syzkaller login: [ 34.046276] BUG: Bad rss-counter state mm:00000000af3cd643 type:MM_FILEPAGES val:33 [ 34.047731] BUG: Bad rss-counter state mm:00000000af3cd643 type:MM_ANONPAGES val:22 [ 34.207521] ================================================================== [ 34.208558] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.209556] Read of size 8 at addr ffff88800e445c20 by task sshd/218 [ 34.210494] [ 34.210728] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.211643] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.212706] Call Trace: [ 34.213047] [ 34.213349] dump_stack_lvl+0x91/0xf0 [ 34.213866] print_report+0xcc/0x620 [ 34.214377] ? __virt_addr_valid+0x102/0x340 [ 34.214961] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.215617] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.216281] kasan_report+0xbe/0xf0 [ 34.216790] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.217453] vma_interval_tree_remove+0xc75/0xec0 [ 34.218097] vma_prepare+0xc54/0x11a0 [ 34.218613] __split_vma+0x5af/0x950 [ 34.219117] ? __pfx___split_vma+0x10/0x10 [ 34.219689] ? find_held_lock+0x2c/0x110 [ 34.220262] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.220868] ? lock_is_held_type+0x9f/0x120 [ 34.221447] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.222097] ? mtree_range_walk+0x632/0x900 [ 34.222688] ? mas_walk+0x5c7/0x7c0 [ 34.223198] do_vmi_munmap+0x1f1/0x2b0 [ 34.223724] mmap_region+0x1f9/0x2660 [ 34.224259] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.224810] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.225575] ? __pfx_lock_acquire+0x10/0x10 [ 34.226144] ? __pfx_mmap_region+0x10/0x10 [ 34.226706] ? security_mmap_addr+0x7d/0xa0 [ 34.227272] ? get_unmapped_area+0x1f5/0x3f0 [ 34.227855] do_mmap+0x854/0xf00 [ 34.228341] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.228871] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.229475] ksys_mmap_pgoff+0x3af/0x500 [ 34.230014] do_syscall_64+0x3f/0x90 [ 34.230522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.231212] RIP: 0033:0x7f9c8471ad82 [ 34.231708] 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 [ 34.234004] RSP: 002b:00007ffdcc27ad68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.234976] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9c8471ad82 [ 34.235878] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9c83b54000 [ 34.236800] RBP: 00007f9c83b54000 R08: 0000000000000009 R09: 0000000000001000 [ 34.237703] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564f1e4ecec0 [ 34.238604] R13: 00007ffdcc27ad80 R14: 00007ffdcc27adb0 R15: 00007ffdcc27b110 [ 34.239510] [ 34.239820] [ 34.240051] Allocated by task 211: [ 34.240515] kasan_save_stack+0x22/0x50 [ 34.241056] kasan_set_track+0x25/0x30 [ 34.241584] __kasan_slab_alloc+0x59/0x70 [ 34.242147] kmem_cache_alloc+0x16b/0x370 [ 34.242701] vm_area_dup+0x20/0x160 [ 34.243190] __split_vma+0x170/0x950 [ 34.243685] split_vma+0xc6/0x110 [ 34.244178] mprotect_fixup+0x8d2/0xb30 [ 34.244722] do_mprotect_pkey+0x87e/0xd40 [ 34.245274] __x64_sys_mprotect+0x78/0xc0 [ 34.245823] do_syscall_64+0x3f/0x90 [ 34.246322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.246999] [ 34.247225] Freed by task 211: [ 34.247641] kasan_save_stack+0x22/0x50 [ 34.248186] kasan_set_track+0x25/0x30 [ 34.248709] kasan_save_free_info+0x2b/0x50 [ 34.249281] __kasan_slab_free+0x10a/0x190 [ 34.249848] kmem_cache_free+0x10d/0x4d0 [ 34.250395] rcu_core+0x8c8/0x2860 [ 34.250867] __do_softirq+0x1b7/0x7d4 [ 34.251369] [ 34.251599] Last potentially related work creation: [ 34.252231] kasan_save_stack+0x22/0x50 [ 34.252766] __kasan_record_aux_stack+0x8e/0xa0 [ 34.253376] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.254063] remove_vma+0x139/0x170 [ 34.254538] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.255129] do_vmi_munmap+0x1f1/0x2b0 [ 34.255647] __vm_munmap+0x138/0x3a0 [ 34.256152] __x64_sys_munmap+0x59/0x80 [ 34.256682] do_syscall_64+0x3f/0x90 [ 34.257187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.257868] [ 34.258098] The buggy address belongs to the object at ffff88800e445bc8 [ 34.258098] which belongs to the cache vm_area_struct of size 168 [ 34.259672] The buggy address is located 88 bytes inside of [ 34.259672] freed 168-byte region [ffff88800e445bc8, ffff88800e445c70) [ 34.261158] [ 34.261389] The buggy address belongs to the physical page: [ 34.262085] page:00000000743d3bed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe445 [ 34.263232] memcg:ffff88801a344d01 [ 34.263681] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.264382] page_type: 0xffffffff() [ 34.264867] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.265842] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a344d01 [ 34.266810] page dumped because: kasan: bad access detected [ 34.267505] [ 34.267734] Memory state around the buggy address: [ 34.268364] ffff88800e445b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.269268] ffff88800e445b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.270178] >ffff88800e445c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.271081] ^ [ 34.271638] ffff88800e445c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.272557] ffff88800e445d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.273463] ================================================================== [ 34.274548] Disabling lock debugging due to kernel taint [ 37.206809] BUG: Bad rss-counter state mm:000000008d4dea13 type:MM_FILEPAGES val:33 [ 37.207576] BUG: Bad rss-counter state mm:000000008d4dea13 type:MM_ANONPAGES val:22 [ 37.600097] BUG: Bad rss-counter state mm:0000000076b44734 type:MM_FILEPAGES val:33 [ 37.600846] BUG: Bad rss-counter state mm:0000000076b44734 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7437' (ECDSA) to the list of known hosts. 2023/06/19 14:35:08 fuzzer started 2023/06/19 14:35:08 dialing manager at localhost:44161 2023/06/19 14:35:08 checking machine... 2023/06/19 14:35:08 checking revisions... [ 38.241579] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:35:08 testing simple program... [ 38.288793] cgroup: Unknown subsys name 'net' [ 38.348740] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:35:02 Registers: info registers vcpu 0 RAX=1ffffffff0ba79f0 RBX=ffff8880099de000 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff816b64f2 RDI=ffff88801922be48 RBP=ffff88801922be20 RSP=ffff888015f2fa50 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000055 R11=00000000000b6996 R12=0000000000000000 R13=ffff88801922c048 R14=ffff88801922be20 R15=0000000000000b79 RIP=ffffffff816b652e RFL=00000246 [---Z-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 00007f79a32fb700 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=00007fb15829b870 CR3=000000000e564000 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=2038303a35333a3431203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a35333a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110023dc743 RBX=ffff888011ee39e8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888011ee3a18 RBP=ffff8880113c4c08 RSP=ffff888016f97c98 R8 =0000000000000001 R9 =ffffed1002df2f87 R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff8880193d31a0 R14=ffffffff818c75ae R15=ffff888015c6f180 RIP=ffffffff81846362 RFL=00000046 [---Z-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 00007f07a93b4900 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=00007ffc5c9ff000 CR3=000000000f810000 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=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