syzkaller login: [ 30.932052] BUG: Bad rss-counter state mm:00000000299a8398 type:MM_FILEPAGES val:33 [ 30.933276] BUG: Bad rss-counter state mm:00000000299a8398 type:MM_ANONPAGES val:22 [ 31.105249] ================================================================== [ 31.106296] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.107297] Read of size 8 at addr ffff888017d38058 by task sshd/219 [ 31.108188] [ 31.108422] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.109361] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.110424] Call Trace: [ 31.110763] [ 31.111063] dump_stack_lvl+0x91/0xf0 [ 31.111585] print_report+0xcc/0x620 [ 31.112099] ? __virt_addr_valid+0x102/0x340 [ 31.112688] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.113369] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.114020] kasan_report+0xbe/0xf0 [ 31.114526] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.115201] vma_interval_tree_remove+0xc75/0xec0 [ 31.115869] vma_prepare+0xc54/0x11a0 [ 31.116394] __split_vma+0x5af/0x950 [ 31.116923] ? __pfx___split_vma+0x10/0x10 [ 31.117507] ? find_held_lock+0x2c/0x110 [ 31.118083] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.118705] ? lock_is_held_type+0x9f/0x120 [ 31.119298] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.119966] ? mtree_range_walk+0x632/0x900 [ 31.120576] ? mas_walk+0x5c7/0x7c0 [ 31.121106] do_vmi_munmap+0x1f1/0x2b0 [ 31.121643] mmap_region+0x1f9/0x2660 [ 31.122173] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.122732] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.123520] ? __pfx_lock_acquire+0x10/0x10 [ 31.124103] ? __pfx_mmap_region+0x10/0x10 [ 31.124688] ? security_mmap_addr+0x7d/0xa0 [ 31.125290] ? get_unmapped_area+0x1f5/0x3f0 [ 31.125895] do_mmap+0x854/0xf00 [ 31.126376] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.126922] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.127540] ksys_mmap_pgoff+0x3af/0x500 [ 31.128096] do_syscall_64+0x3f/0x90 [ 31.128626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.129346] RIP: 0033:0x7f42057eed82 [ 31.129851] 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 [ 31.132206] RSP: 002b:00007ffd87770488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.133207] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f42057eed82 [ 31.134141] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4204c28000 [ 31.135075] RBP: 00007f4204c28000 R08: 0000000000000009 R09: 0000000000001000 [ 31.136006] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559a115e0ec0 [ 31.136964] R13: 00007ffd877704a0 R14: 00007ffd877704d0 R15: 00007ffd87770830 [ 31.137894] [ 31.138212] [ 31.138449] Allocated by task 212: [ 31.138923] kasan_save_stack+0x22/0x50 [ 31.139475] kasan_set_track+0x25/0x30 [ 31.140016] __kasan_slab_alloc+0x59/0x70 [ 31.140590] kmem_cache_alloc+0x16b/0x370 [ 31.141157] vm_area_dup+0x20/0x160 [ 31.141634] __split_vma+0x170/0x950 [ 31.142126] split_vma+0xc6/0x110 [ 31.142592] mprotect_fixup+0x8d2/0xb30 [ 31.143118] do_mprotect_pkey+0x87e/0xd40 [ 31.143666] __x64_sys_mprotect+0x78/0xc0 [ 31.144223] do_syscall_64+0x3f/0x90 [ 31.144729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.145432] [ 31.145656] Freed by task 19: [ 31.146057] kasan_save_stack+0x22/0x50 [ 31.146592] kasan_set_track+0x25/0x30 [ 31.147115] kasan_save_free_info+0x2b/0x50 [ 31.147689] __kasan_slab_free+0x10a/0x190 [ 31.148253] kmem_cache_free+0x10d/0x4d0 [ 31.148796] rcu_core+0x8c8/0x2860 [ 31.149297] __do_softirq+0x1b7/0x7d4 [ 31.149807] [ 31.150032] Last potentially related work creation: [ 31.150652] kasan_save_stack+0x22/0x50 [ 31.151183] __kasan_record_aux_stack+0x8e/0xa0 [ 31.151794] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.152481] remove_vma+0x139/0x170 [ 31.152972] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.153557] do_vmi_munmap+0x1f1/0x2b0 [ 31.154073] __vm_munmap+0x138/0x3a0 [ 31.154563] __x64_sys_munmap+0x59/0x80 [ 31.155098] do_syscall_64+0x3f/0x90 [ 31.155594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.156289] [ 31.156516] The buggy address belongs to the object at ffff888017d38000 [ 31.156516] which belongs to the cache vm_area_struct of size 168 [ 31.158076] The buggy address is located 88 bytes inside of [ 31.158076] freed 168-byte region [ffff888017d38000, ffff888017d380a8) [ 31.159546] [ 31.159772] The buggy address belongs to the physical page: [ 31.160471] page:000000007673d897 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17d38 [ 31.161638] memcg:ffff88800ec69601 [ 31.162087] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.162827] page_type: 0xffffffff() [ 31.163304] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ba100 dead000000000003 [ 31.164288] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec69601 [ 31.165257] page dumped because: kasan: bad access detected [ 31.165958] [ 31.166187] Memory state around the buggy address: [ 31.166805] ffff888017d37f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.167709] ffff888017d37f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.168614] >ffff888017d38000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.169536] ^ [ 31.170298] ffff888017d38080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 31.171198] ffff888017d38100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.172104] ================================================================== [ 31.173322] Disabling lock debugging due to kernel taint [ 33.077391] BUG: Bad rss-counter state mm:000000009f4268f5 type:MM_FILEPAGES val:33 [ 33.078398] BUG: Bad rss-counter state mm:000000009f4268f5 type:MM_ANONPAGES val:22 [ 33.586856] BUG: Bad rss-counter state mm:00000000dd6fcc94 type:MM_FILEPAGES val:33 [ 33.587784] BUG: Bad rss-counter state mm:00000000dd6fcc94 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22107' (ECDSA) to the list of known hosts. 2023/06/21 07:40:14 fuzzer started 2023/06/21 07:40:15 dialing manager at localhost:36067 2023/06/21 07:40:15 checking machine... 2023/06/21 07:40:15 checking revisions... [ 34.299665] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:40:15 testing simple program... [ 34.341425] cgroup: Unknown subsys name 'net' [ 34.389690] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:40:14 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11003016e8a RSP=ffff8880180b7430 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000b0300000b03 R12=ffffffff8560b640 R13=ffffffff83ab1b1f R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff8135b980 RFL=00000286 [--S--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 00007f9fb8851900 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=00007f9fb8e08618 CR3=000000000e514000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fb1e78c3060 CR3=000000000c58c000 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=4d89af2309c7a29e5e4859469f1d5c8e XMM02=000000000011b088ec2efd57dc4c00df XMM03=0000000000121a283e42fb3479b7038e XMM04=70bb2ecf035c38dd00000000000ae988 XMM05=dfcdbad4f1609c3700000000001315e0 XMM06=3ac3b28a1384f14600000000001307b8 XMM07=e042d86d42eb936e0000000000121d00 XMM08=3e42fb3479b7038e000000000011b0e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000