb16000 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=25252525252525252525252525252525 XMM01=0000000000000000000000ffffffffff XMM02=0000000000000000000000ffffffffff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000ffffff XMM08=6f69737365735f6e65706f0000000000 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=0000559395344e58 CR3=0000000005482000 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=00007fbc939125100000560dfe202790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000