[ 31.377663] BUG: Bad rss-counter state mm:00000000bdccf1b6 type:MM_FILEPAGES val:33 [ 31.378794] BUG: Bad rss-counter state mm:00000000bdccf1b6 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.546787] ================================================================== [ 31.547832] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.548825] Read of size 8 at addr ffff88800e273ed8 by task sshd/218 [ 31.549804] [ 31.550037] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.550949] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.552002] Call Trace: [ 31.552344] [ 31.552643] dump_stack_lvl+0x91/0xf0 [ 31.553158] print_report+0xcc/0x620 [ 31.553665] ? __virt_addr_valid+0x102/0x340 [ 31.554246] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.554895] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.555570] kasan_report+0xbe/0xf0 [ 31.556082] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.556746] vma_interval_tree_remove+0xc75/0xec0 [ 31.557390] vma_prepare+0xc54/0x11a0 [ 31.557903] __split_vma+0x5af/0x950 [ 31.558412] ? __pfx___split_vma+0x10/0x10 [ 31.558981] ? find_held_lock+0x2c/0x110 [ 31.559549] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.560153] ? lock_is_held_type+0x9f/0x120 [ 31.560731] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.561383] ? mtree_range_walk+0x632/0x900 [ 31.561978] ? mas_walk+0x5c7/0x7c0 [ 31.562490] do_vmi_munmap+0x1f1/0x2b0 [ 31.563011] mmap_region+0x1f9/0x2660 [ 31.563532] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.564094] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.564846] ? __pfx_lock_acquire+0x10/0x10 [ 31.565409] ? __pfx_mmap_region+0x10/0x10 [ 31.565977] ? security_mmap_addr+0x7d/0xa0 [ 31.566542] ? get_unmapped_area+0x1f5/0x3f0 [ 31.567142] do_mmap+0x854/0xf00 [ 31.567616] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.568144] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.568743] ksys_mmap_pgoff+0x3af/0x500 [ 31.569286] do_syscall_64+0x3f/0x90 [ 31.569799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.570489] RIP: 0033:0x7f608eedfd82 [ 31.570981] 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 [ 31.573271] RSP: 002b:00007ffe0874b568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.574238] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f608eedfd82 [ 31.575187] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f608e319000 [ 31.576112] RBP: 00007f608e319000 R08: 0000000000000009 R09: 0000000000001000 [ 31.577035] R10: 0000000000000812 R11: 0000000000000206 R12: 00005653a21a0ec0 [ 31.577967] R13: 00007ffe0874b580 R14: 00007ffe0874b5b0 R15: 00007ffe0874b910 [ 31.578928] [ 31.579272] [ 31.579508] Allocated by task 211: [ 31.579965] kasan_save_stack+0x22/0x50 [ 31.580511] kasan_set_track+0x25/0x30 [ 31.581035] __kasan_slab_alloc+0x59/0x70 [ 31.581593] kmem_cache_alloc+0x16b/0x370 [ 31.582148] vm_area_dup+0x20/0x160 [ 31.582639] __split_vma+0x170/0x950 [ 31.583137] split_vma+0xc6/0x110 [ 31.583609] mprotect_fixup+0x8d2/0xb30 [ 31.584150] do_mprotect_pkey+0x87e/0xd40 [ 31.584698] __x64_sys_mprotect+0x78/0xc0 [ 31.585262] do_syscall_64+0x3f/0x90 [ 31.585783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.586503] [ 31.586737] Freed by task 211: [ 31.587186] kasan_save_stack+0x22/0x50 [ 31.587741] kasan_set_track+0x25/0x30 [ 31.588286] kasan_save_free_info+0x2b/0x50 [ 31.588873] __kasan_slab_free+0x10a/0x190 [ 31.589452] kmem_cache_free+0x10d/0x4d0 [ 31.590081] rcu_core+0x8c8/0x2860 [ 31.590569] __do_softirq+0x1b7/0x7d4 [ 31.591109] [ 31.591343] Last potentially related work creation: [ 31.591989] kasan_save_stack+0x22/0x50 [ 31.592538] __kasan_record_aux_stack+0x8e/0xa0 [ 31.593152] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.593842] remove_vma+0x139/0x170 [ 31.594328] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.594930] do_vmi_munmap+0x1f1/0x2b0 [ 31.595466] __vm_munmap+0x138/0x3a0 [ 31.595991] __x64_sys_munmap+0x59/0x80 [ 31.596541] do_syscall_64+0x3f/0x90 [ 