syzkaller login: [ 23.765955] BUG: Bad rss-counter state mm:00000000028c7f79 type:MM_FILEPAGES val:33 [ 23.766962] BUG: Bad rss-counter state mm:00000000028c7f79 type:MM_ANONPAGES val:22 [ 23.926998] ================================================================== [ 23.927914] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.928837] Read of size 8 at addr ffff888016c0e968 by task sshd/219 [ 23.929603] [ 23.929819] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.930792] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.931751] Call Trace: [ 23.932066] [ 23.932347] dump_stack_lvl+0x91/0xf0 [ 23.932834] print_report+0xcc/0x620 [ 23.933309] ? __virt_addr_valid+0x102/0x340 [ 23.933856] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.934652] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.935384] kasan_report+0xbe/0xf0 [ 23.935942] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.936678] vma_interval_tree_remove+0xc75/0xec0 [ 23.937429] vma_prepare+0xc54/0x11a0 [ 23.938017] __split_vma+0x5af/0x950 [ 23.938624] ? __pfx___split_vma+0x10/0x10 [ 23.939273] ? find_held_lock+0x2c/0x110 [ 23.939916] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.940608] ? lock_is_held_type+0x9f/0x120 [ 23.941274] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.942072] ? mtree_range_walk+0x632/0x900 [ 23.942789] ? mas_walk+0x5c7/0x7c0 [ 23.943384] do_vmi_munmap+0x1f1/0x2b0 [ 23.943997] mmap_region+0x1f9/0x2660 [ 23.944567] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.945174] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.946015] ? __pfx_lock_acquire+0x10/0x10 [ 23.946660] ? __pfx_mmap_region+0x10/0x10 [ 23.947294] ? security_mmap_addr+0x7d/0xa0 [ 23.947925] ? get_unmapped_area+0x1f5/0x3f0 [ 23.948576] do_mmap+0x854/0xf00 [ 23.949097] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.949687] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.950372] ksys_mmap_pgoff+0x3af/0x500 [ 23.950880] do_syscall_64+0x3f/0x90 [ 23.951366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.952022] RIP: 0033:0x7f806299fd82 [ 23.952476] 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 [ 23.954596] RSP: 002b:00007ffce1dfa808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.955519] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f806299fd82 [ 23.956362] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8061dd9000 [ 23.957196] RBP: 00007f8061dd9000 R08: 0000000000000009 R09: 0000000000001000 [ 23.958023] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563de1c4cec0 [ 23.958868] R13: 00007ffce1dfa820 R14: 00007ffce1dfa850 R15: 00007ffce1dfabb0 [ 23.959713] [ 23.960005] [ 23.960216] Allocated by task 212: [ 23.960641] kasan_save_stack+0x22/0x50 [ 23.961146] kasan_set_track+0x25/0x30 [ 23.961632] __kasan_slab_alloc+0x59/0x70 [ 23.962174] kmem_cache_alloc+0x16b/0x370 [ 23.962683] vm_area_dup+0x20/0x160 [ 23.963130] __split_vma+0x170/0x950 [ 23.963590] split_vma+0xc6/0x110 [ 23.964038] mprotect_fixup+0x8d2/0xb30 [ 23.964563] do_mprotect_pkey+0x87e/0xd40 [ 23.965103] __x64_sys_mprotect+0x78/0xc0 [ 23.965643] do_syscall_64+0x3f/0x90 [ 23.966142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.966807] [ 23.967026] Freed by task 212: [ 23.967431] kasan_save_stack+0x22/0x50 [ 23.967951] kasan_set_track+0x25/0x30 [ 23.968457] kasan_save_free_info+0x2b/0x50 [ 23.969010] __kasan_slab_free+0x10a/0x190 [ 23.969572] kmem_cache_free+0x10d/0x4d0 [ 23.970104] rcu_core+0x8c8/0x2860 [ 23.970595] __do_softirq+0x1b7/0x7d4 [ 23.971093] [ 23.971317] Last potentially related work creation: [ 23.971929] kasan_save_stack+0x22/0x50 [ 23.972446] __kasan_record_aux_stack+0x8e/0xa0 [ 23.973045] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.973710] remove_vma+0x139/0x170 [ 23.974188] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.974767] do_vmi_munmap+0x1f1/0x2b0 [ 23.975272] __vm_munmap+0x138/0x3a0 [ 23.975759] __x64_sys_munmap+0x59/0x80 [ 23.976275] do_syscall_64+0x3f/0x90 [ 