syzkaller login: [ 30.750344] BUG: Bad rss-counter state mm:000000003644f934 type:MM_FILEPAGES val:33 [ 30.751378] BUG: Bad rss-counter state mm:000000003644f934 type:MM_ANONPAGES val:22 [ 30.916720] ================================================================== [ 30.917605] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.918487] Read of size 8 at addr ffff88801b446228 by task sshd/221 [ 30.919204] [ 30.919411] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.920392] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.921323] Call Trace: [ 30.921629] [ 30.921905] dump_stack_lvl+0x91/0xf0 [ 30.922386] print_report+0xcc/0x620 [ 30.922840] ? __virt_addr_valid+0x102/0x340 [ 30.923355] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.923944] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.924530] kasan_report+0xbe/0xf0 [ 30.924984] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.925586] vma_interval_tree_remove+0xc75/0xec0 [ 30.926160] vma_prepare+0xc54/0x11a0 [ 30.926630] __split_vma+0x5af/0x950 [ 30.927089] ? __pfx___split_vma+0x10/0x10 [ 30.927609] ? find_held_lock+0x2c/0x110 [ 30.928117] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.928663] ? lock_is_held_type+0x9f/0x120 [ 30.929195] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.929804] ? mtree_range_walk+0x632/0x900 [ 30.930338] ? mas_walk+0x5c7/0x7c0 [ 30.930807] do_vmi_munmap+0x1f1/0x2b0 [ 30.931288] mmap_region+0x1f9/0x2660 [ 30.931765] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.932270] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.932967] ? __pfx_lock_acquire+0x10/0x10 [ 30.933522] ? __pfx_mmap_region+0x10/0x10 [ 30.934045] ? security_mmap_addr+0x7d/0xa0 [ 30.934562] ? get_unmapped_area+0x1f5/0x3f0 [ 30.935098] do_mmap+0x854/0xf00 [ 30.935528] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.936006] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.936564] ksys_mmap_pgoff+0x3af/0x500 [ 30.937059] do_syscall_64+0x3f/0x90 [ 30.937534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.938164] RIP: 0033:0x7f05eb158d82 [ 30.938603] 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 [ 30.940695] RSP: 002b:00007fff7ef1a238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.941621] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f05eb158d82 [ 30.942459] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f05ea592000 [ 30.943301] RBP: 00007f05ea592000 R08: 0000000000000009 R09: 0000000000001000 [ 30.944143] R10: 0000000000000812 R11: 0000000000000206 R12: 000056122fcf7ec0 [ 30.944980] R13: 00007fff7ef1a250 R14: 00007fff7ef1a280 R15: 00007fff7ef1a5e0 [ 30.945831] [ 30.946118] [ 30.946329] Allocated by task 214: [ 30.946744] kasan_save_stack+0x22/0x50 [ 30.947242] kasan_set_track+0x25/0x30 [ 30.947718] __kasan_slab_alloc+0x59/0x70 [ 30.948223] kmem_cache_alloc+0x16b/0x370 [ 30.948735] vm_area_dup+0x20/0x160 [ 30.949175] __split_vma+0x170/0x950 [ 30.949643] split_vma+0xc6/0x110 [ 30.950069] mprotect_fixup+0x8d2/0xb30 [ 30.950554] do_mprotect_pkey+0x87e/0xd40 [ 30.951068] __x64_sys_mprotect+0x78/0xc0 [ 30.951572] do_syscall_64+0x3f/0x90 [ 30.952042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.952676] [ 30.952887] Freed by task 214: [ 30.953287] kasan_save_stack+0x22/0x50 [ 30.953783] kasan_set_track+0x25/0x30 [ 30.954267] kasan_save_free_info+0x2b/0x50 [ 30.954786] __kasan_slab_free+0x10a/0x190 [ 30.955314] kmem_cache_free+0x10d/0x4d0 [ 30.955808] rcu_core+0x8c8/0x2860 [ 30.956249] __do_softirq+0x1b7/0x7d4 [ 30.956720] [ 30.956937] Last potentially related work creation: [ 30.957524] kasan_save_stack+0x22/0x50 [ 30.958021] __kasan_record_aux_stack+0x8e/0xa0 [ 30.958587] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.959220] remove_vma+0x139/0x170 [ 30.959670] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.960222] do_vmi_munmap+0x1f1/0x2b0 [ 30.960687] __vm_munmap+0x138/0x3a0 [ 