syzkaller login: [ 30.740711] BUG: Bad rss-counter state mm:000000007d46fc43 type:MM_FILEPAGES val:33 [ 30.742264] BUG: Bad rss-counter state mm:000000007d46fc43 type:MM_ANONPAGES val:22 [ 30.896760] ================================================================== [ 30.898091] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.899604] Read of size 8 at addr ffff8880167c2228 by task sshd/219 [ 30.900521] [ 30.900785] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.901847] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.903025] Call Trace: [ 30.903420] [ 30.903755] dump_stack_lvl+0x91/0xf0 [ 30.904345] print_report+0xcc/0x620 [ 30.904928] ? __virt_addr_valid+0x102/0x340 [ 30.905587] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.906334] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.907078] kasan_report+0xbe/0xf0 [ 30.907655] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.908397] vma_interval_tree_remove+0xc75/0xec0 [ 30.909120] vma_prepare+0xc54/0x11a0 [ 30.909692] __split_vma+0x5af/0x950 [ 30.910256] ? __pfx___split_vma+0x10/0x10 [ 30.910921] ? find_held_lock+0x2c/0x110 [ 30.911540] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.912204] ? lock_is_held_type+0x9f/0x120 [ 30.912840] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.913556] ? mtree_range_walk+0x632/0x900 [ 30.914208] ? mas_walk+0x5c7/0x7c0 [ 30.914773] do_vmi_munmap+0x1f1/0x2b0 [ 30.915354] mmap_region+0x1f9/0x2660 [ 30.915919] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.916531] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.917384] ? __pfx_lock_acquire+0x10/0x10 [ 30.918015] ? __pfx_mmap_region+0x10/0x10 [ 30.918655] ? security_mmap_addr+0x7d/0xa0 [ 30.919290] ? get_unmapped_area+0x1f5/0x3f0 [ 30.919948] do_mmap+0x854/0xf00 [ 30.920467] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.921059] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.921727] ksys_mmap_pgoff+0x3af/0x500 [ 30.922343] do_syscall_64+0x3f/0x90 [ 30.922922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.923694] RIP: 0033:0x7f638eedbd82 [ 30.924237] 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 [ 30.926790] RSP: 002b:00007fffa05bbf18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.927874] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f638eedbd82 [ 30.928796] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f638e315000 [ 30.929646] RBP: 00007f638e315000 R08: 0000000000000009 R09: 0000000000001000 [ 30.930513] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cf975a2ec0 [ 30.931368] R13: 00007fffa05bbf30 R14: 00007fffa05bbf60 R15: 00007fffa05bc2c0 [ 30.932235] [ 30.932530] [ 30.932749] Allocated by task 212: [ 30.933180] kasan_save_stack+0x22/0x50 [ 30.933685] kasan_set_track+0x25/0x30 [ 30.934187] __kasan_slab_alloc+0x59/0x70 [ 30.934736] kmem_cache_alloc+0x16b/0x370 [ 30.935265] vm_area_dup+0x20/0x160 [ 30.935731] __split_vma+0x170/0x950 [ 30.936198] split_vma+0xc6/0x110 [ 30.936635] mprotect_fixup+0x8d2/0xb30 [ 30.937144] do_mprotect_pkey+0x87e/0xd40 [ 30.937675] __x64_sys_mprotect+0x78/0xc0 [ 30.938199] do_syscall_64+0x3f/0x90 [ 30.938703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.939347] [ 30.939562] Freed by task 212: [ 30.940014] kasan_save_stack+0x22/0x50 [ 30.940533] kasan_set_track+0x25/0x30 [ 30.941045] kasan_save_free_info+0x2b/0x50 [ 30.941586] __kasan_slab_free+0x10a/0x190 [ 30.942116] kmem_cache_free+0x10d/0x4d0 [ 30.942650] rcu_core+0x8c8/0x2860 [ 30.943090] __do_softirq+0x1b7/0x7d4 [ 30.943571] [ 30.943792] Last potentially related work creation: [ 30.944391] kasan_save_stack+0x22/0x50 [ 30.944895] __kasan_record_aux_stack+0x8e/0xa0 [ 30.945467] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.946106] remove_vma+0x139/0x170 [ 30.946571] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.947131] do_vmi_munmap+0x1f1/0x2b0 [ 30.947616] __vm_munmap+0x138/0x3a0 [ 30.948079] __x64_sys_munmap+0x59/0x80 [ 30.948571] do_syscall_64+0x3f/0x90 [ 30.949041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.949693] [ 30.949915] The buggy address belongs to the object at ffff8880167c21d0 [ 30.949915] which belongs to the cache vm_area_struct of size 168 [ 30.951444] The buggy address is located 88 bytes inside of [ 30.951444] freed 168-byte region [ffff8880167c21d0, ffff8880167c2278) [ 30.952914] [ 30.953138] The buggy address belongs to the physical page: [ 30.953837] page:000000008eaa964e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167c2 [ 30.955070] memcg:ffff88801678d501 [ 30.955501] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.956156] page_type: 0xffffffff() [ 30.956622] raw: 0100000000000200 ffff8880087a0c80 ffffea0000370e00 dead000000000004 [ 30.957550] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801678d501 [ 30.958492] page dumped because: kasan: bad access detected [ 30.959173] [ 30.959389] Memory state around the buggy address: [ 30.959972] ffff8880167c2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.960851] ffff8880167c2180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.961739] >ffff8880167c2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.962645] ^ [ 30.963209] ffff8880167c2280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.964083] ffff8880167c2300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.964957] ================================================================== [ 30.965909] Disabling lock debugging due to kernel taint [ 32.884292] BUG: Bad rss-counter state mm:000000000708444c type:MM_FILEPAGES val:33 [ 32.885460] BUG: Bad rss-counter state mm:000000000708444c type:MM_ANONPAGES val:22 [ 33.292711] BUG: Bad rss-counter state mm:00000000ce867f7e type:MM_FILEPAGES val:33 [ 33.293777] BUG: Bad rss-counter state mm:00000000ce867f7e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35079' (ECDSA) to the list of known hosts. 2023/06/20 11:59:45 fuzzer started 2023/06/20 11:59:45 dialing manager at localhost:36067 2023/06/20 11:59:45 checking machine... 2023/06/20 11:59:45 checking revisions... [ 33.919725] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:59:45 testing simple program... [ 33.965031] cgroup: Unknown subsys name 'net' [ 34.007519] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:59:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015cd73d8 RCX=0000000000000001 RDX=1ffff11002b9ae8d RSI=ffffffff8366a63c RDI=ffff888015cd73e4 RBP=ffff888015cd7468 RSP=ffff888015cd72f0 R8 =0000000000000001 R9 =ffff888015cd7350 R10=0000000000038001 R11=0000000000020c57 R12=ffff888015cd73d8 R13=0000000000000000 R14=ffff888016a5b680 R15=ffff888016485d10 RIP=ffffffff813ad547 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 00007fa1b5598900 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=00007fff91b8d000 CR3=000000000e366000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fe5b1660000 CR3=000000000b8d6000 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=f1efaa9bd81105bb254fbb07f28e3de0 XMM02=0000000000118f48ec2efd57dc4c00df XMM03=0000000000120aa86594d2020830661e XMM04=991b4e0c5de785ac00000000000ae988 XMM05=8eb2f92bb9eb0e9e0000000000130b78 XMM06=4fda316b135da52b0000000000130800 XMM07=e042d86d42eb936e0000000000120d28 XMM08=6594d2020830661e0000000000118fa8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000