syzkaller login: [ 31.632017] BUG: Bad rss-counter state mm:000000005b56467c type:MM_FILEPAGES val:33 [ 31.633268] BUG: Bad rss-counter state mm:000000005b56467c type:MM_ANONPAGES val:22 [ 31.803079] ================================================================== [ 31.804098] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.805130] Read of size 8 at addr ffff88800dd33ed8 by task sshd/218 [ 31.806099] [ 31.806340] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.807283] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.808412] Call Trace: [ 31.808761] [ 31.809070] dump_stack_lvl+0x91/0xf0 [ 31.809611] print_report+0xcc/0x620 [ 31.810142] ? __virt_addr_valid+0x102/0x340 [ 31.810742] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.811422] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.812110] kasan_report+0xbe/0xf0 [ 31.812634] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.813314] vma_interval_tree_remove+0xc75/0xec0 [ 31.813968] vma_prepare+0xc54/0x11a0 [ 31.814478] __split_vma+0x5af/0x950 [ 31.814995] ? __pfx___split_vma+0x10/0x10 [ 31.815573] ? find_held_lock+0x2c/0x110 [ 31.816145] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.816767] ? lock_is_held_type+0x9f/0x120 [ 31.817362] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.818032] ? mtree_range_walk+0x632/0x900 [ 31.818640] ? mas_walk+0x5c7/0x7c0 [ 31.819159] do_vmi_munmap+0x1f1/0x2b0 [ 31.819704] mmap_region+0x1f9/0x2660 [ 31.820251] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.820818] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.821601] ? __pfx_lock_acquire+0x10/0x10 [ 31.822186] ? __pfx_mmap_region+0x10/0x10 [ 31.822766] ? security_mmap_addr+0x7d/0xa0 [ 31.823348] ? get_unmapped_area+0x1f5/0x3f0 [ 31.823961] do_mmap+0x854/0xf00 [ 31.824447] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.824995] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.825611] ksys_mmap_pgoff+0x3af/0x500 [ 31.826174] do_syscall_64+0x3f/0x90 [ 31.826699] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.827417] RIP: 0033:0x7fa683393d82 [ 31.827935] 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 [ 31.830294] RSP: 002b:00007ffe2c894208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.831291] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa683393d82 [ 31.832241] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa6827cd000 [ 31.833183] RBP: 00007fa6827cd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.834116] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d6d7e7ff70 [ 31.835053] R13: 00007ffe2c894220 R14: 00007ffe2c894250 R15: 00007ffe2c8945b0 [ 31.836006] [ 31.836331] [ 31.836566] Allocated by task 211: [ 31.837036] kasan_save_stack+0x22/0x50 [ 31.837588] kasan_set_track+0x25/0x30 [ 31.838133] __kasan_slab_alloc+0x59/0x70 [ 31.838713] kmem_cache_alloc+0x16b/0x370 [ 31.839287] vm_area_dup+0x20/0x160 [ 31.839787] __split_vma+0x170/0x950 [ 31.840314] split_vma+0xc6/0x110 [ 31.840797] mprotect_fixup+0x8d2/0xb30 [ 31.841346] do_mprotect_pkey+0x87e/0xd40 [ 31.841918] __x64_sys_mprotect+0x78/0xc0 [ 31.842496] do_syscall_64+0x3f/0x90 [ 31.843021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.843734] [ 31.843978] Freed by task 211: [ 31.844409] kasan_save_stack+0x22/0x50 [ 31.844961] kasan_set_track+0x25/0x30 [ 31.845496] kasan_save_free_info+0x2b/0x50 [ 31.846084] __kasan_slab_free+0x10a/0x190 [ 31.846671] kmem_cache_free+0x10d/0x4d0 [ 31.847230] rcu_core+0x8c8/0x2860 [ 31.847714] __do_softirq+0x1b7/0x7d4 [ 31.848259] [ 31.848496] Last potentially related work creation: [ 31.849143] kasan_save_stack+0x22/0x50 [ 31.849697] __kasan_record_aux_stack+0x8e/0xa0 [ 31.850326] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.851041] remove_vma+0x139/0x170 [ 31.851534] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.852162] do_vmi_munmap+0x1f1/0x2b0 [ 31.852696] __vm_munmap+0x138/0x3a0 [ 31.853209] __x64_sys_munmap+0x59/0x80 [ 31.853754] do_syscall_64+0x3f/0x90 [ 31.854269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.854953] [ 31.855180] The buggy address belongs to the object at ffff88800dd33e80 [ 31.855180] which belongs to the cache vm_area_struct of size 168 [ 31.856764] The buggy address is located 88 bytes inside of [ 31.856764] freed 168-byte region [ffff88800dd33e80, ffff88800dd33f28) [ 31.858264] [ 31.858492] The buggy address belongs to the physical page: [ 31.859193] page:000000005a121ca9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd33 [ 31.860354] memcg:ffff88800de6cf01 [ 31.860804] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.861559] page_type: 0xffffffff() [ 31.862038] raw: 0100000000000200 ffff8880087a0c80 ffffea000037fb40 dead000000000007 [ 31.863014] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de6cf01 [ 31.863972] page dumped because: kasan: bad access detected [ 31.864673] [ 31.864904] Memory state around the buggy address: [ 31.865514] ffff88800dd33d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.866427] ffff88800dd33e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.867336] >ffff88800dd33e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.868252] ^ [ 31.869024] ffff88800dd33f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.869939] ffff88800dd33f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.870848] ================================================================== [ 31.872055] Disabling lock debugging due to kernel taint [ 34.351682] BUG: Bad rss-counter state mm:000000006f480f68 type:MM_FILEPAGES val:33 [ 34.353029] BUG: Bad rss-counter state mm:000000006f480f68 type:MM_ANONPAGES val:22 [ 34.848182] BUG: Bad rss-counter state mm:00000000544ca427 type:MM_FILEPAGES val:33 [ 34.849187] BUG: Bad rss-counter state mm:00000000544ca427 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52575' (ECDSA) to the list of known hosts. 2023/06/20 21:28:18 fuzzer started 2023/06/20 21:28:18 dialing manager at localhost:36067 2023/06/20 21:28:18 checking machine... 2023/06/20 21:28:18 checking revisions... [ 35.528001] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:28:18 testing simple program... [ 35.576822] cgroup: Unknown subsys name 'net' [ 35.611636] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:28:17 Registers: info registers vcpu 0 RAX=0000000000000018 RBX=00000000000002f1 RCX=ffffffff81f3b9bb RDX=ffff888016410000 RSI=0000000000000000 RDI=0000000000000002 RBP=dffffc0000000000 RSP=ffff888019e7fa38 R8 =0000000000000002 R9 =0000000000000018 R10=0000000000000018 R11=00000000000b6a61 R12=ffff8880114f8e10 R13=00000000000002f1 R14=00000000000002f1 R15=0000000000000018 RIP=ffffffff81f3b9be RFL=00000293 [--S-A-C] 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 00007f378692f900 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=00007f3786ee4650 CR3=00000000101b0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88806cf09a70 RSI=ffffffff8118ddc3 RDI=ffff88806cf09a70 RBP=ffff88806cf09b08 RSP=ffff88806cf09a58 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88806cf09a70 RIP=ffffffff811305e8 RFL=00000202 [-------] 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 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=00007fa0a1a49430 CR3=0000000013ba0000 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=ddf6c4f58d208bb3ab4020f1172f0b27 XMM02=2c67c8bc2e329bc3000000000011a748 XMM03=fb795ef6d657705600000000001214b8 XMM04=70436f84471a781700000000000ae988 XMM05=751b9502027dc0b900000000001310b8 XMM06=1bb0349e85ab455700000000001301a8 XMM07=e042d86d42eb936e0000000000121738 XMM08=5e64571c5aba7785000000000011a7a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000