syzkaller login: [ 35.066662] BUG: Bad rss-counter state mm:0000000056fffccb type:MM_FILEPAGES val:33 [ 35.067846] BUG: Bad rss-counter state mm:0000000056fffccb type:MM_ANONPAGES val:22 [ 35.102180] ================================================================== [ 35.103251] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.104471] Read of size 8 at addr ffff88800e79cd08 by task sshd/221 [ 35.105507] [ 35.105808] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.106957] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.108252] Call Trace: [ 35.108664] [ 35.109030] dump_stack_lvl+0x91/0xf0 [ 35.109674] print_report+0xcc/0x620 [ 35.110334] ? __virt_addr_valid+0x102/0x340 [ 35.111110] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.111930] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.112644] kasan_report+0xbe/0xf0 [ 35.113182] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.113872] vma_interval_tree_remove+0xc75/0xec0 [ 35.114564] vma_prepare+0xc54/0x11a0 [ 35.115084] __split_vma+0x5af/0x950 [ 35.115590] ? __pfx___split_vma+0x10/0x10 [ 35.116177] ? find_held_lock+0x2c/0x110 [ 35.116754] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.117398] ? lock_is_held_type+0x9f/0x120 [ 35.117988] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.118679] ? mtree_range_walk+0x632/0x900 [ 35.119283] ? mas_walk+0x5c7/0x7c0 [ 35.119759] do_vmi_munmap+0x1f1/0x2b0 [ 35.120260] mmap_region+0x1f9/0x2660 [ 35.120742] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.121255] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.121968] ? __pfx_lock_acquire+0x10/0x10 [ 35.122529] ? __pfx_mmap_region+0x10/0x10 [ 35.123066] ? security_mmap_addr+0x7d/0xa0 [ 35.123606] ? get_unmapped_area+0x1f5/0x3f0 [ 35.124161] do_mmap+0x854/0xf00 [ 35.124601] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.125099] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.125662] ksys_mmap_pgoff+0x3af/0x500 [ 35.126184] do_syscall_64+0x3f/0x90 [ 35.126670] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.127319] RIP: 0033:0x7f6372b24d82 [ 35.127777] 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 [ 35.129914] RSP: 002b:00007ffe75a03018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.130848] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6372b24d82 [ 35.131701] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6371f5e000 [ 35.132558] RBP: 00007f6371f5e000 R08: 0000000000000009 R09: 0000000000001000 [ 35.133409] R10: 0000000000000812 R11: 0000000000000206 R12: 000055796dee1ec0 [ 35.134270] R13: 00007ffe75a03030 R14: 00007ffe75a03060 R15: 00007ffe75a033c0 [ 35.135141] [ 35.135437] [ 35.135649] Allocated by task 214: [ 35.136087] kasan_save_stack+0x22/0x50 [ 35.136595] kasan_set_track+0x25/0x30 [ 35.137146] __kasan_slab_alloc+0x59/0x70 [ 35.137678] kmem_cache_alloc+0x16b/0x370 [ 35.138220] vm_area_dup+0x20/0x160 [ 35.138683] __split_vma+0x170/0x950 [ 35.139148] split_vma+0xc6/0x110 [ 35.139599] mprotect_fixup+0x8d2/0xb30 [ 35.140102] do_mprotect_pkey+0x87e/0xd40 [ 35.140630] __x64_sys_mprotect+0x78/0xc0 [ 35.141166] do_syscall_64+0x3f/0x90 [ 35.141656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.142595] [ 35.142817] Freed by task 214: [ 35.143210] kasan_save_stack+0x22/0x50 [ 35.143720] kasan_set_track+0x25/0x30 [ 35.144223] kasan_save_free_info+0x2b/0x50 [ 35.144767] __kasan_slab_free+0x10a/0x190 [ 35.145297] kmem_cache_free+0x10d/0x4d0 [ 35.145806] rcu_core+0x8c8/0x2860 [ 35.146260] __do_softirq+0x1b7/0x7d4 [ 35.146738] [ 35.146953] Last potentially related work creation: [ 35.147535] kasan_save_stack+0x22/0x50 [ 35.148041] __kasan_record_aux_stack+0x8e/0xa0 [ 35.148614] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.149262] remove_vma+0x139/0x170 [ 35.149720] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.150306] do_vmi_munmap+0x1f1/0x2b0 [ 35.150797] __vm_munmap+0x138/0x3a0 [ 35.151264] __x64_sys_munmap+0x59/0x80 [ 35.151762] do_syscall_64+0x3f/0x90 [ 35.152237] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.152876] [ 