syzkaller login: [ 30.947115] BUG: Bad rss-counter state mm:00000000eaedb4de type:MM_FILEPAGES val:33 [ 30.948137] BUG: Bad rss-counter state mm:00000000eaedb4de type:MM_ANONPAGES val:22 [ 31.117918] ================================================================== [ 31.118892] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.119880] Read of size 8 at addr ffff88800d6965c8 by task sshd/219 [ 31.120848] [ 31.121079] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.121983] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.123060] Call Trace: [ 31.123394] [ 31.123702] dump_stack_lvl+0x91/0xf0 [ 31.124215] print_report+0xcc/0x620 [ 31.124718] ? __virt_addr_valid+0x102/0x340 [ 31.125297] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.125951] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.126609] kasan_report+0xbe/0xf0 [ 31.127141] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.127810] vma_interval_tree_remove+0xc75/0xec0 [ 31.128434] vma_prepare+0xc54/0x11a0 [ 31.128947] __split_vma+0x5af/0x950 [ 31.129449] ? __pfx___split_vma+0x10/0x10 [ 31.130015] ? find_held_lock+0x2c/0x110 [ 31.130549] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.131177] ? lock_is_held_type+0x9f/0x120 [ 31.131758] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.132368] ? mtree_range_walk+0x632/0x900 [ 31.132949] ? mas_walk+0x5c7/0x7c0 [ 31.133453] do_vmi_munmap+0x1f1/0x2b0 [ 31.133975] mmap_region+0x1f9/0x2660 [ 31.134491] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.135077] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.135830] ? __pfx_lock_acquire+0x10/0x10 [ 31.136372] ? __pfx_mmap_region+0x10/0x10 [ 31.136956] ? security_mmap_addr+0x7d/0xa0 [ 31.137501] ? get_unmapped_area+0x1f5/0x3f0 [ 31.138086] do_mmap+0x854/0xf00 [ 31.138543] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.139106] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.139712] ksys_mmap_pgoff+0x3af/0x500 [ 31.140252] do_syscall_64+0x3f/0x90 [ 31.140763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.141447] RIP: 0033:0x7fb7daaded82 [ 31.141933] 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 [ 31.144252] RSP: 002b:00007ffea3d703e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.145207] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb7daaded82 [ 31.146116] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb7d9f18000 [ 31.147043] RBP: 00007fb7d9f18000 R08: 0000000000000009 R09: 0000000000001000 [ 31.147954] R10: 0000000000000812 R11: 0000000000000206 R12: 00005558d3832ec0 [ 31.148874] R13: 00007ffea3d70400 R14: 00007ffea3d70430 R15: 00007ffea3d70790 [ 31.149779] [ 31.150075] [ 31.150292] Allocated by task 212: [ 31.150788] kasan_save_stack+0x22/0x50 [ 31.151318] kasan_set_track+0x25/0x30 [ 31.151854] __kasan_slab_alloc+0x59/0x70 [ 31.152413] kmem_cache_alloc+0x16b/0x370 [ 31.152966] vm_area_dup+0x20/0x160 [ 31.153449] __split_vma+0x170/0x950 [ 31.153964] split_vma+0xc6/0x110 [ 31.154427] mprotect_fixup+0x8d2/0xb30 [ 31.155002] do_mprotect_pkey+0x87e/0xd40 [ 31.155554] __x64_sys_mprotect+0x78/0xc0 [ 31.156106] do_syscall_64+0x3f/0x90 [ 31.156592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.157263] [ 31.157490] Freed by task 209: [ 31.157997] kasan_save_stack+0x22/0x50 [ 31.158674] kasan_set_track+0x25/0x30 [ 31.159330] kasan_save_free_info+0x2b/0x50 [ 31.160033] __kasan_slab_free+0x10a/0x190 [ 31.160738] kmem_cache_free+0x10d/0x4d0 [ 31.161410] rcu_core+0x8c8/0x2860 [ 31.162001] __do_softirq+0x1b7/0x7d4 [ 31.162722] [ 31.162945] Last potentially related work creation: [ 31.163538] kasan_save_stack+0x22/0x50 [ 31.164053] __kasan_record_aux_stack+0x8e/0xa0 [ 31.164625] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.165274] remove_vma+0x139/0x170 [ 31.165735] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.166297] do_vmi_munmap+0x1f1/0x2b0 [ 31.166794] __vm_munmap+0x138/0x3a0 [ 31.167265] __x64_sys_munmap+0x59/0x80 [ 31.167768] do_syscall_64+0x3f/0x90 [ 31.168250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.168901] [ 