syzkaller login: [ 35.705778] BUG: Bad rss-counter state mm:000000002cbeb775 type:MM_FILEPAGES val:33 [ 35.707115] BUG: Bad rss-counter state mm:000000002cbeb775 type:MM_ANONPAGES val:22 [ 35.749476] ================================================================== [ 35.750403] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.751334] Read of size 8 at addr ffff88800d9ca058 by task sshd/220 [ 35.752189] [ 35.752466] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.753327] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.754307] Call Trace: [ 35.754644] [ 35.754927] dump_stack_lvl+0x91/0xf0 [ 35.755414] print_report+0xcc/0x620 [ 35.755894] ? __virt_addr_valid+0x102/0x340 [ 35.756437] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.757049] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.757659] kasan_report+0xbe/0xf0 [ 35.758141] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.758750] vma_interval_tree_remove+0xc75/0xec0 [ 35.759347] vma_prepare+0xc54/0x11a0 [ 35.759822] __split_vma+0x5af/0x950 [ 35.760290] ? __pfx___split_vma+0x10/0x10 [ 35.760812] ? find_held_lock+0x2c/0x110 [ 35.761327] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.761907] ? lock_is_held_type+0x9f/0x120 [ 35.762446] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.763049] ? mtree_range_walk+0x632/0x900 [ 35.763597] ? mas_walk+0x5c7/0x7c0 [ 35.764072] do_vmi_munmap+0x1f1/0x2b0 [ 35.764567] mmap_region+0x1f9/0x2660 [ 35.765046] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.765557] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.766273] ? __pfx_lock_acquire+0x10/0x10 [ 35.766803] ? __pfx_mmap_region+0x10/0x10 [ 35.767332] ? security_mmap_addr+0x7d/0xa0 [ 35.767856] ? get_unmapped_area+0x1f5/0x3f0 [ 35.768403] do_mmap+0x854/0xf00 [ 35.768840] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.769329] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.769881] ksys_mmap_pgoff+0x3af/0x500 [ 35.770403] do_syscall_64+0x3f/0x90 [ 35.770874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.771526] RIP: 0033:0x7f0c2a701d82 [ 35.771980] 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 [ 35.774107] RSP: 002b:00007fff9a26b718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.775007] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0c2a701d82 [ 35.775853] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0c29b3b000 [ 35.776693] RBP: 00007f0c29b3b000 R08: 0000000000000009 R09: 0000000000001000 [ 35.777539] R10: 0000000000000812 R11: 0000000000000206 R12: 000055954a2efec0 [ 35.778382] R13: 00007fff9a26b730 R14: 00007fff9a26b760 R15: 00007fff9a26bac0 [ 35.779242] [ 35.779533] [ 35.779745] Allocated by task 213: [ 35.780169] kasan_save_stack+0x22/0x50 [ 35.780672] kasan_set_track+0x25/0x30 [ 35.781161] __kasan_slab_alloc+0x59/0x70 [ 35.781683] kmem_cache_alloc+0x16b/0x370 [ 35.782218] vm_area_dup+0x20/0x160 [ 35.782670] __split_vma+0x170/0x950 [ 35.783133] split_vma+0xc6/0x110 [ 35.783568] mprotect_fixup+0x8d2/0xb30 [ 35.784070] do_mprotect_pkey+0x87e/0xd40 [ 35.784589] __x64_sys_mprotect+0x78/0xc0 [ 35.785116] do_syscall_64+0x3f/0x90 [ 35.785588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.786231] [ 35.786443] Freed by task 213: [ 35.786836] kasan_save_stack+0x22/0x50 [ 35.787335] kasan_set_track+0x25/0x30 [ 35.787822] kasan_save_free_info+0x2b/0x50 [ 35.788357] __kasan_slab_free+0x10a/0x190 [ 35.788882] kmem_cache_free+0x10d/0x4d0 [ 35.789391] rcu_core+0x8c8/0x2860 [ 35.789835] __do_softirq+0x1b7/0x7d4 [ 35.790330] [ 35.790543] Last potentially related work creation: [ 35.791120] kasan_save_stack+0x22/0x50 [ 35.791620] __kasan_record_aux_stack+0x8e/0xa0 [ 35.792190] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.792833] remove_vma+0x139/0x170 [ 35.793281] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.793832] do_vmi_munmap+0x1f1/0x2b0 [ 35.794323] __vm_munmap+0x138/0x3a0 [ 35.794849] __x64_sys_munmap+0x59/0x80 [ 35.795339] do_syscall_64+0x3f/0x90 [ 35.795814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.796450] [ 35.796662] The buggy address belongs to the object at ffff88800d9ca000 [ 35.796662] which belongs to the cache vm_area_struct of size 168 [ 35.798136] The buggy address is located 88 bytes inside of [ 35.798136] freed 168-byte region [ffff88800d9ca000, ffff88800d9ca0a8) [ 35.799525] [ 35.799741] The buggy address belongs to the physical page: [ 35.800399] page:00000000f4e924b1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9ca [ 35.801475] memcg:ffff8880098a1f01 [ 35.801908] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.802549] page_type: 0xffffffff() [ 35.802999] raw: 0100000000000200 ffff8880087a0c80 ffffea0000377480 dead000000000004 [ 35.803917] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880098a1f01 [ 35.804816] page dumped because: kasan: bad access detected [ 35.805474] [ 35.805689] Memory state around the buggy address: [ 35.806281] ffff88800d9c9f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 35.807130] ffff88800d9c9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.807996] >ffff88800d9ca000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.808835] ^ [ 35.809571] ffff88800d9ca080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 35.810439] ffff88800d9ca100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.811298] ================================================================== [ 35.812232] Disabling lock debugging due to kernel taint [ 38.397440] BUG: Bad rss-counter state mm:00000000c68a26ac type:MM_FILEPAGES val:33 [ 38.398456] BUG: Bad rss-counter state mm:00000000c68a26ac type:MM_ANONPAGES val:22 [ 38.881356] BUG: Bad rss-counter state mm:0000000007f5876d type:MM_FILEPAGES val:33 [ 38.882526] BUG: Bad rss-counter state mm:0000000007f5876d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58500' (ECDSA) to the list of known hosts. 2023/06/21 09:22:51 fuzzer started 2023/06/21 09:22:51 dialing manager at localhost:36067 2023/06/21 09:22:51 checking machine... 2023/06/21 09:22:51 checking revisions... [ 39.634842] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:22:51 testing simple program... [ 39.690124] cgroup: Unknown subsys name 'net' [ 39.747252] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:22:51 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff1100d9c135e RSI=ffffffff8180c705 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a88 R8 =ffffffff86138e90 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800fe3d1c0 R15=ffff88800d76bd90 RIP=ffffffff813ad47f RFL=00000286 [--S--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 00007fc23fbc4900 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=00007fc240179650 CR3=000000000e87e000 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=0000000000000000 RBX=0000000000000001 RCX=ffffffff8613f40e RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880146bf7f8 RSP=ffff8880146bf730 R8 =ffffffff8613f412 R9 =ffff8880146bf7e0 R10=0000000000038001 R11=0000000000021e7d R12=ffff8880146bf800 R13=ffff8880146bf7e8 R14=ffff8880146bf9c8 R15=ffff8880146bf7a0 RIP=ffffffff81131151 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 00007fd913ec0900 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=00007fd9132b0c10 CR3=000000000d67c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=aac23366fb39c87a00000000000ae988 XMM05=2ffc33bb683cc89d0000000000132888 XMM06=4fda316b135da52b0000000000131308 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000