syzkaller login: [ 32.125602] BUG: Bad rss-counter state mm:00000000facf006f type:MM_FILEPAGES val:33 [ 32.126435] BUG: Bad rss-counter state mm:00000000facf006f type:MM_ANONPAGES val:22 [ 32.161156] ================================================================== [ 32.161864] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.162730] Read of size 8 at addr ffff88800c4a0968 by task sshd/221 [ 32.163357] [ 32.163572] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.164153] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.165233] Call Trace: [ 32.165450] [ 32.165643] dump_stack_lvl+0x91/0xf0 [ 32.165955] print_report+0xcc/0x620 [ 32.166320] ? __virt_addr_valid+0x102/0x340 [ 32.166673] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.167064] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.167462] kasan_report+0xbe/0xf0 [ 32.167776] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.168173] vma_interval_tree_remove+0xc75/0xec0 [ 32.168562] vma_prepare+0xc54/0x11a0 [ 32.168867] __split_vma+0x5af/0x950 [ 32.169169] ? __pfx___split_vma+0x10/0x10 [ 32.169512] ? find_held_lock+0x2c/0x110 [ 32.169848] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.170231] ? lock_is_held_type+0x9f/0x120 [ 32.170581] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.170961] ? mtree_range_walk+0x632/0x900 [ 32.171301] ? mas_walk+0x5c7/0x7c0 [ 32.171608] do_vmi_munmap+0x1f1/0x2b0 [ 32.171944] mmap_region+0x1f9/0x2660 [ 32.172260] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.172598] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.173072] ? __pfx_lock_acquire+0x10/0x10 [ 32.173419] ? __pfx_mmap_region+0x10/0x10 [ 32.173762] ? security_mmap_addr+0x7d/0xa0 [ 32.174155] ? get_unmapped_area+0x1f5/0x3f0 [ 32.174516] do_mmap+0x854/0xf00 [ 32.174811] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.175138] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.175500] ksys_mmap_pgoff+0x3af/0x500 [ 32.175841] do_syscall_64+0x3f/0x90 [ 32.176166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.176597] RIP: 0033:0x7fdea3ef0d82 [ 32.176890] 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 [ 32.178348] RSP: 002b:00007ffe31f8f1f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.178964] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdea3ef0d82 [ 32.179516] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdea332a000 [ 32.180058] RBP: 00007fdea332a000 R08: 0000000000000009 R09: 0000000000001000 [ 32.180610] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c7c09fdec0 [ 32.181137] R13: 00007ffe31f8f210 R14: 00007ffe31f8f240 R15: 00007ffe31f8f5a0 [ 32.181678] [ 32.181860] [ 32.181997] Allocated by task 214: [ 32.182309] kasan_save_stack+0x22/0x50 [ 32.182651] kasan_set_track+0x25/0x30 [ 32.182972] __kasan_slab_alloc+0x59/0x70 [ 32.183321] kmem_cache_alloc+0x16b/0x370 [ 32.183666] vm_area_dup+0x20/0x160 [ 32.183963] __split_vma+0x170/0x950 [ 32.184271] split_vma+0xc6/0x110 [ 32.184554] mprotect_fixup+0x8d2/0xb30 [ 32.184887] do_mprotect_pkey+0x87e/0xd40 [ 32.185229] __x64_sys_mprotect+0x78/0xc0 [ 32.185573] do_syscall_64+0x3f/0x90 [ 32.185878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.186349] [ 32.186485] Freed by task 203: [ 32.186745] kasan_save_stack+0x22/0x50 [ 32.187077] kasan_set_track+0x25/0x30 [ 32.187395] kasan_save_free_info+0x2b/0x50 [ 32.187738] __kasan_slab_free+0x10a/0x190 [ 32.188075] kmem_cache_free+0x10d/0x4d0 [ 32.188390] rcu_core+0x8c8/0x2860 [ 32.188674] __do_softirq+0x1b7/0x7d4 [ 32.188965] [ 32.189100] Last potentially related work creation: [ 32.189472] kasan_save_stack+0x22/0x50 [ 32.189788] __kasan_record_aux_stack+0x8e/0xa0 [ 32.190225] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.190646] remove_vma+0x139/0x170 [ 32.190983] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.191380] do_vmi_munmap+0x1f1/0x2b0 [ 32.191708] __vm_munmap+0x138/0x3a0 [ 32.192019] __x64_sys_munmap+0x59/0x80 [ 32.192358] do_syscall_64+0x3f/0x90 [ 32.192698] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.193153] [ 32.193307] The buggy address belongs to the object at ffff88800c4a0910 [ 32.193307] which belongs to the cache vm_area_struct of size 168 [ 32.194369] The buggy address is located 88 bytes inside of [ 32.194369] freed 168-byte region [ffff88800c4a0910, ffff88800c4a09b8) [ 32.195343] [ 32.195493] The buggy address belongs to the physical page: [ 32.195961] page:00000000537cfd41 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4a0 [ 32.196670] memcg:ffff888006a71801 [ 32.196933] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.197330] page_type: 0xffffffff() [ 32.197624] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.198254] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888006a71801 [ 32.198846] page dumped because: kasan: bad access detected [ 32.199280] [ 32.199412] Memory state around the buggy address: [ 32.199799] ffff88800c4a0800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.200332] ffff88800c4a0880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.200870] >ffff88800c4a0900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.201393] ^ [ 32.201900] ffff88800c4a0980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.202467] ffff88800c4a0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.203018] ================================================================== [ 32.203804] Disabling lock debugging due to kernel taint [ 33.857395] BUG: Bad rss-counter state mm:00000000f682756a type:MM_FILEPAGES val:33 [ 33.858331] BUG: Bad rss-counter state mm:00000000f682756a type:MM_ANONPAGES val:22 [ 34.235240] BUG: Bad rss-counter state mm:000000006afa930f type:MM_FILEPAGES val:33 [ 34.235920] BUG: Bad rss-counter state mm:000000006afa930f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52632' (ECDSA) to the list of known hosts. 2023/06/20 09:03:49 fuzzer started 2023/06/20 09:03:49 dialing manager at localhost:44161 2023/06/20 09:03:49 checking machine... 2023/06/20 09:03:49 checking revisions... [ 34.845971] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:03:49 testing simple program... [ 34.880749] cgroup: Unknown subsys name 'net' [ 34.921452] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:03:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888018f882b0 RCX=ffffffff818dbe80 RDX=ffff8880141d8000 RSI=0000000000000000 RDI=0000000000000006 RBP=00000000022b61f8 RSP=ffff888016bffb10 R8 =0000000000000006 R9 =00000000020cdd78 R10=00000000022b61f8 R11=0000000000000000 R12=00000000020cdd78 R13=0000000000000002 R14=0000000064916b75 R15=ffff888018f882b0 RIP=ffffffff818dbe83 RFL=00000283 [--S---C] 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 00007fe8ff2d1700 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=00007fff9becfc08 CR3=000000000977a000 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=2039343a33303a3930203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a33303a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81132ffd RDX=000000000000132f RSI=000000000000132f RDI=ffffffff864ec87c RBP=ffff8880142bfa40 RSP=ffff8880142bf928 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000038001 R11=00000000000b6996 R12=ffff8880142bfa48 R13=ffff8880142bfa30 R14=ffff8880142bfa29 R15=ffff8880142bf9e8 RIP=ffffffff8113077a RFL=00000217 [----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 00007f5405736900 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=00007f545d8b1650 CR3=0000000013662000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=61113573dced7db200000000000ae988 XMM05=cee9362378fccb4600000000001349e0 XMM06=e4cb8bb95a7664b60000000000133878 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000