syzkaller login: [ 68.889648] BUG: Bad rss-counter state mm:00000000c4bcc725 type:MM_FILEPAGES val:33 [ 68.890816] BUG: Bad rss-counter state mm:00000000c4bcc725 type:MM_ANONPAGES val:22 [ 68.929433] ================================================================== [ 68.930432] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.931414] Read of size 8 at addr ffff888016ed04e0 by task sshd/225 [ 68.932225] [ 68.932448] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 68.933323] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.934511] Call Trace: [ 68.934897] [ 68.935229] dump_stack_lvl+0x91/0xf0 [ 68.935809] print_report+0xcc/0x620 [ 68.936381] ? __virt_addr_valid+0x102/0x340 [ 68.937056] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.937775] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.938494] kasan_report+0xbe/0xf0 [ 68.939053] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.939784] vma_interval_tree_remove+0xc75/0xec0 [ 68.940487] vma_prepare+0xc54/0x11a0 [ 68.941066] __split_vma+0x5af/0x950 [ 68.941630] ? __pfx___split_vma+0x10/0x10 [ 68.942263] ? find_held_lock+0x2c/0x110 [ 68.942883] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.943550] ? lock_is_held_type+0x9f/0x120 [ 68.944189] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.944908] ? mtree_range_walk+0x632/0x900 [ 68.945556] ? mas_walk+0x5c7/0x7c0 [ 68.946140] do_vmi_munmap+0x1f1/0x2b0 [ 68.946738] mmap_region+0x1f9/0x2660 [ 68.947323] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.947943] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.948838] ? __pfx_lock_acquire+0x10/0x10 [ 68.949447] ? __pfx_mmap_region+0x10/0x10 [ 68.949983] ? security_mmap_addr+0x7d/0xa0 [ 68.950508] ? get_unmapped_area+0x1f5/0x3f0 [ 68.951060] do_mmap+0x854/0xf00 [ 68.951500] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.951991] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.952556] ksys_mmap_pgoff+0x3af/0x500 [ 68.953070] do_syscall_64+0x3f/0x90 [ 68.953559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.954196] RIP: 0033:0x7f7e2b281d82 [ 68.954660] 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 [ 68.956802] RSP: 002b:00007ffcb93f0ca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.957722] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7e2b281d82 [ 68.958572] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7e2a6bb000 [ 68.959417] RBP: 00007f7e2a6bb000 R08: 0000000000000009 R09: 0000000000001000 [ 68.960264] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564878d22ec0 [ 68.961138] R13: 00007ffcb93f0cc0 R14: 00007ffcb93f0cf0 R15: 00007ffcb93f1050 [ 68.962003] [ 68.962292] [ 68.962512] Allocated by task 218: [ 68.962938] kasan_save_stack+0x22/0x50 [ 68.963453] kasan_set_track+0x25/0x30 [ 68.963950] __kasan_slab_alloc+0x59/0x70 [ 68.964477] kmem_cache_alloc+0x16b/0x370 [ 68.964998] vm_area_dup+0x20/0x160 [ 68.965450] __split_vma+0x170/0x950 [ 68.965911] split_vma+0xc6/0x110 [ 68.966355] mprotect_fixup+0x8d2/0xb30 [ 68.966865] do_mprotect_pkey+0x87e/0xd40 [ 68.967379] __x64_sys_mprotect+0x78/0xc0 [ 68.967899] do_syscall_64+0x3f/0x90 [ 68.968376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.969032] [ 68.969249] Freed by task 19: [ 68.969641] kasan_save_stack+0x22/0x50 [ 68.970141] kasan_set_track+0x25/0x30 [ 68.970635] kasan_save_free_info+0x2b/0x50 [ 68.971168] __kasan_slab_free+0x10a/0x190 [ 68.971703] kmem_cache_free+0x10d/0x4d0 [ 68.972204] rcu_core+0x8c8/0x2860 [ 68.972659] __do_softirq+0x1b7/0x7d4 [ 68.973148] [ 68.973367] Last potentially related work creation: [ 68.973952] kasan_save_stack+0x22/0x50 [ 68.974452] __kasan_record_aux_stack+0x8e/0xa0 [ 68.975022] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.975662] remove_vma+0x139/0x170 [ 68.976115] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.976669] do_vmi_munmap+0x1f1/0x2b0 [ 68.977170] __vm_munmap+0x138/0x3a0 [ 68.977641] __x64_sys_munmap+0x59/0x80 [ 68.978135] do_syscall_64+0x3f/0x90 [ 68.978614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.979263] [ 68.979480] The buggy address belongs to the object at ffff888016ed0488 [ 68.979480] which belongs to the cache vm_area_struct of size 168 [ 68.980945] The buggy address is located 88 bytes inside of [ 68.980945] freed 168-byte region [ffff888016ed0488, ffff888016ed0530) [ 68.982335] [ 68.982555] The buggy address belongs to the physical page: [ 68.983208] page:000000008ea783c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ed0 [ 68.984296] memcg:ffff88801021c401 [ 68.984719] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.985393] page_type: 0xffffffff() [ 68.985843] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 68.986765] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801021c401 [ 68.987682] page dumped because: kasan: bad access detected [ 68.988335] [ 68.988550] Memory state around the buggy address: [ 68.989148] ffff888016ed0380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.990015] ffff888016ed0400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 68.990873] >ffff888016ed0480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.991717] ^ [ 68.992472] ffff888016ed0500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 68.993323] ffff888016ed0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.994169] ================================================================== [ 68.995227] Disabling lock debugging due to kernel taint [ 71.261033] BUG: Bad rss-counter state mm:00000000b495ab02 type:MM_FILEPAGES val:33 [ 71.261794] BUG: Bad rss-counter state mm:00000000b495ab02 type:MM_ANONPAGES val:22 [ 71.684928] BUG: Bad rss-counter state mm:0000000072d988db type:MM_FILEPAGES val:33 [ 71.685654] BUG: Bad rss-counter state mm:0000000072d988db type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2966' (ECDSA) to the list of known hosts. 2023/06/21 01:04:35 fuzzer started 2023/06/21 01:04:36 dialing manager at localhost:36067 2023/06/21 01:04:36 checking machine... 2023/06/21 01:04:36 checking revisions... [ 72.365866] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:04:36 testing simple program... [ 72.409086] cgroup: Unknown subsys name 'net' [ 72.456651] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:04:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11001e34919 RSI=ffffffff83650f63 RDI=ffff88800f1a48c8 RBP=ffff88800f1a3680 RSP=ffff888019f2fd70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888017ff3800 R13=ffff88800c5a7000 R14=0000000000000001 R15=0000000000000024 RIP=ffffffff84511dc4 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 00007f4d31b3b900 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=00007f4d320f0650 CR3=000000000c4d0000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f1afcd6ce98 CR3=000000000f5fe000 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=ff69009b02f8f093c64eb0369ae77c66 XMM02=ec2efd57dc4c00df000000000011ac78 XMM03=c22f2678a1dfd243000000000011ad48 XMM04=23de032825d535f700000000000ae988 XMM05=6860aeb314f8829d0000000000132378 XMM06=df599d82cd20e71f0000000000131550 XMM07=e042d86d42eb936e0000000000122138 XMM08=c22f2678a1dfd243000000000011ad48 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000