syzkaller login: [ 61.843181] BUG: Bad rss-counter state mm:000000007f756fd5 type:MM_FILEPAGES val:33 [ 61.844285] BUG: Bad rss-counter state mm:000000007f756fd5 type:MM_ANONPAGES val:22 [ 62.016664] ================================================================== [ 62.017600] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.018549] Read of size 8 at addr ffff88800c5a6140 by task sshd/226 [ 62.019432] [ 62.019737] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.020637] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.021662] Call Trace: [ 62.022011] [ 62.022297] dump_stack_lvl+0x91/0xf0 [ 62.022805] print_report+0xcc/0x620 [ 62.023295] ? __virt_addr_valid+0x102/0x340 [ 62.023844] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.024464] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.025083] kasan_report+0xbe/0xf0 [ 62.025566] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.026193] vma_interval_tree_remove+0xc75/0xec0 [ 62.026820] vma_prepare+0xc54/0x11a0 [ 62.027303] __split_vma+0x5af/0x950 [ 62.027777] ? __pfx___split_vma+0x10/0x10 [ 62.028309] ? find_held_lock+0x2c/0x110 [ 62.028838] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.029410] ? lock_is_held_type+0x9f/0x120 [ 62.029960] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.030580] ? mtree_range_walk+0x632/0x900 [ 62.031133] ? mas_walk+0x5c7/0x7c0 [ 62.031608] do_vmi_munmap+0x1f1/0x2b0 [ 62.032111] mmap_region+0x1f9/0x2660 [ 62.032598] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.033119] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.033838] ? __pfx_lock_acquire+0x10/0x10 [ 62.034373] ? __pfx_mmap_region+0x10/0x10 [ 62.034913] ? security_mmap_addr+0x7d/0xa0 [ 62.035452] ? get_unmapped_area+0x1f5/0x3f0 [ 62.036009] do_mmap+0x854/0xf00 [ 62.036449] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.036949] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.037515] ksys_mmap_pgoff+0x3af/0x500 [ 62.038024] do_syscall_64+0x3f/0x90 [ 62.038501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.039181] RIP: 0033:0x7fc03d74dd82 [ 62.039647] 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 [ 62.041800] RSP: 002b:00007ffebda96c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.042734] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc03d74dd82 [ 62.043595] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc03cb87000 [ 62.044460] RBP: 00007fc03cb87000 R08: 0000000000000009 R09: 0000000000001000 [ 62.045314] R10: 0000000000000812 R11: 0000000000000206 R12: 00005601902acec0 [ 62.046171] R13: 00007ffebda96c30 R14: 00007ffebda96c60 R15: 00007ffebda96fc0 [ 62.047042] [ 62.047341] [ 62.047560] Allocated by task 219: [ 62.047994] kasan_save_stack+0x22/0x50 [ 62.048504] kasan_set_track+0x25/0x30 [ 62.049003] __kasan_slab_alloc+0x59/0x70 [ 62.049527] kmem_cache_alloc+0x16b/0x370 [ 62.050044] vm_area_dup+0x20/0x160 [ 62.050502] __split_vma+0x170/0x950 [ 62.050996] split_vma+0xc6/0x110 [ 62.051441] mprotect_fixup+0x8d2/0xb30 [ 62.051953] do_mprotect_pkey+0x87e/0xd40 [ 62.052477] __x64_sys_mprotect+0x78/0xc0 [ 62.053003] do_syscall_64+0x3f/0x90 [ 62.053478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.054131] [ 62.054348] Freed by task 19: [ 62.054750] kasan_save_stack+0x22/0x50 [ 62.055259] kasan_set_track+0x25/0x30 [ 62.055759] kasan_save_free_info+0x2b/0x50 [ 62.056297] __kasan_slab_free+0x10a/0x190 [ 62.056836] kmem_cache_free+0x10d/0x4d0 [ 62.057346] rcu_core+0x8c8/0x2860 [ 62.057796] __do_softirq+0x1b7/0x7d4 [ 62.058280] [ 62.058498] Last potentially related work creation: [ 62.059109] kasan_save_stack+0x22/0x50 [ 62.059617] __kasan_record_aux_stack+0x8e/0xa0 [ 