syzkaller login: [ 45.954399] BUG: Bad rss-counter state mm:000000007952d347 type:MM_FILEPAGES val:33 [ 45.955988] BUG: Bad rss-counter state mm:000000007952d347 type:MM_ANONPAGES val:22 [ 46.118833] ================================================================== [ 46.119768] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.120704] Read of size 8 at addr ffff8880164e7880 by task sshd/221 [ 46.121487] [ 46.121813] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.122681] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.123649] Call Trace: [ 46.124019] [ 46.124304] dump_stack_lvl+0x91/0xf0 [ 46.124796] print_report+0xcc/0x620 [ 46.125294] ? __virt_addr_valid+0x102/0x340 [ 46.125857] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.126474] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.127085] kasan_report+0xbe/0xf0 [ 46.127562] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.128194] vma_interval_tree_remove+0xc75/0xec0 [ 46.128793] vma_prepare+0xc54/0x11a0 [ 46.129288] __split_vma+0x5af/0x950 [ 46.129767] ? __pfx___split_vma+0x10/0x10 [ 46.130295] ? find_held_lock+0x2c/0x110 [ 46.130817] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.131379] ? lock_is_held_type+0x9f/0x120 [ 46.131914] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.132514] ? mtree_range_walk+0x632/0x900 [ 46.133074] ? mas_walk+0x5c7/0x7c0 [ 46.133558] do_vmi_munmap+0x1f1/0x2b0 [ 46.134042] mmap_region+0x1f9/0x2660 [ 46.134518] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.135032] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.135745] ? __pfx_lock_acquire+0x10/0x10 [ 46.136281] ? __pfx_mmap_region+0x10/0x10 [ 46.136808] ? security_mmap_addr+0x7d/0xa0 [ 46.137352] ? get_unmapped_area+0x1f5/0x3f0 [ 46.137908] do_mmap+0x854/0xf00 [ 46.138354] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.138843] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.139405] ksys_mmap_pgoff+0x3af/0x500 [ 46.139920] do_syscall_64+0x3f/0x90 [ 46.140399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.141051] RIP: 0033:0x7f0e2960ed82 [ 46.141519] 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 [ 46.143620] RSP: 002b:00007ffc3e570e78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.144521] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0e2960ed82 [ 46.145370] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0e28a48000 [ 46.146209] RBP: 00007f0e28a48000 R08: 0000000000000009 R09: 0000000000001000 [ 46.147043] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559ec96baec0 [ 46.147883] R13: 00007ffc3e570e90 R14: 00007ffc3e570ec0 R15: 00007ffc3e571220 [ 46.148725] [ 46.149013] [ 46.149251] Allocated by task 213: [ 46.149682] kasan_save_stack+0x22/0x50 [ 46.150189] kasan_set_track+0x25/0x30 [ 46.150682] __kasan_slab_alloc+0x59/0x70 [ 46.151206] kmem_cache_alloc+0x16b/0x370 [ 46.151720] vm_area_dup+0x20/0x160 [ 46.152173] __split_vma+0x170/0x950 [ 46.152633] split_vma+0xc6/0x110 [ 46.153074] mprotect_fixup+0x8d2/0xb30 [ 46.153591] do_mprotect_pkey+0x87e/0xd40 [ 46.154103] __x64_sys_mprotect+0x78/0xc0 [ 46.154624] do_syscall_64+0x3f/0x90 [ 46.155096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.155735] [ 46.155947] Freed by task 213: [ 46.156338] kasan_save_stack+0x22/0x50 [ 46.156837] kasan_set_track+0x25/0x30 [ 46.157350] kasan_save_free_info+0x2b/0x50 [ 46.157883] __kasan_slab_free+0x10a/0x190 [ 46.158412] kmem_cache_free+0x10d/0x4d0 [ 46.158925] rcu_core+0x8c8/0x2860 [ 46.159367] __do_softirq+0x1b7/0x7d4 [ 46.159843] [ 46.160057] Last potentially related work creation: [ 46.160638] kasan_save_stack+0x22/0x50 [ 46.161146] __kasan_record_aux_stack+0x8e/0xa0 [ 46.161716] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.162356] remove_vma+0x139/0x170 [ 46.162800] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.163352] do_vmi_munmap+0x1f1/0x2b0 [ 46.163832] __vm_munmap+0x138/0x3a0 [ 46.164298] __x64_sys_munmap+0x59/0x80 [ 46.164789] do_syscall_64+0x3f/0x90 [ 46.165268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.165903] [ 46.166116] The buggy address belongs to the object at ffff8880164e7828 [ 46.166116] which belongs to the cache vm_area_struct of size 168 [ 46.167568] The buggy address is located 88 bytes inside of [ 46.167568] freed 168-byte region [ffff8880164e7828, ffff8880164e78d0) [ 46.168964] [ 46.169194] The buggy address belongs to the physical page: [ 46.169840] page:00000000007215dd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x164e7 [ 46.170918] memcg:ffff88800ca8a501 [ 46.171347] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 46.172034] page_type: 0xffffffff() [ 46.172479] raw: 0100000000000200 ffff88800879fc80 ffffea0000593280 dead000000000005 [ 46.173400] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca8a501 [ 46.174301] page dumped because: kasan: bad access detected [ 46.174957] [ 46.175170] Memory state around the buggy address: [ 46.175750] ffff8880164e7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 46.176607] ffff8880164e7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 46.177459] >ffff8880164e7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 46.178309] ^ [ 46.178717] ffff8880164e7900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.179572] ffff8880164e7980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 46.180415] ================================================================== [ 46.181481] Disabling lock debugging due to kernel taint [ 48.123161] BUG: Bad rss-counter state mm:0000000003138e2f type:MM_FILEPAGES val:33 [ 48.124355] BUG: Bad rss-counter state mm:0000000003138e2f type:MM_ANONPAGES val:22 [ 48.563195] BUG: Bad rss-counter state mm:00000000c27ff36b type:MM_FILEPAGES val:33 [ 48.564183] BUG: Bad rss-counter state mm:00000000c27ff36b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57787' (ECDSA) to the list of known hosts. 2023/06/19 14:41:37 fuzzer started 2023/06/19 14:41:37 dialing manager at localhost:44161 2023/06/19 14:41:37 checking machine... 2023/06/19 14:41:37 checking revisions... [ 49.229708] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:41:37 testing simple program... [ 49.278672] cgroup: Unknown subsys name 'net' [ 49.313892] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:41:21 Registers: info registers vcpu 0 RAX=000000164a26fff0 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806ce28140 RDI=0000000000053285 RBP=ffff88806ce28140 RSP=ffff8880195e7e28 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ee0a2 R11=0000000000000001 R12=0000000000053285 R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff811062a5 RFL=00000012 [----A--] 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 00007f1e56aa9900 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=0000564395966bec CR3=000000000c5ba000 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=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007f4610790ae0 CR3=0000000014714000 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=2036333a31343a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a31343a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000