31.169117] Second to last potentially related work creation: [ 31.169816] kasan_save_stack+0x22/0x50 [ 31.170318] __kasan_record_aux_stack+0x8e/0xa0 [ 31.170905] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.171546] remove_vma+0x139/0x170 [ 31.172003] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.172561] do_vmi_munmap+0x1f1/0x2b0 [ 31.173051] mmap_region+0x1f9/0x2660 [ 31.173535] do_mmap+0x854/0xf00 [ 31.173969] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.174463] ksys_mmap_pgoff+0x3af/0x500 [ 31.174981] do_syscall_64+0x3f/0x90 [ 31.175457] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.176108] [ 31.176324] The buggy address belongs to the object at ffff88800d696570 [ 31.176324] which belongs to the cache vm_area_struct of size 168 [ 31.177811] The buggy address is located 88 bytes inside of [ 31.177811] freed 168-byte region [ffff88800d696570, ffff88800d696618) [ 31.179229] [ 31.179445] The buggy address belongs to the physical page: [ 31.180145] page:00000000c6f5d2ad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd696 [ 31.181251] memcg:ffff88800d692001 [ 31.181694] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.182344] page_type: 0xffffffff() [ 31.182841] raw: 0100000000000200 ffff8880087a0c80 ffffea0000576ec0 dead000000000006 [ 31.183786] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d692001 [ 31.184708] page dumped because: kasan: bad access detected [ 31.185371] [ 31.185587] Memory state around the buggy address: [ 31.186184] ffff88800d696480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.187068] ffff88800d696500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.187955] >ffff88800d696580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.188829] ^ [ 31.189501] ffff88800d696600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.190378] ffff88800d696680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.191260] ================================================================== [ 31.192339] Disabling lock debugging due to kernel taint [ 33.488286] BUG: Bad rss-counter state mm:000000005a559a76 type:MM_FILEPAGES val:33 [ 33.489739] BUG: Bad rss-counter state mm:000000005a559a76 type:MM_ANONPAGES val:22 [ 34.001764] BUG: Bad rss-counter state mm:00000000355abe76 type:MM_FILEPAGES val:33 [ 34.002826] BUG: Bad rss-counter state mm:00000000355abe76 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56781' (ECDSA) to the list of known hosts. 2023/06/20 11:57:29 fuzzer started 2023/06/20 11:57:30 dialing manager at localhost:36067 2023/06/20 11:57:30 checking machine... 2023/06/20 11:57:30 checking revisions... [ 34.763221] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:57:30 testing simple program... [ 34.817115] cgroup: Unknown subsys name 'net' [ 34.856494] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:57:29 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff8614e1ce RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8614e1d0 RBP=ffff888018cf78c8 RSP=ffff888018cf7800 R8 =0000000000000001 R9 =ffff888018cf78b0 R10=0000000000038001 R11=0000000000024621 R12=ffff888018cf78d0 R13=ffff888018cf78b8 R14=ffff888018cf7ca8 R15=ffff888018cf7870 RIP=ffffffff811311f6 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 00007fa49aa0e900 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=00007ffed1e76000 CR3=000000001c9fc000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88801a0a5a10 RBX=ffff88806cf09ee8 RCX=1ffff11003414b42 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffff88806cf09ef8 RBP=0000000000000098 RSP=ffff88806cf09e50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=ffff888008d951c0 R15=ffff88800e99fd90 RIP=ffffffff8137fcd4 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 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=00007f045fc4b890 CR3=000000000fbea000 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=2039323a37353a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a37353a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000