syzkaller login: [ 100.095383] BUG: Bad rss-counter state mm:000000004806c1bc type:MM_FILEPAGES val:33 [ 100.096782] BUG: Bad rss-counter state mm:000000004806c1bc type:MM_ANONPAGES val:22 [ 100.280139] ================================================================== [ 100.281222] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 100.282458] Read of size 8 at addr ffff88800e444228 by task sshd/218 [ 100.283366] [ 100.283621] CPU: 0 PID: 218 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 100.284856] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 100.285997] Call Trace: [ 100.286375] [ 100.286709] dump_stack_lvl+0x91/0xf0 [ 100.287294] print_report+0xcc/0x620 [ 100.287898] ? __virt_addr_valid+0x102/0x340 [ 100.288561] ? vma_interval_tree_remove+0xc75/0xec0 [ 100.289291] ? vma_interval_tree_remove+0xc75/0xec0 [ 100.290036] kasan_report+0xbe/0xf0 [ 100.290617] ? vma_interval_tree_remove+0xc75/0xec0 [ 100.291387] vma_interval_tree_remove+0xc75/0xec0 [ 100.292140] vma_prepare+0xc54/0x11a0 [ 100.292716] __split_vma+0x5af/0x950 [ 100.293291] ? __pfx___split_vma+0x10/0x10 [ 100.293927] ? find_held_lock+0x2c/0x110 [ 100.294568] do_vmi_align_munmap+0x2ba/0x11f0 [ 100.295265] ? lock_is_held_type+0x9f/0x120 [ 100.295929] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 100.296670] ? mtree_range_walk+0x632/0x900 [ 100.297351] ? mas_walk+0x5c7/0x7c0 [ 100.297930] do_vmi_munmap+0x1f1/0x2b0 [ 100.298532] mmap_region+0x1f9/0x2660 [ 100.299122] ? vm_mmap_pgoff+0x15c/0x3a0 [ 100.299781] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 100.300650] ? __pfx_lock_acquire+0x10/0x10 [ 100.301303] ? __pfx_mmap_region+0x10/0x10 [ 100.301955] ? security_mmap_addr+0x7d/0xa0 [ 100.302599] ? get_unmapped_area+0x1f5/0x3f0 [ 100.303266] do_mmap+0x854/0xf00 [ 100.303809] vm_mmap_pgoff+0x1a6/0x3a0 [ 100.304406] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 100.305087] ksys_mmap_pgoff+0x3af/0x500 [ 100.305699] do_syscall_64+0x3f/0x90 [ 100.306273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 100.307054] RIP: 0033:0x7f1333a13d82 [ 100.307609] 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 [ 100.310211] RSP: 002b:00007ffc2f1a9938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 100.311315] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1333a13d82 [ 100.312368] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1332e4d000 [ 100.313385] RBP: 00007f1332e4d000 R08: 0000000000000009 R09: 0000000000001000 [ 100.314405] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fd991f1ec0 [ 100.315431] R13: 00007ffc2f1a9950 R14: 00007ffc2f1a9980 R15: 00007ffc2f1a9ce0 [ 100.316484] [ 100.316838] [ 100.317099] Allocated by task 211: [ 100.317612] kasan_save_stack+0x22/0x50 [ 100.318228] kasan_set_track+0x25/0x30 [ 100.318820] __kasan_slab_alloc+0x59/0x70 [ 100.319449] kmem_cache_alloc+0x16b/0x370 [ 100.320088] vm_area_dup+0x20/0x160 [ 100.320639] __split_vma+0x170/0x950 [ 100.321205] split_vma+0xc6/0x110 [ 100.321740] mprotect_fixup+0x8d2/0xb30 [ 100.322351] do_mprotect_pkey+0x87e/0xd40 [ 100.322987] __x64_sys_mprotect+0x78/0xc0 [ 100.323618] do_syscall_64+0x3f/0x90 [ 100.324221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 100.324999] [ 100.325259] Freed by task 202: [ 100.325734] kasan_save_stack+0x22/0x50 [ 100.326341] kasan_set_track+0x25/0x30 [ 100.326927] kasan_save_free_info+0x2b/0x50 [ 100.327575] __kasan_slab_free+0x10a/0x190 [ 100.328236] kmem_cache_free+0x10d/0x4d0 [ 100.328859] rcu_core+0x8c8/0x2860 [ 100.329398] __do_softirq+0x1b7/0x7d4 [ 100.329971] [ 100.330234] Last potentially related work creation: [ 100.330949] kasan_save_stack+0x22/0x50 [ 100.331564] __kasan_record_aux_stack+0x8e/0xa0 [ 100.332277] __call_rcu_common.constprop.0+0x6a/0xb90 [ 100.333065] remove_vma+0x139/0x170 [ 100.333613] do_vmi_align_munmap+0xd4a/0x11f0 [ 100.334290] do_vmi_munmap+0x1f1/0x2b0 [ 100.334877] __vm_munmap+0x138/0x3a0 [ 100.335437] __x64_sys_munmap+0x59/0x80 [ 100.336065] do_syscall_64+0x3f/0x90 [ 100.336629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 100.337412] [ 100.337670] The buggy address belongs to the object at ffff88800e4441d0 [ 100.337670] which belongs to the cache vm_area_struct of size 168 [ 100.339436] The buggy address is located 88 bytes inside of [ 100.339436] freed 168-byte region [ffff88800e4441d0, ffff88800e444278) [ 100.341126] [ 100.341390] The buggy address belongs to the physical page: [ 100.342182] page:00000000cff83683 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe444 [ 100.343483] memcg:ffff88800d178001 [ 100.344046] flags: 0x100000000000200(slab|node=0|zone=1) [ 100.344821] page_type: 0xffffffff() [ 100.345370] raw: 0100000000000200 ffff88800879fc80 ffffea00003c6900 dead00000000000a [ 100.346470] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d178001 [ 100.347569] page dumped because: kasan: bad access detected [ 100.348374] [ 100.348631] Memory state around the buggy address: [ 100.349338] ffff88800e444100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 100.350365] ffff88800e444180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 100.351395] >ffff88800e444200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 100.352438] ^ [ 100.353104] ffff88800e444280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 100.354118] ffff88800e444300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 100.355133] ================================================================== [ 100.356373] Disabling lock debugging due to kernel taint [ 102.302498] BUG: Bad rss-counter state mm:00000000c6b81d68 type:MM_FILEPAGES val:33 [ 102.304172] BUG: Bad rss-counter state mm:00000000c6b81d68 type:MM_ANONPAGES val:22 [ 102.781296] BUG: Bad rss-counter state mm:00000000ef669174 type:MM_FILEPAGES val:33 [ 102.782537] BUG: Bad rss-counter state mm:00000000ef669174 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40138' (ECDSA) to the list of known hosts. 2023/06/20 03:47:50 fuzzer started 2023/06/20 03:47:50 dialing manager at localhost:44161 2023/06/20 03:47:50 checking machine... 2023/06/20 03:47:50 checking revisions... [ 103.533024] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:47:50 testing simple program... [ 103.576591] cgroup: Unknown subsys name 'net' [ 103.626497] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:46:40 Registers: info registers vcpu 0 RAX=00000000000b6996 RBX=0000000000000001 RCX=ffffffff846000a9 RDX=00000000000b6998 RSI=0000000000036000 RDI=ffffffff864b9d5c RBP=ffff888015837a40 RSP=ffff888015837978 R8 =ffffffff864b9d50 R9 =ffff888015837a28 R10=0000000000038001 R11=00000000000b6996 R12=ffff888015837a48 R13=ffff888015837a30 R14=ffff888015837a29 R15=ffff8880158379e8 RIP=ffffffff81130868 RFL=00000287 [--S--PC] 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 00007f1869e19900 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=00007f1869264b00 CR3=000000000908c000 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=14dcf7b16653046500000000000ae988 XMM05=4d66297aacdf14b80000000000144950 XMM06=bdf2e299e47b49d500000000001433d0 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=ffffffff811431b8 RDX=ffff888018399b40 RSI=0000000000000000 RDI=0000000000000006 RBP=000000000951a7e8 RSP=ffff8880180efb78 R8 =0000000000000006 R9 =0000000000000001 R10=0000000000080000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000080000 R14=ffff88801659d1c8 R15=ffff88801659d218 RIP=ffffffff814c01fc 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 00007fc7a3f1a900 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=00007fff440d1000 CR3=000000000e21e000 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=563412feff00545000000000000080fe 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