syzkaller login: [ 30.150025] BUG: Bad rss-counter state mm:00000000787c0167 type:MM_FILEPAGES val:33 [ 30.151038] BUG: Bad rss-counter state mm:00000000787c0167 type:MM_ANONPAGES val:22 [ 30.309130] ================================================================== [ 30.310003] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.310876] Read of size 8 at addr ffff88801865c5c8 by task sshd/220 [ 30.311599] [ 30.311929] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.312744] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.313649] Call Trace: [ 30.313949] <TASK> [ 30.314222] dump_stack_lvl+0x91/0xf0 [ 30.314681] print_report+0xcc/0x620 [ 30.315164] ? __virt_addr_valid+0x102/0x340 [ 30.315683] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.316264] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.316840] kasan_report+0xbe/0xf0 [ 30.317288] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.317868] vma_interval_tree_remove+0xc75/0xec0 [ 30.318432] vma_prepare+0xc54/0x11a0 [ 30.318883] __split_vma+0x5af/0x950 [ 30.319333] ? __pfx___split_vma+0x10/0x10 [ 30.319883] ? find_held_lock+0x2c/0x110 [ 30.320410] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.320981] ? lock_is_held_type+0x9f/0x120 [ 30.321535] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.322147] ? mtree_range_walk+0x632/0x900 [ 30.322713] ? mas_walk+0x5c7/0x7c0 [ 30.323197] do_vmi_munmap+0x1f1/0x2b0 [ 30.323695] mmap_region+0x1f9/0x2660 [ 30.324176] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.324686] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.325399] ? __pfx_lock_acquire+0x10/0x10 [ 30.325932] ? __pfx_mmap_region+0x10/0x10 [ 30.326456] ? security_mmap_addr+0x7d/0xa0 [ 30.326989] ? get_unmapped_area+0x1f5/0x3f0 [ 30.327551] do_mmap+0x854/0xf00 [ 30.327994] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.328488] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.329052] ksys_mmap_pgoff+0x3af/0x500 [ 30.329557] do_syscall_64+0x3f/0x90 [ 30.330034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.330674] RIP: 0033:0x7f8fea23bd82 [ 30.331138] 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 [ 30.333259] RSP: 002b:00007ffd816eeeb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.334163] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8fea23bd82 [ 30.335014] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8fe9675000 [ 30.335872] RBP: 00007f8fe9675000 R08: 0000000000000009 R09: 0000000000001000 [ 30.336735] R10: 0000000000000812 R11: 0000000000000206 R12: 000055be37767ec0 [ 30.337585] R13: 00007ffd816eeed0 R14: 00007ffd816eef00 R15: 00007ffd816ef260 [ 30.338450] </TASK> [ 30.338741] [ 30.338956] Allocated by task 213: [ 30.339412] kasan_save_stack+0x22/0x50 [ 30.339925] kasan_set_track+0x25/0x30 [ 30.340430] __kasan_slab_alloc+0x59/0x70 [ 30.340957] kmem_cache_alloc+0x16b/0x370 [ 30.341473] vm_area_dup+0x20/0x160 [ 30.341940] __split_vma+0x170/0x950 [ 30.342402] split_vma+0xc6/0x110 [ 30.342844] mprotect_fixup+0x8d2/0xb30 [ 30.343352] do_mprotect_pkey+0x87e/0xd40 [ 30.343879] __x64_sys_mprotect+0x78/0xc0 [ 30.344395] do_syscall_64+0x3f/0x90 [ 30.344870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.345514] [ 30.345730] Freed by task 210: [ 30.346129] kasan_save_stack+0x22/0x50 [ 30.346633] kasan_set_track+0x25/0x30 [ 30.347145] kasan_save_free_info+0x2b/0x50 [ 30.347676] __kasan_slab_free+0x10a/0x190 [ 30.348215] kmem_cache_free+0x10d/0x4d0 [ 30.348723] rcu_core+0x8c8/0x2860 [ 30.349164] __do_softirq+0x1b7/0x7d4 [ 30.349637] [ 30.349854] Last potentially related work creation: [ 30.350435] kasan_save_stack+0x22/0x50 [ 30.350945] __kasan_record_aux_stack+0x8e/0xa0 [ 30.351521] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.352169] remove_vma+0x139/0x170 [ 30.352624] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.353183] do_vmi_munmap+0x1f1/0x2b0 [ 30.353714] __vm_munmap+0x138/0x3a0 [ 30.354182] __x64_sys_munmap+0x59/0x80 [ 30.354680] do_syscall_64+0x3f/0x90 [ 30.355176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.355815] [ 30.356032] Second to last potentially related work creation: [ 30.356713] kasan_save_stack+0x22/0x50 [ 30.357224] __kasan_record_aux_stack+0x8e/0xa0 [ 30.357794] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.358437] remove_vma+0x139/0x170 [ 30.358884] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.359452] do_vmi_munmap+0x1f1/0x2b0 [ 30.359938] mmap_region+0x1f9/0x2660 [ 30.360415] do_mmap+0x854/0xf00 [ 30.360841] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.361326] ksys_mmap_pgoff+0x3af/0x500 [ 30.361821] do_syscall_64+0x3f/0x90 [ 30.362293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.362929] [ 30.363149] The buggy address belongs to the object at ffff88801865c570 [ 30.363149] which belongs to the cache vm_area_struct of size 168 [ 30.364604] The buggy address is located 88 bytes inside of [ 30.364604] freed 168-byte region [ffff88801865c570, ffff88801865c618) [ 30.366001] [ 30.366218] The buggy address belongs to the physical page: [ 30.366870] page:0000000063f3fcaf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1865c [ 30.367973] memcg:ffff88800f155301 [ 30.368393] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.369047] page_type: 0xffffffff() [ 30.369503] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c5580 dead000000000004 [ 30.370414] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f155301 [ 30.371325] page dumped because: kasan: bad access detected [ 30.371999] [ 30.372218] Memory state around the buggy address: [ 30.372799] ffff88801865c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.373644] ffff88801865c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.374495] >ffff88801865c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.375362] ^ [ 30.376026] ffff88801865c600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.376874] ffff88801865c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.377727] ================================================================== [ 30.378675] Disabling lock debugging due to kernel taint [ 32.255943] BUG: Bad rss-counter state mm:00000000c32eeaa5 type:MM_FILEPAGES val:33 [ 32.257213] BUG: Bad rss-counter state mm:00000000c32eeaa5 type:MM_ANONPAGES val:22 [ 32.712035] BUG: Bad rss-counter state mm:0000000035e47cb8 type:MM_FILEPAGES val:33 [ 32.713397] BUG: Bad rss-counter state mm:0000000035e47cb8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27086' (ECDSA) to the list of known hosts. 2023/06/20 22:54:21 fuzzer started 2023/06/20 22:54:22 dialing manager at localhost:36067 2023/06/20 22:54:22 checking machine... 2023/06/20 22:54:22 checking revisions... [ 33.421331] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:54:22 testing simple program... [ 33.464196] cgroup: Unknown subsys name 'net' [ 33.527955] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:54:21 Registers: info registers vcpu 0 RAX=ffffffff8186c7b0 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff8880145b8000 RSI=ffffffff811fc554 RDI=ffff88800c52ca00 RBP=ffff8880145b9400 RSP=ffff8880145c7e50 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880145b8878 R13=ffff8880145b8000 R14=0000000000000001 R15=ffff88800c52ca00 RIP=ffffffff8186c7b0 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 00007f11c8c28900 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=00007f6b4befd650 CR3=000000000c4c0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=76729c6314edb8b900000000000ae988 XMM05=3af40fd1d8950b860000000000133e60 XMM06=4fda316b135da52b0000000000132c50 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007ffd92cd8ca8 CR3=0000000015d0c000 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=2031323a34353a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a34353a3232203032 XMM08=00007f6b540112900000004f00000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000