syzkaller login: [ 31.977957] BUG: Bad rss-counter state mm:000000006069bae3 type:MM_FILEPAGES val:33 [ 31.979798] BUG: Bad rss-counter state mm:000000006069bae3 type:MM_ANONPAGES val:22 [ 32.148478] ================================================================== [ 32.149398] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.150331] Read of size 8 at addr ffff88800cb53798 by task sshd/221 [ 32.151100] [ 32.151434] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.152290] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.153254] Call Trace: [ 32.153592] [ 32.153875] dump_stack_lvl+0x91/0xf0 [ 32.154363] print_report+0xcc/0x620 [ 32.154840] ? __virt_addr_valid+0x102/0x340 [ 32.155399] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.156013] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.156620] kasan_report+0xbe/0xf0 [ 32.157092] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.157702] vma_interval_tree_remove+0xc75/0xec0 [ 32.158294] vma_prepare+0xc54/0x11a0 [ 32.158770] __split_vma+0x5af/0x950 [ 32.159247] ? __pfx___split_vma+0x10/0x10 [ 32.159775] ? find_held_lock+0x2c/0x110 [ 32.160290] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.160846] ? lock_is_held_type+0x9f/0x120 [ 32.161378] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.161981] ? mtree_range_walk+0x632/0x900 [ 32.162526] ? mas_walk+0x5c7/0x7c0 [ 32.163012] do_vmi_munmap+0x1f1/0x2b0 [ 32.163502] mmap_region+0x1f9/0x2660 [ 32.163984] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.164493] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.165208] ? __pfx_lock_acquire+0x10/0x10 [ 32.165777] ? __pfx_mmap_region+0x10/0x10 [ 32.166364] ? security_mmap_addr+0x7d/0xa0 [ 32.166961] ? get_unmapped_area+0x1f5/0x3f0 [ 32.167572] do_mmap+0x854/0xf00 [ 32.168058] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.168610] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.169237] ksys_mmap_pgoff+0x3af/0x500 [ 32.169798] do_syscall_64+0x3f/0x90 [ 32.170327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.171045] RIP: 0033:0x7fb9d2c93d82 [ 32.171558] 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 [ 32.173907] RSP: 002b:00007ffc33de6858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.174913] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb9d2c93d82 [ 32.175877] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb9d20cd000 [ 32.176807] RBP: 00007fb9d20cd000 R08: 0000000000000009 R09: 0000000000001000 [ 32.177739] R10: 0000000000000812 R11: 0000000000000206 R12: 00005611a3e7aec0 [ 32.178673] R13: 00007ffc33de6870 R14: 00007ffc33de68a0 R15: 00007ffc33de6c00 [ 32.179627] [ 32.179950] [ 32.180188] Allocated by task 213: [ 32.180661] kasan_save_stack+0x22/0x50 [ 32.181217] kasan_set_track+0x25/0x30 [ 32.181763] __kasan_slab_alloc+0x59/0x70 [ 32.182344] kmem_cache_alloc+0x16b/0x370 [ 32.182912] vm_area_dup+0x20/0x160 [ 32.183432] __split_vma+0x170/0x950 [ 32.183949] split_vma+0xc6/0x110 [ 32.184437] mprotect_fixup+0x8d2/0xb30 [ 32.184994] do_mprotect_pkey+0x87e/0xd40 [ 32.185563] __x64_sys_mprotect+0x78/0xc0 [ 32.186138] do_syscall_64+0x3f/0x90 [ 32.186658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.187371] [ 32.187609] Freed by task 213: [ 32.188036] kasan_save_stack+0x22/0x50 [ 32.188589] kasan_set_track+0x25/0x30 [ 32.189127] kasan_save_free_info+0x2b/0x50 [ 32.189710] __kasan_slab_free+0x10a/0x190 [ 32.190295] kmem_cache_free+0x10d/0x4d0 [ 32.190850] rcu_core+0x8c8/0x2860 [ 32.191349] __do_softirq+0x1b7/0x7d4 [ 32.191872] [ 32.192108] Last potentially related work creation: [ 32.192750] kasan_save_stack+0x22/0x50 [ 32.193302] __kasan_record_aux_stack+0x8e/0xa0 [ 32.193934] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.194641] remove_vma+0x139/0x170 [ 32.195155] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.195769] do_vmi_munmap+0x1f1/0x2b0 [ 32.196301] __vm_munmap+0x138/0x3a0 [ 