syzkaller login: [ 81.785368] BUG: Bad rss-counter state mm:0000000002b4e4c7 type:MM_FILEPAGES val:33 [ 81.786601] BUG: Bad rss-counter state mm:0000000002b4e4c7 type:MM_ANONPAGES val:22 [ 81.825521] ================================================================== [ 81.826427] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 81.827365] Read of size 8 at addr ffff888018f2d4e0 by task sshd/219 [ 81.828256] [ 81.828474] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 81.829500] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 81.830489] Call Trace: [ 81.830805] [ 81.831087] dump_stack_lvl+0x91/0xf0 [ 81.831583] print_report+0xcc/0x620 [ 81.832062] ? __virt_addr_valid+0x102/0x340 [ 81.832614] ? vma_interval_tree_remove+0xc75/0xec0 [ 81.833246] ? vma_interval_tree_remove+0xc75/0xec0 [ 81.833862] kasan_report+0xbe/0xf0 [ 81.834336] ? vma_interval_tree_remove+0xc75/0xec0 [ 81.834959] vma_interval_tree_remove+0xc75/0xec0 [ 81.835557] vma_prepare+0xc54/0x11a0 [ 81.836035] __split_vma+0x5af/0x950 [ 81.836504] ? __pfx___split_vma+0x10/0x10 [ 81.837036] ? find_held_lock+0x2c/0x110 [ 81.837564] do_vmi_align_munmap+0x2ba/0x11f0 [ 81.838128] ? lock_is_held_type+0x9f/0x120 [ 81.838660] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 81.839265] ? mtree_range_walk+0x632/0x900 [ 81.839826] ? mas_walk+0x5c7/0x7c0 [ 81.840303] do_vmi_munmap+0x1f1/0x2b0 [ 81.840798] mmap_region+0x1f9/0x2660 [ 81.841284] ? vm_mmap_pgoff+0x15c/0x3a0 [ 81.841804] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 81.842516] ? __pfx_lock_acquire+0x10/0x10 [ 81.843052] ? __pfx_mmap_region+0x10/0x10 [ 81.843578] ? security_mmap_addr+0x7d/0xa0 [ 81.844113] ? get_unmapped_area+0x1f5/0x3f0 [ 81.844664] do_mmap+0x854/0xf00 [ 81.845131] vm_mmap_pgoff+0x1a6/0x3a0 [ 81.845626] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 81.846200] ksys_mmap_pgoff+0x3af/0x500 [ 81.846726] do_syscall_64+0x3f/0x90 [ 81.847224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 81.847895] RIP: 0033:0x7f28f745ed82 [ 81.848375] 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 [ 81.850663] RSP: 002b:00007fff97f6f6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 81.851631] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f28f745ed82 [ 81.852552] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f28f6898000 [ 81.853461] RBP: 00007f28f6898000 R08: 0000000000000009 R09: 0000000000001000 [ 81.854355] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f18dc81ec0 [ 81.855254] R13: 00007fff97f6f710 R14: 00007fff97f6f740 R15: 00007fff97f6faa0 [ 81.856157] [ 81.856462] [ 81.856692] Allocated by task 212: [ 81.857157] kasan_save_stack+0x22/0x50 [ 81.857688] kasan_set_track+0x25/0x30 [ 81.858210] __kasan_slab_alloc+0x59/0x70 [ 81.858754] kmem_cache_alloc+0x16b/0x370 [ 81.859307] vm_area_dup+0x20/0x160 [ 81.859783] __split_vma+0x170/0x950 [ 81.860272] split_vma+0xc6/0x110 [ 81.860748] mprotect_fixup+0x8d2/0xb30 [ 81.861277] do_mprotect_pkey+0x87e/0xd40 [ 81.861830] __x64_sys_mprotect+0x78/0xc0 [ 81.862385] do_syscall_64+0x3f/0x90 [ 81.862888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 81.863562] [ 81.863787] Freed by task 212: [ 81.864198] kasan_save_stack+0x22/0x50 [ 81.864735] kasan_set_track+0x25/0x30 [ 81.865249] kasan_save_free_info+0x2b/0x50 [ 81.865806] __kasan_slab_free+0x10a/0x190 [ 81.866366] kmem_cache_free+0x10d/0x4d0 [ 81.866898] rcu_core+0x8c8/0x2860 [ 81.867368] __do_softirq+0x1b7/0x7d4 [ 81.867868] [ 81.868089] Last potentially related work creation: [ 81.868722] kasan_save_stack+0x22/0x50 [ 81.869254] __kasan_record_aux_stack+0x8e/0xa0 [ 81.869867] __call_rcu_common.constprop.0+0x6a/0xb90 [ 81.870550] remove_vma+0x139/0x170 [ 81.871022] do_vmi_align_munmap+0xd4a/0x11f0 [ 81.871607] do_vmi_munmap+0x1f1/0x2b0 [ 81.872126] __vm_munmap+0x138/0x3a0 [ 81.872622] __x64_sys_munmap+0x59/0x80 [ 81.873141] do_syscall_64+0x3f/0x90 [ 81.873639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 81.874307] [ 81.874536] The buggy address belongs to the object at ffff888018f2d488 [ 81.874536] which belongs to the cache vm_area_struct of size 168 [ 81.876075] The buggy address is located 88 bytes inside of [ 81.876075] freed 168-byte region [ffff888018f2d488, ffff888018f2d530) [ 81.877569] [ 81.877794] The buggy address belongs to the physical page: [ 81.878482] page:000000006bd08f22 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f2d [ 81.879651] memcg:ffff888010189701 [ 81.880100] flags: 0x100000000000200(slab|node=0|zone=1) [ 81.880795] page_type: 0xffffffff() [ 81.881264] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 81.882235] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010189701 [ 81.883181] page dumped because: kasan: bad access detected [ 81.883882] [ 81.884112] Memory state around the buggy address: [ 81.884742] ffff888018f2d380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 81.885662] ffff888018f2d400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 81.886560] >ffff888018f2d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 81.887457] ^ [ 81.888252] ffff888018f2d500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 81.889167] ffff888018f2d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 81.890071] ================================================================== [ 81.891099] Disabling lock debugging due to kernel taint [ 84.343977] BUG: Bad rss-counter state mm:00000000966d2e53 type:MM_FILEPAGES val:33 [ 84.344987] BUG: Bad rss-counter state mm:00000000966d2e53 type:MM_ANONPAGES val:22 [ 84.817763] BUG: Bad rss-counter state mm:00000000bd5b0848 type:MM_FILEPAGES val:33 [ 84.818762] BUG: Bad rss-counter state mm:00000000bd5b0848 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10933' (ECDSA) to the list of known hosts. 2023/06/20 04:55:40 fuzzer started 2023/06/20 04:55:41 dialing manager at localhost:44161 2023/06/20 04:55:41 checking machine... 2023/06/20 04:55:41 checking revisions... [ 85.571052] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:55:41 testing simple program... [ 85.623300] cgroup: Unknown subsys name 'net' [ 85.672503] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:54:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=1ffff1100d9c13b4 RCX=ffffffff8122e052 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff888008d71b40 RSP=ffff88806ce09d60 R8 =0000000000000001 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=1ffff1100d9c7479 R12=0000000000000087 R13=ffff888008d72450 R14=ffff888008d71b54 R15=0000000000000001 RIP=ffffffff8124ced3 RFL=00000002 [-------] 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 00007f8970ea3900 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=00007f89702fb680 CR3=000000000c9f0000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=26ff2a042bb4465200000000000ae988 XMM05=f32631863ed9c7e10000000000139798 XMM06=6bb72cfcf5d183be0000000000138538 XMM07=fb795ef6d657705600000000001284b8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff888016999000 RCX=0000000000000000 RDX=1ffff11002d332d6 RSI=ffffffff83871fc8 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff888016c07c80 R8 =0000000000000001 R9 =fffffbfff0b74968 R10=ffffffff85ba4b47 R11=00000000000b6996 R12=ffff88801699950c R13=0000000000000000 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff814c07eb 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 00007f192b833900 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=00007ffcfe92a000 CR3=000000000c6d2000 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