[ 58.219128] BUG: Bad rss-counter state mm:00000000bece74ae type:MM_FILEPAGES val:33 [ 58.220318] BUG: Bad rss-counter state mm:00000000bece74ae type:MM_ANONPAGES val:22 [ 58.258557] ================================================================== [ 58.259582] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 58.260650] Read of size 8 at addr ffff88800df296b0 by task sshd/219 [ 58.261424] [ 58.261641] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 58.262908] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 58.264240] Call Trace: [ 58.264675] [ 58.265056] dump_stack_lvl+0x91/0xf0 [ 58.265704] print_report+0xcc/0x620 [ 58.266348] ? __virt_addr_valid+0x102/0x340 [ 58.267102] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.267910] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.268706] kasan_report+0xbe/0xf0 [ 58.269313] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.270135] vma_interval_tree_remove+0xc75/0xec0 [ 58.270923] vma_prepare+0xc54/0x11a0 [ 58.271463] __split_vma+0x5af/0x950 [ 58.271852] ? __pfx___split_vma+0x10/0x10 [ 58.272286] ? find_held_lock+0x2c/0x110 [ 58.272707] do_vmi_align_munmap+0x2ba/0x11f0 [ 58.273168] ? lock_is_held_type+0x9f/0x120 [ 58.273616] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 58.274116] ? mtree_range_walk+0x632/0x900 [ 58.274569] ? mas_walk+0x5c7/0x7c0 [ 58.274957] do_vmi_munmap+0x1f1/0x2b0 [ 58.275368] mmap_region+0x1f9/0x2660 [ 58.275753] ? vm_mmap_pgoff+0x15c/0x3a0 [ 58.276168] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 58.276750] ? __pfx_lock_acquire+0x10/0x10 [ 58.277181] ? __pfx_mmap_region+0x10/0x10 [ 58.277615] ? security_mmap_addr+0x7d/0xa0 [ 58.278045] ? get_unmapped_area+0x1f5/0x3f0 [ 58.278494] do_mmap+0x854/0xf00 [ 58.278849] vm_mmap_pgoff+0x1a6/0x3a0 [ 58.279261] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 58.279721] ksys_mmap_pgoff+0x3af/0x500 [ 58.280135] do_syscall_64+0x3f/0x90 [ 58.280525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.281055] RIP: 0033:0x7fde0bdded82 [ 58.281427] 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 [ 58.283186] RSP: 002b:00007fffce29a758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 58.283926] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fde0bdded82 [ 58.284611] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fde0b218000 [ 58.285291] RBP: 00007fde0b218000 R08: 0000000000000009 R09: 0000000000001000 [ 58.285982] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d0b773ec0 [ 58.286670] R13: 00007fffce29a770 R14: 00007fffce29a7a0 R15: 00007fffce29ab00 [ 58.287381] [ 58.287617] [ 58.287797] Allocated by task 212: [ 58.288145] kasan_save_stack+0x22/0x50 [ 58.288559] kasan_set_track+0x25/0x30 [ 58.288959] __kasan_slab_alloc+0x59/0x70 [ 58.289384] kmem_cache_alloc+0x16b/0x370 [ 58.289798] vm_area_dup+0x20/0x160 [ 58.290161] __split_vma+0x170/0x950 [ 58.290537] split_vma+0xc6/0x110 [ 58.290893] mprotect_fixup+0x8d2/0xb30 [ 58.291315] do_mprotect_pkey+0x87e/0xd40 [ 58.291742] __x64_sys_mprotect+0x78/0xc0 [ 58.292168] do_syscall_64+0x3f/0x90 [ 58.292559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.293083] [ 58.293258] Freed by task 212: [ 58.293578] kasan_save_stack+0x22/0x50 [ 58.293992] kasan_set_track+0x25/0x30 [ 58.294390] kasan_save_free_info+0x2b/0x50 [ 58.294818] __kasan_slab_free+0x10a/0x190 [ 58.295256] kmem_cache_free+0x10d/0x4d0 [ 58.295662] rcu_core+0x8c8/0x2860 [ 58.296019] __do_softirq+0x1b7/0x7d4 [ 58.296403] [ 58.296581] Last potentially related work creation: [ 58.297064] kasan_save_stack+0x22/0x50 [ 58.297473] __kasan_record_aux_stack+0x8e/0xa0 [ 58.297944] __call_rcu_common.constprop.0+0x6a/0xb90 [ 58.298463] remove_vma+0x139/0x170 [ 58.298833] do_vmi_align_munmap+0xd4a/0x11f0 [ 58.299306] do_vmi_munmap+0x1f1/0x2b0 [ 58.299698] __vm_munmap+0x138/0x3a0 [ 58.300079] __x64_sys_munmap+0x59/0x80 [ 58.300480] do_syscall_64+0x3f/0x90 [ 