syzkaller login: [ 31.050172] BUG: Bad rss-counter state mm:0000000003e56bc0 type:MM_FILEPAGES val:33 [ 31.051651] BUG: Bad rss-counter state mm:0000000003e56bc0 type:MM_ANONPAGES val:22 [ 31.225502] ================================================================== [ 31.226423] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.227461] Read of size 8 at addr ffff8880198b4058 by task sshd/221 [ 31.228329] [ 31.228551] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.229425] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.230437] Call Trace: [ 31.230778] [ 31.231079] dump_stack_lvl+0x91/0xf0 [ 31.231602] print_report+0xcc/0x620 [ 31.232117] ? __virt_addr_valid+0x102/0x340 [ 31.232684] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.233307] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.233928] kasan_report+0xbe/0xf0 [ 31.234414] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.235061] vma_interval_tree_remove+0xc75/0xec0 [ 31.235681] vma_prepare+0xc54/0x11a0 [ 31.236176] __split_vma+0x5af/0x950 [ 31.236656] ? __pfx___split_vma+0x10/0x10 [ 31.237219] ? find_held_lock+0x2c/0x110 [ 31.237743] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.238339] ? lock_is_held_type+0x9f/0x120 [ 31.238884] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.239534] ? mtree_range_walk+0x632/0x900 [ 31.240140] ? mas_walk+0x5c7/0x7c0 [ 31.240746] do_vmi_munmap+0x1f1/0x2b0 [ 31.241364] mmap_region+0x1f9/0x2660 [ 31.241850] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.242388] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.243135] ? __pfx_lock_acquire+0x10/0x10 [ 31.243693] ? __pfx_mmap_region+0x10/0x10 [ 31.244242] ? security_mmap_addr+0x7d/0xa0 [ 31.244786] ? get_unmapped_area+0x1f5/0x3f0 [ 31.245356] do_mmap+0x854/0xf00 [ 31.245801] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.246328] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.246906] ksys_mmap_pgoff+0x3af/0x500 [ 31.247436] do_syscall_64+0x3f/0x90 [ 31.247930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.248589] RIP: 0033:0x7f1202c67d82 [ 31.249077] 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 [ 31.251245] RSP: 002b:00007fffa7f4ce78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.252203] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1202c67d82 [ 31.253066] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f12020a1000 [ 31.253921] RBP: 00007f12020a1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.254771] R10: 0000000000000812 R11: 0000000000000206 R12: 00005629b2ef1b20 [ 31.255668] R13: 00007fffa7f4ce90 R14: 00007fffa7f4cec0 R15: 00007fffa7f4d220 [ 31.256536] [ 31.256824] [ 31.257060] Allocated by task 214: [ 31.257497] kasan_save_stack+0x22/0x50 [ 31.258150] kasan_set_track+0x25/0x30 [ 31.258759] __kasan_slab_alloc+0x59/0x70 [ 31.259432] kmem_cache_alloc+0x16b/0x370 [ 31.260127] vm_area_dup+0x20/0x160 [ 31.260688] __split_vma+0x170/0x950 [ 31.261294] split_vma+0xc6/0x110 [ 31.261842] mprotect_fixup+0x8d2/0xb30 [ 31.262472] do_mprotect_pkey+0x87e/0xd40 [ 31.263130] __x64_sys_mprotect+0x78/0xc0 [ 31.263800] do_syscall_64+0x3f/0x90 [ 31.264407] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.265236] [ 31.265503] Freed by task 214: [ 31.266000] kasan_save_stack+0x22/0x50 [ 31.266619] kasan_set_track+0x25/0x30 [ 31.267239] kasan_save_free_info+0x2b/0x50 [ 31.267954] __kasan_slab_free+0x10a/0x190 [ 31.268679] kmem_cache_free+0x10d/0x4d0 [ 31.269317] rcu_core+0x8c8/0x2860 [ 31.269853] __do_softirq+0x1b7/0x7d4 [ 31.270473] [ 31.270737] Last potentially related work creation: [ 31.271459] kasan_save_stack+0x22/0x50 [ 31.272109] __kasan_record_aux_stack+0x8e/0xa0 [ 31.272813] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.273626] remove_vma+0x139/0x170 [ 31.274203] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.274877] do_vmi_munmap+0x1f1/0x2b0 [ 31.275518] __vm_munmap+0x138/0x3a0 [ 31.276106] __x64_sys_munmap+0x59/0x80 [ 31.276717] do_syscall_64+0x3f/0x90 [ 31.277317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.278122] [ 31.278386] The buggy address belongs to the object at ffff8880198b4000 [ 31.278386] which belongs to the cache vm_area_struct of size 168 [ 31.280287] The buggy address is located 88 bytes inside of [ 31.280287] freed 168-byte region [ffff8880198b4000, ffff8880198b40a8) [ 31.282077] [ 31.282345] The buggy address belongs to the physical page: [ 31.283205] page:00000000b8d57c26 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x198b4 [ 31.284579] memcg:ffff8880194bef01 [ 31.285133] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.285959] page_type: 0xffffffff() [ 31.286512] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.287677] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880194bef01 [ 31.288824] page dumped because: kasan: bad access detected [ 31.289663] [ 31.289977] Memory state around the buggy address: [ 31.290703] ffff8880198b3f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.291793] ffff8880198b3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.292872] >ffff8880198b4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.293933] ^ [ 31.294836] ffff8880198b4080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.295957] ffff8880198b4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.297037] ================================================================== [ 31.298249] Disabling lock debugging due to kernel taint [ 33.440307] BUG: Bad rss-counter state mm:00000000b12969ec type:MM_FILEPAGES val:33 [ 33.441585] BUG: Bad rss-counter state mm:00000000b12969ec type:MM_ANONPAGES val:22 [ 33.823361] BUG: Bad rss-counter state mm:00000000d8ea6388 type:MM_FILEPAGES val:33 [ 33.824234] BUG: Bad rss-counter state mm:00000000d8ea6388 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45779' (ECDSA) to the list of known hosts. 2023/06/20 12:46:45 fuzzer started 2023/06/20 12:46:45 dialing manager at localhost:36067 2023/06/20 12:46:45 checking machine... 2023/06/20 12:46:45 checking revisions... [ 34.591967] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:46:46 testing simple program... [ 34.630277] cgroup: Unknown subsys name 'net' [ 34.667803] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:46:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff863b92cc RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801029f260 RSP=ffff88801029f198 R8 =ffffffff863b92d0 R9 =ffff88801029f248 R10=0000000000038001 R11=000000000008b8ed R12=ffff88801029f268 R13=ffff88801029f250 R14=0000000000000005 R15=ffff88801029f208 RIP=ffffffff81130b1f RFL=00000297 [--S-APC] 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 00007f12bfbd9900 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=00007f12bf054fa0 CR3=000000000c604000 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=7b3a53fa01d6f5da00000000000ae988 XMM05=35058c925b326d8a0000000000132b00 XMM06=e4cb8bb95a7664b600000000001319b8 XMM07=fb795ef6d65770560000000000121be0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1001e274f6 RBX=0000000000000001 RCX=ffffffff81847356 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff88800f13a7b0 RBP=ffffed1001e274f6 RSP=ffff8880195c7698 R8 =0000000000000001 R9 =ffffed1001e274f6 R10=ffff88800f13a7b3 R11=00000000000b6a61 R12=ffff8880158d0280 R13=0000000000000000 R14=ffff88800f13a768 R15=ffff88800f13a720 RIP=ffffffff8180f09a 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 00007fc085e2e900 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=00007fc0863e5618 CR3=0000000016d46000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000