syzkaller login: [ 98.998016] BUG: Bad rss-counter state mm:000000008b936fa0 type:MM_FILEPAGES val:33 [ 98.999578] BUG: Bad rss-counter state mm:000000008b936fa0 type:MM_ANONPAGES val:22 [ 99.162038] ================================================================== [ 99.162975] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 99.163935] Read of size 8 at addr ffff888019784228 by task sshd/222 [ 99.164920] [ 99.165142] CPU: 1 PID: 222 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 99.166182] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 99.167208] Call Trace: [ 99.167534] [ 99.167823] dump_stack_lvl+0x91/0xf0 [ 99.168323] print_report+0xcc/0x620 [ 99.168837] ? __virt_addr_valid+0x102/0x340 [ 99.169395] ? vma_interval_tree_remove+0xc75/0xec0 [ 99.170023] ? vma_interval_tree_remove+0xc75/0xec0 [ 99.170648] kasan_report+0xbe/0xf0 [ 99.171134] ? vma_interval_tree_remove+0xc75/0xec0 [ 99.171766] vma_interval_tree_remove+0xc75/0xec0 [ 99.172387] vma_prepare+0xc54/0x11a0 [ 99.172889] __split_vma+0x5af/0x950 [ 99.173370] ? __pfx___split_vma+0x10/0x10 [ 99.173912] ? find_held_lock+0x2c/0x110 [ 99.174451] do_vmi_align_munmap+0x2ba/0x11f0 [ 99.175035] ? lock_is_held_type+0x9f/0x120 [ 99.175590] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 99.176211] ? mtree_range_walk+0x632/0x900 [ 99.176783] ? mas_walk+0x5c7/0x7c0 [ 99.177276] do_vmi_munmap+0x1f1/0x2b0 [ 99.177779] mmap_region+0x1f9/0x2660 [ 99.178272] ? vm_mmap_pgoff+0x15c/0x3a0 [ 99.178797] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 99.179528] ? __pfx_lock_acquire+0x10/0x10 [ 99.180077] ? __pfx_mmap_region+0x10/0x10 [ 99.180641] ? security_mmap_addr+0x7d/0xa0 [ 99.181216] ? get_unmapped_area+0x1f5/0x3f0 [ 99.181788] do_mmap+0x854/0xf00 [ 99.182242] vm_mmap_pgoff+0x1a6/0x3a0 [ 99.182766] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 99.183348] ksys_mmap_pgoff+0x3af/0x500 [ 99.183867] do_syscall_64+0x3f/0x90 [ 99.184355] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 99.185036] RIP: 0033:0x7f1190dfbd82 [ 99.185523] 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 [ 99.187736] RSP: 002b:00007fff1d643468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 99.188659] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1190dfbd82 [ 99.189529] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1190235000 [ 99.190395] RBP: 00007f1190235000 R08: 0000000000000009 R09: 0000000000001000 [ 99.191262] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d201b1980 [ 99.192118] R13: 00007fff1d643480 R14: 00007fff1d6434b0 R15: 00007fff1d643810 [ 99.193004] [ 99.193302] [ 99.193521] Allocated by task 214: [ 99.193956] kasan_save_stack+0x22/0x50 [ 99.194503] kasan_set_track+0x25/0x30 [ 99.195001] __kasan_slab_alloc+0x59/0x70 [ 99.195535] kmem_cache_alloc+0x16b/0x370 [ 99.196063] vm_area_dup+0x20/0x160 [ 99.196519] __split_vma+0x170/0x950 [ 99.197006] split_vma+0xc6/0x110 [ 99.197471] mprotect_fixup+0x8d2/0xb30 [ 99.197995] do_mprotect_pkey+0x87e/0xd40 [ 99.198546] __x64_sys_mprotect+0x78/0xc0 [ 99.199096] do_syscall_64+0x3f/0x90 [ 99.199592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 99.200269] [ 99.200497] Freed by task 19: [ 99.200904] kasan_save_stack+0x22/0x50 [ 99.201440] kasan_set_track+0x25/0x30 [ 99.201961] kasan_save_free_info+0x2b/0x50 [ 99.202528] __kasan_slab_free+0x10a/0x190 [ 99.203095] kmem_cache_free+0x10d/0x4d0 [ 99.203631] rcu_core+0x8c8/0x2860 [ 99.204097] __do_softirq+0x1b7/0x7d4 [ 99.204774] [ 99.205030] Last potentially related work creation: [ 99.205647] kasan_save_stack+0x22/0x50 [ 99.206246] __kasan_record_aux_stack+0x8e/0xa0 [ 99.206853] __call_rcu_common.constprop.0+0x6a/0xb90 [ 99.207529] remove_vma+0x139/0x170 [ 99.208006] do_vmi_align_munmap+0xd4a/0x11f0 [ 99.208598] do_vmi_munmap+0x1f1/0x2b0 [ 99.209130] __vm_munmap+0x138/0x3a0 [ 99.209621] __x64_sys_munmap+0x59/0x80 [ 99.210143] do_syscall_64+0x3f/0x90 [ 99.210639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 99.211316] [ 99.211539] Second to last potentially related