syzkaller login: [ 40.568381] BUG: Bad rss-counter state mm:00000000a9849bda type:MM_FILEPAGES val:33 [ 40.569520] BUG: Bad rss-counter state mm:00000000a9849bda type:MM_ANONPAGES val:22 [ 40.744446] ================================================================== [ 40.745378] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.746476] Read of size 8 at addr ffff88800e799310 by task sshd/220 [ 40.747300] [ 40.747524] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.748422] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.749407] Call Trace: [ 40.749768] [ 40.750068] dump_stack_lvl+0x91/0xf0 [ 40.750585] print_report+0xcc/0x620 [ 40.751071] ? __virt_addr_valid+0x102/0x340 [ 40.751636] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.752283] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.752923] kasan_report+0xbe/0xf0 [ 40.753418] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.754077] vma_interval_tree_remove+0xc75/0xec0 [ 40.754699] vma_prepare+0xc54/0x11a0 [ 40.755204] __split_vma+0x5af/0x950 [ 40.755691] ? __pfx___split_vma+0x10/0x10 [ 40.756244] ? find_held_lock+0x2c/0x110 [ 40.756791] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.757379] ? lock_is_held_type+0x9f/0x120 [ 40.757961] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.758597] ? mtree_range_walk+0x632/0x900 [ 40.759166] ? mas_walk+0x5c7/0x7c0 [ 40.759661] do_vmi_munmap+0x1f1/0x2b0 [ 40.760176] mmap_region+0x1f9/0x2660 [ 40.760674] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.761207] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.761959] ? __pfx_lock_acquire+0x10/0x10 [ 40.762515] ? __pfx_mmap_region+0x10/0x10 [ 40.763072] ? security_mmap_addr+0x7d/0xa0 [ 40.763622] ? get_unmapped_area+0x1f5/0x3f0 [ 40.764186] do_mmap+0x854/0xf00 [ 40.764634] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.765146] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.765732] ksys_mmap_pgoff+0x3af/0x500 [ 40.766255] do_syscall_64+0x3f/0x90 [ 40.766747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.767413] RIP: 0033:0x7fe7cdb32d82 [ 40.767888] 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 [ 40.770104] RSP: 002b:00007fff1a3a8838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.771039] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe7cdb32d82 [ 40.771913] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe7ccf6c000 [ 40.772789] RBP: 00007fe7ccf6c000 R08: 0000000000000009 R09: 0000000000001000 [ 40.773713] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b9a6d9a980 [ 40.774591] R13: 00007fff1a3a8850 R14: 00007fff1a3a8880 R15: 00007fff1a3a8be0 [ 40.775476] [ 40.775778] [ 40.775998] Allocated by task 213: [ 40.776441] kasan_save_stack+0x22/0x50 [ 40.776963] kasan_set_track+0x25/0x30 [ 40.777472] __kasan_slab_alloc+0x59/0x70 [ 40.778018] kmem_cache_alloc+0x16b/0x370 [ 40.778544] vm_area_dup+0x20/0x160 [ 40.779011] __split_vma+0x170/0x950 [ 40.779492] split_vma+0xc6/0x110 [ 40.779952] mprotect_fixup+0x8d2/0xb30 [ 40.780464] do_mprotect_pkey+0x87e/0xd40 [ 40.781002] __x64_sys_mprotect+0x78/0xc0 [ 40.781535] do_syscall_64+0x3f/0x90 [ 40.782047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.782702] [ 40.782921] Freed by task 210: [ 40.783322] kasan_save_stack+0x22/0x50 [ 40.783842] kasan_set_track+0x25/0x30 [ 40.784350] kasan_save_free_info+0x2b/0x50 [ 40.784910] __kasan_slab_free+0x10a/0x190 [ 40.785464] kmem_cache_free+0x10d/0x4d0 [ 40.785991] rcu_core+0x8c8/0x2860 [ 40.786443] __do_softirq+0x1b7/0x7d4 [ 40.786933] [ 40.787152] Last potentially related work creation: [ 40.787752] kasan_save_stack+0x22/0x50 [ 40.788267] __kasan_record_aux_stack+0x8e/0xa0 [ 40.788863] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.789526] remove_vma+0x139/0x170 [ 40.790002] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.790577] do_vmi_munmap+0x1f1/0x2b0 [ 40.791081] __vm_munmap+0x138/0x3a0 [ 40.791566] __x64_sys_munmap+0x59/0x80 [ 40.792074] do_syscall_64+0x3f/0x90 [ 40.792588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.793342] [ 40.793590] Second to last