syzkaller login: [ 38.711546] BUG: Bad rss-counter state mm:00000000c16627f7 type:MM_FILEPAGES val:33 [ 38.713660] BUG: Bad rss-counter state mm:00000000c16627f7 type:MM_ANONPAGES val:22 [ 38.880045] ================================================================== [ 38.880966] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.881926] Read of size 8 at addr ffff88801685e798 by task sshd/220 [ 38.882827] [ 38.883052] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.883930] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.884944] Call Trace: [ 38.885282] [ 38.885581] dump_stack_lvl+0x91/0xf0 [ 38.886083] print_report+0xcc/0x620 [ 38.886581] ? __virt_addr_valid+0x102/0x340 [ 38.887135] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.887753] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888370] kasan_report+0xbe/0xf0 [ 38.888842] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.889493] vma_interval_tree_remove+0xc75/0xec0 [ 38.890102] vma_prepare+0xc54/0x11a0 [ 38.890575] __split_vma+0x5af/0x950 [ 38.891051] ? __pfx___split_vma+0x10/0x10 [ 38.891590] ? find_held_lock+0x2c/0x110 [ 38.892116] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.892682] ? lock_is_held_type+0x9f/0x120 [ 38.893220] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.893829] ? mtree_range_walk+0x632/0x900 [ 38.894381] ? mas_walk+0x5c7/0x7c0 [ 38.894858] do_vmi_munmap+0x1f1/0x2b0 [ 38.895347] mmap_region+0x1f9/0x2660 [ 38.895830] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.896334] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.897042] ? __pfx_lock_acquire+0x10/0x10 [ 38.897597] ? __pfx_mmap_region+0x10/0x10 [ 38.898132] ? security_mmap_addr+0x7d/0xa0 [ 38.898662] ? get_unmapped_area+0x1f5/0x3f0 [ 38.899219] do_mmap+0x854/0xf00 [ 38.899661] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.900165] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.900722] ksys_mmap_pgoff+0x3af/0x500 [ 38.901232] do_syscall_64+0x3f/0x90 [ 38.901727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.902444] RIP: 0033:0x7f3054322d82 [ 38.902966] 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 [ 38.905412] RSP: 002b:00007fffd8bd64b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.906476] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3054322d82 [ 38.907443] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f305375c000 [ 38.908392] RBP: 00007f305375c000 R08: 0000000000000009 R09: 0000000000001000 [ 38.909356] R10: 0000000000000812 R11: 0000000000000206 R12: 000055da4d838ec0 [ 38.910302] R13: 00007fffd8bd64d0 R14: 00007fffd8bd6500 R15: 00007fffd8bd6860 [ 38.911259] [ 38.911597] [ 38.911842] Allocated by task 213: [ 38.912332] kasan_save_stack+0x22/0x50 [ 38.912907] kasan_set_track+0x25/0x30 [ 38.913483] __kasan_slab_alloc+0x59/0x70 [ 38.914085] kmem_cache_alloc+0x16b/0x370 [ 38.914677] vm_area_dup+0x20/0x160 [ 38.915200] __split_vma+0x170/0x950 [ 38.915737] split_vma+0xc6/0x110 [ 38.916239] mprotect_fixup+0x8d2/0xb30 [ 38.916810] do_mprotect_pkey+0x87e/0xd40 [ 38.917416] __x64_sys_mprotect+0x78/0xc0 [ 38.918011] do_syscall_64+0x3f/0x90 [ 38.918547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.919287] [ 38.919534] Freed by task 213: [ 38.919984] kasan_save_stack+0x22/0x50 [ 38.920553] kasan_set_track+0x25/0x30 [ 38.921112] kasan_save_free_info+0x2b/0x50 [ 38.921737] __kasan_slab_free+0x10a/0x190 [ 38.922348] kmem_cache_free+0x10d/0x4d0 [ 38.922928] rcu_core+0x8c8/0x2860 [ 38.923435] __do_softirq+0x1b7/0x7d4 [ 38.923976] [ 38.924224] Last potentially related work creation: [ 38.924898] kasan_save_stack+0x22/0x50 [ 38.925479] __kasan_record_aux_stack+0x8e/0xa0 [ 38.926131] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.926866] remove_vma+0x139/0x170 [ 38.927389] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.928030] do_vmi_munmap+0x1f1/0x2b0 [ 38.928581] __vm_munmap+0x138/0x3a0 [ 38.929116] __x64_sys_munmap+0x59/0x80 [ 38.929700] do_syscall_64+0x3f/0x90 [ 38.930231] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.930956] [ 38.931198] The buggy address belongs to the object at ffff88801685e740 [ 38.931198] which belongs to the cache vm_area_struct of size 168 [ 38.932854] The buggy address is located 88 bytes inside of [ 38.932854] freed 168-byte region [ffff88801685e740, ffff88801685e7e8) [ 38.934461] [ 38.934703] The buggy address belongs to the physical page: [ 38.935451] page:000000004c4bc499 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1685e [ 38.936680] memcg:ffff8880183b1401 [ 38.937159] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.937906] page_type: 0xffffffff() [ 38.938412] raw: 0100000000000200 ffff8880087a0c80 ffffea000039b800 0000000000000004 [ 38.939445] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880183b1401 [ 38.940455] page dumped because: kasan: bad access detected [ 38.941204] [ 38.941458] Memory state around the buggy address: [ 38.942112] ffff88801685e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.943078] ffff88801685e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.944035] >ffff88801685e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.944984] ^ [ 38.945541] ffff88801685e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.946496] ffff88801685e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.947442] ================================================================== [ 38.948533] Disabling lock debugging due to kernel taint [ 41.125165] BUG: Bad rss-counter state mm:0000000061cf38b9 type:MM_FILEPAGES val:33 [ 41.126360] BUG: Bad rss-counter state mm:0000000061cf38b9 type:MM_ANONPAGES val:22 [ 41.621657] BUG: Bad rss-counter state mm:00000000c99c7949 type:MM_FILEPAGES val:33 [ 41.622832] BUG: Bad rss-counter state mm:00000000c99c7949 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59560' (ECDSA) to the list of known hosts. 2023/06/20 14:09:52 fuzzer started 2023/06/20 14:09:52 dialing manager at localhost:36067 2023/06/20 14:09:52 checking machine... 2023/06/20 14:09:52 checking revisions... [ 42.268760] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:09:53 testing simple program... [ 42.309866] cgroup: Unknown subsys name 'net' [ 42.346716] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:09:52 Registers: info registers vcpu 0 RAX=fffffbfff0f6e074 RBX=fffffbfff0f6e075 RCX=ffffffff84523b1d RDX=fffffbfff0f6e075 RSI=0000000000000008 RDI=ffffffff87b703a0 RBP=fffffbfff0f6e074 RSP=ffff88800fef78c0 R8 =0000000000000000 R9 =fffffbfff0f6e074 R10=ffffffff87b703a7 R11=656d616e74736f68 R12=dffffc0000000000 R13=ffff88801687f600 R14=ffffffff87b703a0 R15=dffffc0000000000 RIP=ffffffff8180f189 RFL=00000246 [---Z-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 00007fcb16a0d900 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=00007ffd574a7000 CR3=000000000ebc8000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09ff8 RCX=ffffffff860a1440 RDX=1ffff1100d9e1354 RSI=0000000000000000 RDI=ffff88806cf09aa0 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff860a1444 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ff8 R15=ffff88806cf09a98 RIP=ffffffff81131c83 RFL=00000246 [---Z-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 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=00007fc8ec842f00 CR3=000000000cb30000 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=3882f8b69e7c0890694382542a305d99 XMM02=2c67c8bc2e329bc3000000000011be78 XMM03=fb795ef6d65770560000000000122080 XMM04=c2d6758e2892b3f800000000000ae988 XMM05=19e9129bd510f2350000000000131be0 XMM06=4fda316b135da52b0000000000131a68 XMM07=e042d86d42eb936e0000000000122358 XMM08=92bbd0a3427fb6b1000000000011bed8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000