syzkaller login: [ 31.028799] BUG: Bad rss-counter state mm:00000000936241ce type:MM_FILEPAGES val:33 [ 31.030104] BUG: Bad rss-counter state mm:00000000936241ce type:MM_ANONPAGES val:22 [ 31.199210] ================================================================== [ 31.200301] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.201604] Read of size 8 at addr ffff88800ec6a798 by task sshd/219 [ 31.202547] [ 31.202811] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.203879] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.204903] Call Trace: [ 31.205228] [ 31.205514] dump_stack_lvl+0x91/0xf0 [ 31.206037] print_report+0xcc/0x620 [ 31.206524] ? __virt_addr_valid+0x102/0x340 [ 31.207095] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.207723] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.208354] kasan_report+0xbe/0xf0 [ 31.208855] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.209479] vma_interval_tree_remove+0xc75/0xec0 [ 31.210112] vma_prepare+0xc54/0x11a0 [ 31.210594] __split_vma+0x5af/0x950 [ 31.211078] ? __pfx___split_vma+0x10/0x10 [ 31.211631] ? find_held_lock+0x2c/0x110 [ 31.212163] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.212757] ? lock_is_held_type+0x9f/0x120 [ 31.213311] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.213956] ? mtree_range_walk+0x632/0x900 [ 31.214507] ? mas_walk+0x5c7/0x7c0 [ 31.215009] do_vmi_munmap+0x1f1/0x2b0 [ 31.215505] mmap_region+0x1f9/0x2660 [ 31.216002] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.216512] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.217256] ? __pfx_lock_acquire+0x10/0x10 [ 31.217793] ? __pfx_mmap_region+0x10/0x10 [ 31.218346] ? security_mmap_addr+0x7d/0xa0 [ 31.218890] ? get_unmapped_area+0x1f5/0x3f0 [ 31.219450] do_mmap+0x854/0xf00 [ 31.219902] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.220404] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.220997] ksys_mmap_pgoff+0x3af/0x500 [ 31.221503] do_syscall_64+0x3f/0x90 [ 31.222009] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.222658] RIP: 0033:0x7f1b9063bd82 [ 31.223130] 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 [ 31.225305] RSP: 002b:00007ffe39637bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.226230] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1b9063bd82 [ 31.227110] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b8fa75000 [ 31.227969] RBP: 00007f1b8fa75000 R08: 0000000000000009 R09: 0000000000001000 [ 31.228831] R10: 0000000000000812 R11: 0000000000000206 R12: 00005627cb396ec0 [ 31.229680] R13: 00007ffe39637bd0 R14: 00007ffe39637c00 R15: 00007ffe39637f60 [ 31.230556] [ 31.230864] [ 31.231086] Allocated by task 212: [ 31.231512] kasan_save_stack+0x22/0x50 [ 31.232035] kasan_set_track+0x25/0x30 [ 31.232531] __kasan_slab_alloc+0x59/0x70 [ 31.233095] kmem_cache_alloc+0x16b/0x370 [ 31.233682] vm_area_dup+0x20/0x160 [ 31.234299] __split_vma+0x170/0x950 [ 31.234927] split_vma+0xc6/0x110 [ 31.235525] mprotect_fixup+0x8d2/0xb30 [ 31.236207] do_mprotect_pkey+0x87e/0xd40 [ 31.236926] __x64_sys_mprotect+0x78/0xc0 [ 31.237491] do_syscall_64+0x3f/0x90 [ 31.238002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.238649] [ 31.238890] Freed by task 212: [ 31.239335] kasan_save_stack+0x22/0x50 [ 31.239862] kasan_set_track+0x25/0x30 [ 31.240362] kasan_save_free_info+0x2b/0x50 [ 31.240926] __kasan_slab_free+0x10a/0x190 [ 31.241464] kmem_cache_free+0x10d/0x4d0 [ 31.242009] rcu_core+0x8c8/0x2860 [ 31.242456] __do_softirq+0x1b7/0x7d4 [ 31.243023] [ 31.243239] Last potentially related work creation: [ 31.243829] kasan_save_stack+0x22/0x50 [ 31.244343] __kasan_record_aux_stack+0x8e/0xa0 [ 31.244946] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.245595] remove_vma+0x139/0x170 [ 31.246078] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.246635] do_vmi_munmap+0x1f1/0x2b0 [ 31.247144] __vm_munmap+0x138/0x3a0 [ 31.247617] __x64_sys_munmap+0x59/0x80 [ 31.248132] do_syscall_64+0x3f/0x90 [ 31.248619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.249287] [ 31.249508] Second to last