syzkaller login: [ 39.148980] BUG: Bad rss-counter state mm:0000000067eed292 type:MM_FILEPAGES val:33 [ 39.150411] BUG: Bad rss-counter state mm:0000000067eed292 type:MM_ANONPAGES val:22 [ 39.308858] ================================================================== [ 39.309767] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.310698] Read of size 8 at addr ffff88800e07edf0 by task sshd/225 [ 39.311465] [ 39.311684] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.312659] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.313640] Call Trace: [ 39.313961] [ 39.314239] dump_stack_lvl+0x91/0xf0 [ 39.314758] print_report+0xcc/0x620 [ 39.315267] ? __virt_addr_valid+0x102/0x340 [ 39.315824] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.316428] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.317038] kasan_report+0xbe/0xf0 [ 39.317510] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.318120] vma_interval_tree_remove+0xc75/0xec0 [ 39.318715] vma_prepare+0xc54/0x11a0 [ 39.319204] __split_vma+0x5af/0x950 [ 39.319670] ? __pfx___split_vma+0x10/0x10 [ 39.320194] ? find_held_lock+0x2c/0x110 [ 39.320717] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.321280] ? lock_is_held_type+0x9f/0x120 [ 39.321817] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.322421] ? mtree_range_walk+0x632/0x900 [ 39.322986] ? mas_walk+0x5c7/0x7c0 [ 39.323459] do_vmi_munmap+0x1f1/0x2b0 [ 39.323953] mmap_region+0x1f9/0x2660 [ 39.324434] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.324947] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.325658] ? __pfx_lock_acquire+0x10/0x10 [ 39.326191] ? __pfx_mmap_region+0x10/0x10 [ 39.326719] ? security_mmap_addr+0x7d/0xa0 [ 39.327260] ? get_unmapped_area+0x1f5/0x3f0 [ 39.327808] do_mmap+0x854/0xf00 [ 39.328245] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.328739] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.329292] ksys_mmap_pgoff+0x3af/0x500 [ 39.329794] do_syscall_64+0x3f/0x90 [ 39.330265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.330921] RIP: 0033:0x7fc8b80afd82 [ 39.331371] 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 [ 39.333450] RSP: 002b:00007ffc57d5eb68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.334351] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc8b80afd82 [ 39.335227] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc8b74e9000 [ 39.336063] RBP: 00007fc8b74e9000 R08: 0000000000000009 R09: 0000000000001000 [ 39.336898] R10: 0000000000000812 R11: 0000000000000206 R12: 00005619f33bdb20 [ 39.337737] R13: 00007ffc57d5eb80 R14: 00007ffc57d5ebb0 R15: 00007ffc57d5ef10 [ 39.338576] [ 39.338876] [ 39.339089] Allocated by task 218: [ 39.339519] kasan_save_stack+0x22/0x50 [ 39.340028] kasan_set_track+0x25/0x30 [ 39.340522] __kasan_slab_alloc+0x59/0x70 [ 39.341055] kmem_cache_alloc+0x16b/0x370 [ 39.341568] vm_area_dup+0x20/0x160 [ 39.342018] __split_vma+0x170/0x950 [ 39.342486] split_vma+0xc6/0x110 [ 39.342937] mprotect_fixup+0x8d2/0xb30 [ 39.343441] do_mprotect_pkey+0x87e/0xd40 [ 39.343958] __x64_sys_mprotect+0x78/0xc0 [ 39.344482] do_syscall_64+0x3f/0x90 [ 39.344960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.345595] [ 39.345806] Freed by task 218: [ 39.346195] kasan_save_stack+0x22/0x50 [ 39.346700] kasan_set_track+0x25/0x30 [ 39.347193] kasan_save_free_info+0x2b/0x50 [ 39.347721] __kasan_slab_free+0x10a/0x190 [ 39.348248] kmem_cache_free+0x10d/0x4d0 [ 39.348753] rcu_core+0x8c8/0x2860 [ 39.349203] __do_softirq+0x1b7/0x7d4 [ 39.349677] [ 39.349888] Last potentially related work creation: [ 39.350463] kasan_save_stack+0x22/0x50 [ 39.350980] __kasan_record_aux_stack+0x8e/0xa0 [ 39.351554] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.352201] remove_vma+0x139/0x170 [ 