syzkaller login: [ 31.159461] BUG: Bad rss-counter state mm:0000000069086c84 type:MM_FILEPAGES val:33 [ 31.160757] BUG: Bad rss-counter state mm:0000000069086c84 type:MM_ANONPAGES val:22 [ 31.200667] ================================================================== [ 31.201626] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.202501] Read of size 8 at addr ffff88800da35ed8 by task sshd/220 [ 31.203230] [ 31.203437] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.204238] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.205145] Call Trace: [ 31.205445] [ 31.205712] dump_stack_lvl+0x91/0xf0 [ 31.206176] print_report+0xcc/0x620 [ 31.206631] ? __virt_addr_valid+0x102/0x340 [ 31.207156] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.207732] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.208312] kasan_report+0xbe/0xf0 [ 31.208761] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.209342] vma_interval_tree_remove+0xc75/0xec0 [ 31.209913] vma_prepare+0xc54/0x11a0 [ 31.210364] __split_vma+0x5af/0x950 [ 31.210810] ? __pfx___split_vma+0x10/0x10 [ 31.211332] ? find_held_lock+0x2c/0x110 [ 31.211834] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.212401] ? lock_is_held_type+0x9f/0x120 [ 31.212944] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.213548] ? mtree_range_walk+0x632/0x900 [ 31.214098] ? mas_walk+0x5c7/0x7c0 [ 31.214571] do_vmi_munmap+0x1f1/0x2b0 [ 31.215081] mmap_region+0x1f9/0x2660 [ 31.215570] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.216079] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.216785] ? __pfx_lock_acquire+0x10/0x10 [ 31.217323] ? __pfx_mmap_region+0x10/0x10 [ 31.217855] ? security_mmap_addr+0x7d/0xa0 [ 31.218390] ? get_unmapped_area+0x1f5/0x3f0 [ 31.218963] do_mmap+0x854/0xf00 [ 31.219403] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.219892] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.220458] ksys_mmap_pgoff+0x3af/0x500 [ 31.220966] do_syscall_64+0x3f/0x90 [ 31.221440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.222080] RIP: 0033:0x7f88ac650d82 [ 31.222540] 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 [ 31.224682] RSP: 002b:00007ffdd34ea628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.225600] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88ac650d82 [ 31.226458] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88aba8a000 [ 31.227313] RBP: 00007f88aba8a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.228164] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f8d3809ec0 [ 31.229014] R13: 00007ffdd34ea640 R14: 00007ffdd34ea670 R15: 00007ffdd34ea9d0 [ 31.229880] [ 31.230169] [ 31.230388] Allocated by task 213: [ 31.230841] kasan_save_stack+0x22/0x50 [ 31.231404] kasan_set_track+0x25/0x30 [ 31.231909] __kasan_slab_alloc+0x59/0x70 [ 31.232460] kmem_cache_alloc+0x16b/0x370 [ 31.233027] vm_area_dup+0x20/0x160 [ 31.233520] __split_vma+0x170/0x950 [ 31.234032] split_vma+0xc6/0x110 [ 31.234503] mprotect_fixup+0x8d2/0xb30 [ 31.235024] do_mprotect_pkey+0x87e/0xd40 [ 31.235591] __x64_sys_mprotect+0x78/0xc0 [ 31.236162] do_syscall_64+0x3f/0x90 [ 31.236681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.237387] [ 31.237624] Freed by task 213: [ 31.238055] kasan_save_stack+0x22/0x50 [ 31.238594] kasan_set_track+0x25/0x30 [ 31.239165] kasan_save_free_info+0x2b/0x50 [ 31.239742] __kasan_slab_free+0x10a/0x190 [ 31.240327] kmem_cache_free+0x10d/0x4d0 [ 31.240928] rcu_core+0x8c8/0x2860 [ 31.241397] __do_softirq+0x1b7/0x7d4 [ 31.241913] [ 31.242141] Last potentially related work creation: [ 31.242775] kasan_save_stack+0x22/0x50 [ 31.243313] __kasan_record_aux_stack+0x8e/0xa0 [ 31.243918] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.244607] remove_vma+0x139/0x170 [ 31.245090] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.245701] do_vmi_munmap+0x1f1/0x2b0 [ 31.246223] __vm_munmap+0x138/0x3a0 [ 31.246708] __x64_sys_munmap+0x59/0x80 [ 31.247259] do_syscall_64+0x3f/0x90 [ 31.247755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.248433] [ 31.248664] The buggy address belongs to the object at ffff88800da35e80 [ 31.248664] which belongs to the cache vm_area_struct of size 168 [ 31.250213] The buggy address is located 88 bytes inside of [ 31.250213] freed 168-byte region [ffff88800da35e80, ffff88800da35f28) [ 31.251686] [ 31.251920] The buggy address belongs to the physical page: [ 31.252624] page:0000000048eccc0b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda35 [ 31.253767] memcg:ffff88800ec9a101 [ 31.254229] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.254936] page_type: 0xffffffff() [ 31.255416] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.256402] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec9a101 [ 31.257354] page dumped because: kasan: bad access detected [ 31.258063] [ 31.258294] Memory state around the buggy address: [ 31.258918] ffff88800da35d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.259844] ffff88800da35e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.260737] >ffff88800da35e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.261644] ^ [ 31.262421] ffff88800da35f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.263360] ffff88800da35f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.264267] ================================================================== [ 31.265248] Disabling lock debugging due to kernel taint [ 33.979352] BUG: Bad rss-counter state mm:0000000056ada165 type:MM_FILEPAGES val:33 [ 33.980381] BUG: Bad rss-counter state mm:0000000056ada165 type:MM_ANONPAGES val:22 [ 34.474197] BUG: Bad rss-counter state mm:00000000a3014302 type:MM_FILEPAGES val:33 [ 34.475398] BUG: Bad rss-counter state mm:00000000a3014302 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38264' (ECDSA) to the list of known hosts. 2023/06/20 22:10:07 fuzzer started 2023/06/20 22:10:07 dialing manager at localhost:36067 2023/06/20 22:10:07 checking machine... 2023/06/20 22:10:07 checking revisions... [ 35.191273] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:10:08 testing simple program... [ 35.247772] cgroup: Unknown subsys name 'net' [ 35.299037] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:10:07 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fd406bbe048 CR3=00000000145e6000 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=85d1077ff990269a84426e4cdaeed7c6 XMM02=000000000011d3e8eff9b2d0a8fce9cb XMM03=000000000011d4b82c67c8bc2e329bc3 XMM04=8b006e53add138b500000000000ae988 XMM05=19e9129bd510f23500000000001319c8 XMM06=4fda316b135da52b0000000000131850 XMM07=e042d86d42eb936e0000000000121d68 XMM08=94c938446e9dd603000000000011d4b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86138e8c RDX=1ffff1100188bf2b RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800c45f9b0 RSP=ffff88800c45f8e8 R8 =ffffffff86138e90 R9 =ffff88800c45f998 R10=0000000000038001 R11=0000000000020d8f R12=ffff88800c45f9b8 R13=ffff88800c45f9a0 R14=ffff88800c45fca8 R15=ffff88800c45f958 RIP=ffffffff81131271 RFL=00000216 [----AP-] 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 00007fd189ee8900 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=00007ffdf1905000 CR3=000000000c5a4000 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=563412feff00545000000000000080fe 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