syzkaller login: [ 67.059354] BUG: Bad rss-counter state mm:00000000a21b7f0e type:MM_FILEPAGES val:33 [ 67.060777] BUG: Bad rss-counter state mm:00000000a21b7f0e type:MM_ANONPAGES val:22 [ 67.206564] ================================================================== [ 67.207897] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 67.209156] Read of size 8 at addr ffff88800c4c74e0 by task sshd/220 [ 67.210085] [ 67.210346] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 67.211412] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 67.212623] Call Trace: [ 67.213014] [ 67.213363] dump_stack_lvl+0x91/0xf0 [ 67.213958] print_report+0xcc/0x620 [ 67.214544] ? __virt_addr_valid+0x102/0x340 [ 67.215218] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.215971] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.216735] kasan_report+0xbe/0xf0 [ 67.217314] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.218079] vma_interval_tree_remove+0xc75/0xec0 [ 67.218847] vma_prepare+0xc54/0x11a0 [ 67.219432] __split_vma+0x5af/0x950 [ 67.219996] ? __pfx___split_vma+0x10/0x10 [ 67.220636] ? find_held_lock+0x2c/0x110 [ 67.221273] do_vmi_align_munmap+0x2ba/0x11f0 [ 67.221966] ? lock_is_held_type+0x9f/0x120 [ 67.222625] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 67.223362] ? mtree_range_walk+0x632/0x900 [ 67.224025] ? mas_walk+0x5c7/0x7c0 [ 67.224591] do_vmi_munmap+0x1f1/0x2b0 [ 67.225183] mmap_region+0x1f9/0x2660 [ 67.225766] ? vm_mmap_pgoff+0x15c/0x3a0 [ 67.226384] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 67.227267] ? __pfx_lock_acquire+0x10/0x10 [ 67.227912] ? __pfx_mmap_region+0x10/0x10 [ 67.228559] ? security_mmap_addr+0x7d/0xa0 [ 67.229205] ? get_unmapped_area+0x1f5/0x3f0 [ 67.229871] do_mmap+0x854/0xf00 [ 67.230395] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.231022] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 67.231708] ksys_mmap_pgoff+0x3af/0x500 [ 67.232338] do_syscall_64+0x3f/0x90 [ 67.232915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.233577] RIP: 0033:0x7f86b6f0fd82 [ 67.234016] 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 [ 67.236054] RSP: 002b:00007ffd6c06de88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 67.236914] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f86b6f0fd82 [ 67.237711] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f86b6349000 [ 67.238510] RBP: 00007f86b6349000 R08: 0000000000000009 R09: 0000000000001000 [ 67.239318] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f01f26b20 [ 67.240112] R13: 00007ffd6c06dea0 R14: 00007ffd6c06ded0 R15: 00007ffd6c06e230 [ 67.240919] [ 67.241199] [ 67.241405] Allocated by task 213: [ 67.241810] kasan_save_stack+0x22/0x50 [ 67.242285] kasan_set_track+0x25/0x30 [ 67.242752] __kasan_slab_alloc+0x59/0x70 [ 67.243300] kmem_cache_alloc+0x16b/0x370 [ 67.243819] vm_area_dup+0x20/0x160 [ 67.244282] __split_vma+0x170/0x950 [ 67.244745] split_vma+0xc6/0x110 [ 67.245183] mprotect_fixup+0x8d2/0xb30 [ 67.245682] do_mprotect_pkey+0x87e/0xd40 [ 67.246208] __x64_sys_mprotect+0x78/0xc0 [ 67.246742] do_syscall_64+0x3f/0x90 [ 67.247236] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.247869] [ 67.248080] Freed by task 213: [ 67.248482] kasan_save_stack+0x22/0x50 [ 67.248997] kasan_set_track+0x25/0x30 [ 67.249493] kasan_save_free_info+0x2b/0x50 [ 67.250019] __kasan_slab_free+0x10a/0x190 [ 67.250557] kmem_cache_free+0x10d/0x4d0 [ 67.251078] rcu_core+0x8c8/0x2860 [ 67.251526] __do_softirq+0x1b7/0x7d4 [ 67.252003] [ 67.252217] Last potentially related work creation: [ 67.252802] kasan_save_stack+0x22/0x50 [ 67.253302] __kasan_record_aux_stack+0x8e/0xa0 [ 67.253871] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.254528] remove_vma+0x139/0x170 [ 67.254999] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.255557] do_vmi_munmap+0x1f1/0x2b0 [ 67.256040] __vm_munmap+0x138/0x3a0 [ 67.256513] __x64_sys_munmap+0x59/0x80 [ 67.257004] do_syscall_64+0x3f/0x90 [ 67.257480] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.258134] [ 67.258355] Second to last potentially related work creation: [ 