syzkaller login: [ 41.167041] BUG: Bad rss-counter state mm:000000002e48b81f type:MM_FILEPAGES val:33 [ 41.167635] BUG: Bad rss-counter state mm:000000002e48b81f type:MM_ANONPAGES val:22 [ 41.196101] ================================================================== [ 41.196811] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.197595] Read of size 8 at addr ffff8880095dd3f8 by task sshd/220 [ 41.198196] [ 41.198367] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.199054] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.199839] Call Trace: [ 41.200112] [ 41.200324] dump_stack_lvl+0x91/0xf0 [ 41.200700] print_report+0xcc/0x620 [ 41.201050] ? __virt_addr_valid+0x102/0x340 [ 41.201534] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.202088] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.202509] kasan_report+0xbe/0xf0 [ 41.202771] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.203108] vma_interval_tree_remove+0xc75/0xec0 [ 41.203442] vma_prepare+0xc54/0x11a0 [ 41.203703] __split_vma+0x5af/0x950 [ 41.203958] ? __pfx___split_vma+0x10/0x10 [ 41.204252] ? find_held_lock+0x2c/0x110 [ 41.204537] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.204857] ? lock_is_held_type+0x9f/0x120 [ 41.205169] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.205526] ? mtree_range_walk+0x632/0x900 [ 41.205844] ? mas_walk+0x5c7/0x7c0 [ 41.206115] do_vmi_munmap+0x1f1/0x2b0 [ 41.206412] mmap_region+0x1f9/0x2660 [ 41.206692] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.206994] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.207416] ? __pfx_lock_acquire+0x10/0x10 [ 41.207729] ? __pfx_mmap_region+0x10/0x10 [ 41.208038] ? security_mmap_addr+0x7d/0xa0 [ 41.208348] ? get_unmapped_area+0x1f5/0x3f0 [ 41.208693] do_mmap+0x854/0xf00 [ 41.208961] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.209258] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.209589] ksys_mmap_pgoff+0x3af/0x500 [ 41.209892] do_syscall_64+0x3f/0x90 [ 41.210173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.210564] RIP: 0033:0x7ffb6e865d82 [ 41.210836] 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 [ 41.212136] RSP: 002b:00007fffd36e5808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.212694] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffb6e865d82 [ 41.213202] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffb6dc9f000 [ 41.213725] RBP: 00007ffb6dc9f000 R08: 0000000000000009 R09: 0000000000001000 [ 41.214231] R10: 0000000000000812 R11: 0000000000000206 R12: 00005611b4ab8d90 [ 41.214740] R13: 00007fffd36e5820 R14: 00007fffd36e5850 R15: 00007fffd36e5bb0 [ 41.215265] [ 41.215443] [ 41.215568] Allocated by task 213: [ 41.215824] kasan_save_stack+0x22/0x50 [ 41.216123] kasan_set_track+0x25/0x30 [ 41.216420] __kasan_slab_alloc+0x59/0x70 [ 41.216750] kmem_cache_alloc+0x16b/0x370 [ 41.217045] vm_area_dup+0x20/0x160 [ 41.217323] __split_vma+0x170/0x950 [ 41.217599] split_vma+0xc6/0x110 [ 41.217857] mprotect_fixup+0x8d2/0xb30 [ 41.218150] do_mprotect_pkey+0x87e/0xd40 [ 41.218456] __x64_sys_mprotect+0x78/0xc0 [ 41.218759] do_syscall_64+0x3f/0x90 [ 41.219038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.219425] [ 41.219551] Freed by task 213: [ 41.219786] kasan_save_stack+0x22/0x50 [ 41.220089] kasan_set_track+0x25/0x30 [ 41.220379] kasan_save_free_info+0x2b/0x50 [ 41.220708] __kasan_slab_free+0x10a/0x190 [ 41.221027] kmem_cache_free+0x10d/0x4d0 [ 41.221338] rcu_core+0x8c8/0x2860 [ 41.221608] __do_softirq+0x1b7/0x7d4 [ 41.221893] [ 41.222017] Last potentially related work creation: [ 41.222362] kasan_save_stack+0x22/0x50 [ 41.222655] __kasan_record_aux_stack+0x8e/0xa0 [ 41.222998] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.223377] remove_vma+0x139/0x170 [ 41.223644] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.223975] do_vmi_munmap+0x1f1/0x2b0 [ 41.224264] __vm_munmap+0x138/0x3a0 [ 41.224545] __x64_sys_munmap+0x59/0x80 [ 41.224849] do_syscall_64+0x3f/0x90 [ 41.225127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.225516] [ 41.225645] The buggy address belongs to the object at ffff8880095dd3a0 [ 41.225645] which belongs to the cache vm_area_struct of size 168 [ 41.226538] The buggy address is located 88 bytes inside of [ 41.226538] freed 168-byte region [ffff8880095dd3a0, ffff8880095dd448) [ 41.227379] [ 41.227506] The buggy address belongs to the physical page: [ 41.227901] page:00000000b4b35302 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95dd [ 41.228552] memcg:ffff888009630301 [ 41.228812] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.229197] page_type: 0xffffffff() [ 41.229478] raw: 0100000000000200 ffff88800879fc80 ffffea0000354500 dead000000000002 [ 41.230028] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009630301 [ 41.230566] page dumped because: kasan: bad access detected [ 41.230963] [ 41.231089] Memory state around the buggy address: [ 41.231453] ffff8880095dd280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 41.231967] ffff8880095dd300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 41.232480] >ffff8880095dd380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 41.232999] ^ [ 41.233506] ffff8880095dd400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 41.234023] ffff8880095dd480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.234533] ================================================================== [ 41.235074] Disabling lock debugging due to kernel taint [ 42.909787] BUG: Bad rss-counter state mm:000000005bbcec50 type:MM_FILEPAGES val:33 [ 42.910964] BUG: Bad rss-counter state mm:000000005bbcec50 type:MM_ANONPAGES val:22 [ 43.351426] BUG: Bad rss-counter state mm:00000000341f2cbd type:MM_FILEPAGES val:33 [ 43.352624] BUG: Bad rss-counter state mm:00000000341f2cbd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4541' (ECDSA) to the list of known hosts. 2023/06/20 07:40:10 fuzzer started 2023/06/20 07:40:10 dialing manager at localhost:44161 2023/06/20 07:40:10 checking machine... 2023/06/20 07:40:10 checking revisions... [ 43.983527] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:40:10 testing simple program... [ 44.031411] cgroup: Unknown subsys name 'net' [ 44.082039] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:40:07 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000048 RCX=ffffffff83726530 RDX=ffff8880159ad1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000049 RSP=ffff888017f377b8 R8 =0000000000000005 R9 =0000000000000011 R10=0000000000000048 R11=00000000000b6996 R12=000000000000000a R13=ffffffff87f96d20 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c07eb RFL=00000202 [-------] 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 00007fe389791900 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=00007ffcee900000 CR3=000000000fa42000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fa81c5d83d0 CR3=000000000c668000 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=a85392a7d1789987bd4163dcc0992f82 XMM02=2c67c8bc2e329bc3000000000011d9f0 XMM03=fb795ef6d657705600000000001243b0 XMM04=41f36c879725ac6300000000000ae988 XMM05=19e9129bd510f2350000000000133bf8 XMM06=6c5f6cff083b3b850000000000132dd0 XMM07=e042d86d42eb936e0000000000124688 XMM08=5188262b30a308b8000000000011da50 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000