syzkaller login: [ 48.891140] BUG: Bad rss-counter state mm:00000000bc10012f type:MM_FILEPAGES val:33 [ 48.892141] BUG: Bad rss-counter state mm:00000000bc10012f type:MM_ANONPAGES val:22 [ 49.053729] ================================================================== [ 49.054324] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.054921] Read of size 8 at addr ffff88801a17b968 by task sshd/221 [ 49.059428] [ 49.059573] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.060120] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.060735] Call Trace: [ 49.060939] [ 49.061117] dump_stack_lvl+0x91/0xf0 [ 49.061420] print_report+0xcc/0x620 [ 49.061735] ? __virt_addr_valid+0x102/0x340 [ 49.062085] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.062475] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.062867] kasan_report+0xbe/0xf0 [ 49.063194] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.063597] vma_interval_tree_remove+0xc75/0xec0 [ 49.063994] vma_prepare+0xc54/0x11a0 [ 49.064312] __split_vma+0x5af/0x950 [ 49.064622] ? __pfx___split_vma+0x10/0x10 [ 49.064969] ? find_held_lock+0x2c/0x110 [ 49.065316] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.065687] ? lock_is_held_type+0x9f/0x120 [ 49.068050] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.068447] ? mtree_range_walk+0x632/0x900 [ 49.068808] ? mas_walk+0x5c7/0x7c0 [ 49.069118] do_vmi_munmap+0x1f1/0x2b0 [ 49.069439] mmap_region+0x1f9/0x2660 [ 49.075102] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.075445] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.075909] ? __pfx_lock_acquire+0x10/0x10 [ 49.076259] ? __pfx_mmap_region+0x10/0x10 [ 49.076606] ? security_mmap_addr+0x7d/0xa0 [ 49.076960] ? get_unmapped_area+0x1f5/0x3f0 [ 49.077320] do_mmap+0x854/0xf00 [ 49.077612] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.077940] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.078306] ksys_mmap_pgoff+0x3af/0x500 [ 49.078639] do_syscall_64+0x3f/0x90 [ 49.078955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.079397] RIP: 0033:0x7f7e3e68ad82 [ 49.079698] 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 [ 49.081060] RSP: 002b:00007ffcab95b0c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.081645] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7e3e68ad82 [ 49.082190] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7e3dac4000 [ 49.082735] RBP: 00007f7e3dac4000 R08: 0000000000000009 R09: 0000000000001000 [ 49.083311] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561a515ddb20 [ 49.083855] R13: 00007ffcab95b0e0 R14: 00007ffcab95b110 R15: 00007ffcab95b470 [ 49.084410] [ 49.084603] [ 49.084742] Allocated by task 214: [ 49.085022] kasan_save_stack+0x22/0x50 [ 49.085352] kasan_set_track+0x25/0x30 [ 49.085667] __kasan_slab_alloc+0x59/0x70 [ 49.086009] kmem_cache_alloc+0x16b/0x370 [ 49.086338] vm_area_dup+0x20/0x160 [ 49.086634] __split_vma+0x170/0x950 [ 49.086941] split_vma+0xc6/0x110 [ 49.089069] mprotect_fixup+0x8d2/0xb30 [ 49.089450] do_mprotect_pkey+0x87e/0xd40 [ 49.089788] __x64_sys_mprotect+0x78/0xc0 [ 49.090132] do_syscall_64+0x3f/0x90 [ 49.090487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.090902] [ 49.091057] Freed by task 13: [ 49.091413] kasan_save_stack+0x22/0x50 [ 49.091741] kasan_set_track+0x25/0x30 [ 49.092065] kasan_save_free_info+0x2b/0x50 [ 49.092551] __kasan_slab_free+0x10a/0x190 [ 49.103319] kmem_cache_free+0x10d/0x4d0 [ 49.103636] rcu_core+0x8c8/0x2860 [ 49.103920] __do_softirq+0x1b7/0x7d4 [ 49.104231] [ 49.104370] Last potentially related work creation: [ 49.104738] kasan_save_stack+0x22/0x50 [ 49.105068] __kasan_record_aux_stack+0x8e/0xa0 [ 49.105436] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.105853] remove_vma+0x139/0x170 [ 49.106147] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.106504] do_vmi_munmap+0x1f1/0x2b0 [ 49.106815] __vm_munmap+0x138/0x3a0 [ 49.107151] __x64_sys_munmap+0x59/0x80 [ 49.107467] do_syscall_64+0x3f/0x90 [ 49.107766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.108178] [ 49.108319] The buggy address belongs to the object at ffff88801a17b910 [ 49.108319] which belongs to the cache vm_area_struct of size 168 [ 49.109241] The buggy address is located 88 bytes inside of [ 49.109241] freed 168-byte region [ffff88801a17b910, ffff88801a17b9b8) [ 49.110107] [ 49.110247] The buggy address belongs to the physical page: [ 49.110664] page:00000000759230ae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a17b [ 49.111394] memcg:ffff88801b887901 [ 49.111674] flags: 0x100000000000200(slab|node=0|zone=1) [ 49.112095] page_type: 0xffffffff() [ 49.112392] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 49.112985] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b887901 [ 49.113570] page dumped because: kasan: bad access detected [ 49.113998] [ 49.114141] Memory state around the buggy address: [ 49.114519] ffff88801a17b800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 49.115095] ffff88801a17b880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 49.115642] >ffff88801a17b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.116176] ^ [ 49.116675] ffff88801a17b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 49.117220] ffff88801a17ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.117758] ================================================================== [ 49.118569] Disabling lock debugging due to kernel taint [ 53.720070] BUG: Bad rss-counter state mm:00000000c2e0616a type:MM_FILEPAGES val:33 [ 53.720727] BUG: Bad rss-counter state mm:00000000c2e0616a type:MM_ANONPAGES val:22 [ 55.611199] BUG: Bad rss-counter state mm:00000000a1149414 type:MM_FILEPAGES val:33 [ 55.611857] BUG: Bad rss-counter state mm:00000000a1149414 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2617' (ECDSA) to the list of known hosts. 2023/06/20 08:23:09 fuzzer started 2023/06/20 08:23:09 dialing manager at localhost:44161 2023/06/20 08:23:09 checking machine... 2023/06/20 08:23:09 checking revisions... [ 56.524417] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:23:10 testing simple program... [ 56.581524] cgroup: Unknown subsys name 'net' [ 56.668732] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:22:56 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f92fede0328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff813f92cd RDX=fffffbfff0f6d651 RSI=0000000000000008 RDI=ffffffff87b6b280 RBP=ffff888008e27dc8 RSP=ffff88806cf09fa8 R8 =0000000000000000 R9 =fffffbfff0f6d650 R10=ffffffff87b6b287 R11=ffff88806cf09ff8 R12=0000000000000001 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff813f92d5 RFL=00000046 [---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=0000556614e1f4d0 CR3=0000000018c2a000 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=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