syzkaller login: [ 38.740327] BUG: Bad rss-counter state mm:00000000d0fe47ef type:MM_FILEPAGES val:33 [ 38.742159] BUG: Bad rss-counter state mm:00000000d0fe47ef type:MM_ANONPAGES val:22 [ 38.908780] ================================================================== [ 38.909806] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.910805] Read of size 8 at addr ffff88800cf324e0 by task sshd/221 [ 38.911716] [ 38.911977] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.912821] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.913946] Call Trace: [ 38.914332] [ 38.914677] dump_stack_lvl+0x91/0xf0 [ 38.915281] print_report+0xcc/0x620 [ 38.915878] ? __virt_addr_valid+0x102/0x340 [ 38.916544] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.917295] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.918061] kasan_report+0xbe/0xf0 [ 38.918635] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.919286] vma_interval_tree_remove+0xc75/0xec0 [ 38.919953] vma_prepare+0xc54/0x11a0 [ 38.920454] __split_vma+0x5af/0x950 [ 38.920952] ? __pfx___split_vma+0x10/0x10 [ 38.921559] ? find_held_lock+0x2c/0x110 [ 38.922226] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.922838] ? lock_is_held_type+0x9f/0x120 [ 38.923393] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.924035] ? mtree_range_walk+0x632/0x900 [ 38.924611] ? mas_walk+0x5c7/0x7c0 [ 38.925139] do_vmi_munmap+0x1f1/0x2b0 [ 38.925740] mmap_region+0x1f9/0x2660 [ 38.926334] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.926948] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.927749] ? __pfx_lock_acquire+0x10/0x10 [ 38.928390] ? __pfx_mmap_region+0x10/0x10 [ 38.929020] ? security_mmap_addr+0x7d/0xa0 [ 38.929639] ? get_unmapped_area+0x1f5/0x3f0 [ 38.930269] do_mmap+0x854/0xf00 [ 38.930706] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.931228] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.931789] ksys_mmap_pgoff+0x3af/0x500 [ 38.932272] do_syscall_64+0x3f/0x90 [ 38.932727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.933343] RIP: 0033:0x7f047c047d82 [ 38.933776] 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 [ 38.935800] RSP: 002b:00007ffc56742318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.936890] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f047c047d82 [ 38.937812] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f047b481000 [ 38.938664] RBP: 00007f047b481000 R08: 0000000000000009 R09: 0000000000001000 [ 38.939584] R10: 0000000000000812 R11: 0000000000000206 R12: 000056422dc3fb20 [ 38.940538] R13: 00007ffc56742330 R14: 00007ffc56742360 R15: 00007ffc567426c0 [ 38.941450] [ 38.941738] [ 38.941945] Allocated by task 214: [ 38.942352] kasan_save_stack+0x22/0x50 [ 38.942836] kasan_set_track+0x25/0x30 [ 38.943307] __kasan_slab_alloc+0x59/0x70 [ 38.943864] kmem_cache_alloc+0x16b/0x370 [ 38.944466] vm_area_dup+0x20/0x160 [ 38.944993] __split_vma+0x170/0x950 [ 38.945579] split_vma+0xc6/0x110 [ 38.946094] mprotect_fixup+0x8d2/0xb30 [ 38.946659] do_mprotect_pkey+0x87e/0xd40 [ 38.947187] __x64_sys_mprotect+0x78/0xc0 [ 38.947730] do_syscall_64+0x3f/0x90 [ 38.948247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.948880] [ 38.949093] Freed by task 214: [ 38.949471] kasan_save_stack+0x22/0x50 [ 38.949953] kasan_set_track+0x25/0x30 [ 38.950449] kasan_save_free_info+0x2b/0x50 [ 38.950982] __kasan_slab_free+0x10a/0x190 [ 38.951544] kmem_cache_free+0x10d/0x4d0 [ 38.952043] rcu_core+0x8c8/0x2860 [ 38.952487] __do_softirq+0x1b7/0x7d4 [ 38.952994] [ 38.953217] Last potentially related work creation: [ 38.953822] kasan_save_stack+0x22/0x50 [ 38.954339] __kasan_record_aux_stack+0x8e/0xa0 [ 38.954929] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.955584] remove_vma+0x139/0x170 [ 