Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 99.068554] BUG: Bad rss-counter state mm:000000007090bb96 type:MM_FILEPAGES val:33 [ 99.069871] BUG: Bad rss-counter state mm:000000007090bb96 type:MM_ANONPAGES val:22 [ 99.220329] ================================================================== [ 99.221274] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 99.222222] Read of size 8 at addr ffff888015ea7b38 by task sshd/220 [ 99.223008] [ 99.223241] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 99.224433] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 99.225415] Call Trace: [ 99.225867] [ 99.226213] dump_stack_lvl+0x91/0xf0 [ 99.226801] print_report+0xcc/0x620 [ 99.227376] ? __virt_addr_valid+0x102/0x340 [ 99.228029] ? vma_interval_tree_remove+0xc75/0xec0 [ 99.228807] ? vma_interval_tree_remove+0xc75/0xec0 [ 99.229564] kasan_report+0xbe/0xf0 [ 99.230136] ? vma_interval_tree_remove+0xc75/0xec0 [ 99.230874] vma_interval_tree_remove+0xc75/0xec0 [ 99.231599] vma_prepare+0xc54/0x11a0 [ 99.232180] __split_vma+0x5af/0x950 [ 99.232769] ? __pfx___split_vma+0x10/0x10 [ 99.233402] ? find_held_lock+0x2c/0x110 [ 99.234024] do_vmi_align_munmap+0x2ba/0x11f0 [ 99.234704] ? lock_is_held_type+0x9f/0x120 [ 99.235352] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 99.236084] ? mtree_range_walk+0x632/0x900 [ 99.236779] ? mas_walk+0x5c7/0x7c0 [ 99.237266] do_vmi_munmap+0x1f1/0x2b0 [ 99.237861] mmap_region+0x1f9/0x2660 [ 99.238348] ? vm_mmap_pgoff+0x15c/0x3a0 [ 99.238857] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 99.239575] ? __pfx_lock_acquire+0x10/0x10 [ 99.240102] ? __pfx_mmap_region+0x10/0x10 [ 99.240654] ? security_mmap_addr+0x7d/0xa0 [ 99.241193] ? get_unmapped_area+0x1f5/0x3f0 [ 99.241742] do_mmap+0x854/0xf00 [ 99.242195] vm_mmap_pgoff+0x1a6/0x3a0 [ 99.242702] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 99.243266] ksys_mmap_pgoff+0x3af/0x500 [ 99.243772] do_syscall_64+0x3f/0x90 [ 99.244256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 99.244921] RIP: 0033:0x7f2837f2dd82 [ 99.245385] 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 [ 99.247511] RSP: 002b:00007ffe59f14648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 99.248457] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2837f2dd82 [ 99.249315] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2837367000 [ 99.250175] RBP: 00007f2837367000 R08: 0000000000000009 R09: 0000000000001000 [ 99.251037] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c4de927b20 [ 99.251885] R13: 00007ffe59f14660 R14: 00007ffe59f14690 R15: 00007ffe59f149f0 [ 99.252761] [ 99.253085] [ 99.253304] Allocated by task 213: [ 99.253727] kasan_save_stack+0x22/0x50 [ 99.254233] kasan_set_track+0x25/0x30 [ 99.254734] __kasan_slab_alloc+0x59/0x70 [ 99.255270] kmem_cache_alloc+0x16b/0x370 [ 99.255797] vm_area_dup+0x20/0x160 [ 99.256267] __split_vma+0x170/0x950 [ 99.256780] split_vma+0xc6/0x110 [ 99.257223] mprotect_fixup+0x8d2/0xb30 [ 99.257739] do_mprotect_pkey+0x87e/0xd40 [ 99.258271] __x64_sys_mprotect+0x78/0xc0 [ 99.258791] do_syscall_64+0x3f/0x90 [ 99.259276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 99.259923] [ 99.260145] Freed by task 213: [ 99.260560] kasan_save_stack+0x22/0x50 [ 99.261069] kasan_set_track+0x25/0x30 [ 99.261566] kasan_save_free_info+0x2b/0x50 [ 99.262100] __kasan_slab_free+0x10a/0x190 [ 99.262642] kmem_cache_free+0x10d/0x4d0 [ 99.263154] rcu_core+0x8c8/0x2860 [ 99.263598] __do_softirq+0x1b7/0x7d4 [ 99.264077] [ 99.264295] Last potentially related work creation: [ 99.264984] kasan_save_stack+0x22/0x50 [ 99.265490] __kasan_record_aux_stack+0x8e/0xa0 [ 99.266063] __call_rcu_common.constprop.0+0x6a/0xb90 [ 99.266712] remove_vma+0x139/0x170 [ 99.267165] do_vmi_align_munmap+0xd4a/0x11f0 [ 99.267731] do_vmi_munmap+0x1f1/0x2b0 [ 99.268229] __vm_munmap+0x138/0x3a0 [ 99.268710] __x64_sys_munmap+0x59/0x80 [ 99.269206] do_syscall_64+0x3f/0x90 [ 99.269687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 99.270335] [ 99.270556] Second to last potentially related work creation: [ 99.271240] kasan_save_stack+0x22/0x50 [ 99.271752] __kasan_record_aux_stack+0x8e/0xa0 [ 99.272332] __call_rcu_common.constprop.0+0x6a/0xb90 [ 99.272995] remove_vma+0x139/0x170 [ 99.273446] do_vmi_align_munmap+0xd4a/0x11f0 [ 99.274004] do_vmi_munmap+0x1f1/0x2b0 [ 99.274499] mmap_region+0x1f9/0x2660 [ 99.274980] do_mmap+0x854/0xf00 [ 99.275414] vm_mmap_pgoff+0x1a6/0x3a0 [ 99.275903] ksys_mmap_pgoff+0x3af/0x500 [ 99.276436] do_syscall_64+0x3f/0x90 [ 99.276912] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 99.277559] [ 99.277778] The buggy address belongs to the object at ffff888015ea7ae0 [ 99.277778] which belongs to the cache vm_area_struct of size 168 [ 99.279239] The buggy address is located 88 bytes inside of [ 99.279239] freed 168-byte region [ffff888015ea7ae0, ffff888015ea7b88) [ 99.280665] [ 99.280883] The buggy address belongs to the physical page: [ 99.281539] page:0000000076a549dc refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888015ea71d0 pfn:0x15ea7 [ 99.282787] memcg:ffff888015eadd01 [ 99.283219] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 99.283926] page_type: 0xffffffff() [ 99.284388] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 99.285335] raw: ffff888015ea71d0 0000000080110007 00000001ffffffff ffff888015eadd01 [ 99.286240] page dumped because: kasan: bad access detected [ 99.286909] [ 99.287128] Memory state around the buggy address: [ 99.287705] ffff888015ea7a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 99.288578] ffff888015ea7a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 99.289438] >ffff888015ea7b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 99.290291] ^ [ 99.290896] ffff888015ea7b80: fb fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb [ 99.291775] ffff888015ea7c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 99.292651] ================================================================== [ 99.293601] Disabling lock debugging due to kernel taint [ 101.362230] BUG: Bad rss-counter state mm:0000000005d20600 type:MM_FILEPAGES val:33 [ 101.363212] BUG: Bad rss-counter state mm:0000000005d20600 type:MM_ANONPAGES val:22 [ 101.769969] BUG: Bad rss-counter state mm:00000000e9e8eb89 type:MM_FILEPAGES val:33 [ 101.771324] BUG: Bad rss-counter state mm:00000000e9e8eb89 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60876' (ECDSA) to the list of known hosts. 2023/06/20 07:00:56 fuzzer started 2023/06/20 07:00:56 dialing manager at localhost:44161 2023/06/20 07:00:56 checking machine... 2023/06/20 07:00:56 checking revisions... [ 102.529884] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:00:57 testing simple program... [ 102.583593] cgroup: Unknown subsys name 'net' [ 102.636010] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:59:47 Registers: info registers vcpu 0 RAX=0000000000000078 RBX=00005653b2ad0f80 RCX=000000000000001c RDX=000000000000001c RSI=00005653b2adfb5c RDI=00005653b2ab3b20 RBP=00007ffd4a448780 RSP=00007ffd4a448718 R8 =00005653b2adfb5c R9 =00007fa9c7c72be0 R10=0000000000200000 R11=0000000000000246 R12=000000000000001c R13=00005653b2adfb77 R14=000000000000001c R15=0000000000000000 RIP=00007fa9c7c16a50 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa9c76c0900 00000000 00000000 GS =0000 0000000000000000 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=00007fa9c7c75650 CR3=000000001a30a000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000ffff00 XMM03=207265766574616877206f642079616d XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00ffffffffffffffffffffffffffffff XMM08=6220292e2e2e202c72656e6e61000023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8617de5e RDX=0000000000000001 RSI=0000000000000000 RDI=ffffffff8617de60 RBP=ffff888012d5f688 RSP=ffff888012d5f5c0 R8 =0000000000000001 R9 =ffff888012d5f670 R10=0000000000038001 R11=000000000002c9c3 R12=ffff888012d5f690 R13=ffff888012d5f678 R14=ffff888012d5fac8 R15=ffff888012d5f630 RIP=ffffffff81131202 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 00007f57a89b3700 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=00007f3c14c220f0 CR3=0000000019e68000 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=2036353a30303a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a30303a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000