syzkaller login: [ 30.999330] BUG: Bad rss-counter state mm:0000000070c39ace type:MM_FILEPAGES val:33 [ 31.000597] BUG: Bad rss-counter state mm:0000000070c39ace type:MM_ANONPAGES val:22 [ 31.166336] ================================================================== [ 31.167235] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.168213] Read of size 8 at addr ffff88800de73880 by task sshd/219 [ 31.169013] [ 31.169228] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.170088] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.171063] Call Trace: [ 31.171390] [ 31.171687] dump_stack_lvl+0x91/0xf0 [ 31.172188] print_report+0xcc/0x620 [ 31.172689] ? __virt_addr_valid+0x102/0x340 [ 31.173242] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.173858] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.174530] kasan_report+0xbe/0xf0 [ 31.175005] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.175638] vma_interval_tree_remove+0xc75/0xec0 [ 31.176240] vma_prepare+0xc54/0x11a0 [ 31.176750] __split_vma+0x5af/0x950 [ 31.177221] ? __pfx___split_vma+0x10/0x10 [ 31.177747] ? find_held_lock+0x2c/0x110 [ 31.178333] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.178899] ? lock_is_held_type+0x9f/0x120 [ 31.179439] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.180044] ? mtree_range_walk+0x632/0x900 [ 31.180609] ? mas_walk+0x5c7/0x7c0 [ 31.181084] do_vmi_munmap+0x1f1/0x2b0 [ 31.181578] mmap_region+0x1f9/0x2660 [ 31.182061] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.182574] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.183304] ? __pfx_lock_acquire+0x10/0x10 [ 31.183841] ? __pfx_mmap_region+0x10/0x10 [ 31.184395] ? security_mmap_addr+0x7d/0xa0 [ 31.184927] ? get_unmapped_area+0x1f5/0x3f0 [ 31.185484] do_mmap+0x854/0xf00 [ 31.185938] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.186433] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.186997] ksys_mmap_pgoff+0x3af/0x500 [ 31.187512] do_syscall_64+0x3f/0x90 [ 31.188005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.188674] RIP: 0033:0x7f87484a6d82 [ 31.189137] 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 [ 31.191279] RSP: 002b:00007fffdb80c0f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.192193] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f87484a6d82 [ 31.193057] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f87478e0000 [ 31.193920] RBP: 00007f87478e0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.194770] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557709a0cec0 [ 31.195613] R13: 00007fffdb80c110 R14: 00007fffdb80c140 R15: 00007fffdb80c4a0 [ 31.196489] [ 31.196782] [ 31.196998] Allocated by task 212: [ 31.197429] kasan_save_stack+0x22/0x50 [ 31.197936] kasan_set_track+0x25/0x30 [ 31.198430] __kasan_slab_alloc+0x59/0x70 [ 31.198954] kmem_cache_alloc+0x16b/0x370 [ 31.199468] vm_area_dup+0x20/0x160 [ 31.199924] __split_vma+0x170/0x950 [ 31.200400] split_vma+0xc6/0x110 [ 31.200846] mprotect_fixup+0x8d2/0xb30 [ 31.201347] do_mprotect_pkey+0x87e/0xd40 [ 31.201871] __x64_sys_mprotect+0x78/0xc0 [ 31.202390] do_syscall_64+0x3f/0x90 [ 31.202864] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.203501] [ 31.203718] Freed by task 212: [ 31.204113] kasan_save_stack+0x22/0x50 [ 31.204626] kasan_set_track+0x25/0x30 [ 31.205120] kasan_save_free_info+0x2b/0x50 [ 31.205653] __kasan_slab_free+0x10a/0x190 [ 31.206183] kmem_cache_free+0x10d/0x4d0 [ 31.206689] rcu_core+0x8c8/0x2860 [ 31.207135] __do_softirq+0x1b7/0x7d4 [ 31.207610] [ 31.207824] Last potentially related work creation: [ 31.208426] kasan_save_stack+0x22/0x50 [ 31.208929] __kasan_record_aux_stack+0x8e/0xa0 [ 31.209502] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.210145] remove_vma+0x139/0x170 [ 31.210596] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.211152] do_vmi_munmap+0x1f1/0x2b0 [ 31.211639] __vm_munmap+0x138/0x3a0 [ 31.212109] __x64_sys_munmap+0x59/0x80 [ 31.212617] do_syscall_64+0x3f/0x90 [ 31.213089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.213728] [ 31.213944] Second to last potentially related work creation: [ 31.214633] kasan_save_stack+0x22/0x50 [ 31.215163] __kasan_record_aux_stack+0x8e/0xa0 [ 31.215738] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.216418] remove_vma+0x139/0x170 [ 31.216901] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.217461] do_vmi_munmap+0x1f1/0x2b0 [ 31.217961] __vm_munmap+0x138/0x3a0 [ 31.218435] __x64_sys_munmap+0x59/0x80 [ 31.218933] do_syscall_64+0x3f/0x90 [ 31.219408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.220066] [ 31.220295] The buggy address belongs to the object at ffff88800de73828 [ 31.220295] which belongs to the cache vm_area_struct of size 168 [ 31.221793] The buggy address is located 88 bytes inside of [ 31.221793] freed 168-byte region [ffff88800de73828, ffff88800de738d0) [ 31.223205] [ 31.223419] The buggy address belongs to the physical page: [ 31.224079] page:000000002bda94b8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde73 [ 31.225185] memcg:ffff88800f073b01 [ 31.225613] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.226314] page_type: 0xffffffff() [ 31.226774] raw: 0100000000000200 ffff88800879fc80 ffffea0000377ec0 dead000000000007 [ 31.227701] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f073b01 [ 31.228647] page dumped because: kasan: bad access detected [ 31.229313] [ 31.229532] Memory state around the buggy address: [ 31.230127] ffff88800de73780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.230993] ffff88800de73800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.231850] >ffff88800de73880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.232750] ^ [ 31.233161] ffff88800de73900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.234024] ffff88800de73980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.234920] ================================================================== [ 31.235918] Disabling lock debugging due to kernel taint [ 33.059811] BUG: Bad rss-counter state mm:0000000028a751fe type:MM_FILEPAGES val:33 [ 33.060791] BUG: Bad rss-counter state mm:0000000028a751fe type:MM_ANONPAGES val:22 [ 33.516606] BUG: Bad rss-counter state mm:0000000056d65a8d type:MM_FILEPAGES val:33 [ 33.517509] BUG: Bad rss-counter state mm:0000000056d65a8d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50691' (ECDSA) to the list of known hosts. 2023/06/19 21:44:21 fuzzer started 2023/06/19 21:44:21 dialing manager at localhost:44161 2023/06/19 21:44:21 checking machine... 2023/06/19 21:44:21 checking revisions... [ 34.241767] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:44:21 testing simple program... [ 34.292100] cgroup: Unknown subsys name 'net' [ 34.328367] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:44:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801869fd80 RCX=0000000000000000 RDX=ffff88800e7d8000 RSI=00000000000000f4 RDI=0000000000000ec0 RBP=00000000000000f4 RSP=ffff88801869fbe0 R8 =0000000000000006 R9 =0000000000033fe0 R10=00000000000000f4 R11=0000000000000000 R12=0000000000033fe0 R13=00000000ffffffa6 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c0384 RFL=00000293 [--S-A-C] 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 00007f7b61c19900 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=00007fff14bf2000 CR3=000000000eb44000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=0000000000000001 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=00007f353923f000 CR3=000000000c922000 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=c97bb11b7144788d494ead93afbccc79 XMM02=ec2efd57dc4c00df000000000011c890 XMM03=e55c60da91528c17000000000011c960 XMM04=0fb2b1cdab39453e00000000000ae988 XMM05=19e9129bd510f2350000000000134a18 XMM06=bea6ecf89105475e0000000000133880 XMM07=e042d86d42eb936e00000000001238d0 XMM08=e55c60da91528c17000000000011c960 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000