syzkaller login: [ 30.673611] BUG: Bad rss-counter state mm:000000004a9621c9 type:MM_FILEPAGES val:33 [ 30.674888] BUG: Bad rss-counter state mm:000000004a9621c9 type:MM_ANONPAGES val:22 [ 30.713339] ================================================================== [ 30.714360] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.715312] Read of size 8 at addr ffff88801677e140 by task sshd/220 [ 30.716073] [ 30.716295] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.717170] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.718163] Call Trace: [ 30.718478] [ 30.718767] dump_stack_lvl+0x91/0xf0 [ 30.719274] print_report+0xcc/0x620 [ 30.719763] ? __virt_addr_valid+0x102/0x340 [ 30.720326] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.720942] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.721558] kasan_report+0xbe/0xf0 [ 30.722070] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.722705] vma_interval_tree_remove+0xc75/0xec0 [ 30.723310] vma_prepare+0xc54/0x11a0 [ 30.723790] __split_vma+0x5af/0x950 [ 30.724267] ? __pfx___split_vma+0x10/0x10 [ 30.724796] ? find_held_lock+0x2c/0x110 [ 30.725312] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.725875] ? lock_is_held_type+0x9f/0x120 [ 30.726427] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.727038] ? mtree_range_walk+0x632/0x900 [ 30.727586] ? mas_walk+0x5c7/0x7c0 [ 30.728064] do_vmi_munmap+0x1f1/0x2b0 [ 30.728560] mmap_region+0x1f9/0x2660 [ 30.729050] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.729596] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.730334] ? __pfx_lock_acquire+0x10/0x10 [ 30.730886] ? __pfx_mmap_region+0x10/0x10 [ 30.731432] ? security_mmap_addr+0x7d/0xa0 [ 30.731965] ? get_unmapped_area+0x1f5/0x3f0 [ 30.732509] do_mmap+0x854/0xf00 [ 30.732943] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.733433] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.733997] ksys_mmap_pgoff+0x3af/0x500 [ 30.734499] do_syscall_64+0x3f/0x90 [ 30.734977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.735620] RIP: 0033:0x7f7494836d82 [ 30.736087] 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 [ 30.738283] RSP: 002b:00007fff23b921c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.739196] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7494836d82 [ 30.740208] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7493c70000 [ 30.741059] RBP: 00007f7493c70000 R08: 0000000000000009 R09: 0000000000001000 [ 30.741904] R10: 0000000000000812 R11: 0000000000000206 R12: 000055980d2c4980 [ 30.742782] R13: 00007fff23b921e0 R14: 00007fff23b92210 R15: 00007fff23b92570 [ 30.743648] [ 30.743940] [ 30.744152] Allocated by task 213: [ 30.744584] kasan_save_stack+0x22/0x50 [ 30.745082] kasan_set_track+0x25/0x30 [ 30.745569] __kasan_slab_alloc+0x59/0x70 [ 30.746098] kmem_cache_alloc+0x16b/0x370 [ 30.746611] vm_area_dup+0x20/0x160 [ 30.747087] __split_vma+0x170/0x950 [ 30.747552] split_vma+0xc6/0x110 [ 30.747988] mprotect_fixup+0x8d2/0xb30 [ 30.748488] do_mprotect_pkey+0x87e/0xd40 [ 30.749003] __x64_sys_mprotect+0x78/0xc0 [ 30.749551] do_syscall_64+0x3f/0x90 [ 30.750061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.750701] [ 30.750915] Freed by task 213: [ 30.751304] kasan_save_stack+0x22/0x50 [ 30.751807] kasan_set_track+0x25/0x30 [ 30.752295] kasan_save_free_info+0x2b/0x50 [ 30.752820] __kasan_slab_free+0x10a/0x190 [ 30.753375] kmem_cache_free+0x10d/0x4d0 [ 30.753889] rcu_core+0x8c8/0x2860 [ 30.754334] __do_softirq+0x1b7/0x7d4 [ 30.754821] [ 30.755038] Last potentially related work creation: [ 30.755625] kasan_save_stack+0x22/0x50 [ 30.756128] __kasan_record_aux_stack+0x8e/0xa0 [ 30.756724] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.757395] remove_vma+0x139/0x170 [ 30.757854] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.758441] do_vmi_munmap+0x1f1/0x2b0 [ 30.758941] __vm_munmap+0x138/0x3a0 [ 30.759405] __x64_sys_munmap+0x59/0x80 [ 30.759901] do_syscall_64+0x3f/0x90 [ 30.760385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.761020] [ 30.761232] The buggy address belongs to the object at ffff88801677e0e8 [ 30.761232] which belongs to the cache vm_area_struct of size 168 [ 30.762704] The buggy address is located 88 bytes inside of [ 30.762704] freed 168-byte region [ffff88801677e0e8, ffff88801677e190) [ 30.764026] [ 30.764222] The buggy address belongs to the physical page: [ 30.764844] page:00000000d7ba10e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1677e [ 30.765886] memcg:ffff88801695b301 [ 30.766305] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.766941] page_type: 0xffffffff() [ 30.767358] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.768233] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801695b301 [ 30.769104] page dumped because: kasan: bad access detected [ 30.769738] [ 30.769939] Memory state around the buggy address: [ 30.770491] ffff88801677e000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.771297] ffff88801677e080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.772141] >ffff88801677e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.772956] ^ [ 30.773579] ffff88801677e180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.774390] ffff88801677e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.775189] ================================================================== [ 30.776242] Disabling lock debugging due to kernel taint [ 32.405191] BUG: Bad rss-counter state mm:0000000072bec73b type:MM_FILEPAGES val:33 [ 32.405745] BUG: Bad rss-counter state mm:0000000072bec73b type:MM_ANONPAGES val:22 [ 32.921157] BUG: Bad rss-counter state mm:00000000cc5fbb7b type:MM_FILEPAGES val:33 [ 32.922349] BUG: Bad rss-counter state mm:00000000cc5fbb7b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21647' (ECDSA) to the list of known hosts. 2023/06/20 22:03:41 fuzzer started 2023/06/20 22:03:41 dialing manager at localhost:36067 2023/06/20 22:03:41 checking machine... 2023/06/20 22:03:41 checking revisions... [ 33.567503] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:03:41 testing simple program... [ 33.613675] cgroup: Unknown subsys name 'net' [ 33.650564] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:03:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652b60 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=00007fd69d7dcdad RSP=ffff88801a167420 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007fd69d7dcdad R13=0000000000000000 R14=ffff888010343680 R15=ffff88800dc0f000 RIP=ffffffff84511dc0 RFL=00000286 [--S--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 00007fd69d19a700 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=00007fd34b598b38 CR3=0000000015e3a000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323732 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=00000000011c0000 RCX=1ffff110011c0000 RDX=1ffff110028d95e0 RSI=00000000181a8000 RDI=ffff8880146caf00 RBP=ffff8880146cae40 RSP=ffff888008e37d18 R8 =0000000000000001 R9 =ffffed10011c1cb5 R10=ffff888008e0e5af R11=0000000000000000 R12=ffff8880146cae40 R13=ffff8880193ad1c0 R14=0000000000000001 R15=ffff8880193ad101 RIP=ffffffff81143c65 RFL=00000046 [---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 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=00007ffcde2ed000 CR3=00000000181a8000 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=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