work creation: [ 99.212264] kasan_save_stack+0x22/0x50 [ 99.212810] __kasan_record_aux_stack+0x8e/0xa0 [ 99.213413] __call_rcu_common.constprop.0+0x6a/0xb90 [ 99.214092] remove_vma+0x139/0x170 [ 99.214567] do_vmi_align_munmap+0xd4a/0x11f0 [ 99.215154] do_vmi_munmap+0x1f1/0x2b0 [ 99.215672] mmap_region+0x1f9/0x2660 [ 99.216174] do_mmap+0x854/0xf00 [ 99.216636] vm_mmap_pgoff+0x1a6/0x3a0 [ 99.217164] ksys_mmap_pgoff+0x3af/0x500 [ 99.217690] do_syscall_64+0x3f/0x90 [ 99.218194] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 99.218872] [ 99.219094] The buggy address belongs to the object at ffff8880197841d0 [ 99.219094] which belongs to the cache vm_area_struct of size 168 [ 99.220667] The buggy address is located 88 bytes inside of [ 99.220667] freed 168-byte region [ffff8880197841d0, ffff888019784278) [ 99.222147] [ 99.222375] The buggy address belongs to the physical page: [ 99.223073] page:00000000d30b8afb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19784 [ 99.224234] memcg:ffff8880094f8201 [ 99.224690] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 99.225429] page_type: 0xffffffff() [ 99.225903] raw: 0100000000000200 ffff88800879fc80 ffffea0000356a40 dead000000000005 [ 99.226877] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094f8201 [ 99.227834] page dumped because: kasan: bad access detected [ 99.228527] [ 99.228769] Memory state around the buggy address: [ 99.229382] ffff888019784100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 99.230289] ffff888019784180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 99.231199] >ffff888019784200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 99.232099] ^ [ 99.232737] ffff888019784280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 99.233680] ffff888019784300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 99.234575] ================================================================== [ 99.235641] Disabling lock debugging due to kernel taint [ 101.181028] BUG: Bad rss-counter state mm:00000000a2260338 type:MM_FILEPAGES val:33 [ 101.182394] BUG: Bad rss-counter state mm:00000000a2260338 type:MM_ANONPAGES val:22 [ 101.669515] BUG: Bad rss-counter state mm:000000005fe029df type:MM_FILEPAGES val:33 [ 101.671018] BUG: Bad rss-counter state mm:000000005fe029df type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23029' (ECDSA) to the list of known hosts. 2023/06/19 19:50:33 fuzzer started 2023/06/19 19:50:33 dialing manager at localhost:44161 2023/06/19 19:50:33 checking machine... 2023/06/19 19:50:33 checking revisions... [ 102.393893] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:50:33 testing simple program... [ 102.440800] cgroup: Unknown subsys name 'net' [ 102.498620] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:49:22 Registers: info registers vcpu 0 RAX=1ffff110032d555c RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88800e57b680 RSI=00007ffecafcd7ac RDI=00007ffecafb3000 RBP=00007ffecafcd7ac RSP=ffff88801b9a7de0 R8 =0000000000000004 R9 =0000000000000001 R10=0000000000000110 R11=0000000000000000 R12=ffff8880196aaae0 R13=00007ffecafb3000 R14=0000000000000001 R15=ffff8880196aab10 RIP=ffffffff814c02f0 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f372f523900 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=00007ffecafcd7ac CR3=000000001a9e8000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=3c616e302061657420322e322e1c1400 XMM07=672065736f6c635f6e6f69737365733a 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 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=00007f8bc0bc3240 CR3=000000000c60e000 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=0c05e0d6f0edc5822147835c302efa1c XMM02=ec2efd57dc4c00df000000000012bf00 XMM03=e9f1687ff0e488b7000000000012bfd0 XMM04=d5df8ba0d0abedc700000000000ae988 XMM05=59d5b690e0af863b0000000000144858 XMM06=bfe3559ca31ac0ce0000000000142f58 XMM07=e042d86d42eb936e0000000000133d20 XMM08=e9f1687ff0e488b7000000000012bfd0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000