syzkaller login: [ 31.364477] BUG: Bad rss-counter state mm:0000000044fe55f6 type:MM_FILEPAGES val:33 [ 31.365327] BUG: Bad rss-counter state mm:0000000044fe55f6 type:MM_ANONPAGES val:22 [ 31.508495] ================================================================== [ 31.509645] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.510895] Read of size 8 at addr ffff888019fff5c8 by task sshd/220 [ 31.511776] [ 31.511996] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.512911] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.513936] Call Trace: [ 31.514256] <TASK> [ 31.514565] dump_stack_lvl+0x91/0xf0 [ 31.515081] print_report+0xcc/0x620 [ 31.515579] ? __virt_addr_valid+0x102/0x340 [ 31.516136] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.516776] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.517403] kasan_report+0xbe/0xf0 [ 31.517886] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.518552] vma_interval_tree_remove+0xc75/0xec0 [ 31.519207] vma_prepare+0xc54/0x11a0 [ 31.519710] __split_vma+0x5af/0x950 [ 31.520204] ? __pfx___split_vma+0x10/0x10 [ 31.520780] ? find_held_lock+0x2c/0x110 [ 31.521317] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.521915] ? lock_is_held_type+0x9f/0x120 [ 31.522515] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.523171] ? mtree_range_walk+0x632/0x900 [ 31.523760] ? mas_walk+0x5c7/0x7c0 [ 31.524252] do_vmi_munmap+0x1f1/0x2b0 [ 31.524790] mmap_region+0x1f9/0x2660 [ 31.525303] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.525844] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.526621] ? __pfx_lock_acquire+0x10/0x10 [ 31.527190] ? __pfx_mmap_region+0x10/0x10 [ 31.527748] ? security_mmap_addr+0x7d/0xa0 [ 31.528308] ? get_unmapped_area+0x1f5/0x3f0 [ 31.528906] do_mmap+0x854/0xf00 [ 31.529361] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.529889] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.530496] ksys_mmap_pgoff+0x3af/0x500 [ 31.531047] do_syscall_64+0x3f/0x90 [ 31.531556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.532236] RIP: 0033:0x7fda1614dd82 [ 31.532742] 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 [ 31.535009] RSP: 002b:00007ffcf8b3d828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.535966] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fda1614dd82 [ 31.536886] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fda15587000 [ 31.537789] RBP: 00007fda15587000 R08: 0000000000000009 R09: 0000000000001000 [ 31.538714] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555fe08e3f70 [ 31.539607] R13: 00007ffcf8b3d840 R14: 00007ffcf8b3d870 R15: 00007ffcf8b3dbd0 [ 31.540510] </TASK> [ 31.540820] [ 31.541040] Allocated by task 213: [ 31.541490] kasan_save_stack+0x22/0x50 [ 31.542061] kasan_set_track+0x25/0x30 [ 31.542592] __kasan_slab_alloc+0x59/0x70 [ 31.543147] kmem_cache_alloc+0x16b/0x370 [ 31.543691] vm_area_dup+0x20/0x160 [ 31.544163] __split_vma+0x170/0x950 [ 31.544664] split_vma+0xc6/0x110 [ 31.545121] mprotect_fixup+0x8d2/0xb30 [ 31.545708] do_mprotect_pkey+0x87e/0xd40 [ 31.546273] __x64_sys_mprotect+0x78/0xc0 [ 31.546830] do_syscall_64+0x3f/0x90 [ 31.547351] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.548029] [ 31.548255] Freed by task 19: [ 31.548656] kasan_save_stack+0x22/0x50 [ 31.549177] kasan_set_track+0x25/0x30 [ 31.549688] kasan_save_free_info+0x2b/0x50 [ 31.550256] __kasan_slab_free+0x10a/0x190 [ 31.550887] kmem_cache_free+0x10d/0x4d0 [ 31.551428] rcu_core+0x8c8/0x2860 [ 31.551890] __do_softirq+0x1b7/0x7d4 [ 31.552387] [ 31.552613] Last potentially related work creation: [ 31.553227] kasan_save_stack+0x22/0x50 [ 31.553756] __kasan_record_aux_stack+0x8e/0xa0 [ 31.554362] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.555085] remove_vma+0x139/0x170 [ 31.555558] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.556137] do_vmi_munmap+0x1f1/0x2b0 [ 