syzkaller login: [ 32.388486] BUG: Bad rss-counter state mm:0000000005ac1b24 type:MM_FILEPAGES val:33 [ 32.389918] BUG: Bad rss-counter state mm:0000000005ac1b24 type:MM_ANONPAGES val:22 [ 32.541847] ================================================================== [ 32.542770] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.543722] Read of size 8 at addr ffff88801959d310 by task sshd/220 [ 32.544529] [ 32.544755] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.545724] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.546719] Call Trace: [ 32.547055] [ 32.547371] dump_stack_lvl+0x91/0xf0 [ 32.547869] print_report+0xcc/0x620 [ 32.548385] ? __virt_addr_valid+0x102/0x340 [ 32.548950] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.549596] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.550222] kasan_report+0xbe/0xf0 [ 32.550706] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.551328] vma_interval_tree_remove+0xc75/0xec0 [ 32.551946] vma_prepare+0xc54/0x11a0 [ 32.552456] __split_vma+0x5af/0x950 [ 32.552935] ? __pfx___split_vma+0x10/0x10 [ 32.553471] ? find_held_lock+0x2c/0x110 [ 32.553998] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.554570] ? lock_is_held_type+0x9f/0x120 [ 32.555115] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.555737] ? mtree_range_walk+0x632/0x900 [ 32.556310] ? mas_walk+0x5c7/0x7c0 [ 32.556798] do_vmi_munmap+0x1f1/0x2b0 [ 32.557297] mmap_region+0x1f9/0x2660 [ 32.557786] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.558300] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.559022] ? __pfx_lock_acquire+0x10/0x10 [ 32.559567] ? __pfx_mmap_region+0x10/0x10 [ 32.560099] ? security_mmap_addr+0x7d/0xa0 [ 32.560647] ? get_unmapped_area+0x1f5/0x3f0 [ 32.561200] do_mmap+0x854/0xf00 [ 32.561651] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.562149] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.562720] ksys_mmap_pgoff+0x3af/0x500 [ 32.563235] do_syscall_64+0x3f/0x90 [ 32.563717] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.564385] RIP: 0033:0x7f647f2bcd82 [ 32.564841] 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 [ 32.566987] RSP: 002b:00007ffe7bc78948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.567919] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f647f2bcd82 [ 32.568794] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f647e6f6000 [ 32.569664] RBP: 00007f647e6f6000 R08: 0000000000000009 R09: 0000000000001000 [ 32.570535] R10: 0000000000000812 R11: 0000000000000206 R12: 00005648f5a94ec0 [ 32.571395] R13: 00007ffe7bc78960 R14: 00007ffe7bc78990 R15: 00007ffe7bc78cf0 [ 32.572263] [ 32.572586] [ 32.572803] Allocated by task 213: [ 32.573234] kasan_save_stack+0x22/0x50 [ 32.573746] kasan_set_track+0x25/0x30 [ 32.574251] __kasan_slab_alloc+0x59/0x70 [ 32.574786] kmem_cache_alloc+0x16b/0x370 [ 32.575306] vm_area_dup+0x20/0x160 [ 32.575761] __split_vma+0x170/0x950 [ 32.576232] split_vma+0xc6/0x110 [ 32.576692] mprotect_fixup+0x8d2/0xb30 [ 32.577201] do_mprotect_pkey+0x87e/0xd40 [ 32.577722] __x64_sys_mprotect+0x78/0xc0 [ 32.578252] do_syscall_64+0x3f/0x90 [ 32.578725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.579369] [ 32.579589] Freed by task 213: [ 32.579982] kasan_save_stack+0x22/0x50 [ 32.580497] kasan_set_track+0x25/0x30 [ 32.581000] kasan_save_free_info+0x2b/0x50 [ 32.581543] __kasan_slab_free+0x10a/0x190 [ 32.582079] kmem_cache_free+0x10d/0x4d0 [ 32.582593] rcu_core+0x8c8/0x2860 [ 32.583041] __do_softirq+0x1b7/0x7d4 [ 32.583525] [ 32.583739] Last potentially related work creation: [ 32.584342] kasan_save_stack+0x22/0x50 [ 32.584859] __kasan_record_aux_stack+0x8e/0xa0 [ 32.585442] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.586089] remove_vma+0x139/0x170 [ 32.586544] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.587110] do_vmi_munmap+0x1f1/0x2b0 [ 32.587601] __vm_munmap+0x138/0x3a0 [ 32.588071] __x64_sys_munmap+0x59/0x80 [ 32.588585] do_syscall_64+0x3f/0x90 [ 32.589062] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.589708] [ 32.589922] The buggy address belongs to the object at ffff88801959d2b8 [ 32.589922] which belongs to the cache vm_area_struct of size 168 [ 32.591396] The buggy address is located 88 bytes inside of [ 32.591396] freed 168-byte region [ffff88801959d2b8, ffff88801959d360) [ 32.592825] [ 32.593044] The buggy address belongs to the physical page: [ 32.593716] page:0000000009665180 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1959d [ 32.594824] memcg:ffff88800c651701 [ 32.595253] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.595903] page_type: 0xffffffff() [ 32.596373] raw: 0100000000000200 ffff88800879fc80 ffffea0000357b40 dead000000000004 [ 32.597310] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c651701 [ 32.598219] page dumped because: kasan: bad access detected [ 32.598886] [ 32.599111] Memory state around the buggy address: [ 32.599688] ffff88801959d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.600571] ffff88801959d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.601432] >ffff88801959d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.602287] ^ [ 32.602749] ffff88801959d380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.603613] ffff88801959d400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.604487] ================================================================== [ 32.605478] Disabling lock debugging due to kernel taint [ 34.630376] BUG: Bad rss-counter state mm:000000006b0ed406 type:MM_FILEPAGES val:33 [ 34.631622] BUG: Bad rss-counter state mm:000000006b0ed406 type:MM_ANONPAGES val:22 [ 35.026658] BUG: Bad rss-counter state mm:00000000b4b5e3f0 type:MM_FILEPAGES val:33 [ 35.027711] BUG: Bad rss-counter state mm:00000000b4b5e3f0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45923' (ECDSA) to the list of known hosts. 2023/06/19 18:52:00 fuzzer started 2023/06/19 18:52:00 dialing manager at localhost:44161 2023/06/19 18:52:00 checking machine... 2023/06/19 18:52:00 checking revisions... [ 35.769690] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:52:00 testing simple program... [ 35.819824] cgroup: Unknown subsys name 'net' [ 35.860791] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:51:59 Registers: info registers vcpu 0 RAX=ffffffff83639306 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11003026e96 RSI=ffffffff83639306 RDI=ffff888018137520 RBP=ffff8880181374f0 RSP=ffff888018137450 R8 =0000000000000001 R9 =ffff888018137498 R10=0000000000038001 R11=0000000000091be7 R12=ffff888018137520 R13=0000000000000000 R14=ffff888009483680 R15=0000000000082cc0 RIP=ffffffff84532440 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 00007f7b69cea900 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=00007ffe42427000 CR3=000000000e4ce000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007efdd4b1a3e0 CR3=000000000cf88000 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=dc9867424ba6c09098469e16f182a1f7 XMM02=2c67c8bc2e329bc3000000000011d060 XMM03=fb795ef6d65770560000000000124190 XMM04=2f8a6863303c406a00000000000ae988 XMM05=19e9129bd510f2350000000000133f48 XMM06=698f2f40911184e40000000000132db0 XMM07=e042d86d42eb936e0000000000124410 XMM08=9f771263ca5dd9ce000000000011d0c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000