31.597065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.597778] [ 31.598013] Second to last potentially related work creation: [ 31.598766] kasan_save_stack+0x22/0x50 [ 31.599339] __kasan_record_aux_stack+0x8e/0xa0 [ 31.599970] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.600662] remove_vma+0x139/0x170 [ 31.601147] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.601779] do_vmi_munmap+0x1f1/0x2b0 [ 31.602316] __vm_munmap+0x138/0x3a0 [ 31.602832] elf_map+0x26f/0x310 [ 31.603327] load_elf_binary+0x3417/0x5030 [ 31.603919] bprm_execve+0x803/0x1940 [ 31.604445] do_execveat_common+0x734/0x8e0 [ 31.605032] __x64_sys_execve+0x93/0xc0 [ 31.605573] do_syscall_64+0x3f/0x90 [ 31.606099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.606817] [ 31.607047] The buggy address belongs to the object at ffff88800e273e80 [ 31.607047] which belongs to the cache vm_area_struct of size 168 [ 31.608706] The buggy address is located 88 bytes inside of [ 31.608706] freed 168-byte region [ffff88800e273e80, ffff88800e273f28) [ 31.610228] [ 31.610472] The buggy address belongs to the physical page: [ 31.611194] page:00000000943c5120 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe273 [ 31.612396] memcg:ffff88800e01cb01 [ 31.612852] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.613570] page_type: 0xffffffff() [ 31.614077] raw: 0100000000000200 ffff8880087a0c80 ffffea0000377940 dead000000000002 [ 31.615104] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e01cb01 [ 31.616107] page dumped because: kasan: bad access detected [ 31.616839] [ 31.617081] Memory state around the buggy address: [ 31.617719] ffff88800e273d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.618666] ffff88800e273e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.619615] >ffff88800e273e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.620555] ^ [ 31.621357] ffff88800e273f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.622300] ffff88800e273f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.623237] ================================================================== [ 31.624377] Disabling lock debugging due to kernel taint [ 33.481235] BUG: Bad rss-counter state mm:0000000087a3112b type:MM_FILEPAGES val:33 [ 33.482114] BUG: Bad rss-counter state mm:0000000087a3112b type:MM_ANONPAGES val:22 [ 34.035159] BUG: Bad rss-counter state mm:00000000f686b951 type:MM_FILEPAGES val:33 [ 34.036325] BUG: Bad rss-counter state mm:00000000f686b951 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51666' (ECDSA) to the list of known hosts. 2023/06/20 22:37:11 fuzzer started 2023/06/20 22:37:12 dialing manager at localhost:36067 2023/06/20 22:37:12 checking machine... 2023/06/20 22:37:12 checking revisions... [ 34.669835] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:37:12 testing simple program... [ 34.739624] cgroup: Unknown subsys name 'net' [ 34.788884] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:37:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016ee51c0 RCX=0000000000000000 RDX=ffff888016ee51c0 RSI=ffffffff818e96a6 RDI=0000000000000000 RBP=1ffff110032f2fba RSP=ffff888019797d58 R8 =0000000000000007 R9 =fffffffffffff000 R10=ffff88800c496600 R11=0000000000000000 R12=ffff888019797ea8 R13=ffff88800c496600 R14=0000000000000000 R15=0000000000000400 RIP=ffffffff818e96a6 RFL=00000293 [--S-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 00007f291fce6900 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=00007fff8dc35000 CR3=000000000ec7a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f43355b4e80 CR3=000000000e15c000 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=bd20881b2f51b3b86c4e2a85af1e315a XMM02=000000000011b370ec2efd57dc4c00df XMM03=0000000000122118a62587c39eab29bc XMM04=77c1499a57baf18a00000000000ae988 XMM05=751b9502027dc0b900000000001333e0 XMM06=b538f20d2cef485a00000000001325b8 XMM07=e042d86d42eb936e00000000001223f0 XMM08=a62587c39eab29bc000000000011b3d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000