39.352654] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.353203] do_vmi_munmap+0x1f1/0x2b0 [ 39.353683] __vm_munmap+0x138/0x3a0 [ 39.354148] __x64_sys_munmap+0x59/0x80 [ 39.354649] do_syscall_64+0x3f/0x90 [ 39.355136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.355763] [ 39.355981] The buggy address belongs to the object at ffff88800e07ed98 [ 39.355981] which belongs to the cache vm_area_struct of size 168 [ 39.357427] The buggy address is located 88 bytes inside of [ 39.357427] freed 168-byte region [ffff88800e07ed98, ffff88800e07ee40) [ 39.358816] [ 39.359031] The buggy address belongs to the physical page: [ 39.359678] page:000000007c5c60b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe07e [ 39.360739] memcg:ffff8880101c2f01 [ 39.361163] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.361799] page_type: 0xffffffff() [ 39.362242] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.363166] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880101c2f01 [ 39.364055] page dumped because: kasan: bad access detected [ 39.364704] [ 39.364921] Memory state around the buggy address: [ 39.365495] ffff88800e07ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.366351] ffff88800e07ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.367210] >ffff88800e07ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.368049] ^ [ 39.368853] ffff88800e07ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.369700] ffff88800e07ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.370540] ================================================================== [ 39.371524] Disabling lock debugging due to kernel taint [ 41.664598] BUG: Bad rss-counter state mm:00000000e79f8aca type:MM_FILEPAGES val:33 [ 41.665758] BUG: Bad rss-counter state mm:00000000e79f8aca type:MM_ANONPAGES val:22 [ 42.161981] BUG: Bad rss-counter state mm:000000005f85d321 type:MM_FILEPAGES val:33 [ 42.163279] BUG: Bad rss-counter state mm:000000005f85d321 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32084' (ECDSA) to the list of known hosts. 2023/06/20 02:30:45 fuzzer started 2023/06/20 02:30:45 dialing manager at localhost:44161 2023/06/20 02:30:45 checking machine... 2023/06/20 02:30:45 checking revisions... [ 42.796071] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:30:45 testing simple program... [ 42.853143] cgroup: Unknown subsys name 'net' [ 42.920888] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:30:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff1100d9c502f RSI=ffffffff813f3f41 RDI=ffff88806ce28178 RBP=ffff88806ce28140 RSP=ffff88806ce09ee8 R8 =0000000000000007 R9 =0000000000000000 R10=00000009c38551c0 R11=0000000000000001 R12=00000009c38551c0 R13=0000000000000003 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff813f3f8d RFL=00000046 [---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 00007f544e208900 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=00007f544d728000 CR3=000000000d786000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=aa9ff828db817e1b00000000000ae988 XMM05=786dcf7ee18f28360000000000134ec8 XMM06=ae9b264101391a5b0000000000133948 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20202000000020200000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800da5f580 RCX=0000000000000001 RDX=1ffff11001b4beb0 RSI=ffff88800da5f910 RDI=ffff88800da5f580 RBP=ffff88800da5f618 RSP=ffff88800da5f568 R8 =0000000000000001 R9 =ffff88800da5f5c0 R10=0000000000038001 R11=000000000000fc0f R12=ffff88800da5f648 R13=0000000000000000 R14=ffff888015fe0000 R15=0000000000000000 RIP=ffffffff8113035a RFL=00000212 [----A--] 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 00007f8f687ff900 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=00007fff0835f000 CR3=000000000ef16000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000