syzkaller login: [ 27.268112] BUG: Bad rss-counter state mm:00000000b375b563 type:MM_FILEPAGES val:33 [ 27.269619] BUG: Bad rss-counter state mm:00000000b375b563 type:MM_ANONPAGES val:22 [ 27.314853] ================================================================== [ 27.315936] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.317057] Read of size 8 at addr ffff88800dcf7df0 by task sshd/219 [ 27.317970] [ 27.318227] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.319246] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.320386] Call Trace: [ 27.320774] [ 27.321105] dump_stack_lvl+0x91/0xf0 [ 27.321676] print_report+0xcc/0x620 [ 27.322242] ? __virt_addr_valid+0x102/0x340 [ 27.322894] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.323615] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.324334] kasan_report+0xbe/0xf0 [ 27.324916] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.325652] vma_interval_tree_remove+0xc75/0xec0 [ 27.326355] vma_prepare+0xc54/0x11a0 [ 27.326920] __split_vma+0x5af/0x950 [ 27.327480] ? __pfx___split_vma+0x10/0x10 [ 27.328102] ? find_held_lock+0x2c/0x110 [ 27.328722] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.329387] ? lock_is_held_type+0x9f/0x120 [ 27.330018] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.330724] ? mtree_range_walk+0x632/0x900 [ 27.331372] ? mas_walk+0x5c7/0x7c0 [ 27.331927] do_vmi_munmap+0x1f1/0x2b0 [ 27.332515] mmap_region+0x1f9/0x2660 [ 27.333084] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.333680] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.334517] ? __pfx_lock_acquire+0x10/0x10 [ 27.335137] ? __pfx_mmap_region+0x10/0x10 [ 27.335759] ? security_mmap_addr+0x7d/0xa0 [ 27.336375] ? get_unmapped_area+0x1f5/0x3f0 [ 27.337047] do_mmap+0x854/0xf00 [ 27.337562] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.338142] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.338800] ksys_mmap_pgoff+0x3af/0x500 [ 27.339398] do_syscall_64+0x3f/0x90 [ 27.339955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.340713] RIP: 0033:0x7f1155907d82 [ 27.341251] 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 [ 27.343706] RSP: 002b:00007ffe5a4336a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.344751] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1155907d82 [ 27.345720] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1154d41000 [ 27.346691] RBP: 00007f1154d41000 R08: 0000000000000009 R09: 0000000000001000 [ 27.347678] R10: 0000000000000812 R11: 0000000000000206 R12: 000056236bf7bec0 [ 27.348695] R13: 00007ffe5a4336c0 R14: 00007ffe5a4336f0 R15: 00007ffe5a433a50 [ 27.349697] [ 27.350035] [ 27.350288] Allocated by task 212: [ 27.350789] kasan_save_stack+0x22/0x50 [ 27.351372] kasan_set_track+0x25/0x30 [ 27.351945] __kasan_slab_alloc+0x59/0x70 [ 27.352559] kmem_cache_alloc+0x16b/0x370 [ 27.353163] vm_area_dup+0x20/0x160 [ 27.353687] __split_vma+0x170/0x950 [ 27.354228] split_vma+0xc6/0x110 [ 27.354742] mprotect_fixup+0x8d2/0xb30 [ 27.355328] do_mprotect_pkey+0x87e/0xd40 [ 27.355939] __x64_sys_mprotect+0x78/0xc0 [ 27.356559] do_syscall_64+0x3f/0x90 [ 27.357116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.357872] [ 27.358122] Freed by task 19: [ 27.358572] kasan_save_stack+0x22/0x50 [ 27.359167] kasan_set_track+0x25/0x30 [ 27.359744] kasan_save_free_info+0x2b/0x50 [ 27.360366] __kasan_slab_free+0x10a/0x190 [ 27.361005] kmem_cache_free+0x10d/0x4d0 [ 27.361598] rcu_core+0x8c8/0x2860 [ 27.362113] __do_softirq+0x1b7/0x7d4 [ 27.362668] [ 27.362917] Last potentially related work creation: [ 27.363601] kasan_save_stack+0x22/0x50 [ 27.364185] __kasan_record_aux_stack+0x8e/0xa0 [ 27.364866] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.365615] remove_vma+0x139/0x170 [ 27.366138] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.366784] do_vmi_munmap+0x1f1/0x2b0 [ 27.367348] __vm_munmap+0x138/0x3a0 [ 27.367898] __x64_sys_munmap+0x59/0x80 [ 27.368488] do_syscall_64+0x3f/0x90 [ 27.369039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.369781] [ 27.370030] Second to last potentially related