31.556643] __vm_munmap+0x138/0x3a0 [ 31.557138] __x64_sys_munmap+0x59/0x80 [ 31.557657] do_syscall_64+0x3f/0x90 [ 31.558156] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.558876] [ 31.559098] The buggy address belongs to the object at ffff888019fff570 [ 31.559098] which belongs to the cache vm_area_struct of size 168 [ 31.560641] The buggy address is located 88 bytes inside of [ 31.560641] freed 168-byte region [ffff888019fff570, ffff888019fff618) [ 31.562121] [ 31.562345] The buggy address belongs to the physical page: [ 31.563104] page:0000000002f15918 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19fff [ 31.564283] memcg:ffff88801a400001 [ 31.564739] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.565417] page_type: 0xffffffff() [ 31.565896] raw: 0100000000000200 ffff8880087a0c80 ffffea00005f2e00 dead000000000002 [ 31.566920] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a400001 [ 31.568013] page dumped because: kasan: bad access detected [ 31.568926] [ 31.569210] Memory state around the buggy address: [ 31.570002] ffff888019fff480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.571244] ffff888019fff500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.572583] >ffff888019fff580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.573731] ^ [ 31.574659] ffff888019fff600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.575809] ffff888019fff680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.576989] ================================================================== [ 31.578338] Disabling lock debugging due to kernel taint [ 33.791433] BUG: Bad rss-counter state mm:00000000886c4b1f type:MM_FILEPAGES val:33 [ 33.792430] BUG: Bad rss-counter state mm:00000000886c4b1f type:MM_ANONPAGES val:22 [ 34.162208] BUG: Bad rss-counter state mm:00000000c8516ae8 type:MM_FILEPAGES val:33 [ 34.163393] BUG: Bad rss-counter state mm:00000000c8516ae8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52265' (ECDSA) to the list of known hosts. 2023/06/20 11:37:14 fuzzer started 2023/06/20 11:37:14 dialing manager at localhost:36067 2023/06/20 11:37:14 checking machine... 2023/06/20 11:37:14 checking revisions... [ 34.892430] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:37:14 testing simple program... [ 34.943376] cgroup: Unknown subsys name 'net' [ 34.990880] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:37:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00005616a940feb0 RCX=00005616a942ded0 RDX=000000000000000a RSI=00007ffea4344f28 RDI=00007ffea4344f20 RBP=0000000000000027 RSP=00007ffea4344f00 R8 =00005616a943c66f R9 =00007f4083f1fbe0 R10=0000000000000100 R11=0000000000000246 R12=00005616a942ded0 R13=00007ffea4344f28 R14=00007f4083948b22 R15=00007f408396d710 RIP=00007f4083dd66d6 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f408396d900 00000000 00000000 GS =0000 0000000000000000 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=00007ffea433f000 CR3=000000001006e000 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=23232323232323232323232323232323 XMM01=ffffffffffffff00ffff000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=622073656e696c282073656e696c2074 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff845137d7 RBX=ffffffff813ad470 RCX=ffffffff864b3701 RDX=1ffff1100d9e135a RSI=ffffffff845137d7 RDI=ffff88806cf09b40 RBP=ffff88806cf09b10 RSP=ffff88806cf09a70 R8 =ffffffff864b37a6 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b546d R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800980b380 RIP=ffffffff813ad474 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 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=00007f7dfc8dd760 CR3=0000000016aa6000 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=2034313a37333a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a37333a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000