syzkaller login: [ 60.290002] BUG: Bad rss-counter state mm:000000009130ca1b type:MM_FILEPAGES val:33 [ 60.291970] BUG: Bad rss-counter state mm:000000009130ca1b type:MM_ANONPAGES val:22 [ 60.463727] ================================================================== [ 60.464886] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.466274] Read of size 8 at addr ffff8880169735c8 by task sshd/220 [ 60.467098] [ 60.467350] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.468387] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.469534] Call Trace: [ 60.469896] [ 60.470222] dump_stack_lvl+0x91/0xf0 [ 60.470786] print_report+0xcc/0x620 [ 60.471356] ? __virt_addr_valid+0x102/0x340 [ 60.472012] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.472704] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.473401] kasan_report+0xbe/0xf0 [ 60.473959] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.474675] vma_interval_tree_remove+0xc75/0xec0 [ 60.475364] vma_prepare+0xc54/0x11a0 [ 60.475919] __split_vma+0x5af/0x950 [ 60.476470] ? __pfx___split_vma+0x10/0x10 [ 60.477089] ? find_held_lock+0x2c/0x110 [ 60.477703] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.478363] ? lock_is_held_type+0x9f/0x120 [ 60.478992] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.479669] ? mtree_range_walk+0x632/0x900 [ 60.480305] ? mas_walk+0x5c7/0x7c0 [ 60.480875] do_vmi_munmap+0x1f1/0x2b0 [ 60.481447] mmap_region+0x1f9/0x2660 [ 60.482040] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.482627] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.483455] ? __pfx_lock_acquire+0x10/0x10 [ 60.484092] ? __pfx_mmap_region+0x10/0x10 [ 60.484722] ? security_mmap_addr+0x7d/0xa0 [ 60.485337] ? get_unmapped_area+0x1f5/0x3f0 [ 60.485977] do_mmap+0x854/0xf00 [ 60.486500] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.487094] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.487765] ksys_mmap_pgoff+0x3af/0x500 [ 60.488368] do_syscall_64+0x3f/0x90 [ 60.488940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.489703] RIP: 0033:0x7f71d93b2d82 [ 60.490242] 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 [ 60.492719] RSP: 002b:00007ffdf55e4b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.493799] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f71d93b2d82 [ 60.494816] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f71d87ec000 [ 60.495829] RBP: 00007f71d87ec000 R08: 0000000000000009 R09: 0000000000001000 [ 60.496844] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560ed4a4dec0 [ 60.497844] R13: 00007ffdf55e4b60 R14: 00007ffdf55e4b90 R15: 00007ffdf55e4ef0 [ 60.498850] [ 60.499191] [ 60.499445] Allocated by task 213: [ 60.499950] kasan_save_stack+0x22/0x50 [ 60.500540] kasan_set_track+0x25/0x30 [ 60.501116] __kasan_slab_alloc+0x59/0x70 [ 60.501748] kmem_cache_alloc+0x16b/0x370 [ 60.502355] vm_area_dup+0x20/0x160 [ 60.502890] __split_vma+0x170/0x950 [ 60.503438] split_vma+0xc6/0x110 [ 60.503954] mprotect_fixup+0x8d2/0xb30 [ 60.504546] do_mprotect_pkey+0x87e/0xd40 [ 60.505157] __x64_sys_mprotect+0x78/0xc0 [ 60.505788] do_syscall_64+0x3f/0x90 [ 60.506394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.507152] [ 60.507405] Freed by task 213: [ 60.507866] kasan_save_stack+0x22/0x50 [ 60.508458] kasan_set_track+0x25/0x30 [ 60.509039] kasan_save_free_info+0x2b/0x50 [ 60.509695] __kasan_slab_free+0x10a/0x190 [ 60.510323] kmem_cache_free+0x10d/0x4d0 [ 60.510924] rcu_core+0x8c8/0x2860 [ 60.511447] __do_softirq+0x1b7/0x7d4 [ 60.512014] [ 60.512269] Last potentially related work creation: [ 60.512959] kasan_save_stack+0x22/0x50 [ 60.513562] __kasan_record_aux_stack+0x8e/0xa0 [ 60.514239] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.514996] remove_vma+0x139/0x170 [ 60.515524] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.516179] do_vmi_munmap+0x1f1/0x2b0 [ 60.516745] __vm_munmap+0x138/0x3a0 [ 60.517290] __x64_sys_munmap+0x59/0x80 [ 60.517882] do_syscall_64+0x3f/0x90 [ 60.518440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.519198] [ 60.519448] The buggy address belongs to the object at ffff888016973570 [ 60.519448] which belongs to the cache vm_area_struct of size 168 [ 60.521179] The buggy address is located 88 bytes inside of [ 60.521179] freed 168-byte region [ffff888016973570, ffff888016973618) [ 60.522851] [ 60.523106] The buggy address belongs to the physical page: [ 60.523886] page:0000000056d08915 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16973 [ 60.525169] memcg:ffff888016974001 [ 60.525679] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.526436] page_type: 0xffffffff() [ 60.526967] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c7840 dead000000000004 [ 60.528056] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016974001 [ 60.529129] page dumped because: kasan: bad access detected [ 60.529898] [ 60.530144] Memory state around the buggy address: [ 60.530808] ffff888016973480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.531777] ffff888016973500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 60.532781] >ffff888016973580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.533751] ^ [ 60.534502] ffff888016973600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 60.535476] ffff888016973680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.536447] ================================================================== [ 60.537563] Disabling lock debugging due to kernel taint [ 63.079548] BUG: Bad rss-counter state mm:000000000c7cf236 type:MM_FILEPAGES val:33 [ 63.080602] BUG: Bad rss-counter state mm:000000000c7cf236 type:MM_ANONPAGES val:22 [ 63.564960] BUG: Bad rss-counter state mm:00000000b852a013 type:MM_FILEPAGES val:33 [ 63.566216] BUG: Bad rss-counter state mm:00000000b852a013 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34807' (ECDSA) to the list of known hosts. 2023/06/20 13:02:55 fuzzer started 2023/06/20 13:02:55 dialing manager at localhost:36067 2023/06/20 13:02:55 checking machine... 2023/06/20 13:02:55 checking revisions... [ 64.280208] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:02:55 testing simple program... [ 64.322374] cgroup: Unknown subsys name 'net' [ 64.362519] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:02:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff110031f3f5f RSI=ffffffff8180effe RDI=ffff888018f9fb68 RBP=ffff888018f9fb38 RSP=ffff888018f9fa90 R8 =ffffffff86138e90 R9 =ffff888018f9fae0 R10=0000000000038001 R11=0000000000020d8f R12=ffff888018f9fb68 R13=0000000000000000 R14=ffff888015ab1b40 R15=dffffc0000000000 RIP=ffffffff813ad47f RFL=00000282 [--S----] 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 00007eff1d5be900 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=00007ffcfa0e4000 CR3=000000000edac000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=4000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888008d951c0 RSI=0000000000000001 RDI=00000000ffffffff RBP=dffffc0000000000 RSP=ffff888008e07e68 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81279d32 RFL=00000046 [---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 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=00007fc4a815a020 CR3=000000000ca00000 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=5bf15aaa9982838fd845e5d25ab6f8b7 XMM02=ec2efd57dc4c00df000000000011a538 XMM03=1292d8885ec449e7000000000011a608 XMM04=a212b74736187db600000000000ae988 XMM05=d2f1767eba7bab620000000000131e88 XMM06=4fda316b135da52b0000000000131880 XMM07=e042d86d42eb936e0000000000121da0 XMM08=1292d8885ec449e7000000000011a608 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000