potentially related work creation: [ 31.250236] kasan_save_stack+0x22/0x50 [ 31.250841] __kasan_record_aux_stack+0x8e/0xa0 [ 31.251423] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.252067] remove_vma+0x139/0x170 [ 31.252527] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.253130] do_vmi_munmap+0x1f1/0x2b0 [ 31.253624] mmap_region+0x1f9/0x2660 [ 31.254140] do_mmap+0x854/0xf00 [ 31.254581] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.255081] ksys_mmap_pgoff+0x3af/0x500 [ 31.255589] do_syscall_64+0x3f/0x90 [ 31.256093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.256752] [ 31.256999] The buggy address belongs to the object at ffff88800ec6a740 [ 31.256999] which belongs to the cache vm_area_struct of size 168 [ 31.258534] The buggy address is located 88 bytes inside of [ 31.258534] freed 168-byte region [ffff88800ec6a740, ffff88800ec6a7e8) [ 31.259964] [ 31.260183] The buggy address belongs to the physical page: [ 31.260872] page:000000005ed01726 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec6a [ 31.261982] memcg:ffff88800c4a2101 [ 31.262418] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.263074] page_type: 0xffffffff() [ 31.263531] raw: 0100000000000200 ffff88800879fc80 ffffea00003b0300 dead000000000006 [ 31.264473] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4a2101 [ 31.265428] page dumped because: kasan: bad access detected [ 31.266105] [ 31.266320] Memory state around the buggy address: [ 31.266918] ffff88800ec6a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.267769] ffff88800ec6a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.268650] >ffff88800ec6a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.269525] ^ [ 31.270042] ffff88800ec6a800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.270920] ffff88800ec6a880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.271787] ================================================================== [ 31.272938] Disabling lock debugging due to kernel taint [ 33.884351] BUG: Bad rss-counter state mm:00000000793a6500 type:MM_FILEPAGES val:33 [ 33.885361] BUG: Bad rss-counter state mm:00000000793a6500 type:MM_ANONPAGES val:22 [ 34.405217] BUG: Bad rss-counter state mm:0000000023f04b14 type:MM_FILEPAGES val:33 [ 34.406425] BUG: Bad rss-counter state mm:0000000023f04b14 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55566' (ECDSA) to the list of known hosts. 2023/06/20 06:41:04 fuzzer started 2023/06/20 06:41:04 dialing manager at localhost:44161 2023/06/20 06:41:04 checking machine... 2023/06/20 06:41:04 checking revisions... [ 35.040270] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:41:04 testing simple program... [ 35.089578] cgroup: Unknown subsys name 'net' [ 35.129502] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:41:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002fa4eaf RSI=ffffffff81370a3a RDI=ffff888017d275e8 RBP=ffff888017d275b8 RSP=ffff888017d27518 R8 =0000000000000001 R9 =ffff888017d27560 R10=0000000000038001 R11=0000000000020ed0 R12=ffff888017d275e8 R13=0000000000000000 R14=ffff888014540000 R15=ffff88800cbfc480 RIP=ffffffff813ad42e 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 00007ff3642ca700 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=00007f214d0b25a0 CR3=000000000df90000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a34343933352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343439 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86088c1f RBX=0000000000000001 RCX=ffffffff86088c1a RDX=0000000000000000 RSI=1ffffffff0c11183 RDI=ffffffff85d88408 RBP=ffff8880165578f0 RSP=ffff8880165577d8 R8 =ffffffff86088c1a R9 =ffff8880165578d8 R10=0000000000038001 R11=0000000000003c0d R12=ffff8880165578f8 R13=ffff8880165578e0 R14=ffff8880165578d9 R15=ffff888016557898 RIP=ffffffff81130a5b RFL=00000213 [----A-C] 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 00007f804e452900 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=00007f804ea07650 CR3=000000001ca24000 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