syzkaller login: [ 30.736806] BUG: Bad rss-counter state mm:0000000087945111 type:MM_FILEPAGES val:33 [ 30.737778] BUG: Bad rss-counter state mm:0000000087945111 type:MM_ANONPAGES val:22 [ 30.896102] ================================================================== [ 30.896975] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.897868] Read of size 8 at addr ffff88800ebd65c8 by task sshd/220 [ 30.898583] [ 30.898795] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.899757] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.900664] Call Trace: [ 30.900966] [ 30.901236] dump_stack_lvl+0x91/0xf0 [ 30.901745] print_report+0xcc/0x620 [ 30.902204] ? __virt_addr_valid+0x102/0x340 [ 30.902736] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.903317] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.903902] kasan_report+0xbe/0xf0 [ 30.904349] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.904932] vma_interval_tree_remove+0xc75/0xec0 [ 30.905511] vma_prepare+0xc54/0x11a0 [ 30.906009] __split_vma+0x5af/0x950 [ 30.906566] ? __pfx___split_vma+0x10/0x10 [ 30.907191] ? find_held_lock+0x2c/0x110 [ 30.907799] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.908458] ? lock_is_held_type+0x9f/0x120 [ 30.909094] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.909820] ? mtree_range_walk+0x632/0x900 [ 30.910472] ? mas_walk+0x5c7/0x7c0 [ 30.911030] do_vmi_munmap+0x1f1/0x2b0 [ 30.911611] mmap_region+0x1f9/0x2660 [ 30.912178] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.912781] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.913640] ? __pfx_lock_acquire+0x10/0x10 [ 30.914266] ? __pfx_mmap_region+0x10/0x10 [ 30.914892] ? security_mmap_addr+0x7d/0xa0 [ 30.915518] ? get_unmapped_area+0x1f5/0x3f0 [ 30.916165] do_mmap+0x854/0xf00 [ 30.916680] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.917261] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.917935] ksys_mmap_pgoff+0x3af/0x500 [ 30.918534] do_syscall_64+0x3f/0x90 [ 30.919101] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.919867] RIP: 0033:0x7efc00f0cd82 [ 30.920405] 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 [ 30.922935] RSP: 002b:00007ffdd58896a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.924001] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efc00f0cd82 [ 30.924998] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efc00346000 [ 30.926005] RBP: 00007efc00346000 R08: 0000000000000009 R09: 0000000000001000 [ 30.927004] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561679cbfb20 [ 30.928006] R13: 00007ffdd58896c0 R14: 00007ffdd58896f0 R15: 00007ffdd5889a50 [ 30.929017] [ 30.929366] [ 30.929619] Allocated by task 213: [ 30.930126] kasan_save_stack+0x22/0x50 [ 30.930724] kasan_set_track+0x25/0x30 [ 30.931304] __kasan_slab_alloc+0x59/0x70 [ 30.931920] kmem_cache_alloc+0x16b/0x370 [ 30.932527] vm_area_dup+0x20/0x160 [ 30.933059] __split_vma+0x170/0x950 [ 30.933621] split_vma+0xc6/0x110 [ 30.934137] mprotect_fixup+0x8d2/0xb30 [ 30.934727] do_mprotect_pkey+0x87e/0xd40 [ 30.935337] __x64_sys_mprotect+0x78/0xc0 [ 30.935950] do_syscall_64+0x3f/0x90 [ 30.936507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.937265] [ 30.937526] Freed by task 213: [ 30.937987] kasan_save_stack+0x22/0x50 [ 30.938576] kasan_set_track+0x25/0x30 [ 30.939153] kasan_save_free_info+0x2b/0x50 [ 30.939779] __kasan_slab_free+0x10a/0x190 [ 30.940403] kmem_cache_free+0x10d/0x4d0 [ 30.941087] rcu_core+0x8c8/0x2860 [ 30.941628] __do_softirq+0x1b7/0x7d4 [ 30.942191] [ 30.942444] Last potentially related work creation: [ 30.943151] kasan_save_stack+0x22/0x50 [ 30.943717] __kasan_record_aux_stack+0x8e/0xa0 [ 30.944374] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.945126] remove_vma+0x139/0x170 [ 30.945667] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.946326] do_vmi_munmap+0x1f1/0x2b0 [ 30.946899] __vm_munmap+0x138/0x3a0 [ 30.947449] __x64_sys_munmap+0x59/0x80 [ 30.948034] do_syscall_64+0x3f/0x90 [ 30.948592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.949354] [ 30.949610] Second to last potentially related work creation: [ 30.950420] kasan_save_stack+0x22/0x50 [ 30.951013] __kasan_record_aux_stack+0x8e/0xa0 [ 30.951686] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.952444] remove_vma+0x139/0x170 [ 30.952973] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.953646] do_vmi_munmap+0x1f1/0x2b0 [ 30.954218] mmap_region+0x1f9/0x2660 [ 30.954779] do_mmap+0x854/0xf00 [ 30.955312] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.955920] ksys_mmap_pgoff+0x7d/0x500 [ 30.956538] do_syscall_64+0x3f/0x90 [ 30.957129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.957944] [ 30.958216] The buggy address belongs to the object at ffff88800ebd6570 [ 30.958216] which belongs to the cache vm_area_struct of size 168 [ 30.960044] The buggy address is located 88 bytes inside of [ 30.960044] freed 168-byte region [ffff88800ebd6570, ffff88800ebd6618) [ 30.961813] [ 30.962080] The buggy address belongs to the physical page: [ 30.962895] page:0000000035dd37a0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebd6 [ 30.964241] memcg:ffff88800e0cfa01 [ 30.964770] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.965586] page_type: 0xffffffff() [ 30.966146] raw: 0100000000000200 ffff8880087a0c80 ffffea000037b1c0 dead000000000008 [ 30.967289] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0cfa01 [ 30.968428] page dumped because: kasan: bad access detected [ 30.969252] [ 30.969532] Memory state around the buggy address: [ 30.970253] ffff88800ebd6480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.971320] ffff88800ebd6500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.972391] >ffff88800ebd6580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.973476] ^ [ 30.974311] ffff88800ebd6600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.975380] ffff88800ebd6680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.976447] ================================================================== [ 30.977780] Disabling lock debugging due to kernel taint [ 32.930590] BUG: Bad rss-counter state mm:00000000af5f188a type:MM_FILEPAGES val:33 [ 32.931604] BUG: Bad rss-counter state mm:00000000af5f188a type:MM_ANONPAGES val:22 [ 33.383554] BUG: Bad rss-counter state mm:000000004cf5b96a type:MM_FILEPAGES val:33 [ 33.384303] BUG: Bad rss-counter state mm:000000004cf5b96a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37811' (ECDSA) to the list of known hosts. 2023/06/20 15:32:37 fuzzer started 2023/06/20 15:32:37 dialing manager at localhost:36067 2023/06/20 15:32:37 checking machine... 2023/06/20 15:32:37 checking revisions... [ 34.116955] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:32:37 testing simple program... [ 34.169231] cgroup: Unknown subsys name 'net' [ 34.228670] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:32:37 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11002dd6ed3 RSP=ffff888016eb7688 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff83795e77 R14=ffff888015895000 R15=0000000000000000 RIP=ffffffff812d8b2a RFL=00000202 [-------] 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 00007f4b4595d900 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=00007f4b45f14618 CR3=000000001cd94000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=ffff888008c04400 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=00007fb657d01a30 CR3=000000000e848000 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=2036333a32333a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a32333a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000