syzkaller login: [ 30.460256] BUG: Bad rss-counter state mm:00000000af92cffa type:MM_FILEPAGES val:33 [ 30.461202] BUG: Bad rss-counter state mm:00000000af92cffa type:MM_ANONPAGES val:22 [ 30.572136] ================================================================== [ 30.572885] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.573585] Read of size 8 at addr ffff888016c973f8 by task sshd/221 [ 30.574150] [ 30.574313] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.574957] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.575667] Call Trace: [ 30.575903] [ 30.576271] dump_stack_lvl+0x91/0xf0 [ 30.576684] print_report+0xcc/0x620 [ 30.577053] ? __virt_addr_valid+0x102/0x340 [ 30.577466] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.577923] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.578422] kasan_report+0xbe/0xf0 [ 30.578779] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.579252] vma_interval_tree_remove+0xc75/0xec0 [ 30.579695] vma_prepare+0xc54/0x11a0 [ 30.580051] __split_vma+0x5af/0x950 [ 30.580396] ? __pfx___split_vma+0x10/0x10 [ 30.580794] ? find_held_lock+0x2c/0x110 [ 30.581185] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.581610] ? lock_is_held_type+0x9f/0x120 [ 30.582010] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.582449] ? mtree_range_walk+0x632/0x900 [ 30.582861] ? mas_walk+0x5c7/0x7c0 [ 30.583217] do_vmi_munmap+0x1f1/0x2b0 [ 30.583593] mmap_region+0x1f9/0x2660 [ 30.583950] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.584335] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.584895] ? __pfx_lock_acquire+0x10/0x10 [ 30.585297] ? __pfx_mmap_region+0x10/0x10 [ 30.585691] ? security_mmap_addr+0x7d/0xa0 [ 30.586089] ? get_unmapped_area+0x1f5/0x3f0 [ 30.586506] do_mmap+0x854/0xf00 [ 30.586835] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.587208] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.587631] ksys_mmap_pgoff+0x3af/0x500 [ 30.588007] do_syscall_64+0x3f/0x90 [ 30.588355] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.588900] RIP: 0033:0x7f9da5751d82 [ 30.589238] 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 [ 30.590831] RSP: 002b:00007ffe94b09a68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.591526] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9da5751d82 [ 30.592154] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9da4b8b000 [ 30.592824] RBP: 00007f9da4b8b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.593457] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557aa4707ec0 [ 30.594095] R13: 00007ffe94b09a80 R14: 00007ffe94b09ab0 R15: 00007ffe94b09e10 [ 30.594730] [ 30.594942] [ 30.595108] Allocated by task 214: [ 30.595439] kasan_save_stack+0x22/0x50 [ 30.595812] kasan_set_track+0x25/0x30 [ 30.596190] __kasan_slab_alloc+0x59/0x70 [ 30.596605] kmem_cache_alloc+0x16b/0x370 [ 30.597004] vm_area_dup+0x20/0x160 [ 30.597335] __split_vma+0x170/0x950 [ 30.597672] split_vma+0xc6/0x110 [ 30.597990] mprotect_fixup+0x8d2/0xb30 [ 30.598352] do_mprotect_pkey+0x87e/0xd40 [ 30.598727] __x64_sys_mprotect+0x78/0xc0 [ 30.599113] do_syscall_64+0x3f/0x90 [ 30.599476] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.599971] [ 30.600129] Freed by task 214: [ 30.600431] kasan_save_stack+0x22/0x50 [ 30.600837] kasan_set_track+0x25/0x30 [ 30.601204] kasan_save_free_info+0x2b/0x50 [ 30.601600] __kasan_slab_free+0x10a/0x190 [ 30.601995] kmem_cache_free+0x10d/0x4d0 [ 30.602400] rcu_core+0x8c8/0x2860 [ 30.602724] __do_softirq+0x1b7/0x7d4 [ 30.603076] [ 30.603235] Last potentially related work creation: [ 30.603662] kasan_save_stack+0x22/0x50 [ 30.604050] __kasan_record_aux_stack+0x8e/0xa0 [ 30.604484] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.605006] remove_vma+0x139/0x170 [ 30.605346] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.605752] do_vmi_munmap+0x1f1/0x2b0 [ 30.606120] __vm_munmap+0x138/0x3a0 [ 30.606466] __x64_sys_munmap+0x59/0x80 [ 30.606835] do_syscall_64+0x3f/0x90 [ 30.607194] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.607683] [ 30.607865] The buggy address belongs to the object at ffff888016c973a0 [ 30.607865] which belongs to the cache vm_area_struct of size 168 [ 30.609041] The buggy address is located 88 bytes inside of [ 30.609041] freed 168-byte region [ffff888016c973a0, ffff888016c97448) [ 30.610064] [ 30.610230] The buggy address belongs to the physical page: [ 30.610730] page:00000000fced1cd9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c97 [ 30.611590] memcg:ffff8880097aff01 [ 30.611906] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.612383] page_type: 0xffffffff() [ 30.612721] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.613456] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097aff01 [ 30.614132] page dumped because: kasan: bad access detected [ 30.614636] [ 30.614790] Memory state around the buggy address: [ 30.615229] ffff888016c97280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.615855] ffff888016c97300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.616484] >ffff888016c97380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.617130] ^ [ 30.617878] ffff888016c97400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.618503] ffff888016c97480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.619137] ================================================================== [ 30.619843] Disabling lock debugging due to kernel taint [ 31.994467] BUG: Bad rss-counter state mm:000000004669eed0 type:MM_FILEPAGES val:33 [ 31.995621] BUG: Bad rss-counter state mm:000000004669eed0 type:MM_ANONPAGES val:22 [ 32.387409] BUG: Bad rss-counter state mm:000000002a5a0e63 type:MM_FILEPAGES val:33 [ 32.388163] BUG: Bad rss-counter state mm:000000002a5a0e63 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56268' (ECDSA) to the list of known hosts. 2023/06/21 09:10:14 fuzzer started 2023/06/21 09:10:15 dialing manager at localhost:36067 2023/06/21 09:10:15 checking machine... 2023/06/21 09:10:15 checking revisions... [ 33.017209] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:10:15 testing simple program... [ 33.062314] cgroup: Unknown subsys name 'net' [ 33.097712] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:10:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8367562e RDX=0000000000026756 RSI=0000000000026756 RDI=ffffffff86583748 RBP=ffff8880103a7578 RSP=ffff8880103a74b0 R8 =0000000000000000 R9 =ffff8880103a7560 R10=0000000000038001 R11=0000000000020d09 R12=ffff8880103a7580 R13=ffff8880103a7568 R14=ffff8880103a7561 R15=ffff8880103a7520 RIP=ffffffff8113077a RFL=00000212 [----A--] 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 00007f3a0d9db900 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=00007fddfe22d650 CR3=000000000d9ba000 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=a5318ec8bd9360bc214b9f0649c9ef18 XMM02=ec2efd57dc4c00df000000000011ac40 XMM03=563babbd404479cd000000000011ad10 XMM04=a1cd865b03e3085900000000000ae988 XMM05=6896a079ac66d96d0000000000133038 XMM06=c291bd5c70af25b90000000000131e28 XMM07=fb795ef6d65770560000000000122150 XMM08=2c67c8bc2e329bc3000000000011acb0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffd25b2c2a8 CR3=0000000005482000 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=00007f1fed3e751000005568802a2790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000