syzkaller login: [ 58.927184] BUG: Bad rss-counter state mm:00000000417d6102 type:MM_FILEPAGES val:33 [ 58.928500] BUG: Bad rss-counter state mm:00000000417d6102 type:MM_ANONPAGES val:22 [ 58.973618] ================================================================== [ 58.974609] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 58.975559] Read of size 8 at addr ffff88801820f5c8 by task sshd/220 [ 58.976335] [ 58.976561] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 58.977444] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 58.978474] Call Trace: [ 58.978801] [ 58.979086] dump_stack_lvl+0x91/0xf0 [ 58.979586] print_report+0xcc/0x620 [ 58.980080] ? __virt_addr_valid+0x102/0x340 [ 58.980625] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.981262] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.981904] kasan_report+0xbe/0xf0 [ 58.982406] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.983037] vma_interval_tree_remove+0xc75/0xec0 [ 58.983658] vma_prepare+0xc54/0x11a0 [ 58.984144] __split_vma+0x5af/0x950 [ 58.984622] ? __pfx___split_vma+0x10/0x10 [ 58.985157] ? find_held_lock+0x2c/0x110 [ 58.985698] do_vmi_align_munmap+0x2ba/0x11f0 [ 58.986261] ? lock_is_held_type+0x9f/0x120 [ 58.986801] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 58.987399] ? mtree_range_walk+0x632/0x900 [ 58.987949] ? mas_walk+0x5c7/0x7c0 [ 58.988425] do_vmi_munmap+0x1f1/0x2b0 [ 58.988916] mmap_region+0x1f9/0x2660 [ 58.989403] ? vm_mmap_pgoff+0x15c/0x3a0 [ 58.989918] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 58.990635] ? __pfx_lock_acquire+0x10/0x10 [ 58.991164] ? __pfx_mmap_region+0x10/0x10 [ 58.991696] ? security_mmap_addr+0x7d/0xa0 [ 58.992231] ? get_unmapped_area+0x1f5/0x3f0 [ 58.992798] do_mmap+0x854/0xf00 [ 58.993239] vm_mmap_pgoff+0x1a6/0x3a0 [ 58.993761] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 58.994325] ksys_mmap_pgoff+0x3af/0x500 [ 58.994847] do_syscall_64+0x3f/0x90 [ 58.995332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.995984] RIP: 0033:0x7f4196b8cd82 [ 58.996435] 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 [ 58.998590] RSP: 002b:00007ffc63d88498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 58.999709] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4196b8cd82 [ 59.000613] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4195fc6000 [ 59.001517] RBP: 00007f4195fc6000 R08: 0000000000000009 R09: 0000000000001000 [ 59.002418] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d5b06ead90 [ 59.003304] R13: 00007ffc63d884b0 R14: 00007ffc63d884e0 R15: 00007ffc63d88840 [ 59.004200] [ 59.004499] [ 59.004724] Allocated by task 213: [ 59.005173] kasan_save_stack+0x22/0x50 [ 59.005721] kasan_set_track+0x25/0x30 [ 59.006235] __kasan_slab_alloc+0x59/0x70 [ 59.006780] kmem_cache_alloc+0x16b/0x370 [ 59.007320] vm_area_dup+0x20/0x160 [ 59.007803] __split_vma+0x170/0x950 [ 59.008302] split_vma+0xc6/0x110 [ 59.008765] mprotect_fixup+0x8d2/0xb30 [ 59.009284] do_mprotect_pkey+0x87e/0xd40 [ 59.009837] __x64_sys_mprotect+0x78/0xc0 [ 59.010383] do_syscall_64+0x3f/0x90 [ 59.010878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.011555] [ 59.011783] Freed by task 213: [ 59.012191] kasan_save_stack+0x22/0x50 [ 59.012715] kasan_set_track+0x25/0x30 [ 59.013227] kasan_save_free_info+0x2b/0x50 [ 59.013808] __kasan_slab_free+0x10a/0x190 [ 59.014357] kmem_cache_free+0x10d/0x4d0 [ 59.014880] rcu_core+0x8c8/0x2860 [ 59.015347] __do_softirq+0x1b7/0x7d4 [ 59.015850] [ 59.016071] Last potentially related work creation: [ 59.016682] kasan_save_stack+0x22/0x50 [ 59.017206] __kasan_record_aux_stack+0x8e/0xa0 [ 59.017819] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.018484] remove_vma+0x139/0x170 [ 59.018953] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.019529] do_vmi_munmap+0x1f1/0x2b0 [ 59.020030] __vm_munmap+0x138/0x3a0 [ 59.020516] __x64_sys_munmap+0x59/0x80 [ 59.021030] do_syscall_64+0x3f/0x90 [ 59.021527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.022211] [ 59.022439] The buggy address belongs to the object at ffff88801820f570 [ 59.022439] which belongs to the cache vm_area_struct of size 168 [ 59.023976] The buggy address is located 88 bytes inside of [ 59.023976] freed 168-byte region [ffff88801820f570, ffff88801820f618) [ 59.025438] [ 59.025681] The buggy address belongs to the physical page: [ 59.026382] page:0000000034c22a10 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1820f [ 59.027539] memcg:ffff88800d8f8f01 [ 59.027981] flags: 0x100000000000200(slab|node=0|zone=1) [ 59.028663] page_type: 0xffffffff() [ 59.029132] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 59.030108] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8f8f01 [ 59.031062] page dumped because: kasan: bad access detected [ 59.031752] [ 59.031976] Memory state around the buggy address: [ 59.032580] ffff88801820f480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 59.033471] ffff88801820f500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 59.034384] >ffff88801820f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.035278] ^ [ 59.035988] ffff88801820f600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 59.036877] ffff88801820f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.037774] ================================================================== [ 59.038969] Disabling lock debugging due to kernel taint [ 60.945589] BUG: Bad rss-counter state mm:00000000a2749ffa type:MM_FILEPAGES val:33 [ 60.946880] BUG: Bad rss-counter state mm:00000000a2749ffa type:MM_ANONPAGES val:22 [ 61.417874] BUG: Bad rss-counter state mm:000000000b6579c5 type:MM_FILEPAGES val:33 [ 61.419037] BUG: Bad rss-counter state mm:000000000b6579c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24722' (ECDSA) to the list of known hosts. 2023/06/20 03:44:51 fuzzer started 2023/06/20 03:44:51 dialing manager at localhost:44161 2023/06/20 03:44:51 checking machine... 2023/06/20 03:44:51 checking revisions... [ 62.108916] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:44:52 testing simple program... [ 62.160166] cgroup: Unknown subsys name 'net' [ 62.210677] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:44:23 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=1ffff1100d9c1329 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88806ce09938 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b5420 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e5d RFL=00000212 [----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 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=00007f01c3e87020 CR3=00000000098a8000 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=da8d3ff475abf29a4b4c1c11089a1d44 XMM02=ec2efd57dc4c00df000000000011c8c8 XMM03=14a3fefaa02f7e89000000000011c998 XMM04=ce324fd72eeb522500000000000ae988 XMM05=436499a551ba487b0000000000133e88 XMM06=4fda316b135da52b0000000000133880 XMM07=e042d86d42eb936e0000000000124078 XMM08=14a3fefaa02f7e89000000000011c998 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888008f64000 RCX=ffffffff818d9769 RDX=1ffff1100332c59d RSI=0000000000000004 RDI=ffff888019962c1c RBP=ffff888019962900 RSP=ffff88801835fd80 R8 =0000000000000001 R9 =ffffed100332c561 R10=ffff888019962b0f R11=0000000000000000 R12=ffff888008f64028 R13=ffff888019962c1c R14=ffff888019962b28 R15=0000000000000000 RIP=ffffffff8180fd58 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 00007fb7f109c900 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=00007fff6da96000 CR3=0000000016476000 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=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