67.259061] kasan_save_stack+0x22/0x50 [ 67.259572] __kasan_record_aux_stack+0x8e/0xa0 [ 67.260131] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.260775] remove_vma+0x139/0x170 [ 67.261234] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.261793] do_vmi_munmap+0x1f1/0x2b0 [ 67.262288] __vm_munmap+0x138/0x3a0 [ 67.262765] __x64_sys_munmap+0x59/0x80 [ 67.263274] do_syscall_64+0x3f/0x90 [ 67.263748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.264399] [ 67.264617] The buggy address belongs to the object at ffff88800c4c7488 [ 67.264617] which belongs to the cache vm_area_struct of size 168 [ 67.266123] The buggy address is located 88 bytes inside of [ 67.266123] freed 168-byte region [ffff88800c4c7488, ffff88800c4c7530) [ 67.267554] [ 67.267772] The buggy address belongs to the physical page: [ 67.268442] page:000000006a9f814e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4c7 [ 67.269526] memcg:ffff88800dba5001 [ 67.269956] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 67.270663] page_type: 0xffffffff() [ 67.271139] raw: 0100000000000200 ffff88800879fc80 ffffea000035bb80 dead000000000007 [ 67.272064] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dba5001 [ 67.272987] page dumped because: kasan: bad access detected [ 67.273664] [ 67.273878] Memory state around the buggy address: [ 67.274476] ffff88800c4c7380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 67.275347] ffff88800c4c7400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 67.276225] >ffff88800c4c7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.277087] ^ [ 67.277859] ffff88800c4c7500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 67.278727] ffff88800c4c7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.279600] ================================================================== [ 67.280707] Disabling lock debugging due to kernel taint [ 69.464992] BUG: Bad rss-counter state mm:00000000e782a656 type:MM_FILEPAGES val:33 [ 69.466043] BUG: Bad rss-counter state mm:00000000e782a656 type:MM_ANONPAGES val:22 [ 69.926467] BUG: Bad rss-counter state mm:000000008068ad48 type:MM_FILEPAGES val:33 [ 69.927481] BUG: Bad rss-counter state mm:000000008068ad48 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37075' (ECDSA) to the list of known hosts. 2023/06/19 23:56:57 fuzzer started 2023/06/19 23:56:57 dialing manager at localhost:44161 2023/06/19 23:56:57 checking machine... 2023/06/19 23:56:57 checking revisions... [ 70.670855] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:56:57 testing simple program... [ 70.721596] cgroup: Unknown subsys name 'net' [ 70.785455] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:56:28 Registers: info registers vcpu 0 RAX=fffffbfff0ba77db RBX=fffffbfff0ba77db RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88806ce09dd8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88806ce39518 R13=ffffffff8124c88b R14=dffffc0000000000 R15=ffff88806ce39500 RIP=ffffffff8180f004 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 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=00007f31ab2d6000 CR3=000000000f024000 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=df2fa96cb6d4c8b20646de9c5468027b XMM02=0000000000120510eff9b2d0a8fce9cb XMM03=00000000001205e02c67c8bc2e329bc3 XMM04=5ed939b04b643fe800000000000ae988 XMM05=728b5f81c37800e40000000000136008 XMM06=4fda316b135da52b0000000000134d38 XMM07=fb795ef6d657705600000000001244f8 XMM08=2c67c8bc2e329bc30000000000120580 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff86136d7c RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff8880182e7990 RSP=ffff8880182e78c8 R8 =ffffffff86136d80 R9 =ffff8880182e7978 R10=0000000000038001 R11=0000000000020c48 R12=ffff8880182e7998 R13=ffff8880182e7980 R14=ffff8880182e7979 R15=ffff8880182e7938 RIP=ffffffff81130ad0 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 00007f0fc3779900 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=00007f0fc3d30618 CR3=000000001814a000 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=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