30.961189] __x64_sys_munmap+0x59/0x80 [ 30.961680] do_syscall_64+0x3f/0x90 [ 30.962131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.962733] [ 30.962939] The buggy address belongs to the object at ffff88801b4461d0 [ 30.962939] which belongs to the cache vm_area_struct of size 168 [ 30.964315] The buggy address is located 88 bytes inside of [ 30.964315] freed 168-byte region [ffff88801b4461d0, ffff88801b446278) [ 30.965638] [ 30.965847] The buggy address belongs to the physical page: [ 30.966463] page:00000000f3600c7e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b446 [ 30.967487] memcg:ffff88800f614501 [ 30.967894] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.968571] page_type: 0xffffffff() [ 30.969082] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.970099] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f614501 [ 30.971108] page dumped because: kasan: bad access detected [ 30.971858] [ 30.972098] Memory state around the buggy address: [ 30.972744] ffff88801b446100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.973726] ffff88801b446180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.974698] >ffff88801b446200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.975645] ^ [ 30.976277] ffff88801b446280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.977242] ffff88801b446300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.978090] ================================================================== [ 30.979012] Disabling lock debugging due to kernel taint [ 33.766046] BUG: Bad rss-counter state mm:00000000a0228ccf type:MM_FILEPAGES val:33 [ 33.767154] BUG: Bad rss-counter state mm:00000000a0228ccf type:MM_ANONPAGES val:22 [ 34.303401] BUG: Bad rss-counter state mm:00000000766ba553 type:MM_FILEPAGES val:33 [ 34.304689] BUG: Bad rss-counter state mm:00000000766ba553 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50680' (ECDSA) to the list of known hosts. 2023/06/19 14:37:37 fuzzer started 2023/06/19 14:37:37 dialing manager at localhost:44161 2023/06/19 14:37:37 checking machine... 2023/06/19 14:37:37 checking revisions... [ 35.032682] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:37:38 testing simple program... [ 35.081952] cgroup: Unknown subsys name 'net' [ 35.125696] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:37:37 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff8180c522 RCX=ffffffff860d6801 RDX=1ffff110011aff31 RSI=0000000000000000 RDI=ffffffff8180c522 RBP=ffff888008d7f988 RSP=ffff888008d7f900 R8 =ffffffff860d68fa R9 =ffff888008d7f970 R10=0000000000038001 R11=0000000000010b7e R12=ffff888008d7f9f8 R13=0000000000000000 R14=ffff888008d70000 R15=ffff888016ff5c00 RIP=ffffffff811fc7bf 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 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=00007f62c6e58650 CR3=000000000daaa000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=ff00ffff000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=6579090942414e455f474f4c4c494146 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffff0000ffffffffffffffffffffffff XMM08=00000000202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800d888001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800d887f01 RSI=ffff88800d887f38 RDI=ffff88800d8876a8 RBP=ffff88800d8876f0 RSP=ffff88800d887610 R8 =ffffffff8613fda4 R9 =ffff88800d8876d8 R10=0000000000038001 R11=000000000002244e R12=ffff88800d8876f8 R13=ffff88800d880000 R14=ffff88800d887f40 R15=ffff88800d887698 RIP=ffffffff811304d1 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 00007fbf09f51900 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=00007fbf09471028 CR3=0000000013658000 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=b57d370b25d140b800000000000ae988 XMM05=bf21d66fbc7bd06d0000000000134ce0 XMM06=e4cb8bb95a7664b60000000000133b98 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000