syzkaller login: [ 31.973553] BUG: Bad rss-counter state mm:00000000337d6e18 type:MM_FILEPAGES val:33 [ 31.974989] BUG: Bad rss-counter state mm:00000000337d6e18 type:MM_ANONPAGES val:22 [ 32.136773] ================================================================== [ 32.137697] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.138748] Read of size 8 at addr ffff8880096b25c8 by task sshd/219 [ 32.139641] [ 32.139866] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.140728] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.141719] Call Trace: [ 32.142044] [ 32.142333] dump_stack_lvl+0x91/0xf0 [ 32.142828] print_report+0xcc/0x620 [ 32.143305] ? __virt_addr_valid+0x102/0x340 [ 32.143898] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.144516] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.145134] kasan_report+0xbe/0xf0 [ 32.145617] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.146243] vma_interval_tree_remove+0xc75/0xec0 [ 32.146858] vma_prepare+0xc54/0x11a0 [ 32.147337] __split_vma+0x5af/0x950 [ 32.147817] ? __pfx___split_vma+0x10/0x10 [ 32.148345] ? find_held_lock+0x2c/0x110 [ 32.148868] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.149429] ? lock_is_held_type+0x9f/0x120 [ 32.149969] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.150576] ? mtree_range_walk+0x632/0x900 [ 32.151125] ? mas_walk+0x5c7/0x7c0 [ 32.151595] do_vmi_munmap+0x1f1/0x2b0 [ 32.152111] mmap_region+0x1f9/0x2660 [ 32.152593] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.153107] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.153820] ? __pfx_lock_acquire+0x10/0x10 [ 32.154351] ? __pfx_mmap_region+0x10/0x10 [ 32.154887] ? security_mmap_addr+0x7d/0xa0 [ 32.155417] ? get_unmapped_area+0x1f5/0x3f0 [ 32.155982] do_mmap+0x854/0xf00 [ 32.156421] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.156919] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.157482] ksys_mmap_pgoff+0x3af/0x500 [ 32.157989] do_syscall_64+0x3f/0x90 [ 32.158464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.159116] RIP: 0033:0x7f4391814d82 [ 32.159569] 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 [ 32.161692] RSP: 002b:00007ffd40910d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.162599] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4391814d82 [ 32.163447] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4390c4e000 [ 32.164313] RBP: 00007f4390c4e000 R08: 0000000000000009 R09: 0000000000001000 [ 32.165157] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cf20e8dd90 [ 32.166009] R13: 00007ffd40910da0 R14: 00007ffd40910dd0 R15: 00007ffd40911130 [ 32.166863] [ 32.167155] [ 32.167372] Allocated by task 212: [ 32.167813] kasan_save_stack+0x22/0x50 [ 32.168318] kasan_set_track+0x25/0x30 [ 32.168833] __kasan_slab_alloc+0x59/0x70 [ 32.169358] kmem_cache_alloc+0x16b/0x370 [ 32.169879] vm_area_dup+0x20/0x160 [ 32.170331] __split_vma+0x170/0x950 [ 32.170798] split_vma+0xc6/0x110 [ 32.171238] mprotect_fixup+0x8d2/0xb30 [ 32.171754] do_mprotect_pkey+0x87e/0xd40 [ 32.172278] __x64_sys_mprotect+0x78/0xc0 [ 32.172801] do_syscall_64+0x3f/0x90 [ 32.173267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.173907] [ 32.174126] Freed by task 212: [ 32.174519] kasan_save_stack+0x22/0x50 [ 32.175020] kasan_set_track+0x25/0x30 [ 32.175509] kasan_save_free_info+0x2b/0x50 [ 32.176052] __kasan_slab_free+0x10a/0x190 [ 32.176580] kmem_cache_free+0x10d/0x4d0 [ 32.177082] rcu_core+0x8c8/0x2860 [ 32.177525] __do_softirq+0x1b7/0x7d4 [ 32.178006] [ 32.178229] Last potentially related work creation: [ 32.178811] kasan_save_stack+0x22/0x50 [ 32.179313] __kasan_record_aux_stack+0x8e/0xa0 [ 32.179897] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.180548] remove_vma+0x139/0x170 [ 32.181000] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.181557] do_vmi_munmap+0x1f1/0x2b0 [ 32.182040] __vm_munmap+0x138/0x3a0 [ 32.182507] __x64_sys_munmap+0x59/0x80 [ 32.183001] do_syscall_64+0x3f/0x90 [ 32.183470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.184124] [ 32.184339] The buggy address belongs to the object at ffff8880096b2570 [ 32.184339] which belongs to the cache vm_area_struct of size 168 [ 32.185801] The buggy address is located 88 bytes inside of [ 32.185801] freed 168-byte region [ffff8880096b2570, ffff8880096b2618) [ 32.187208] [ 32.187423] The buggy address belongs to the physical page: [ 32.188093] page:0000000071541179 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x96b2 [ 32.189173] memcg:ffff888009ce5601 [ 32.189599] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.190237] page_type: 0xffffffff() [ 32.190684] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.191604] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009ce5601 [ 32.192532] page dumped because: kasan: bad access detected [ 32.193191] [ 32.193407] Memory state around the buggy address: [ 32.193985] ffff8880096b2480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.194836] ffff8880096b2500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 32.195707] >ffff8880096b2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.196561] ^ [ 32.197224] ffff8880096b2600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.198075] ffff8880096b2680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.198920] ================================================================== [ 32.200334] Disabling lock debugging due to kernel taint [ 34.166603] BUG: Bad rss-counter state mm:0000000065ccc94e type:MM_FILEPAGES val:33 [ 34.167944] BUG: Bad rss-counter state mm:0000000065ccc94e type:MM_ANONPAGES val:22 [ 34.667803] BUG: Bad rss-counter state mm:00000000da1240d6 type:MM_FILEPAGES val:33 [ 34.668796] BUG: Bad rss-counter state mm:00000000da1240d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43975' (ECDSA) to the list of known hosts. 2023/06/19 21:13:09 fuzzer started 2023/06/19 21:13:09 dialing manager at localhost:44161 2023/06/19 21:13:09 checking machine... 2023/06/19 21:13:09 checking revisions... [ 35.444608] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:13:10 testing simple program... [ 35.503287] cgroup: Unknown subsys name 'net' [ 35.547632] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:13:09 Registers: info registers vcpu 0 RAX=00000000b2bea6ab RBX=00000000a970a726 RCX=ffff88801479f51c RDX=0000000000000019 RSI=0000000000000017 RDI=000000009bb1aa01 RBP=ffffffff81802eb3 RSP=ffff88801479f448 R8 =0000000073edc1f2 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=0000000000000001 R13=0000000000000000 R14=ffff88801479f4b0 R15=0000000000000019 RIP=ffffffff82270e97 RFL=00000a03 [-O----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0ddf602900 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=00007f0ddea2ae70 CR3=000000000cbfa000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=66c680f664b1bada00000000000ae988 XMM05=5c47e9c0476540430000000000134c10 XMM06=dfcdbad4f1609c370000000000133ac8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff84506c8b RDX=000000000003506c RSI=000000000003506c RDI=ffffffff865bbd70 RBP=ffff8880162cf8c8 RSP=ffff8880162cf800 R8 =0000000000000000 R9 =ffff8880162cf8b0 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff8880162cf8d0 R13=ffff8880162cf8b8 R14=ffff8880162cf8b1 R15=ffff8880162cf870 RIP=ffffffff811307c2 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 00007f8feea6b900 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=00007ffe04647000 CR3=000000001466a000 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=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