38.956088] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.956651] do_vmi_munmap+0x1f1/0x2b0 [ 38.957137] __vm_munmap+0x138/0x3a0 [ 38.957607] __x64_sys_munmap+0x59/0x80 [ 38.958103] do_syscall_64+0x3f/0x90 [ 38.958587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.959250] [ 38.959479] The buggy address belongs to the object at ffff88800cf32488 [ 38.959479] which belongs to the cache vm_area_struct of size 168 [ 38.960967] The buggy address is located 88 bytes inside of [ 38.960967] freed 168-byte region [ffff88800cf32488, ffff88800cf32530) [ 38.962370] [ 38.962589] The buggy address belongs to the physical page: [ 38.963244] page:000000007d41c304 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcf32 [ 38.964325] memcg:ffff888016f1c901 [ 38.964749] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.965394] page_type: 0xffffffff() [ 38.965860] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.966787] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f1c901 [ 38.967713] page dumped because: kasan: bad access detected [ 38.968386] [ 38.968610] Memory state around the buggy address: [ 38.969202] ffff88800cf32380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.970081] ffff88800cf32400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.970965] >ffff88800cf32480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.971848] ^ [ 38.972602] ffff88800cf32500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 38.973467] ffff88800cf32580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.974318] ================================================================== [ 38.975300] Disabling lock debugging due to kernel taint [ 40.946436] BUG: Bad rss-counter state mm:000000009076e4e6 type:MM_FILEPAGES val:33 [ 40.948280] BUG: Bad rss-counter state mm:000000009076e4e6 type:MM_ANONPAGES val:22 [ 41.431264] BUG: Bad rss-counter state mm:0000000031cc93d2 type:MM_FILEPAGES val:33 [ 41.432905] BUG: Bad rss-counter state mm:0000000031cc93d2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39219' (ECDSA) to the list of known hosts. 2023/06/21 07:43:49 fuzzer started 2023/06/21 07:43:49 dialing manager at localhost:36067 2023/06/21 07:43:49 checking machine... 2023/06/21 07:43:49 checking revisions... [ 42.141585] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:43:49 testing simple program... [ 42.191128] cgroup: Unknown subsys name 'net' [ 42.241033] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:43:49 Registers: info registers vcpu 0 RAX=ffff8880142a1b40 RBX=ffff88806ce09b30 RCX=ffffffff81132ffe RDX=ffff88806ce09a48 RSI=0000000000000000 RDI=ffff88806ce09b08 RBP=ffff8880142a1b40 RSP=ffff88806ce09a48 R8 =0000000000000004 R9 =0000000000000000 R10=ffff88806ce09a98 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88806ce09ac0 R14=ffff88806ce09ae0 R15=ffff88806ce09a98 RIP=ffffffff8113300c 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 00007ff0d1590900 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=00007ff3d9443650 CR3=000000000d5f2000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c34f789c5dbbfa5600000000000ae988 XMM05=87fac8f80d2d27e30000000000132610 XMM06=c291bd5c70af25b90000000000131090 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880141dfab0 RCX=0000000000000001 RDX=1ffff1100283bf58 RSI=ffff8880141dfaa8 RDI=ffff8880141dfac0 RBP=ffff8880141dfaa8 RSP=ffff8880141df9b8 R8 =ffffffff86098096 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=0000000000000008 R13=ffff8880141d8000 R14=ffff8880141dfab0 R15=ffff8880141dfab0 RIP=ffffffff81130468 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 00007ff3d8e8e900 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=00007ff3d94460b0 CR3=000000000d4b8000 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