syzkaller login: [ 30.453270] BUG: Bad rss-counter state mm:000000009f7fad2d type:MM_FILEPAGES val:33 [ 30.454675] BUG: Bad rss-counter state mm:000000009f7fad2d type:MM_ANONPAGES val:22 [ 30.596057] ================================================================== [ 30.596814] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.597550] Read of size 8 at addr ffff88801025cdf0 by task sshd/219 [ 30.598127] [ 30.598287] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.599089] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.599877] Call Trace: [ 30.600126] [ 30.600333] dump_stack_lvl+0x91/0xf0 [ 30.600704] print_report+0xcc/0x620 [ 30.601099] ? __virt_addr_valid+0x102/0x340 [ 30.601503] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.601954] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.602407] kasan_report+0xbe/0xf0 [ 30.602760] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.603210] vma_interval_tree_remove+0xc75/0xec0 [ 30.603659] vma_prepare+0xc54/0x11a0 [ 30.604039] __split_vma+0x5af/0x950 [ 30.604376] ? __pfx___split_vma+0x10/0x10 [ 30.604767] ? find_held_lock+0x2c/0x110 [ 30.605173] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.605606] ? lock_is_held_type+0x9f/0x120 [ 30.606039] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.606486] ? mtree_range_walk+0x632/0x900 [ 30.606898] ? mas_walk+0x5c7/0x7c0 [ 30.607251] do_vmi_munmap+0x1f1/0x2b0 [ 30.607619] mmap_region+0x1f9/0x2660 [ 30.608020] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.608397] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.608946] ? __pfx_lock_acquire+0x10/0x10 [ 30.609342] ? __pfx_mmap_region+0x10/0x10 [ 30.609727] ? security_mmap_addr+0x7d/0xa0 [ 30.610121] ? get_unmapped_area+0x1f5/0x3f0 [ 30.610530] do_mmap+0x854/0xf00 [ 30.610843] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.611201] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.611607] ksys_mmap_pgoff+0x3af/0x500 [ 30.611986] do_syscall_64+0x3f/0x90 [ 30.612345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.612856] RIP: 0033:0x7f22e7d79d82 [ 30.613242] 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 [ 30.614796] RSP: 002b:00007ffdfd776958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.615471] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22e7d79d82 [ 30.616124] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f22e71b3000 [ 30.616765] RBP: 00007f22e71b3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.617441] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560365247f70 [ 30.618076] R13: 00007ffdfd776970 R14: 00007ffdfd7769a0 R15: 00007ffdfd776d00 [ 30.618715] [ 30.618930] [ 30.619091] Allocated by task 212: [ 30.619405] kasan_save_stack+0x22/0x50 [ 30.619801] kasan_set_track+0x25/0x30 [ 30.620187] __kasan_slab_alloc+0x59/0x70 [ 30.620569] kmem_cache_alloc+0x16b/0x370 [ 30.620967] vm_area_dup+0x20/0x160 [ 30.621305] __split_vma+0x170/0x950 [ 30.621649] split_vma+0xc6/0x110 [ 30.621970] mprotect_fixup+0x8d2/0xb30 [ 30.622345] do_mprotect_pkey+0x87e/0xd40 [ 30.622720] __x64_sys_mprotect+0x78/0xc0 [ 30.623096] do_syscall_64+0x3f/0x90 [ 30.623434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.623923] [ 30.624080] Freed by task 202: [ 30.624369] kasan_save_stack+0x22/0x50 [ 30.624733] kasan_set_track+0x25/0x30 [ 30.625158] kasan_save_free_info+0x2b/0x50 [ 30.625549] __kasan_slab_free+0x10a/0x190 [ 30.625939] kmem_cache_free+0x10d/0x4d0 [ 30.626302] rcu_core+0x8c8/0x2860 [ 30.626621] __do_softirq+0x1b7/0x7d4 [ 30.626961] [ 30.627116] Last potentially related work creation: [ 30.627590] kasan_save_stack+0x22/0x50 [ 30.627974] __kasan_record_aux_stack+0x8e/0xa0 [ 30.628401] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.628930] remove_vma+0x139/0x170 [ 30.629253] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.629656] do_vmi_munmap+0x1f1/0x2b0 [ 30.630008] __vm_munmap+0x138/0x3a0 [ 30.630358] __x64_sys_munmap+0x59/0x80 [ 30.630719] do_syscall_64+0x3f/0x90 [ 30.631063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.631534] [ 30.631688] The buggy address belongs to the object at ffff88801025cd98 [ 30.631688] which belongs to the cache vm_area_struct of size 168 [ 30.632766] The buggy address is located 88 bytes inside of [ 30.632766] freed 168-byte region [ffff88801025cd98, ffff88801025ce40) [ 30.633825] [ 30.633990] The buggy address belongs to the physical page: [ 30.634457] page:00000000105d61f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1025c [ 30.635257] memcg:ffff88800d5a5501 [ 30.635546] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.635981] page_type: 0xffffffff() [ 30.636291] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.636928] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5a5501 [ 30.637540] page dumped because: kasan: bad access detected [ 30.637997] [ 30.638145] Memory state around the buggy address: [ 30.638540] ffff88801025cc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.639129] ffff88801025cd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.639703] >ffff88801025cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.640276] ^ [ 30.640850] ffff88801025ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.641434] ffff88801025ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.642056] ================================================================== [ 30.642791] Disabling lock debugging due to kernel taint [ 32.253715] BUG: Bad rss-counter state mm:00000000800bc4d6 type:MM_FILEPAGES val:33 [ 32.254476] BUG: Bad rss-counter state mm:00000000800bc4d6 type:MM_ANONPAGES val:22 [ 32.589547] BUG: Bad rss-counter state mm:00000000de7b98ab type:MM_FILEPAGES val:33 [ 32.590291] BUG: Bad rss-counter state mm:00000000de7b98ab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30050' (ECDSA) to the list of known hosts. 2023/06/21 09:13:16 fuzzer started 2023/06/21 09:13:17 dialing manager at localhost:36067 2023/06/21 09:13:17 checking machine... 2023/06/21 09:13:17 checking revisions... [ 33.163031] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:13:17 testing simple program... [ 33.209506] cgroup: Unknown subsys name 'net' [ 33.246603] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:13:16 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e18eb48 RCX=ffffffff8452a660 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800e18eb48 RBP=ffff8880158efc48 RSP=ffff8880158ef930 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=1ffff11002b1df29 R13=dffffc0000000000 R14=ffff88800e18eb48 R15=ffff8880158efc58 RIP=ffffffff8180fed8 RFL=00000282 [--S----] 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 00007fd87b02a900 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=00007ffc5f3ab758 CR3=000000000f696000 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=9cc633c8da017d8000000000000ae988 XMM05=1319e678c5640f8a00000000001324d8 XMM06=e8008b1642ea3e600000000000132440 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000013 RBX=ffff88800d845d18 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000000 RBP=ffffffff813782f8 RSP=ffff888008e37cb0 R8 =0000000000000006 R9 =0000000000000002 R10=ffffed1001b08ba2 R11=0000000000000128 R12=0000000000000000 R13=ffff88800844f780 R14=ffffffff813782f8 R15=ffff88800d845d90 RIP=ffffffff8180c68c 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 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=00007ffc1a177000 CR3=0000000019c8c000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000