syzkaller login: [ 30.543366] BUG: Bad rss-counter state mm:00000000b39e9573 type:MM_FILEPAGES val:33 [ 30.552938] BUG: Bad rss-counter state mm:00000000b39e9573 type:MM_ANONPAGES val:22 [ 30.754986] ================================================================== [ 30.755614] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.756231] Read of size 8 at addr ffff88800e82e058 by task sshd/223 [ 30.756714] [ 30.756854] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.757397] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.758048] Call Trace: [ 30.758247] [ 30.758427] dump_stack_lvl+0x91/0xf0 [ 30.758777] print_report+0xcc/0x620 [ 30.759136] ? __virt_addr_valid+0x102/0x340 [ 30.759489] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.763947] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.764350] kasan_report+0xbe/0xf0 [ 30.764665] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.765109] vma_interval_tree_remove+0xc75/0xec0 [ 30.765501] vma_prepare+0xc54/0x11a0 [ 30.765820] __split_vma+0x5af/0x950 [ 30.766131] ? __pfx___split_vma+0x10/0x10 [ 30.766477] ? find_held_lock+0x2c/0x110 [ 30.766821] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.767186] ? lock_is_held_type+0x9f/0x120 [ 30.767539] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.772006] ? mtree_range_walk+0x632/0x900 [ 30.772372] ? mas_walk+0x5c7/0x7c0 [ 30.772699] do_vmi_munmap+0x1f1/0x2b0 [ 30.773059] mmap_region+0x1f9/0x2660 [ 30.773380] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.773756] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.774221] ? __pfx_lock_acquire+0x10/0x10 [ 30.774570] ? __pfx_mmap_region+0x10/0x10 [ 30.774966] ? security_mmap_addr+0x7d/0xa0 [ 30.775320] ? get_unmapped_area+0x1f5/0x3f0 [ 30.775735] do_mmap+0x854/0xf00 [ 30.776053] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.776406] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.776804] ksys_mmap_pgoff+0x3af/0x500 [ 30.777167] do_syscall_64+0x3f/0x90 [ 30.777511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.778012] RIP: 0033:0x7fdcce1a3d82 [ 30.778341] 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 [ 30.779921] RSP: 002b:00007ffe6f073ac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.780563] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdcce1a3d82 [ 30.781187] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdccd5dd000 [ 30.781819] RBP: 00007fdccd5dd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.782429] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d79c1dfec0 [ 30.783061] R13: 00007ffe6f073ae0 R14: 00007ffe6f073b10 R15: 00007ffe6f073e70 [ 30.783695] [ 30.783949] [ 30.784106] Allocated by task 214: [ 30.784411] kasan_save_stack+0x22/0x50 [ 30.784807] kasan_set_track+0x25/0x30 [ 30.785166] __kasan_slab_alloc+0x59/0x70 [ 30.785530] kmem_cache_alloc+0x16b/0x370 [ 30.785901] vm_area_dup+0x20/0x160 [ 30.786218] __split_vma+0x170/0x950 [ 30.786548] split_vma+0xc6/0x110 [ 30.786899] mprotect_fixup+0x8d2/0xb30 [ 30.787241] do_mprotect_pkey+0x87e/0xd40 [ 30.787598] __x64_sys_mprotect+0x78/0xc0 [ 30.787968] do_syscall_64+0x3f/0x90 [ 30.788280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.788704] [ 30.788883] Freed by task 214: [ 30.789142] kasan_save_stack+0x22/0x50 [ 30.789472] kasan_set_track+0x25/0x30 [ 30.789829] kasan_save_free_info+0x2b/0x50 [ 30.790176] __kasan_slab_free+0x10a/0x190 [ 30.790522] kmem_cache_free+0x10d/0x4d0 [ 30.790899] rcu_core+0x8c8/0x2860 [ 30.791197] __do_softirq+0x1b7/0x7d4 [ 30.791509] [ 30.791736] Last potentially related work creation: [ 30.792115] kasan_save_stack+0x22/0x50 [ 30.792441] __kasan_record_aux_stack+0x8e/0xa0 [ 30.792837] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.793260] remove_vma+0x139/0x170 [ 30.793551] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.793943] do_vmi_munmap+0x1f1/0x2b0 [ 30.794259] __vm_munmap+0x138/0x3a0 [ 30.794568] __x64_sys_munmap+0x59/0x80 [ 30.794942] do_syscall_64+0x3f/0x90 [ 30.795260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.795752] [ 30.795911] The buggy address belongs to the object at ffff88800e82e000 [ 30.795911] which belongs to the cache vm_area_struct of size 168 [ 30.796990] The buggy address is located 88 bytes inside of [ 30.796990] freed 168-byte region [ffff88800e82e000, ffff88800e82e0a8) [ 30.797984] [ 30.798136] The buggy address belongs to the physical page: [ 30.798598] page:00000000d3c19419 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe82e [ 30.799407] memcg:ffff88800e74d601 [ 30.799747] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.800206] page_type: 0xffffffff() [ 30.800524] raw: 0100000000000200 ffff8880087a0c80 ffffea00003aa640 dead000000000004 [ 30.801222] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e74d601 [ 30.801883] page dumped because: kasan: bad access detected [ 30.802348] [ 30.802498] Memory state around the buggy address: [ 30.802943] ffff88800e82df00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.803554] ffff88800e82df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.804188] >ffff88800e82e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.804807] ^ [ 30.805331] ffff88800e82e080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 30.805966] ffff88800e82e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.806553] ================================================================== [ 30.807736] Disabling lock debugging due to kernel taint [ 35.324624] BUG: Bad rss-counter state mm:00000000ccd1612e type:MM_FILEPAGES val:33 [ 35.327837] BUG: Bad rss-counter state mm:00000000ccd1612e type:MM_ANONPAGES val:22 [ 36.148621] BUG: Bad rss-counter state mm:00000000dadd5d37 type:MM_FILEPAGES val:33 [ 36.156137] BUG: Bad rss-counter state mm:00000000dadd5d37 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63061' (ECDSA) to the list of known hosts. 2023/06/21 10:00:16 fuzzer started 2023/06/21 10:00:17 dialing manager at localhost:36067 2023/06/21 10:00:17 checking machine... 2023/06/21 10:00:17 checking revisions... [ 37.119704] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:00:17 testing simple program... [ 37.176147] cgroup: Unknown subsys name 'net' [ 37.271172] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:00:16 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801479f448 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88801479f438 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e97 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 00007f412de4b900 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=00007f31f41e3328 CR3=000000000e3c4000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 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=1ffff110028c7f04 RSI=ffff88801463ff30 RDI=ffff88801463f820 RBP=ffff88801463f8b8 RSP=ffff88801463f808 R8 =0000000000000001 R9 =ffff88801463f860 R10=0000000000038001 R11=000000000000774d R12=ffff88801463f8e8 R13=0000000000000000 R14=ffff888018fd3680 R15=ffff88800ea51800 RIP=ffffffff81130357 RFL=00000012 [----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 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=00007f9719120bc0 CR3=000000000dade000 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=2036313a30303a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3333 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3333325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a30303a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000