syzkaller login: [ 31.057253] BUG: Bad rss-counter state mm:00000000361e7218 type:MM_FILEPAGES val:33 [ 31.058907] BUG: Bad rss-counter state mm:00000000361e7218 type:MM_ANONPAGES val:22 [ 31.234527] ================================================================== [ 31.235907] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.237037] Read of size 8 at addr ffff888018087d08 by task sshd/219 [ 31.237953] [ 31.238215] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.239244] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.240373] Call Trace: [ 31.240738] [ 31.241067] dump_stack_lvl+0x91/0xf0 [ 31.241633] print_report+0xcc/0x620 [ 31.242188] ? __virt_addr_valid+0x102/0x340 [ 31.242817] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.243543] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.244256] kasan_report+0xbe/0xf0 [ 31.244822] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.245574] vma_interval_tree_remove+0xc75/0xec0 [ 31.246298] vma_prepare+0xc54/0x11a0 [ 31.246878] __split_vma+0x5af/0x950 [ 31.247475] ? __pfx___split_vma+0x10/0x10 [ 31.248115] ? find_held_lock+0x2c/0x110 [ 31.248748] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.249426] ? lock_is_held_type+0x9f/0x120 [ 31.250077] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.250815] ? mtree_range_walk+0x632/0x900 [ 31.251497] ? mas_walk+0x5c7/0x7c0 [ 31.252074] do_vmi_munmap+0x1f1/0x2b0 [ 31.252675] mmap_region+0x1f9/0x2660 [ 31.253255] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.253871] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.254743] ? __pfx_lock_acquire+0x10/0x10 [ 31.255403] ? __pfx_mmap_region+0x10/0x10 [ 31.256033] ? security_mmap_addr+0x7d/0xa0 [ 31.256666] ? get_unmapped_area+0x1f5/0x3f0 [ 31.257322] do_mmap+0x854/0xf00 [ 31.257840] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.258428] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.259110] ksys_mmap_pgoff+0x3af/0x500 [ 31.259711] do_syscall_64+0x3f/0x90 [ 31.260283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.261047] RIP: 0033:0x7f4893080d82 [ 31.261596] 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 [ 31.264154] RSP: 002b:00007ffe05b4c338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.265233] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4893080d82 [ 31.266237] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f48924ba000 [ 31.267260] RBP: 00007f48924ba000 R08: 0000000000000009 R09: 0000000000001000 [ 31.268273] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556e10b04f70 [ 31.269280] R13: 00007ffe05b4c350 R14: 00007ffe05b4c380 R15: 00007ffe05b4c6e0 [ 31.270302] [ 31.270646] [ 31.270901] Allocated by task 212: [ 31.271416] kasan_save_stack+0x22/0x50 [ 31.272009] kasan_set_track+0x25/0x30 [ 31.272587] __kasan_slab_alloc+0x59/0x70 [ 31.273199] kmem_cache_alloc+0x16b/0x370 [ 31.273798] vm_area_dup+0x20/0x160 [ 31.274332] __split_vma+0x170/0x950 [ 31.274872] split_vma+0xc6/0x110 [ 31.275401] mprotect_fixup+0x8d2/0xb30 [ 31.275987] do_mprotect_pkey+0x87e/0xd40 [ 31.276598] __x64_sys_mprotect+0x78/0xc0 [ 31.277207] do_syscall_64+0x3f/0x90 [ 31.277759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.278513] [ 31.278765] Freed by task 202: [ 31.279253] kasan_save_stack+0x22/0x50 [ 31.279853] kasan_set_track+0x25/0x30 [ 31.280432] kasan_save_free_info+0x2b/0x50 [ 31.281054] __kasan_slab_free+0x10a/0x190 [ 31.281677] kmem_cache_free+0x10d/0x4d0 [ 31.282280] rcu_core+0x8c8/0x2860 [ 31.282800] __do_softirq+0x1b7/0x7d4 [ 31.283370] [ 31.283624] Last potentially related work creation: [ 31.284313] kasan_save_stack+0x22/0x50 [ 31.284898] __kasan_record_aux_stack+0x8e/0xa0 [ 31.285569] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.286313] remove_vma+0x139/0x170 [ 31.286833] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.287494] do_vmi_munmap+0x1f1/0x2b0 [ 31.288056] __vm_munmap+0x138/0x3a0 [ 31.288600] __x64_sys_munmap+0x59/0x80 [ 31.289171] do_syscall_64+0x3f/0x90 [ 31.289724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.290468] [ 31.290718] The buggy address belongs to the object at ffff888018087cb0 [ 31.290718] which belongs to the cache vm_area_struct of size 168 [ 31.292441] The buggy address is located 88 bytes inside of [ 31.292441] freed 168-byte region [ffff888018087cb0, ffff888018087d58) [ 31.294080] [ 31.294328] The buggy address belongs to the physical page: [ 31.295103] page:000000000611e27c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18087 [ 31.296379] memcg:ffff88800c63b701 [ 31.296877] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.297624] page_type: 0xffffffff() [ 31.298143] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.299215] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c63b701 [ 31.300276] page dumped because: kasan: bad access detected [ 31.301035] [ 31.301286] Memory state around the buggy address: [ 31.301949] ffff888018087c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.302938] ffff888018087c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.303940] >ffff888018087d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.304923] ^ [ 31.305428] ffff888018087d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.306408] ffff888018087e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.307396] ================================================================== [ 31.308611] Disabling lock debugging due to kernel taint [ 33.982500] BUG: Bad rss-counter state mm:000000006e241cc1 type:MM_FILEPAGES val:33 [ 33.983522] BUG: Bad rss-counter state mm:000000006e241cc1 type:MM_ANONPAGES val:22 [ 34.405139] BUG: Bad rss-counter state mm:0000000066bc8f0d type:MM_FILEPAGES val:33 [ 34.405900] BUG: Bad rss-counter state mm:0000000066bc8f0d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8607' (ECDSA) to the list of known hosts. 2023/06/20 23:44:12 fuzzer started 2023/06/20 23:44:13 dialing manager at localhost:36067 2023/06/20 23:44:13 checking machine... 2023/06/20 23:44:13 checking revisions... [ 34.977464] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:44:13 testing simple program... [ 35.029428] cgroup: Unknown subsys name 'net' [ 35.076813] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:44:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9c1355 RSI=ffffffff8364e0a2 RDI=ffff88806ce09a50 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=000000000008b8ed R12=ffff88806ce09b18 R13=0000000000000000 R14=ffff888016443680 R15=ffff88806ce09a50 RIP=ffffffff8113062c 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 00007fb509be0900 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=00007faa851fd650 CR3=000000000ef70000 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=e12ce1a2024d27eb00000000000ae988 XMM05=c1eefad6e3ba15230000000000134440 XMM06=806171799158d9670000000000133230 XMM07=fb795ef6d65770560000000000123588 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffcf8a11a98 CR3=0000000005482000 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=00007f240a7a7510000055a2ccaa5790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000