syzkaller login: [ 31.492780] BUG: Bad rss-counter state mm:0000000091969284 type:MM_FILEPAGES val:33 [ 31.493489] BUG: Bad rss-counter state mm:0000000091969284 type:MM_ANONPAGES val:22 [ 31.614107] ================================================================== [ 31.614830] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.615480] Read of size 8 at addr ffff888019c95798 by task sshd/219 [ 31.616048] [ 31.616225] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.616841] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.617505] Call Trace: [ 31.617736] [ 31.617946] dump_stack_lvl+0x91/0xf0 [ 31.618339] print_report+0xcc/0x620 [ 31.618856] ? __virt_addr_valid+0x102/0x340 [ 31.619303] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.619768] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.620209] kasan_report+0xbe/0xf0 [ 31.620531] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.620967] vma_interval_tree_remove+0xc75/0xec0 [ 31.621405] vma_prepare+0xc54/0x11a0 [ 31.621757] __split_vma+0x5af/0x950 [ 31.622108] ? __pfx___split_vma+0x10/0x10 [ 31.622487] ? find_held_lock+0x2c/0x110 [ 31.622867] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.623250] ? lock_is_held_type+0x9f/0x120 [ 31.623611] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.624048] ? mtree_range_walk+0x632/0x900 [ 31.624453] ? mas_walk+0x5c7/0x7c0 [ 31.624797] do_vmi_munmap+0x1f1/0x2b0 [ 31.625147] mmap_region+0x1f9/0x2660 [ 31.625496] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.625880] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.626379] ? __pfx_lock_acquire+0x10/0x10 [ 31.626737] ? __pfx_mmap_region+0x10/0x10 [ 31.627092] ? security_mmap_addr+0x7d/0xa0 [ 31.627453] ? get_unmapped_area+0x1f5/0x3f0 [ 31.627858] do_mmap+0x854/0xf00 [ 31.628231] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.628644] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.629128] ksys_mmap_pgoff+0x3af/0x500 [ 31.629490] do_syscall_64+0x3f/0x90 [ 31.629819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.630294] RIP: 0033:0x7f0989421d82 [ 31.630639] 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 [ 31.632124] RSP: 002b:00007fffd790e888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.632812] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0989421d82 [ 31.633416] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f098885b000 [ 31.633994] RBP: 00007f098885b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.634577] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564adc815d90 [ 31.635156] R13: 00007fffd790e8a0 R14: 00007fffd790e8d0 R15: 00007fffd790ec30 [ 31.635791] [ 31.635989] [ 31.636142] Allocated by task 212: [ 31.636442] kasan_save_stack+0x22/0x50 [ 31.636798] kasan_set_track+0x25/0x30 [ 31.637133] __kasan_slab_alloc+0x59/0x70 [ 31.637489] kmem_cache_alloc+0x16b/0x370 [ 31.637838] vm_area_dup+0x20/0x160 [ 31.638149] __split_vma+0x170/0x950 [ 31.638481] split_vma+0xc6/0x110 [ 31.638827] mprotect_fixup+0x8d2/0xb30 [ 31.639170] do_mprotect_pkey+0x87e/0xd40 [ 31.639521] __x64_sys_mprotect+0x78/0xc0 [ 31.639893] do_syscall_64+0x3f/0x90 [ 31.640219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.640670] [ 31.640825] Freed by task 212: [ 31.641102] kasan_save_stack+0x22/0x50 [ 31.641448] kasan_set_track+0x25/0x30 [ 31.641784] kasan_save_free_info+0x2b/0x50 [ 31.642158] __kasan_slab_free+0x10a/0x190 [ 31.642529] kmem_cache_free+0x10d/0x4d0 [ 31.642877] rcu_core+0x8c8/0x2860 [ 31.643207] __do_softirq+0x1b7/0x7d4 [ 31.643569] [ 31.643740] Last potentially related work creation: [ 31.644156] kasan_save_stack+0x22/0x50 [ 31.644513] __kasan_record_aux_stack+0x8e/0xa0 [ 31.644917] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.645368] remove_vma+0x139/0x170 [ 31.645687] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.646078] do_vmi_munmap+0x1f1/0x2b0 [ 31.646419] __vm_munmap+0x138/0x3a0 [ 31.646751] __x64_sys_munmap+0x59/0x80 [ 31.647102] do_syscall_64+0x3f/0x90 [ 31.647440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.647917] [ 31.648068] The buggy address belongs to the object at ffff888019c95740 [ 31.648068] which belongs to the cache vm_area_struct of size 168 [ 31.649103] The buggy address is located 88 bytes inside of [ 31.649103] freed 168-byte region [ffff888019c95740, ffff888019c957e8) [ 31.650079] [ 31.650240] The buggy address belongs to the physical page: [ 31.650710] page:00000000389f8fc6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c95 [ 31.651471] memcg:ffff88800e8b0f01 [ 31.651781] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.652227] page_type: 0xffffffff() [ 31.652542] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.653182] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8b0f01 [ 31.653808] page dumped because: kasan: bad access detected [ 31.654282] [ 31.654433] Memory state around the buggy address: [ 31.654823] ffff888019c95680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.655398] ffff888019c95700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.656006] >ffff888019c95780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.656589] ^ [ 31.656932] ffff888019c95800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.657516] ffff888019c95880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.658062] ================================================================== [ 31.658748] Disabling lock debugging due to kernel taint [ 33.303737] BUG: Bad rss-counter state mm:00000000c80f0321 type:MM_FILEPAGES val:33 [ 33.304574] BUG: Bad rss-counter state mm:00000000c80f0321 type:MM_ANONPAGES val:22 [ 33.691657] BUG: Bad rss-counter state mm:0000000095cecd2c type:MM_FILEPAGES val:33 [ 33.692381] BUG: Bad rss-counter state mm:0000000095cecd2c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8965' (ECDSA) to the list of known hosts. 2023/06/20 09:46:10 fuzzer started 2023/06/20 09:46:10 dialing manager at localhost:44161 2023/06/20 09:46:11 checking machine... 2023/06/20 09:46:11 checking revisions... [ 34.276847] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:46:11 testing simple program... [ 34.326943] cgroup: Unknown subsys name 'net' [ 34.373038] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:46:10 Registers: info registers vcpu 0 RAX=00005561aeabe0c7 RBX=00007ffd6ca272e0 RCX=0000000000000007 RDX=0000000000000001 RSI=0000000000000001 RDI=00005561aeabe0c0 RBP=0000000000000010 RSP=00007ffd6ca272b0 R8 =00005561aeac2215 R9 =00007fb3bce2ebe0 R10=0000000000100000 R11=0000000000000246 R12=00005561aeabe0c0 R13=00007ffd6ca272d8 R14=00007fb3bc857b22 R15=00007fb3bc87c710 RIP=00007fb3bccff440 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb3bc87c900 00000000 00000000 GS =0000 0000000000000000 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=00007fb3bce31650 CR3=000000001736c000 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=23232323232323232323232323232323 XMM01=00000053000002a03b031b01003d0920 XMM02=ff000000000000000000000000000000 XMM03=00303030303609090958414d5f444947 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=000000000000000000ffffffffffffff XMM08=00303030303609090958414d5f444947 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007efc819cee29 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=00007efc819cee29 RSP=ffff8880143374d8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=ffff8880143375e0 R13=0000000000000000 R14=ffff88800f938000 R15=0000000000000d40 RIP=ffffffff811fc7e8 RFL=00000282 [--S----] 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 00007efc80e4a900 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=00007efc802f1ba8 CR3=000000000ce12000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f4531ce823b2f08000000000000ae988 XMM05=82954d378a3c1c180000000000134770 XMM06=4fda316b135da52b0000000000133560 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000