syzkaller login: [ 30.248888] BUG: Bad rss-counter state mm:0000000086de0deb type:MM_FILEPAGES val:33 [ 30.250122] BUG: Bad rss-counter state mm:0000000086de0deb type:MM_ANONPAGES val:22 [ 30.373466] ================================================================== [ 30.374344] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.375237] Read of size 8 at addr ffff8880181f9a50 by task sshd/219 [ 30.375956] [ 30.376167] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.377085] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.378002] Call Trace: [ 30.378308] [ 30.378579] dump_stack_lvl+0x91/0xf0 [ 30.379079] print_report+0xcc/0x620 [ 30.379546] ? __virt_addr_valid+0x102/0x340 [ 30.380068] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.380658] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.381265] kasan_report+0xbe/0xf0 [ 30.381737] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.382362] vma_interval_tree_remove+0xc75/0xec0 [ 30.382962] vma_prepare+0xc54/0x11a0 [ 30.383464] __split_vma+0x5af/0x950 [ 30.383934] ? __pfx___split_vma+0x10/0x10 [ 30.384471] ? find_held_lock+0x2c/0x110 [ 30.384997] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.385560] ? lock_is_held_type+0x9f/0x120 [ 30.386110] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.386725] ? mtree_range_walk+0x632/0x900 [ 30.387313] ? mas_walk+0x5c7/0x7c0 [ 30.387792] do_vmi_munmap+0x1f1/0x2b0 [ 30.388288] mmap_region+0x1f9/0x2660 [ 30.388772] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.389286] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.389996] ? __pfx_lock_acquire+0x10/0x10 [ 30.390530] ? __pfx_mmap_region+0x10/0x10 [ 30.391061] ? security_mmap_addr+0x7d/0xa0 [ 30.391604] ? get_unmapped_area+0x1f5/0x3f0 [ 30.392180] do_mmap+0x854/0xf00 [ 30.392615] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.393113] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.393676] ksys_mmap_pgoff+0x3af/0x500 [ 30.394191] do_syscall_64+0x3f/0x90 [ 30.394670] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.395326] RIP: 0033:0x7fbfd8efad82 [ 30.395780] 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 [ 30.397901] RSP: 002b:00007fffba4474c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.398809] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbfd8efad82 [ 30.399695] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbfd8334000 [ 30.400547] RBP: 00007fbfd8334000 R08: 0000000000000009 R09: 0000000000001000 [ 30.401386] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e936cd3ec0 [ 30.402233] R13: 00007fffba4474e0 R14: 00007fffba447510 R15: 00007fffba447870 [ 30.403088] [ 30.403392] [ 30.403608] Allocated by task 212: [ 30.404028] kasan_save_stack+0x22/0x50 [ 30.404528] kasan_set_track+0x25/0x30 [ 30.405025] __kasan_slab_alloc+0x59/0x70 [ 30.405549] kmem_cache_alloc+0x16b/0x370 [ 30.406064] vm_area_dup+0x20/0x160 [ 30.406515] __split_vma+0x170/0x950 [ 30.406982] split_vma+0xc6/0x110 [ 30.407433] mprotect_fixup+0x8d2/0xb30 [ 30.407945] do_mprotect_pkey+0x87e/0xd40 [ 30.408473] __x64_sys_mprotect+0x78/0xc0 [ 30.409002] do_syscall_64+0x3f/0x90 [ 30.409482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.410119] [ 30.410340] Freed by task 212: [ 30.410741] kasan_save_stack+0x22/0x50 [ 30.411251] kasan_set_track+0x25/0x30 [ 30.411744] kasan_save_free_info+0x2b/0x50 [ 30.412275] __kasan_slab_free+0x10a/0x190 [ 30.412818] kmem_cache_free+0x10d/0x4d0 [ 30.413325] rcu_core+0x8c8/0x2860 [ 30.413774] __do_softirq+0x1b7/0x7d4 [ 30.414245] [ 30.414464] Last potentially related work creation: [ 30.415050] kasan_save_stack+0x22/0x50 [ 30.415571] __kasan_record_aux_stack+0x8e/0xa0 [ 30.416157] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.416798] remove_vma+0x139/0x170 [ 30.417250] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.417809] do_vmi_munmap+0x1f1/0x2b0 [ 30.418304] __vm_munmap+0x138/0x3a0 [ 30.418774] __x64_sys_munmap+0x59/0x80 [ 30.419286] do_syscall_64+0x3f/0x90 [ 30.419770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.420414] [ 30.420625] The buggy address belongs to the object at ffff8880181f99f8 [ 30.420625] which belongs to the cache vm_area_struct of size 168 [ 30.422115] The buggy address is located 88 bytes inside of [ 30.422115] freed 168-byte region [ffff8880181f99f8, ffff8880181f9aa0) [ 30.423532] [ 30.423744] The buggy address belongs to the physical page: [ 30.424399] page:0000000087b849bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x181f9 [ 30.425494] memcg:ffff88801951dd01 [ 30.425909] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.426555] page_type: 0xffffffff() [ 30.427015] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.427962] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801951dd01 [ 30.428871] page dumped because: kasan: bad access detected [ 30.429508] [ 30.429720] Memory state around the buggy address: [ 30.430297] ffff8880181f9900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.431146] ffff8880181f9980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.432024] >ffff8880181f9a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.432880] ^ [ 30.433568] ffff8880181f9a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.434413] ffff8880181f9b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.435267] ================================================================== [ 30.436239] Disabling lock debugging due to kernel taint [ 32.288142] BUG: Bad rss-counter state mm:000000009acd92b6 type:MM_FILEPAGES val:33 [ 32.289133] BUG: Bad rss-counter state mm:000000009acd92b6 type:MM_ANONPAGES val:22 [ 32.738590] BUG: Bad rss-counter state mm:000000007aa2db5a type:MM_FILEPAGES val:33 [ 32.739546] BUG: Bad rss-counter state mm:000000007aa2db5a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30491' (ECDSA) to the list of known hosts. 2023/06/21 04:12:58 fuzzer started 2023/06/21 04:12:59 dialing manager at localhost:36067 2023/06/21 04:12:59 checking machine... 2023/06/21 04:12:59 checking revisions... [ 33.481986] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:12:59 testing simple program... [ 33.526336] cgroup: Unknown subsys name 'net' [ 33.569468] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:12:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff87f97640 RCX=0000000000000000 RDX=ffff888019523680 RSI=ffffffff83ab18a9 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888018247508 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000f2 R11=00000a0100000a01 R12=0000000000000000 R13=00000000000000f2 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff83ab18b1 RFL=00000293 [--S-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 00007f7e898b6900 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=00007ffc7f6d4000 CR3=000000000d834000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff81809adc RDX=000000000000809a RSI=000000000000809a RDI=ffffffff86509c58 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000000 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 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=00007f6f1f0ea000 CR3=000000000c70a000 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=140eda4ad142789e094864046a934faf XMM02=ec2efd57dc4c00df000000000011a658 XMM03=1539f2e05ad3c1c4000000000011a728 XMM04=69f7a440de56354900000000000ae988 XMM05=dfcdbad4f1609c370000000000131ab8 XMM06=e04703979683d97d0000000000130920 XMM07=e042d86d42eb936e0000000000121bf0 XMM08=1539f2e05ad3c1c4000000000011a728 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000