syzkaller login: [ 38.743469] BUG: Bad rss-counter state mm:00000000b5a4044c type:MM_FILEPAGES val:33 [ 38.744909] BUG: Bad rss-counter state mm:00000000b5a4044c type:MM_ANONPAGES val:22 [ 38.904659] ================================================================== [ 38.905608] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.906560] Read of size 8 at addr ffff88801942b5c8 by task sshd/219 [ 38.907347] [ 38.907633] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.908614] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.909623] Call Trace: [ 38.909958] [ 38.910243] dump_stack_lvl+0x91/0xf0 [ 38.910750] print_report+0xcc/0x620 [ 38.911248] ? __virt_addr_valid+0x102/0x340 [ 38.911811] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.912462] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.913107] kasan_report+0xbe/0xf0 [ 38.913594] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.914247] vma_interval_tree_remove+0xc75/0xec0 [ 38.914872] vma_prepare+0xc54/0x11a0 [ 38.915374] __split_vma+0x5af/0x950 [ 38.915859] ? __pfx___split_vma+0x10/0x10 [ 38.916416] ? find_held_lock+0x2c/0x110 [ 38.916974] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.917567] ? lock_is_held_type+0x9f/0x120 [ 38.918135] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.918754] ? mtree_range_walk+0x632/0x900 [ 38.919323] ? mas_walk+0x5c7/0x7c0 [ 38.919810] do_vmi_munmap+0x1f1/0x2b0 [ 38.920335] mmap_region+0x1f9/0x2660 [ 38.920844] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.921395] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.922145] ? __pfx_lock_acquire+0x10/0x10 [ 38.922693] ? __pfx_mmap_region+0x10/0x10 [ 38.923240] ? security_mmap_addr+0x7d/0xa0 [ 38.923777] ? get_unmapped_area+0x1f5/0x3f0 [ 38.924399] do_mmap+0x854/0xf00 [ 38.924996] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.925661] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.926424] ksys_mmap_pgoff+0x3af/0x500 [ 38.927104] do_syscall_64+0x3f/0x90 [ 38.927749] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.928639] RIP: 0033:0x7f4e03cafd82 [ 38.929142] 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 [ 38.931305] RSP: 002b:00007ffc02109a88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.932263] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4e03cafd82 [ 38.933145] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4e030e9000 [ 38.934048] RBP: 00007f4e030e9000 R08: 0000000000000009 R09: 0000000000001000 [ 38.934922] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f42c5f9ec0 [ 38.935805] R13: 00007ffc02109aa0 R14: 00007ffc02109ad0 R15: 00007ffc02109e30 [ 38.936757] [ 38.937069] [ 38.937293] Allocated by task 212: [ 38.937723] kasan_save_stack+0x22/0x50 [ 38.938262] kasan_set_track+0x25/0x30 [ 38.938762] __kasan_slab_alloc+0x59/0x70 [ 38.939298] kmem_cache_alloc+0x16b/0x370 [ 38.939821] vm_area_dup+0x20/0x160 [ 38.940291] __split_vma+0x170/0x950 [ 38.940777] split_vma+0xc6/0x110 [ 38.941235] mprotect_fixup+0x8d2/0xb30 [ 38.941741] do_mprotect_pkey+0x87e/0xd40 [ 38.942291] __x64_sys_mprotect+0x78/0xc0 [ 38.942825] do_syscall_64+0x3f/0x90 [ 38.943322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.943987] [ 38.944209] Freed by task 212: [ 38.944619] kasan_save_stack+0x22/0x50 [ 38.945158] kasan_set_track+0x25/0x30 [ 38.945670] kasan_save_free_info+0x2b/0x50 [ 38.946233] __kasan_slab_free+0x10a/0x190 [ 38.946779] kmem_cache_free+0x10d/0x4d0 [ 38.947330] rcu_core+0x8c8/0x2860 [ 38.947791] __do_softirq+0x1b7/0x7d4 [ 38.948296] [ 38.948542] Last potentially related work creation: [ 38.949151] kasan_save_stack+0x22/0x50 [ 38.949657] __kasan_record_aux_stack+0x8e/0xa0 [ 38.950324] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.950995] remove_vma+0x139/0x170 [ 38.951452] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.952030] do_vmi_munmap+0x1f1/0x2b0 [ 38.952533] __vm_munmap+0x138/0x3a0 [ 38.953015] __x64_sys_munmap+0x59/0x80 [ 38.953515] do_syscall_64+0x3f/0x90 [ 38.954061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.954732] [ 38.954968] The buggy address belongs to the object at ffff88801942b570 [ 38.954968] which belongs to the cache vm_area_struct of size 168 [ 38.956524] The buggy address is located 88 bytes inside of [ 38.956524] freed 168-byte region [ffff88801942b570, ffff88801942b618) [ 38.958021] [ 38.958240] The buggy address belongs to the physical page: [ 38.958903] page:00000000b85f3cdd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1942b [ 38.960023] memcg:ffff88800c59ee01 [ 38.960462] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.961138] page_type: 0xffffffff() [ 38.961599] raw: 0100000000000200 ffff8880087a0c80 ffffea0000653d00 dead000000000002 [ 38.962584] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c59ee01 [ 38.963533] page dumped because: kasan: bad access detected [ 38.964213] [ 38.964451] Memory state around the buggy address: [ 38.965049] ffff88801942b480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.965927] ffff88801942b500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 38.966808] >ffff88801942b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.967681] ^ [ 38.968391] ffff88801942b600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.969288] ffff88801942b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.970179] ================================================================== [ 38.971212] Disabling lock debugging due to kernel taint [ 41.050651] BUG: Bad rss-counter state mm:0000000092cb8613 type:MM_FILEPAGES val:33 [ 41.051854] BUG: Bad rss-counter state mm:0000000092cb8613 type:MM_ANONPAGES val:22 [ 41.516652] BUG: Bad rss-counter state mm:00000000d15523a1 type:MM_FILEPAGES val:33 [ 41.517822] BUG: Bad rss-counter state mm:00000000d15523a1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51377' (ECDSA) to the list of known hosts. 2023/06/20 21:16:33 fuzzer started 2023/06/20 21:16:33 dialing manager at localhost:36067 2023/06/20 21:16:33 checking machine... 2023/06/20 21:16:33 checking revisions... [ 42.363806] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:16:33 testing simple program... [ 42.416747] cgroup: Unknown subsys name 'net' [ 42.452594] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:16:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff1100d9c135e RDX=dffffc0000000000 RSI=ffffffff846000aa RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130706 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 00007f3ee5ea2900 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=00007fcf1f20f650 CR3=000000000d9a8000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=e11cb250530ea9e200000000000ae988 XMM05=797b18ddbe874cd10000000000132330 XMM06=806171799158d9670000000000130db0 XMM07=fb795ef6d65770560000000000121318 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff810bd032 RDX=0000000000000bd0 RSI=0000000000000bd0 RDI=ffffffff864ec930 RBP=ffff88800c5b7930 RSP=ffff88800c5b7818 R8 =0000000000000000 R9 =ffff88800c5b7918 R10=0000000000038001 R11=0000000000006097 R12=ffff88800c5b7938 R13=ffff88800c5b7920 R14=ffff88800c5b7919 R15=ffff88800c5b78d8 RIP=ffffffff8113077a RFL=00000212 [----A--] 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 00007fcf1ec5a900 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=00007fcf1f2120b0 CR3=0000000014780000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000