work creation: [ 27.370825] kasan_save_stack+0x22/0x50 [ 27.371412] __kasan_record_aux_stack+0x8e/0xa0 [ 27.372081] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.372831] remove_vma+0x139/0x170 [ 27.373351] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.373999] do_vmi_munmap+0x1f1/0x2b0 [ 27.374563] __vm_munmap+0x138/0x3a0 [ 27.375111] elf_map+0x26f/0x310 [ 27.375623] load_elf_binary+0xd82/0x5030 [ 27.376227] bprm_execve+0x803/0x1940 [ 27.376780] do_execveat_common+0x734/0x8e0 [ 27.377385] __x64_sys_execve+0x93/0xc0 [ 27.377947] do_syscall_64+0x3f/0x90 [ 27.378484] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.379221] [ 27.379465] The buggy address belongs to the object at ffff88800dcf7d98 [ 27.379465] which belongs to the cache vm_area_struct of size 168 [ 27.381161] The buggy address is located 88 bytes inside of [ 27.381161] freed 168-byte region [ffff88800dcf7d98, ffff88800dcf7e40) [ 27.382763] [ 27.383010] The buggy address belongs to the physical page: [ 27.383768] page:000000006089c975 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcf7 [ 27.385015] memcg:ffff88800d4a0b01 [ 27.385503] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 27.386304] page_type: 0xffffffff() [ 27.386816] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 27.387875] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4a0b01 [ 27.388933] page dumped because: kasan: bad access detected [ 27.389693] [ 27.389936] Memory state around the buggy address: [ 27.390609] ffff88800dcf7c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 27.391593] ffff88800dcf7d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 27.392566] >ffff88800dcf7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 27.393468] ^ [ 27.394335] ffff88800dcf7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 27.395239] ffff88800dcf7e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.396140] ================================================================== [ 27.397671] Disabling lock debugging due to kernel taint [ 29.790248] BUG: Bad rss-counter state mm:0000000056d6363e type:MM_FILEPAGES val:33 [ 29.791551] BUG: Bad rss-counter state mm:0000000056d6363e type:MM_ANONPAGES val:22 [ 30.277286] BUG: Bad rss-counter state mm:0000000044c95946 type:MM_FILEPAGES val:33 [ 30.278537] BUG: Bad rss-counter state mm:0000000044c95946 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29222' (ECDSA) to the list of known hosts. 2023/06/20 01:09:20 fuzzer started 2023/06/20 01:09:20 dialing manager at localhost:44161 2023/06/20 01:09:20 checking machine... 2023/06/20 01:09:20 checking revisions... [ 30.939666] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:09:21 testing simple program... [ 30.992987] cgroup: Unknown subsys name 'net' [ 31.028244] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:09:17 Registers: info registers vcpu 0 RAX=ffffffff815ab0d0 RBX=ffff8880097e0400 RCX=0000000000000000 RDX=ffff888014203680 RSI=ffffffff814d4599 RDI=ffffc9000068d030 RBP=000000007fff0000 RSP=ffff88801580fde8 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=000000007fff0000 R13=dffffc0000000000 R14=ffff88801580fe30 R15=ffffc9000068d000 RIP=ffffffff814d45b3 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 00007f5c5caa0900 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=00007f5c5bf37440 CR3=0000000009636000 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=e04abe96c45ad8f800000000000ae988 XMM05=4b1ed657019aa51c0000000000137740 XMM06=a638d3962ebc741b0000000000136170 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864b0246 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888016eef930 RSP=ffff888016eef868 R8 =ffffffff864b024a R9 =ffff888016eef918 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff888016eef938 R13=ffff888016eef920 R14=ffff888016eef919 R15=ffff888016eef8d8 RIP=ffffffff81130ad6 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 00007f9c92a56900 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=00007ffff5d39000 CR3=000000000dac0000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000