potentially related work creation: [ 40.794389] kasan_save_stack+0x22/0x50 [ 40.794957] __kasan_record_aux_stack+0x8e/0xa0 [ 40.795594] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.796311] remove_vma+0x139/0x170 [ 40.796812] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.797445] do_vmi_munmap+0x1f1/0x2b0 [ 40.798016] mmap_region+0x1f9/0x2660 [ 40.798549] do_mmap+0x854/0xf00 [ 40.799029] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.799576] ksys_mmap_pgoff+0x3af/0x500 [ 40.800135] do_syscall_64+0x3f/0x90 [ 40.800672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.801384] [ 40.801626] The buggy address belongs to the object at ffff88800e7992b8 [ 40.801626] which belongs to the cache vm_area_struct of size 168 [ 40.803345] The buggy address is located 88 bytes inside of [ 40.803345] freed 168-byte region [ffff88800e7992b8, ffff88800e799360) [ 40.804988] [ 40.805239] The buggy address belongs to the physical page: [ 40.806034] page:000000002d7ac3c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe799 [ 40.807288] memcg:ffff88800e397e01 [ 40.807763] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.808543] page_type: 0xffffffff() [ 40.809046] raw: 0100000000000200 ffff88800879fc80 ffffea00003833c0 dead000000000003 [ 40.810075] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e397e01 [ 40.811083] page dumped because: kasan: bad access detected [ 40.811821] [ 40.812062] Memory state around the buggy address: [ 40.812702] ffff88800e799200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 40.813682] ffff88800e799280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 40.814666] >ffff88800e799300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 40.815638] ^ [ 40.816182] ffff88800e799380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.817161] ffff88800e799400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 40.818162] ================================================================== [ 40.819347] Disabling lock debugging due to kernel taint [ 42.784155] BUG: Bad rss-counter state mm:00000000ac7a6404 type:MM_FILEPAGES val:33 [ 42.785761] BUG: Bad rss-counter state mm:00000000ac7a6404 type:MM_ANONPAGES val:22 [ 43.298942] BUG: Bad rss-counter state mm:00000000e920c40c type:MM_FILEPAGES val:33 [ 43.299936] BUG: Bad rss-counter state mm:00000000e920c40c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53192' (ECDSA) to the list of known hosts. 2023/06/19 11:05:13 fuzzer started 2023/06/19 11:05:13 dialing manager at localhost:44161 2023/06/19 11:05:13 checking machine... 2023/06/19 11:05:13 checking revisions... [ 44.014098] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:05:13 testing simple program... [ 44.053556] cgroup: Unknown subsys name 'net' [ 44.095343] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:05:03 Registers: info registers vcpu 0 RAX=ffffffff81132d45 RBX=ffffffff85d91630 RCX=ffffffff81132ffd RDX=0000000000000000 RSI=ffffffff86096756 RDI=ffffffff85d91630 RBP=ffffffff85d91630 RSP=ffff888016e773b8 R8 =ffffffff86096756 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffffffff85d91630 R13=ffffffff85d91630 R14=ffffffff85d91630 R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000206 [-----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 00007f853aaab700 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=00007f0bd58f7910 CR3=0000000016f28000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303139 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=dffffc0000000000 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000001 RDI=ffffffff85d3bed0 RBP=ffff888008d71b40 RSP=ffff888008d87e38 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=1ffff1100d9e7479 R12=ffffed10011ae368 R13=ffff88806cf35000 R14=0000000000000000 R15=ffff888008d71b40 RIP=ffffffff8136abf6 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 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=00007fffac297000 CR3=000000000ef9a000 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=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