syzkaller login: [ 32.713914] BUG: Bad rss-counter state mm:0000000064364d6d type:MM_FILEPAGES val:33 [ 32.714917] BUG: Bad rss-counter state mm:0000000064364d6d type:MM_ANONPAGES val:22 [ 32.889206] ================================================================== [ 32.890136] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.891076] Read of size 8 at addr ffff8880175a9798 by task sshd/220 [ 32.891853] [ 32.892072] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.893085] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.894095] Call Trace: [ 32.894416] [ 32.894723] dump_stack_lvl+0x91/0xf0 [ 32.895233] print_report+0xcc/0x620 [ 32.895720] ? __virt_addr_valid+0x102/0x340 [ 32.896291] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.896924] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.897564] kasan_report+0xbe/0xf0 [ 32.898071] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.898717] vma_interval_tree_remove+0xc75/0xec0 [ 32.899339] vma_prepare+0xc54/0x11a0 [ 32.899843] __split_vma+0x5af/0x950 [ 32.900326] ? __pfx___split_vma+0x10/0x10 [ 32.900871] ? find_held_lock+0x2c/0x110 [ 32.901421] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.902020] ? lock_is_held_type+0x9f/0x120 [ 32.902560] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.903178] ? mtree_range_walk+0x632/0x900 [ 32.903724] ? mas_walk+0x5c7/0x7c0 [ 32.904202] do_vmi_munmap+0x1f1/0x2b0 [ 32.904705] mmap_region+0x1f9/0x2660 [ 32.905189] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.905729] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.906443] ? __pfx_lock_acquire+0x10/0x10 [ 32.906984] ? __pfx_mmap_region+0x10/0x10 [ 32.907511] ? security_mmap_addr+0x7d/0xa0 [ 32.908041] ? get_unmapped_area+0x1f5/0x3f0 [ 32.908592] do_mmap+0x854/0xf00 [ 32.909040] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.909540] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.910137] ksys_mmap_pgoff+0x3af/0x500 [ 32.910644] do_syscall_64+0x3f/0x90 [ 32.911123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.911772] RIP: 0033:0x7f7cd47abd82 [ 32.912227] 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 [ 32.914339] RSP: 002b:00007ffe744cac28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.915231] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7cd47abd82 [ 32.916084] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7cd3be5000 [ 32.916928] RBP: 00007f7cd3be5000 R08: 0000000000000009 R09: 0000000000001000 [ 32.917784] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e2ea9d3f70 [ 32.918632] R13: 00007ffe744cac40 R14: 00007ffe744cac70 R15: 00007ffe744cafd0 [ 32.919520] [ 32.919819] [ 32.920035] Allocated by task 213: [ 32.920466] kasan_save_stack+0x22/0x50 [ 32.920970] kasan_set_track+0x25/0x30 [ 32.921466] __kasan_slab_alloc+0x59/0x70 [ 32.922013] kmem_cache_alloc+0x16b/0x370 [ 32.922540] vm_area_dup+0x20/0x160 [ 32.922991] __split_vma+0x170/0x950 [ 32.923458] split_vma+0xc6/0x110 [ 32.923895] mprotect_fixup+0x8d2/0xb30 [ 32.924398] do_mprotect_pkey+0x87e/0xd40 [ 32.924919] __x64_sys_mprotect+0x78/0xc0 [ 32.925436] do_syscall_64+0x3f/0x90 [ 32.925933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.926587] [ 32.926802] Freed by task 19: [ 32.927190] kasan_save_stack+0x22/0x50 [ 32.927705] kasan_set_track+0x25/0x30 [ 32.928201] kasan_save_free_info+0x2b/0x50 [ 32.928740] __kasan_slab_free+0x10a/0x190 [ 32.929269] kmem_cache_free+0x10d/0x4d0 [ 32.929787] rcu_core+0x8c8/0x2860 [ 32.930235] __do_softirq+0x1b7/0x7d4 [ 32.930709] [ 32.930921] Last potentially related work creation: [ 32.931506] kasan_save_stack+0x22/0x50 [ 32.932014] __kasan_record_aux_stack+0x8e/0xa0 [ 32.932583] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.933226] remove_vma+0x139/0x170 [ 32.933677] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.934250] do_vmi_munmap+0x1f1/0x2b0 [ 32.934737] __vm_munmap+0x138/0x3a0 [ 32.935209] __x64_sys_munmap+0x59/0x80 [ 32.935704] do_syscall_64+0x3f/0x90 [ 32.936177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.936823] [ 32.937043] The buggy address belongs to the object at ffff8880175a9740 [ 32.937043] which belongs to the cache vm_area_struct of size 168 [ 32.938515] The buggy address is located 88 bytes inside of [ 32.938515] freed 168-byte region [ffff8880175a9740, ffff8880175a97e8) [ 32.939893] [ 32.940111] The buggy address belongs to the physical page: [ 32.940761] page:0000000077c951f0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x175a9 [ 32.941855] memcg:ffff88800f5bd701 [ 32.942283] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.942917] page_type: 0xffffffff() [ 32.943365] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.944291] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f5bd701 [ 32.945203] page dumped because: kasan: bad access detected [ 32.945891] [ 32.946109] Memory state around the buggy address: [ 32.946703] ffff8880175a9680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.947568] ffff8880175a9700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.948436] >ffff8880175a9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.949311] ^ [ 32.949828] ffff8880175a9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.950690] ffff8880175a9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.951546] ================================================================== [ 32.952921] Disabling lock debugging due to kernel taint [ 35.489278] BUG: Bad rss-counter state mm:000000002d199764 type:MM_FILEPAGES val:33 [ 35.490270] BUG: Bad rss-counter state mm:000000002d199764 type:MM_ANONPAGES val:22 [ 36.019005] BUG: Bad rss-counter state mm:00000000015efc57 type:MM_FILEPAGES val:33 [ 36.020173] BUG: Bad rss-counter state mm:00000000015efc57 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20649' (ECDSA) to the list of known hosts. 2023/06/19 23:35:51 fuzzer started 2023/06/19 23:35:51 dialing manager at localhost:44161 2023/06/19 23:35:51 checking machine... 2023/06/19 23:35:51 checking revisions... [ 36.832060] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:35:51 testing simple program... [ 36.891690] cgroup: Unknown subsys name 'net' [ 36.940445] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:35:48 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffe3de526d8 CR3=0000000005482000 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=00007f7fa91ba510000055bd46b9a790 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 info registers vcpu 1 RAX=0000000000000011 RBX=0000000000000001 RCX=ffffffff8180c521 RDX=0000000000000011 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffff888019d27578 RSP=ffff888019d27498 R8 =ffffffff86137508 R9 =ffff888019d27560 R10=0000000000038001 R11=0000000000020d8a R12=ffff888019d27580 R13=ffff888019d27568 R14=ffff888019d27561 R15=ffff888019d27520 RIP=ffffffff8112fc16 RFL=00000206 [-----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 00007f2aff824700 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=00007fa1adb80980 CR3=000000000e520000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732030353a3533 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303135 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000