syzkaller login: [ 34.233597] BUG: Bad rss-counter state mm:00000000750922fb type:MM_FILEPAGES val:33 [ 34.234944] BUG: Bad rss-counter state mm:00000000750922fb type:MM_ANONPAGES val:22 [ 34.375000] ================================================================== [ 34.376202] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.377262] Read of size 8 at addr ffff888015f60c20 by task sshd/220 [ 34.378290] [ 34.378525] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.379437] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.380515] Call Trace: [ 34.380849] [ 34.381155] dump_stack_lvl+0x91/0xf0 [ 34.381669] print_report+0xcc/0x620 [ 34.382177] ? __virt_addr_valid+0x102/0x340 [ 34.382760] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.383411] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.384070] kasan_report+0xbe/0xf0 [ 34.384568] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.385220] vma_interval_tree_remove+0xc75/0xec0 [ 34.385855] vma_prepare+0xc54/0x11a0 [ 34.386359] __split_vma+0x5af/0x950 [ 34.386859] ? __pfx___split_vma+0x10/0x10 [ 34.387412] ? find_held_lock+0x2c/0x110 [ 34.387980] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.388580] ? lock_is_held_type+0x9f/0x120 [ 34.389141] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.389862] ? mtree_range_walk+0x632/0x900 [ 34.390441] ? mas_walk+0x5c7/0x7c0 [ 34.390931] do_vmi_munmap+0x1f1/0x2b0 [ 34.391448] mmap_region+0x1f9/0x2660 [ 34.391983] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.392516] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.393263] ? __pfx_lock_acquire+0x10/0x10 [ 34.393822] ? __pfx_mmap_region+0x10/0x10 [ 34.394379] ? security_mmap_addr+0x7d/0xa0 [ 34.394936] ? get_unmapped_area+0x1f5/0x3f0 [ 34.395510] do_mmap+0x854/0xf00 [ 34.395993] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.396521] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.397105] ksys_mmap_pgoff+0x3af/0x500 [ 34.397636] do_syscall_64+0x3f/0x90 [ 34.398130] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.398818] RIP: 0033:0x7f8b536a2d82 [ 34.399298] 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 [ 34.401537] RSP: 002b:00007ffea0cf1978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.402499] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8b536a2d82 [ 34.403358] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8b52adc000 [ 34.404225] RBP: 00007f8b52adc000 R08: 0000000000000009 R09: 0000000000001000 [ 34.405112] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bdbb52cec0 [ 34.405983] R13: 00007ffea0cf1990 R14: 00007ffea0cf19c0 R15: 00007ffea0cf1d20 [ 34.406857] [ 34.407147] [ 34.407374] Allocated by task 213: [ 34.407834] kasan_save_stack+0x22/0x50 [ 34.408342] kasan_set_track+0x25/0x30 [ 34.408843] __kasan_slab_alloc+0x59/0x70 [ 34.409369] kmem_cache_alloc+0x16b/0x370 [ 34.409889] vm_area_dup+0x20/0x160 [ 34.410343] __split_vma+0x170/0x950 [ 34.410809] split_vma+0xc6/0x110 [ 34.411254] mprotect_fixup+0x8d2/0xb30 [ 34.411768] do_mprotect_pkey+0x87e/0xd40 [ 34.412288] __x64_sys_mprotect+0x78/0xc0 [ 34.412810] do_syscall_64+0x3f/0x90 [ 34.413284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.413937] [ 34.414157] Freed by task 210: [ 34.414549] kasan_save_stack+0x22/0x50 [ 34.415045] kasan_set_track+0x25/0x30 [ 34.415555] kasan_save_free_info+0x2b/0x50 [ 34.416091] __kasan_slab_free+0x10a/0x190 [ 34.416630] kmem_cache_free+0x10d/0x4d0 [ 34.417144] rcu_core+0x8c8/0x2860 [ 34.417591] __do_softirq+0x1b7/0x7d4 [ 34.418068] [ 34.418282] Last potentially related work creation: [ 34.418967] kasan_save_stack+0x22/0x50 [ 34.419483] __kasan_record_aux_stack+0x8e/0xa0 [ 34.420071] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.420716] remove_vma+0x139/0x170 [ 34.421169] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.421738] do_vmi_munmap+0x1f1/0x2b0 [ 34.422224] __vm_munmap+0x138/0x3a0 [ 34.422688] __x64_sys_munmap+0x59/0x80 [ 34.423183] do_syscall_64+0x3f/0x90 [ 34.423673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.424316] [ 34.424533] Second to last potentially related work creation: [ 34.425226] kasan_save_stack+0x22/0x50 [ 34.425732] __kasan_record_aux_stack+0x8e/0xa0 [ 