35.153094] Second to last potentially related work creation: [ 35.153774] kasan_save_stack+0x22/0x50 [ 35.154290] __kasan_record_aux_stack+0x8e/0xa0 [ 35.154863] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.155503] remove_vma+0x139/0x170 [ 35.155956] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.156520] do_vmi_munmap+0x1f1/0x2b0 [ 35.157009] mmap_region+0x1f9/0x2660 [ 35.157486] do_mmap+0x854/0xf00 [ 35.157919] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.158431] ksys_mmap_pgoff+0x3af/0x500 [ 35.158938] do_syscall_64+0x3f/0x90 [ 35.159419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.160059] [ 35.160278] The buggy address belongs to the object at ffff88800e79ccb0 [ 35.160278] which belongs to the cache vm_area_struct of size 168 [ 35.161759] The buggy address is located 88 bytes inside of [ 35.161759] freed 168-byte region [ffff88800e79ccb0, ffff88800e79cd58) [ 35.163182] [ 35.163402] The buggy address belongs to the physical page: [ 35.164224] page:00000000b9db91d6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe79c [ 35.165838] memcg:ffff88800e1e8001 [ 35.166392] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.167243] page_type: 0xffffffff() [ 35.167825] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 35.168991] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1e8001 [ 35.170163] page dumped because: kasan: bad access detected [ 35.171014] [ 35.171259] Memory state around the buggy address: [ 35.171883] ffff88800e79cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 35.172766] ffff88800e79cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 35.173643] >ffff88800e79cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 35.174513] ^ [ 35.174965] ffff88800e79cd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.175846] ffff88800e79ce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 35.176727] ================================================================== [ 35.177683] Disabling lock debugging due to kernel taint [ 37.167573] BUG: Bad rss-counter state mm:000000007b5e6c12 type:MM_FILEPAGES val:33 [ 37.168571] BUG: Bad rss-counter state mm:000000007b5e6c12 type:MM_ANONPAGES val:22 [ 37.733456] BUG: Bad rss-counter state mm:0000000056d3a21b type:MM_FILEPAGES val:33 [ 37.734753] BUG: Bad rss-counter state mm:0000000056d3a21b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28584' (ECDSA) to the list of known hosts. 2023/06/19 22:39:06 fuzzer started 2023/06/19 22:39:07 dialing manager at localhost:44161 2023/06/19 22:39:07 checking machine... 2023/06/19 22:39:07 checking revisions... [ 38.377115] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:39:07 testing simple program... [ 38.415094] cgroup: Unknown subsys name 'net' [ 38.469436] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:39:03 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800ee68ea9 RCX=1ffff1100393f117 RDX=1ffff11001dcd1d5 RSI=ffff88800dc923f8 RDI=ffff88800ee68eb0 RBP=ffff88800dc923f8 RSP=ffff88806ce09d98 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=0000000000000000 R12=ffff88800ee68ea8 R13=ffff88801c9f88b9 R14=ffff88800e8bcea8 R15=ffffffff87b86f80 RIP=ffffffff844ccd20 RFL=00000012 [----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 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=00007ffc6afbba78 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=00007f1841bf3510000055d593d91790 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=0000000000000000 RBX=0000000000000001 RCX=ffffffff810bd032 RDX=dffffc0000000000 RSI=ffff888015f475f0 RDI=ffff888015f47620 RBP=ffff888015f47678 RSP=ffff888015f47560 R8 =0000000000000001 R9 =ffff888015f47660 R10=0000000000038001 R11=0000000000006097 R12=ffff888015f47680 R13=ffff888015f47668 R14=ffff888015f47661 R15=ffff888015f47620 RIP=ffffffff81130719 RFL=00000282 [--S----] 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 00007f611e1a1900 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=00007f611e756650 CR3=000000001a3bc000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000