syzkaller login: [ 36.583185] BUG: Bad rss-counter state mm:0000000007b12eef type:MM_FILEPAGES val:33 [ 36.584969] BUG: Bad rss-counter state mm:0000000007b12eef type:MM_ANONPAGES val:22 [ 36.759143] ================================================================== [ 36.760381] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.761701] Read of size 8 at addr ffff8880168a6798 by task sshd/218 [ 36.762545] [ 36.762785] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.763762] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.764840] Call Trace: [ 36.765212] [ 36.765532] dump_stack_lvl+0x91/0xf0 [ 36.766073] print_report+0xcc/0x620 [ 36.766614] ? __virt_addr_valid+0x102/0x340 [ 36.767234] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.767922] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.768610] kasan_report+0xbe/0xf0 [ 36.769157] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.769879] vma_interval_tree_remove+0xc75/0xec0 [ 36.770592] vma_prepare+0xc54/0x11a0 [ 36.771147] __split_vma+0x5af/0x950 [ 36.771703] ? __pfx___split_vma+0x10/0x10 [ 36.772324] ? find_held_lock+0x2c/0x110 [ 36.772932] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.773617] ? lock_is_held_type+0x9f/0x120 [ 36.774249] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.774953] ? mtree_range_walk+0x632/0x900 [ 36.775593] ? mas_walk+0x5c7/0x7c0 [ 36.776151] do_vmi_munmap+0x1f1/0x2b0 [ 36.776736] mmap_region+0x1f9/0x2660 [ 36.777303] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.777898] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.778731] ? __pfx_lock_acquire+0x10/0x10 [ 36.779356] ? __pfx_mmap_region+0x10/0x10 [ 36.779977] ? security_mmap_addr+0x7d/0xa0 [ 36.780593] ? get_unmapped_area+0x1f5/0x3f0 [ 36.781246] do_mmap+0x854/0xf00 [ 36.781748] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.782325] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.782972] ksys_mmap_pgoff+0x3af/0x500 [ 36.783555] do_syscall_64+0x3f/0x90 [ 36.784107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.784846] RIP: 0033:0x7f07543c7d82 [ 36.785378] 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 [ 36.787824] RSP: 002b:00007fff47307d08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.788864] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f07543c7d82 [ 36.789855] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0753801000 [ 36.790834] RBP: 00007f0753801000 R08: 0000000000000009 R09: 0000000000001000 [ 36.791805] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d2c2eedd90 [ 36.792787] R13: 00007fff47307d20 R14: 00007fff47307d50 R15: 00007fff473080b0 [ 36.793791] [ 36.794129] [ 36.794374] Allocated by task 211: [ 36.794868] kasan_save_stack+0x22/0x50 [ 36.795453] kasan_set_track+0x25/0x30 [ 36.796014] __kasan_slab_alloc+0x59/0x70 [ 36.796616] kmem_cache_alloc+0x16b/0x370 [ 36.797218] vm_area_dup+0x20/0x160 [ 36.797737] __split_vma+0x170/0x950 [ 36.798282] split_vma+0xc6/0x110 [ 36.798787] mprotect_fixup+0x8d2/0xb30 [ 36.799360] do_mprotect_pkey+0x87e/0xd40 [ 36.799963] __x64_sys_mprotect+0x78/0xc0 [ 36.800560] do_syscall_64+0x3f/0x90 [ 36.801119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.801860] [ 36.802110] Freed by task 202: [ 36.802619] kasan_save_stack+0x22/0x50 [ 36.803214] kasan_set_track+0x25/0x30 [ 36.803786] kasan_save_free_info+0x2b/0x50 [ 36.804406] __kasan_slab_free+0x10a/0x190 [ 36.805025] kmem_cache_free+0x10d/0x4d0 [ 36.805799] rcu_core+0x8c8/0x2860 [ 36.806352] __do_softirq+0x1b7/0x7d4 [ 36.806947] [ 36.807219] Last potentially related work creation: [ 36.807943] kasan_save_stack+0x22/0x50 [ 36.808566] __kasan_record_aux_stack+0x8e/0xa0 [ 36.809307] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.810103] remove_vma+0x139/0x170 [ 36.810671] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.811387] do_vmi_munmap+0x1f1/0x2b0 [ 36.811992] __vm_munmap+0x138/0x3a0 [ 36.812597] __x64_sys_munmap+0x59/0x80 [ 36.813231] do_syscall_64+0x3f/0x90 [ 36.813819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.814620] [ 36.814888] The buggy address belongs to the object at ffff8880168a6740 [ 36.814888] which belongs to the cache vm_area_struct of size 168 [ 36.816716] The buggy address is located 88 bytes inside of [ 36.816716] freed 168-byte region [ffff8880168a6740, ffff8880168a67e8) [ 36.818475] [ 36.818741] The buggy address belongs to the physical page: [ 36.819567] page:000000008a8e1abe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168a6 [ 36.821002] memcg:ffff88800f851701 [ 36.821557] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.822254] page_type: 0xffffffff() [ 36.822742] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.823738] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f851701 [ 36.824730] page dumped because: kasan: bad access detected [ 36.825460] [ 36.825702] Memory state around the buggy address: [ 36.826341] ffff8880168a6680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.827283] ffff8880168a6700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 36.828233] >ffff8880168a6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 36.829182] ^ [ 36.829721] ffff8880168a6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 36.830647] ffff8880168a6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 36.831565] ================================================================== [ 36.832657] Disabling lock debugging due to kernel taint [ 38.626268] BUG: Bad rss-counter state mm:00000000af187164 type:MM_FILEPAGES val:33 [ 38.627312] BUG: Bad rss-counter state mm:00000000af187164 type:MM_ANONPAGES val:22 [ 39.183538] BUG: Bad rss-counter state mm:0000000096f1db60 type:MM_FILEPAGES val:33 [ 39.184737] BUG: Bad rss-counter state mm:0000000096f1db60 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21477' (ECDSA) to the list of known hosts. 2023/06/19 21:16:37 fuzzer started 2023/06/19 21:16:38 dialing manager at localhost:44161 2023/06/19 21:16:38 checking machine... 2023/06/19 21:16:38 checking revisions... [ 39.810831] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:16:38 testing simple program... [ 39.852116] cgroup: Unknown subsys name 'net' [ 39.908972] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:16:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007fe0c34fbd00 RCX=0000000000000000 RDX=ffff88800d6f51c0 RSI=ffffffff813a0ad6 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff888017367428 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88800d6f51c0 R15=ffff88800d960000 RIP=ffffffff814c081b 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 00007fe0c2eb9700 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=00007f6c5b85fab0 CR3=0000000015e68000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3732325b646873732037333a3631 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363735 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=0000000000000000 RBX=dffffc0000000000 RCX=ffffffff81ef7ba4 RDX=ffff88800f7a1b40 RSI=0000000000000005 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff8880173af680 R8 =0000000000000004 R9 =0000000000000001 R10=0000000000000001 R11=6873733d6c616e69 R12=ffff888008ccd958 R13=0000000000000005 R14=0000000000000001 R15=0000000000000005 RIP=ffffffff814c0298 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 00007f62f6e0a900 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=00007ffce76ae000 CR3=000000000d770000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000