34.426308] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.426958] remove_vma+0x139/0x170 [ 34.427406] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.428003] do_vmi_munmap+0x1f1/0x2b0 [ 34.428492] mmap_region+0x1f9/0x2660 [ 34.428966] do_mmap+0x854/0xf00 [ 34.429396] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.429880] ksys_mmap_pgoff+0x3af/0x500 [ 34.430379] do_syscall_64+0x3f/0x90 [ 34.430853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.431493] [ 34.431719] The buggy address belongs to the object at ffff888015f60bc8 [ 34.431719] which belongs to the cache vm_area_struct of size 168 [ 34.433188] The buggy address is located 88 bytes inside of [ 34.433188] freed 168-byte region [ffff888015f60bc8, ffff888015f60c70) [ 34.434583] [ 34.434798] The buggy address belongs to the physical page: [ 34.435476] page:000000007e613db7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15f60 [ 34.436589] memcg:ffff88801a053e01 [ 34.437018] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.437721] page_type: 0xffffffff() [ 34.438176] raw: 0100000000000200 ffff88800879fc80 0000000000000000 0000000000000001 [ 34.439096] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a053e01 [ 34.440013] page dumped because: kasan: bad access detected [ 34.440678] [ 34.440894] Memory state around the buggy address: [ 34.441481] ffff888015f60b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.442339] ffff888015f60b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.443197] >ffff888015f60c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.444071] ^ [ 34.444622] ffff888015f60c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 34.445508] ffff888015f60d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 34.446392] ================================================================== [ 34.447390] Disabling lock debugging due to kernel taint [ 36.491914] BUG: Bad rss-counter state mm:000000007f0ec84c type:MM_FILEPAGES val:33 [ 36.492973] BUG: Bad rss-counter state mm:000000007f0ec84c type:MM_ANONPAGES val:22 [ 36.965573] BUG: Bad rss-counter state mm:000000000124f64b type:MM_FILEPAGES val:33 [ 36.966616] BUG: Bad rss-counter state mm:000000000124f64b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4426' (ECDSA) to the list of known hosts. 2023/06/19 15:17:32 fuzzer started 2023/06/19 15:17:33 dialing manager at localhost:44161 2023/06/19 15:17:33 checking machine... 2023/06/19 15:17:33 checking revisions... [ 37.674338] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:17:33 testing simple program... [ 37.724906] cgroup: Unknown subsys name 'net' [ 37.764304] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:17:28 Registers: info registers vcpu 0 RAX=1ffffffff0bbf952 RBX=ffffffff85dfca94 RCX=ffffffff8180c8d9 RDX=0000000000000000 RSI=ffffffff861375e0 RDI=ffffffff85dfca8c RBP=ffffffff85dfca8c RSP=ffff88806ce099e0 R8 =ffffffff861375e0 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020dae R12=ffffffff85dfcaa0 R13=ffffffff85dfca8c R14=ffffffff85dfca8c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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=00007f9d4cca6f00 CR3=000000000eaaa000 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=2847cf17adf696b36240cd2f298efd1d XMM02=ec2efd57dc4c00df0000000000120300 XMM03=6d46ebdc123dec1b00000000001203d0 XMM04=ef6c2fe78538a67a00000000000ae988 XMM05=19e9129bd510f2350000000000135918 XMM06=a83e4dfea02035100000000000134780 XMM07=e042d86d42eb936e00000000001249e8 XMM08=6d46ebdc123dec1b00000000001203d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff844bfa24 RCX=0000000000000001 RDX=1ffff11003464e15 RSI=ffff88801a3274b8 RDI=ffffffff844bfa24 RBP=ffffffff844bfa24 RSP=ffff88801a327000 R8 =0000000000000001 R9 =ffff88801a327090 R10=0000000000038001 R11=00000000000b3b3c R12=0000000000000001 R13=0000000000000000 R14=ffff8880166ad1c0 R15=0000000000000000 RIP=ffffffff811fc772 RFL=00000287 [--S--PC] 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 00007fd0f50b0900 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=00007fd0f508f020 CR3=0000000018814000 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=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