[ 30.314882] BUG: Bad rss-counter state mm:00000000ea236b8d type:MM_FILEPAGES val:33 [ 30.316877] BUG: Bad rss-counter state mm:00000000ea236b8d type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.488151] ================================================================== [ 30.489470] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.490704] Read of size 8 at addr ffff8880159176b0 by task sshd/219 [ 30.491729] [ 30.492021] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.493170] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.494476] Call Trace: [ 30.494911] [ 30.495293] dump_stack_lvl+0x91/0xf0 [ 30.495952] print_report+0xcc/0x620 [ 30.496597] ? __virt_addr_valid+0x102/0x340 [ 30.497343] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.498015] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.498638] kasan_report+0xbe/0xf0 [ 30.499125] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.499748] vma_interval_tree_remove+0xc75/0xec0 [ 30.500348] vma_prepare+0xc54/0x11a0 [ 30.500829] __split_vma+0x5af/0x950 [ 30.501305] ? __pfx___split_vma+0x10/0x10 [ 30.501855] ? find_held_lock+0x2c/0x110 [ 30.502383] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.502968] ? lock_is_held_type+0x9f/0x120 [ 30.503509] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.504116] ? mtree_range_walk+0x632/0x900 [ 30.504669] ? mas_walk+0x5c7/0x7c0 [ 30.505149] do_vmi_munmap+0x1f1/0x2b0 [ 30.505651] mmap_region+0x1f9/0x2660 [ 30.506147] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.506662] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.507382] ? __pfx_lock_acquire+0x10/0x10 [ 30.507917] ? __pfx_mmap_region+0x10/0x10 [ 30.508445] ? security_mmap_addr+0x7d/0xa0 [ 30.508978] ? get_unmapped_area+0x1f5/0x3f0 [ 30.509545] do_mmap+0x854/0xf00 [ 30.509995] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.510490] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.511060] ksys_mmap_pgoff+0x3af/0x500 [ 30.511574] do_syscall_64+0x3f/0x90 [ 30.512065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.512725] RIP: 0033:0x7f3446a6ad82 [ 30.513189] 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 [ 30.515332] RSP: 002b:00007ffc55d7e9f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.516243] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3446a6ad82 [ 30.517107] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3445ea4000 [ 30.517972] RBP: 00007f3445ea4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.518818] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558f46e1dec0 [ 30.519659] R13: 00007ffc55d7ea10 R14: 00007ffc55d7ea40 R15: 00007ffc55d7eda0 [ 30.520521] [ 30.520813] [ 30.521035] Allocated by task 212: [ 30.521481] kasan_save_stack+0x22/0x50 [ 30.521996] kasan_set_track+0x25/0x30 [ 30.522496] __kasan_slab_alloc+0x59/0x70 [ 30.523027] kmem_cache_alloc+0x16b/0x370 [ 30.523548] vm_area_dup+0x20/0x160 [ 30.524006] __split_vma+0x170/0x950 [ 30.524477] split_vma+0xc6/0x110 [ 30.524927] mprotect_fixup+0x8d2/0xb30 [ 30.525442] do_mprotect_pkey+0x87e/0xd40 [ 30.525969] __x64_sys_mprotect+0x78/0xc0 [ 30.526494] do_syscall_64+0x3f/0x90 [ 30.526974] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.527608] [ 30.527828] Freed by task 13: [ 30.528206] kasan_save_stack+0x22/0x50 [ 30.528711] kasan_set_track+0x25/0x30 [ 30.529208] kasan_save_free_info+0x2b/0x50 [ 30.529769] __kasan_slab_free+0x10a/0x190 [ 30.530300] kmem_cache_free+0x10d/0x4d0 [ 30.530813] rcu_core+0x8c8/0x2860 [ 30.531256] __do_softirq+0x1b7/0x7d4 [ 30.531734] [ 30.531954] Last potentially related work creation: [ 30.532536] kasan_save_stack+0x22/0x50 [ 30.533047] __kasan_record_aux_stack+0x8e/0xa0 [ 30.533631] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.534287] remove_vma+0x139/0x170 [ 30.534751] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.535315] do_vmi_munmap+0x1f1/0x2b0 [ 