syzkaller login: [ 32.825762] BUG: Bad rss-counter state mm:00000000d32713a5 type:MM_FILEPAGES val:33 [ 32.826774] BUG: Bad rss-counter state mm:00000000d32713a5 type:MM_ANONPAGES val:22 [ 32.992615] ================================================================== [ 32.993522] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.994461] Read of size 8 at addr ffff888010388880 by task sshd/222 [ 32.995217] [ 32.995434] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.996416] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.997392] Call Trace: [ 32.997713] [ 32.998000] dump_stack_lvl+0x91/0xf0 [ 32.998487] print_report+0xcc/0x620 [ 32.998975] ? __virt_addr_valid+0x102/0x340 [ 32.999531] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.000156] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.000792] kasan_report+0xbe/0xf0 [ 33.001267] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.001886] vma_interval_tree_remove+0xc75/0xec0 [ 33.002484] vma_prepare+0xc54/0x11a0 [ 33.002973] __split_vma+0x5af/0x950 [ 33.003455] ? __pfx___split_vma+0x10/0x10 [ 33.003988] ? find_held_lock+0x2c/0x110 [ 33.004520] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.005079] ? lock_is_held_type+0x9f/0x120 [ 33.005614] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.006229] ? mtree_range_walk+0x632/0x900 [ 33.006778] ? mas_walk+0x5c7/0x7c0 [ 33.007247] do_vmi_munmap+0x1f1/0x2b0 [ 33.007740] mmap_region+0x1f9/0x2660 [ 33.008222] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.008755] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.009469] ? __pfx_lock_acquire+0x10/0x10 [ 33.009997] ? __pfx_mmap_region+0x10/0x10 [ 33.010522] ? security_mmap_addr+0x7d/0xa0 [ 33.011045] ? get_unmapped_area+0x1f5/0x3f0 [ 33.011599] do_mmap+0x854/0xf00 [ 33.012033] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.012535] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.013098] ksys_mmap_pgoff+0x3af/0x500 [ 33.013599] do_syscall_64+0x3f/0x90 [ 33.014075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.014710] RIP: 0033:0x7f5db9fd0d82 [ 33.015169] 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 [ 33.017301] RSP: 002b:00007ffc6cc71648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.018211] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5db9fd0d82 [ 33.019064] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5db940a000 [ 33.019911] RBP: 00007f5db940a000 R08: 0000000000000009 R09: 0000000000001000 [ 33.020784] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d89a616ec0 [ 33.021633] R13: 00007ffc6cc71660 R14: 00007ffc6cc71690 R15: 00007ffc6cc719f0 [ 33.022489] [ 33.022784] [ 33.023007] Allocated by task 214: [ 33.023435] kasan_save_stack+0x22/0x50 [ 33.023965] kasan_set_track+0x25/0x30 [ 33.024483] __kasan_slab_alloc+0x59/0x70 [ 33.025014] kmem_cache_alloc+0x16b/0x370 [ 33.025542] vm_area_dup+0x20/0x160 [ 33.026018] __split_vma+0x170/0x950 [ 33.026481] split_vma+0xc6/0x110 [ 33.026930] mprotect_fixup+0x8d2/0xb30 [ 33.027446] do_mprotect_pkey+0x87e/0xd40 [ 33.027974] __x64_sys_mprotect+0x78/0xc0 [ 33.028517] do_syscall_64+0x3f/0x90 [ 33.028998] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.029650] [ 33.029869] Freed by task 214: [ 33.030263] kasan_save_stack+0x22/0x50 [ 33.030776] kasan_set_track+0x25/0x30 [ 33.031278] kasan_save_free_info+0x2b/0x50 [ 33.031821] __kasan_slab_free+0x10a/0x190 [ 33.032366] kmem_cache_free+0x10d/0x4d0 [ 33.032877] rcu_core+0x8c8/0x2860 [ 33.033324] __do_softirq+0x1b7/0x7d4 [ 33.033822] [ 33.034040] Last potentially related work creation: [ 33.034637] kasan_save_stack+0x22/0x50 [ 33.035148] __kasan_record_aux_stack+0x8e/0xa0 [ 33.035733] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.036385] remove_vma+0x139/0x170 [ 33.036833] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.037402] do_vmi_munmap+0x1f1/0x2b0 [ 33.037886] __vm_munmap+0x138/0x3a0 [ 33.038356] __x64_sys_munmap+0x59/0x80 [ 33.038855] do_syscall_64+0x3f/0x90 [ 33.039338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.039974] [ 33.040190] The buggy address belongs to the object at ffff888010388828 [ 33.040190] which belongs to the cache vm_area_struct of size 168 [ 33.041674] The buggy address is located 88 bytes inside of [ 33.041674] freed 168-byte region [ffff888010388828, ffff8880103888d0) [ 33.043087] [ 33.043302] The buggy address belongs to the physical page: [ 33.043956] page:0000000085872847 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10388 [ 33.045048] memcg:ffff88800e1ead01 [ 33.045468] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.046107] page_type: 0xffffffff() [ 33.046557] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.047465] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1ead01 [ 33.048383] page dumped because: kasan: bad access detected [ 33.049042] [ 33.049257] Memory state around the buggy address: [ 33.049832] ffff888010388780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 33.050683] ffff888010388800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.051536] >ffff888010388880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.052387] ^ [ 33.052793] ffff888010388900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.053650] ffff888010388980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 33.054498] ================================================================== [ 33.055595] Disabling lock debugging due to kernel taint [ 34.850362] BUG: Bad rss-counter state mm:000000007415516e type:MM_FILEPAGES val:33 [ 34.851052] BUG: Bad rss-counter state mm:000000007415516e type:MM_ANONPAGES val:22 [ 35.289888] BUG: Bad rss-counter state mm:00000000a5355188 type:MM_FILEPAGES val:33 [ 35.291090] BUG: Bad rss-counter state mm:00000000a5355188 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43967' (ECDSA) to the list of known hosts. 2023/06/19 23:32:01 fuzzer started 2023/06/19 23:32:01 dialing manager at localhost:44161 2023/06/19 23:32:01 checking machine... 2023/06/19 23:32:01 checking revisions... [ 35.981144] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:32:01 testing simple program... [ 36.038881] cgroup: Unknown subsys name 'net' [ 36.075754] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:31:58 Registers: info registers vcpu 0 RAX=0000000000020f00 RBX=0000000000000001 RCX=ffffffff8180f43a RDX=0000000000020f10 RSI=00000000000080f4 RDI=ffffffff86137e2c RBP=ffff888008d7f9b0 RSP=ffff888008d7f8e8 R8 =ffffffff86137dcc R9 =ffff888008d7f998 R10=0000000000038001 R11=0000000000020f00 R12=ffff888008d7f9b8 R13=ffff888008d7f9a0 R14=ffff888008d7f999 R15=ffff888008d7f958 RIP=ffffffff81130868 RFL=00000287 [--S--PC] 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=00007f492b0590b0 CR3=000000000da86000 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=32333a3332203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3133325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363135 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=0000000000003c0d RBX=0000000000000001 RCX=ffffffff810bd032 RDX=0000000000003c14 RSI=0000000000000bd0 RDI=ffffffff86088c44 RBP=ffff8880165e7578 RSP=ffff8880165e7460 R8 =ffffffff86088c1a R9 =ffff8880165e7560 R10=0000000000038001 R11=0000000000003c0d R12=ffff8880165e7580 R13=ffff8880165e7568 R14=ffff8880165e7561 R15=ffff8880165e7520 RIP=ffffffff81130868 RFL=00000287 [--S--PC] 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 00007f492aaa1900 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=00007f492b058618 CR3=000000000ca42000 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=563412feff00545000000000000080fe 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