syzkaller login: [ 38.625450] BUG: Bad rss-counter state mm:0000000037f21884 type:MM_FILEPAGES val:33 [ 38.626537] BUG: Bad rss-counter state mm:0000000037f21884 type:MM_ANONPAGES val:22 [ 38.804321] ================================================================== [ 38.805313] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.806309] Read of size 8 at addr ffff8880098c9140 by task sshd/221 [ 38.807248] [ 38.807507] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.808438] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.809512] Call Trace: [ 38.809852] [ 38.810161] dump_stack_lvl+0x91/0xf0 [ 38.810708] print_report+0xcc/0x620 [ 38.811225] ? __virt_addr_valid+0x102/0x340 [ 38.811818] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.812471] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.813171] kasan_report+0xbe/0xf0 [ 38.813687] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.814368] vma_interval_tree_remove+0xc75/0xec0 [ 38.815024] vma_prepare+0xc54/0x11a0 [ 38.815547] __split_vma+0x5af/0x950 [ 38.816061] ? __pfx___split_vma+0x10/0x10 [ 38.816632] ? find_held_lock+0x2c/0x110 [ 38.817227] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.817848] ? lock_is_held_type+0x9f/0x120 [ 38.818445] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.819104] ? mtree_range_walk+0x632/0x900 [ 38.819702] ? mas_walk+0x5c7/0x7c0 [ 38.820224] do_vmi_munmap+0x1f1/0x2b0 [ 38.820770] mmap_region+0x1f9/0x2660 [ 38.821329] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.821896] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.822701] ? __pfx_lock_acquire+0x10/0x10 [ 38.823286] ? __pfx_mmap_region+0x10/0x10 [ 38.823864] ? security_mmap_addr+0x7d/0xa0 [ 38.824443] ? get_unmapped_area+0x1f5/0x3f0 [ 38.825076] do_mmap+0x854/0xf00 [ 38.825556] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.826102] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.826738] ksys_mmap_pgoff+0x3af/0x500 [ 38.827288] do_syscall_64+0x3f/0x90 [ 38.827810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.828525] RIP: 0033:0x7f7e0a5d3d82 [ 38.829057] 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 [ 38.831403] RSP: 002b:00007fff6f508b58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.832387] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7e0a5d3d82 [ 38.833343] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7e09a0d000 [ 38.834299] RBP: 00007f7e09a0d000 R08: 0000000000000009 R09: 0000000000001000 [ 38.835225] R10: 0000000000000812 R11: 0000000000000206 R12: 00005635edf99f70 [ 38.836152] R13: 00007fff6f508b70 R14: 00007fff6f508ba0 R15: 00007fff6f508f00 [ 38.837138] [ 38.837465] [ 38.837695] Allocated by task 213: [ 38.838165] kasan_save_stack+0x22/0x50 [ 38.838743] kasan_set_track+0x25/0x30 [ 38.839277] __kasan_slab_alloc+0x59/0x70 [ 38.839856] kmem_cache_alloc+0x16b/0x370 [ 38.840423] vm_area_dup+0x20/0x160 [ 38.840945] __split_vma+0x170/0x950 [ 38.841458] split_vma+0xc6/0x110 [ 38.841932] mprotect_fixup+0x8d2/0xb30 [ 38.842484] do_mprotect_pkey+0x87e/0xd40 [ 38.843057] __x64_sys_mprotect+0x78/0xc0 [ 38.843626] do_syscall_64+0x3f/0x90 [ 38.844139] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.844883] [ 38.845121] Freed by task 204: [ 38.845551] kasan_save_stack+0x22/0x50 [ 38.846096] kasan_set_track+0x25/0x30 [ 38.846661] kasan_save_free_info+0x2b/0x50 [ 38.847247] __kasan_slab_free+0x10a/0x190 [ 38.847829] kmem_cache_free+0x10d/0x4d0 [ 38.848431] rcu_core+0x8c8/0x2860 [ 38.848953] __do_softirq+0x1b7/0x7d4 [ 38.849466] [ 38.849695] Last potentially related work creation: [ 38.850329] kasan_save_stack+0x22/0x50 [ 38.850865] __kasan_record_aux_stack+0x8e/0xa0 [ 38.851480] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.852156] remove_vma+0x139/0x170 [ 38.852630] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.853260] do_vmi_munmap+0x1f1/0x2b0 [ 38.853780] __vm_munmap+0x138/0x3a0 [ 38.854301] __x64_sys_munmap+0x59/0x80 [ 38.854842] do_syscall_64+0x3f/0x90 [ 38.855361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.856070] [ 38.856305] The buggy address belongs to the object at ffff8880098c90e8 [ 38.856305] which belongs to the cache vm_area_struct of size 168 [ 38.857947] The buggy address is located 88 bytes inside of [ 38.857947] freed 168-byte region [ffff8880098c90e8, ffff8880098c9190) [ 38.859491] [ 38.859728] The buggy address belongs to the physical page: [ 38.860450] page:0000000033bc74d5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x98c9 [ 38.861662] memcg:ffff888014529101 [ 38.862129] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.862847] page_type: 0xffffffff() [ 38.863330] raw: 0100000000000200 ffff8880087a0c80 ffffea00003842c0 dead000000000004 [ 38.864337] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014529101 [ 38.865358] page dumped because: kasan: bad access detected [ 38.866089] [ 38.866345] Memory state around the buggy address: [ 38.866979] ffff8880098c9000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.867919] ffff8880098c9080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 38.868880] >ffff8880098c9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.869803] ^ [ 38.870516] ffff8880098c9180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 38.871454] ffff8880098c9200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.872392] ================================================================== [ 38.873434] Disabling lock debugging due to kernel taint [ 40.770273] BUG: Bad rss-counter state mm:00000000dc1e0c49 type:MM_FILEPAGES val:33 [ 40.771042] BUG: Bad rss-counter state mm:00000000dc1e0c49 type:MM_ANONPAGES val:22 [ 41.214347] BUG: Bad rss-counter state mm:00000000bb1b324a type:MM_FILEPAGES val:33 [ 41.215615] BUG: Bad rss-counter state mm:00000000bb1b324a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56370' (ECDSA) to the list of known hosts. 2023/06/21 06:21:26 fuzzer started 2023/06/21 06:21:26 dialing manager at localhost:36067 2023/06/21 06:21:26 checking machine... 2023/06/21 06:21:26 checking revisions... [ 42.015736] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:21:27 testing simple program... [ 42.075299] cgroup: Unknown subsys name 'net' [ 42.129827] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:21:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9c135f RSI=ffffffff8181034d RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020caf R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff888019fad1c0 R15=ffff88806ce09a98 RIP=ffffffff81130682 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 00007f16be44e900 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=00007fff84c51000 CR3=0000000019f7a000 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=0000000000000000 RBX=0000564e1057df80 RCX=0000000000000019 RDX=0000000000000d80 RSI=000000000000000a RDI=0000564e1058c760 RBP=00007fff84c56ea0 RSP=00007fff84c56e38 R8 =0000564e1058c759 R9 =00007f16bea00be0 R10=0000000000000100 R11=0000000000000246 R12=00007f16be44e900 R13=00007fff84c56ea8 R14=0000000000000e07 R15=0000000000000000 RIP=00007f16be99da0b RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f16be44e900 00000000 00000000 GS =0000 0000000000000000 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=00007f16be3e3000 CR3=0000000019f7a000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=65737577656e20646e61206464617265 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000000000000000ffffffffffffff XMM08=69682220656874207369203232302023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000