32.196817] __x64_sys_munmap+0x59/0x80 [ 32.197361] do_syscall_64+0x3f/0x90 [ 32.197881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.198580] [ 32.198818] Second to last potentially related work creation: [ 32.199576] kasan_save_stack+0x22/0x50 [ 32.200129] __kasan_record_aux_stack+0x8e/0xa0 [ 32.200765] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.201469] remove_vma+0x139/0x170 [ 32.201964] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.202581] do_vmi_munmap+0x1f1/0x2b0 [ 32.203135] mmap_region+0x1f9/0x2660 [ 32.203662] do_mmap+0x854/0xf00 [ 32.204141] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.204673] ksys_mmap_pgoff+0x3af/0x500 [ 32.205222] do_syscall_64+0x3f/0x90 [ 32.205739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.206455] [ 32.206691] The buggy address belongs to the object at ffff88800cb53740 [ 32.206691] which belongs to the cache vm_area_struct of size 168 [ 32.208327] The buggy address is located 88 bytes inside of [ 32.208327] freed 168-byte region [ffff88800cb53740, ffff88800cb537e8) [ 32.209867] [ 32.210101] The buggy address belongs to the physical page: [ 32.210829] page:00000000e7b698ad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb53 [ 32.212085] memcg:ffff88800c77ca01 [ 32.212581] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.213409] page_type: 0xffffffff() [ 32.213939] raw: 0100000000000200 ffff88800879fc80 ffffea000031db00 dead000000000003 [ 32.215034] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c77ca01 [ 32.216087] page dumped because: kasan: bad access detected [ 32.216865] [ 32.217111] Memory state around the buggy address: [ 32.217787] ffff88800cb53680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.218810] ffff88800cb53700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.219838] >ffff88800cb53780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.220819] ^ [ 32.221401] ffff88800cb53800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.222430] ffff88800cb53880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.223438] ================================================================== [ 32.224650] Disabling lock debugging due to kernel taint [ 34.252806] BUG: Bad rss-counter state mm:00000000a9982bf6 type:MM_FILEPAGES val:33 [ 34.253817] BUG: Bad rss-counter state mm:00000000a9982bf6 type:MM_ANONPAGES val:22 [ 34.767199] BUG: Bad rss-counter state mm:00000000cdb0bb78 type:MM_FILEPAGES val:33 [ 34.768440] BUG: Bad rss-counter state mm:00000000cdb0bb78 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42687' (ECDSA) to the list of known hosts. 2023/06/20 08:00:48 fuzzer started 2023/06/20 08:00:48 dialing manager at localhost:44161 2023/06/20 08:00:48 checking machine... 2023/06/20 08:00:48 checking revisions... [ 35.537506] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:00:48 testing simple program... [ 35.583777] cgroup: Unknown subsys name 'net' [ 35.623555] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:00:44 Registers: info registers vcpu 0 RAX=fffffbfff0ba77da RBX=fffffbfff0ba77db RCX=ffffffff812d8ec3 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88806ce09d18 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=0000000000000000 R13=0000000000000001 R14=ffffffff85616758 R15=0000000000000000 RIP=ffffffff8180eff6 RFL=00000002 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5fc010c900 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=00007f5fbf548300 CR3=000000000cd42000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d84afae0ea419c7f00000000000ae988 XMM05=8036295260c2f72600000000001364c8 XMM06=c291bd5c70af25b90000000000135568 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=000055ca88377290 CR3=000000000dba8000 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=2037343a30303a3830203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a30303a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000