syzkaller login: [ 29.041729] BUG: Bad rss-counter state mm:000000004f0b9407 type:MM_FILEPAGES val:33 [ 29.042880] BUG: Bad rss-counter state mm:000000004f0b9407 type:MM_ANONPAGES val:22 [ 29.247949] ================================================================== [ 29.249124] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.250365] Read of size 8 at addr ffff88800f3444e0 by task sshd/223 [ 29.251382] [ 29.251801] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.252956] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.254288] Call Trace: [ 29.254705] [ 29.255079] dump_stack_lvl+0x91/0xf0 [ 29.255731] print_report+0xcc/0x620 [ 29.256365] ? __virt_addr_valid+0x102/0x340 [ 29.257094] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.257911] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.258726] kasan_report+0xbe/0xf0 [ 29.259362] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.260184] vma_interval_tree_remove+0xc75/0xec0 [ 29.260980] vma_prepare+0xc54/0x11a0 [ 29.261613] __split_vma+0x5af/0x950 [ 29.262245] ? __pfx___split_vma+0x10/0x10 [ 29.262943] ? find_held_lock+0x2c/0x110 [ 29.263627] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.264382] ? lock_is_held_type+0x9f/0x120 [ 29.265098] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.265998] ? mtree_range_walk+0x632/0x900 [ 29.266687] ? mas_walk+0x5c7/0x7c0 [ 29.267286] do_vmi_munmap+0x1f1/0x2b0 [ 29.267891] mmap_region+0x1f9/0x2660 [ 29.268490] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.269115] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.270027] ? __pfx_lock_acquire+0x10/0x10 [ 29.270569] ? __pfx_mmap_region+0x10/0x10 [ 29.271108] ? security_mmap_addr+0x7d/0xa0 [ 29.271641] ? get_unmapped_area+0x1f5/0x3f0 [ 29.272203] do_mmap+0x854/0xf00 [ 29.272648] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.273151] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.273751] ksys_mmap_pgoff+0x3af/0x500 [ 29.274264] do_syscall_64+0x3f/0x90 [ 29.274751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.275402] RIP: 0033:0x7fc1b9d24d82 [ 29.275866] 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 [ 29.278010] RSP: 002b:00007ffdf2734bd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.278923] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc1b9d24d82 [ 29.279789] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc1b915e000 [ 29.280647] RBP: 00007fc1b915e000 R08: 0000000000000009 R09: 0000000000001000 [ 29.281493] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565156c1cec0 [ 29.282365] R13: 00007ffdf2734bf0 R14: 00007ffdf2734c20 R15: 00007ffdf2734f80 [ 29.283229] [ 29.283521] [ 29.283738] Allocated by task 213: [ 29.284168] kasan_save_stack+0x22/0x50 [ 29.284673] kasan_set_track+0x25/0x30 [ 29.285177] __kasan_slab_alloc+0x59/0x70 [ 29.285708] kmem_cache_alloc+0x16b/0x370 [ 29.286234] vm_area_dup+0x20/0x160 [ 29.286690] __split_vma+0x170/0x950 [ 29.287155] split_vma+0xc6/0x110 [ 29.287604] mprotect_fixup+0x8d2/0xb30 [ 29.288110] do_mprotect_pkey+0x87e/0xd40 [ 29.288643] __x64_sys_mprotect+0x78/0xc0 [ 29.289224] do_syscall_64+0x3f/0x90 [ 29.289727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.290375] [ 29.290591] Freed by task 213: [ 29.290985] kasan_save_stack+0x22/0x50 [ 29.291492] kasan_set_track+0x25/0x30 [ 29.291986] kasan_save_free_info+0x2b/0x50 [ 29.292519] __kasan_slab_free+0x10a/0x190 [ 29.293058] kmem_cache_free+0x10d/0x4d0 [ 29.293569] rcu_core+0x8c8/0x2860 [ 29.294030] __do_softirq+0x1b7/0x7d4 [ 29.294508] [ 29.294725] Last potentially related work creation: [ 29.295306] kasan_save_stack+0x22/0x50 [ 29.295806] __kasan_record_aux_stack+0x8e/0xa0 [ 29.296381] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.297022] remove_vma+0x139/0x170 [ 29.297471] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.298034] do_vmi_munmap+0x1f1/0x2b0 [ 29.298521] __vm_munmap+0x138/0x3a0 [ 29.298989] __x64_sys_munmap+0x59/0x80 [ 29.299498] do_syscall_64+0x3f/0x90 [ 29.299981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.300620] [ 29.300834] Second to last potentially related work creation: [ 29.301521] kasan_save_stack+0x22/0x50 [ 29.302041] __kasan_record_aux_stack+0x8e/0xa0 [ 29.302619] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.303258] remove_vma+0x139/0x170 [ 29.303710] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.304277] do_vmi_munmap+0x1f1/0x2b0 [ 29.304765] mmap_region+0x1f9/0x2660 [ 29.305251] do_mmap+0x854/0xf00 [ 29.305696] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.306183] ksys_mmap_pgoff+0x3af/0x500 [ 29.306684] do_syscall_64+0x3f/0x90 [ 29.307166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.307809] [ 29.308022] The buggy address belongs to the object at ffff88800f344488 [ 29.308022] which belongs to the cache vm_area_struct of size 168 [ 29.309497] The buggy address is located 88 bytes inside of [ 29.309497] freed 168-byte region [ffff88800f344488, ffff88800f344530) [ 29.310923] [ 29.311140] The buggy address belongs to the physical page: [ 29.311806] page:00000000d2f3d0fe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf344 [ 29.312890] memcg:ffff888019e90d01 [ 29.313321] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.314051] page_type: 0xffffffff() [ 29.314504] raw: 0100000000000200 ffff8880087a0c80 ffffea00002ce300 dead000000000003 [ 29.315432] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e90d01 [ 29.316346] page dumped because: kasan: bad access detected [ 29.317015] [ 29.317232] Memory state around the buggy address: [ 29.317826] ffff88800f344380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 29.318695] ffff88800f344400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.319599] >ffff88800f344480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.320501] ^ [ 29.321308] ffff88800f344500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 29.322230] ffff88800f344580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.323150] ================================================================== [ 29.324316] Disabling lock debugging due to kernel taint [ 31.179380] BUG: Bad rss-counter state mm:000000001d365281 type:MM_FILEPAGES val:33 [ 31.180220] BUG: Bad rss-counter state mm:000000001d365281 type:MM_ANONPAGES val:22 [ 31.626561] BUG: Bad rss-counter state mm:000000004fa14d7a type:MM_FILEPAGES val:33 [ 31.627499] BUG: Bad rss-counter state mm:000000004fa14d7a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63252' (ECDSA) to the list of known hosts. 2023/06/20 21:23:46 fuzzer started 2023/06/20 21:23:47 dialing manager at localhost:36067 2023/06/20 21:23:47 checking machine... 2023/06/20 21:23:47 checking revisions... [ 32.339690] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:23:47 testing simple program... [ 32.395978] cgroup: Unknown subsys name 'net' [ 32.462120] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:23:46 Registers: info registers vcpu 0 RAX=ffffffff813782f8 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce09e01 RSI=ffff88806ce09e60 RDI=ffff88806ce09e60 RBP=ffff88806ce09af0 RSP=ffff88806ce09a20 R8 =ffffffff8613897a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09e68 R15=ffff88806ce09a98 RIP=ffffffff8112fbf3 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 00007fc8aed57900 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=00007fc8af30c650 CR3=000000000df2a000 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=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000010172 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff88800be901a0 RSP=ffff8880100673b8 R8 =0000000000000007 R9 =0000000000010000 R10=0000000000010172 R11=0000000000000128 R12=0000000000010172 R13=ffff88800be90050 R14=ffff88800be90048 R15=ffff88800be90060 RIP=ffffffff82191d9e RFL=00000093 [--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 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=00007f4f2243b280 CR3=000000000f0ea000 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=b3275a4852155c98314ebfc5bc48dcc0 XMM02=000000000011b5f8d59e07bde36eea69 XMM03=000000000011b720ec2efd57dc4c00df XMM04=793dca648bed986b00000000000ae988 XMM05=5445f37beee794740000000000134730 XMM06=db20f175d54767f00000000000133520 XMM07=fb795ef6d65770560000000000121cd8 XMM08=2c67c8bc2e329bc3000000000011b720 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000