62.060197] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.060934] remove_vma+0x139/0x170 [ 62.061394] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.061967] do_vmi_munmap+0x1f1/0x2b0 [ 62.062455] __vm_munmap+0x138/0x3a0 [ 62.062932] __x64_sys_munmap+0x59/0x80 [ 62.063435] do_syscall_64+0x3f/0x90 [ 62.063917] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.064562] [ 62.064781] The buggy address belongs to the object at ffff88800c5a60e8 [ 62.064781] which belongs to the cache vm_area_struct of size 168 [ 62.066268] The buggy address is located 88 bytes inside of [ 62.066268] freed 168-byte region [ffff88800c5a60e8, ffff88800c5a6190) [ 62.067716] [ 62.067933] The buggy address belongs to the physical page: [ 62.068598] page:000000000e3f1c87 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5a6 [ 62.069696] memcg:ffff88800dc8e501 [ 62.070125] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.070790] page_type: 0xffffffff() [ 62.071246] raw: 0100000000000200 ffff88800879fc80 ffffea000037eb40 dead000000000004 [ 62.072179] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc8e501 [ 62.073095] page dumped because: kasan: bad access detected [ 62.073769] [ 62.073991] Memory state around the buggy address: [ 62.074591] ffff88800c5a6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.075458] ffff88800c5a6080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 62.076329] >ffff88800c5a6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.077188] ^ [ 62.077835] ffff88800c5a6180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 62.078705] ffff88800c5a6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 62.079592] ================================================================== [ 62.080559] Disabling lock debugging due to kernel taint [ 64.504584] BUG: Bad rss-counter state mm:000000002199c870 type:MM_FILEPAGES val:33 [ 64.505733] BUG: Bad rss-counter state mm:000000002199c870 type:MM_ANONPAGES val:22 [ 64.929791] BUG: Bad rss-counter state mm:000000007280d086 type:MM_FILEPAGES val:33 [ 64.930886] BUG: Bad rss-counter state mm:000000007280d086 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32700' (ECDSA) to the list of known hosts. 2023/06/19 17:55:57 fuzzer started 2023/06/19 17:55:57 dialing manager at localhost:44161 2023/06/19 17:55:57 checking machine... 2023/06/19 17:55:57 checking revisions... [ 65.646997] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:55:57 testing simple program... [ 65.684180] cgroup: Unknown subsys name 'net' [ 65.730846] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:55:55 Registers: info registers vcpu 0 RAX=ffffffff811fbe6c RBX=ffffffff85d9f158 RCX=ffffffff811fbebd RDX=0000000000000000 RSI=ffffffff860aafca RDI=ffffffff85d9f128 RBP=ffffffff85d9f15c RSP=ffff888019f179e8 R8 =ffffffff860aafca R9 =ffff888019f17ae0 R10=0000000000038001 R11=0000000000009755 R12=ffffffff85d9f158 R13=ffffffff85d9f128 R14=0000000000000030 R15=dffffc0000000000 RIP=ffffffff8112fca7 RFL=00000206 [-----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 00007f18fe8f7900 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=00007ffef6acc000 CR3=000000000fdb2000 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=ffff888008c58400 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=00007f1733574038 CR3=000000000cab2000 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=4c4bb9fcc18ff9ba4b463af31c21af0f XMM02=2c67c8bc2e329bc3000000000011d298 XMM03=fb795ef6d65770560000000000124008 XMM04=f5e4c8896c74bec600000000000ae988 XMM05=6860aeb314f8829d00000000001338d8 XMM06=b3281d1387429b410000000000132ab0 XMM07=e042d86d42eb936e0000000000124288 XMM08=c31062e6c1fdef94000000000011d2f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000