30.535809] __vm_munmap+0x138/0x3a0 [ 30.536274] __x64_sys_munmap+0x59/0x80 [ 30.536777] do_syscall_64+0x3f/0x90 [ 30.537260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.537917] [ 30.538131] The buggy address belongs to the object at ffff888015917658 [ 30.538131] which belongs to the cache vm_area_struct of size 168 [ 30.539630] The buggy address is located 88 bytes inside of [ 30.539630] freed 168-byte region [ffff888015917658, ffff888015917700) [ 30.541053] [ 30.541272] The buggy address belongs to the physical page: [ 30.541962] page:0000000041d5b78a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15917 [ 30.543090] memcg:ffff88801452fd01 [ 30.543523] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.544170] page_type: 0xffffffff() [ 30.544621] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.545559] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801452fd01 [ 30.546482] page dumped because: kasan: bad access detected [ 30.547156] [ 30.547376] Memory state around the buggy address: [ 30.547983] ffff888015917580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.548870] ffff888015917600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.549749] >ffff888015917680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.550604] ^ [ 30.551193] ffff888015917700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.552048] ffff888015917780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.552902] ================================================================== [ 30.553934] Disabling lock debugging due to kernel taint [ 32.346464] BUG: Bad rss-counter state mm:00000000bd077b2d type:MM_FILEPAGES val:33 [ 32.347211] BUG: Bad rss-counter state mm:00000000bd077b2d type:MM_ANONPAGES val:22 [ 32.830871] BUG: Bad rss-counter state mm:00000000c9da32a5 type:MM_FILEPAGES val:33 [ 32.831652] BUG: Bad rss-counter state mm:00000000c9da32a5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39210' (ECDSA) to the list of known hosts. 2023/06/20 23:32:53 fuzzer started 2023/06/20 23:32:53 dialing manager at localhost:36067 2023/06/20 23:32:53 checking machine... 2023/06/20 23:32:53 checking revisions... [ 33.487677] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:32:53 testing simple program... [ 33.541519] cgroup: Unknown subsys name 'net' [ 33.595699] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:32:53 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880196c74e0 RCX=0000000000000001 RDX=1ffff110032d8eb3 RSI=ffffffff83635bd7 RDI=ffff8880196c74ec RBP=ffff8880196c7598 RSP=ffff8880196c73f8 R8 =0000000000000001 R9 =ffff8880196c7458 R10=0000000000038001 R11=0000000000091afa R12=ffff8880196c74e0 R13=0000000000000000 R14=ffff88800fb48000 R15=0000000000000000 RIP=ffffffff813ad543 RFL=00000212 [----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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f893fa7a900 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=00007f8940031618 CR3=000000000edbe000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf39500 RCX=ffffffff812e0473 RDX=1ffff1100d9e72a1 RSI=0000000000000004 RDI=ffff88806cf39500 RBP=ffff88806cf39508 RSP=ffff88806cf09d58 R8 =0000000000000000 R9 =ffffed100d9e72a0 R10=ffff88806cf39503 R11=000000168477de64 R12=ffff88806cf39510 R13=ffff88806cf39518 R14=0000000000000001 R15=ffff888008d951c0 RIP=ffffffff812e0505 RFL=00000046 [---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=00007fed6bbf3030 CR3=000000000cb52000 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=5b2aab85f3abb2abe44df647aac399e4 XMM02=000000000011c768ec2efd57dc4c00df XMM03=0000000000122d40aa8f6b0c9ef65083 XMM04=6f40b8ae39a4db9800000000000ae988 XMM05=24915dccc59bee0d0000000000133aa0 XMM06=806171799158d96700000000001327d0 XMM07=e042d86d42eb936e0000000000123018 XMM08=aa8f6b0c9ef65083000000000011c7c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000