58.300865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.301385] [ 58.301558] Second to last potentially related work creation: [ 58.302113] kasan_save_stack+0x22/0x50 [ 58.302526] __kasan_record_aux_stack+0x8e/0xa0 [ 58.302992] __call_rcu_common.constprop.0+0x6a/0xb90 [ 58.303517] remove_vma+0x139/0x170 [ 58.303879] do_vmi_align_munmap+0xd4a/0x11f0 [ 58.304327] do_vmi_munmap+0x1f1/0x2b0 [ 58.304711] mmap_region+0x1f9/0x2660 [ 58.305088] do_mmap+0x854/0xf00 [ 58.305433] vm_mmap_pgoff+0x1a6/0x3a0 [ 58.305827] ksys_mmap_pgoff+0x3af/0x500 [ 58.306232] do_syscall_64+0x3f/0x90 [ 58.306615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.307139] [ 58.307313] The buggy address belongs to the object at ffff88800df29658 [ 58.307313] which belongs to the cache vm_area_struct of size 168 [ 58.308490] The buggy address is located 88 bytes inside of [ 58.308490] freed 168-byte region [ffff88800df29658, ffff88800df29700) [ 58.309620] [ 58.309798] The buggy address belongs to the physical page: [ 58.310326] page:0000000052f5f0b1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf29 [ 58.311210] memcg:ffff88800d21d901 [ 58.311554] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 58.312115] page_type: 0xffffffff() [ 58.312477] raw: 0100000000000200 ffff88800879fc80 ffffea0000344580 dead000000000003 [ 58.313221] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d21d901 [ 58.313960] page dumped because: kasan: bad access detected [ 58.314499] [ 58.314674] Memory state around the buggy address: [ 58.315152] ffff88800df29580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 58.315843] ffff88800df29600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 58.316544] >ffff88800df29680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 58.317235] ^ [ 58.317719] ffff88800df29700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 58.318424] ffff88800df29780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 58.319115] ================================================================== [ 58.320039] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 60.229182] BUG: Bad rss-counter state mm:00000000f0bcb3e9 type:MM_FILEPAGES val:33 [ 60.230173] BUG: Bad rss-counter state mm:00000000f0bcb3e9 type:MM_ANONPAGES val:22 [ 60.581767] BUG: Bad rss-counter state mm:00000000f743747f type:MM_FILEPAGES val:33 [ 60.582761] BUG: Bad rss-counter state mm:00000000f743747f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43938' (ECDSA) to the list of known hosts. 2023/06/20 06:22:32 fuzzer started 2023/06/20 06:22:32 dialing manager at localhost:44161 2023/06/20 06:22:32 checking machine... 2023/06/20 06:22:32 checking revisions... [ 61.190754] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:22:32 testing simple program... [ 61.246613] cgroup: Unknown subsys name 'net' [ 61.283159] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:22:05 Registers: info registers vcpu 0 RAX=ffff88800f7c7f48 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800f7c7f01 RSI=ffff88800f7c7f30 RDI=ffff88800f7c7f30 RBP=ffff88800f7c78c8 RSP=ffff88800f7c7800 R8 =0000000000000001 R9 =ffff88800f7c78b0 R10=0000000000038001 R11=00000000000b5311 R12=ffff88800f7c78d0 R13=ffff88800f7c78b8 R14=ffff88800f7c7f30 R15=ffff88800f7c7870 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007f25196f3900 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=00007f2519caa618 CR3=000000000ef40000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f2ced0b1000 CR3=000000000c6fe000 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=a13e2f67b8b480acb643bf4671babc0a XMM02=2c67c8bc2e329bc300000000001215e8 XMM03=fb795ef6d65770560000000000128068 XMM04=b7e37c01d1bcfda700000000000ae988 XMM05=dfcdbad4f1609c370000000000139330 XMM06=806171799158d96700000000001391b8 XMM07=e042d86d42eb936e0000000000128340 XMM08=e372b290c77d7ce70000000000121648 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000