23.976774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.977454] [ 23.977680] Second to last potentially related work creation: [ 23.978402] kasan_save_stack+0x22/0x50 [ 23.978922] __kasan_record_aux_stack+0x8e/0xa0 [ 23.979520] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.980188] remove_vma+0x139/0x170 [ 23.980663] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.981241] do_vmi_munmap+0x1f1/0x2b0 [ 23.981745] mmap_region+0x1f9/0x2660 [ 23.982269] do_mmap+0x854/0xf00 [ 23.982717] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.983226] ksys_mmap_pgoff+0x3af/0x500 [ 23.983742] do_syscall_64+0x3f/0x90 [ 23.984236] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.984905] [ 23.985125] The buggy address belongs to the object at ffff888016c0e910 [ 23.985125] which belongs to the cache vm_area_struct of size 168 [ 23.986669] The buggy address is located 88 bytes inside of [ 23.986669] freed 168-byte region [ffff888016c0e910, ffff888016c0e9b8) [ 23.988134] [ 23.988356] The buggy address belongs to the physical page: [ 23.989039] page:000000009887cd67 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c0e [ 23.990198] memcg:ffff88800fcd3601 [ 23.990648] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.991383] page_type: 0xffffffff() [ 23.991848] raw: 0100000000000200 ffff8880087a0c80 ffffea00005b0180 0000000000000005 [ 23.992815] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fcd3601 [ 23.993764] page dumped because: kasan: bad access detected [ 23.994462] [ 23.994687] Memory state around the buggy address: [ 23.995296] ffff888016c0e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 23.996195] ffff888016c0e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 23.997094] >ffff888016c0e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.997979] ^ [ 23.998812] ffff888016c0e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 23.999710] ffff888016c0ea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.000607] ================================================================== [ 24.001815] Disabling lock debugging due to kernel taint [ 26.002994] BUG: Bad rss-counter state mm:000000002382ea53 type:MM_FILEPAGES val:33 [ 26.005586] BUG: Bad rss-counter state mm:000000002382ea53 type:MM_ANONPAGES val:22 [ 26.514451] BUG: Bad rss-counter state mm:0000000078983270 type:MM_FILEPAGES val:33 [ 26.515435] BUG: Bad rss-counter state mm:0000000078983270 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31014' (ECDSA) to the list of known hosts. 2023/06/20 15:19:40 fuzzer started 2023/06/20 15:19:41 dialing manager at localhost:36067 2023/06/20 15:19:41 checking machine... 2023/06/20 15:19:41 checking revisions... [ 27.253553] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:19:41 testing simple program... [ 27.307436] cgroup: Unknown subsys name 'net' [ 27.347383] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:19:40 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff85407ee0 RCX=0000000000000001 RDX=1ffff1100d9c1355 RSI=ffffffff85407ed0 RDI=ffff88806ce09aa8 RBP=ffffffff85400000 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000baa4 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407ed0 R15=ffff88806ce09a98 RIP=ffffffff81131cac 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 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=00007fff57551db8 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=00007fc18cfa7510000055d6f8f6b790 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=1ffffffff0bbfcbe RBX=ffffffff85dfe5f4 RCX=ffffffff8180f5ba RDX=0000000000000000 RSI=ffffffff8613971a RDI=ffffffff85dfe5d0 RBP=ffffffff85dfe5f0 RSP=ffff888008e378c0 R8 =ffffffff8613971a R9 =ffff888008e379b8 R10=0000000000038001 R11=0000000000020f03 R12=ffffffff85dfe5f8 R13=ffffffff85dfe5d0 R14=ffffffff85dfe5ec R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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=00007ff91db730b0 CR3=000000000ff04000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000