syzkaller login: [ 40.457222] BUG: Bad rss-counter state mm:00000000fa58572a type:MM_FILEPAGES val:33 [ 40.458628] BUG: Bad rss-counter state mm:00000000fa58572a type:MM_ANONPAGES val:22 [ 40.597076] ================================================================== [ 40.598095] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.599037] Read of size 8 at addr ffff88801a30a880 by task sshd/219 [ 40.599913] [ 40.600136] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.601023] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.602020] Call Trace: [ 40.602342] [ 40.602628] dump_stack_lvl+0x91/0xf0 [ 40.603123] print_report+0xcc/0x620 [ 40.603609] ? __virt_addr_valid+0x102/0x340 [ 40.604170] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.604813] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.605435] kasan_report+0xbe/0xf0 [ 40.605913] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.606533] vma_interval_tree_remove+0xc75/0xec0 [ 40.607138] vma_prepare+0xc54/0x11a0 [ 40.607615] __split_vma+0x5af/0x950 [ 40.608092] ? __pfx___split_vma+0x10/0x10 [ 40.608625] ? find_held_lock+0x2c/0x110 [ 40.609166] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.609732] ? lock_is_held_type+0x9f/0x120 [ 40.610271] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.610884] ? mtree_range_walk+0x632/0x900 [ 40.611436] ? mas_walk+0x5c7/0x7c0 [ 40.611911] do_vmi_munmap+0x1f1/0x2b0 [ 40.612409] mmap_region+0x1f9/0x2660 [ 40.612903] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.613416] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.614137] ? __pfx_lock_acquire+0x10/0x10 [ 40.614682] ? __pfx_mmap_region+0x10/0x10 [ 40.615213] ? security_mmap_addr+0x7d/0xa0 [ 40.615749] ? get_unmapped_area+0x1f5/0x3f0 [ 40.616304] do_mmap+0x854/0xf00 [ 40.616765] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.617276] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.617852] ksys_mmap_pgoff+0x3af/0x500 [ 40.618364] do_syscall_64+0x3f/0x90 [ 40.618853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.619518] RIP: 0033:0x7f5454c56d82 [ 40.619984] 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 [ 40.622171] RSP: 002b:00007ffe9200b588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.623091] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5454c56d82 [ 40.623970] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5454090000 [ 40.624836] RBP: 00007f5454090000 R08: 0000000000000009 R09: 0000000000001000 [ 40.625705] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a2748b1ec0 [ 40.626565] R13: 00007ffe9200b5a0 R14: 00007ffe9200b5d0 R15: 00007ffe9200b930 [ 40.627434] [ 40.627737] [ 40.627953] Allocated by task 212: [ 40.628382] kasan_save_stack+0x22/0x50 [ 40.628907] kasan_set_track+0x25/0x30 [ 40.629411] __kasan_slab_alloc+0x59/0x70 [ 40.629945] kmem_cache_alloc+0x16b/0x370 [ 40.630468] vm_area_dup+0x20/0x160 [ 40.630937] __split_vma+0x170/0x950 [ 40.631412] split_vma+0xc6/0x110 [ 40.631856] mprotect_fixup+0x8d2/0xb30 [ 40.632368] do_mprotect_pkey+0x87e/0xd40 [ 40.632911] __x64_sys_mprotect+0x78/0xc0 [ 40.633451] do_syscall_64+0x3f/0x90 [ 40.633930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.634589] [ 40.634804] Freed by task 203: [ 40.635211] kasan_save_stack+0x22/0x50 [ 40.635720] kasan_set_track+0x25/0x30 [ 40.636221] kasan_save_free_info+0x2b/0x50 [ 40.636767] __kasan_slab_free+0x10a/0x190 [ 40.637300] kmem_cache_free+0x10d/0x4d0 [ 40.637821] rcu_core+0x8c8/0x2860 [ 40.638271] __do_softirq+0x1b7/0x7d4 [ 40.638750] [ 40.638968] Last potentially related work creation: [ 40.639568] kasan_save_stack+0x22/0x50 [ 40.640074] __kasan_record_aux_stack+0x8e/0xa0 [ 40.640654] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.641331] remove_vma+0x139/0x170 [ 40.641791] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.642358] do_vmi_munmap+0x1f1/0x2b0 [ 40.642847] __vm_munmap+0x138/0x3a0 [ 40.643326] __x64_sys_munmap+0x59/0x80 [ 40.643832] do_syscall_64+0x3f/0x90 [ 40.644319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.644973] [ 40.645191] The buggy address belongs to the object at ffff88801a30a828 [ 40.645191] which belongs to the cache vm_area_struct of size 168 [ 40.646690] The buggy address is located 88 bytes inside of [ 40.646690] freed 168-byte region [ffff88801a30a828, ffff88801a30a8d0) [ 40.648194] [ 40.648411] The buggy address belongs to the physical page: [ 40.649098] page:00000000fac6a3c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a30a [ 40.650205] memcg:ffff88800dd12101 [ 40.650658] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.651322] page_type: 0xffffffff() [ 40.651786] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.652733] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd12101 [ 40.653684] page dumped because: kasan: bad access detected [ 40.654374] [ 40.654599] Memory state around the buggy address: [ 40.655185] ffff88801a30a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 40.656022] ffff88801a30a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 40.656881] >ffff88801a30a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 40.657724] ^ [ 40.658129] ffff88801a30a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.658969] ffff88801a30a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 40.659814] ================================================================== [ 40.660865] Disabling lock debugging due to kernel taint [ 42.512118] BUG: Bad rss-counter state mm:000000008f41ba2c type:MM_FILEPAGES val:33 [ 42.513364] BUG: Bad rss-counter state mm:000000008f41ba2c type:MM_ANONPAGES val:22 [ 42.902117] BUG: Bad rss-counter state mm:00000000d19dd706 type:MM_FILEPAGES val:33 [ 42.903295] BUG: Bad rss-counter state mm:00000000d19dd706 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50682' (ECDSA) to the list of known hosts. 2023/06/19 18:48:22 fuzzer started 2023/06/19 18:48:22 dialing manager at localhost:44161 2023/06/19 18:48:22 checking machine... 2023/06/19 18:48:22 checking revisions... [ 43.531564] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:48:23 testing simple program... [ 43.588659] cgroup: Unknown subsys name 'net' [ 43.649603] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:48:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000002 RDX=1ffffd4000062105 RSI=1ffff1100fffb8b8 RDI=ffffea0000310828 RBP=ffffea0000310800 RSP=ffff8880147a79b8 R8 =0000000000000000 R9 =ffff88807ffdc648 R10=ffffea0000310930 R11=000000000000c424 R12=0000000000000002 R13=ffffea0000310980 R14=ffffea0000310900 R15=ffff88807ffdc500 RIP=ffffffff81789b92 RFL=00000046 [---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 00007ff2e444a900 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=00007ff2e385f5a0 CR3=0000000009b44000 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=3af928ca613e3b3400000000000ae988 XMM05=629d15c675bc488700000000001341b0 XMM06=cb73f0573b0911510000000000132910 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888019e0f9f0 RCX=ffff888019e0f9f8 RDX=ffff888019e10000 RSI=1ffff110033c1f2d RDI=ffff888019e0f958 RBP=dffffc0000000000 RSP=ffff888019e0f8f8 R8 =0000000000000000 R9 =0000000000000000 R10=ffff888019e0f958 R11=00000000000b6996 R12=ffffed10033c1f2d R13=ffffed10033c1f2c R14=ffff888019e0f9a0 R15=ffff888019e0f958 RIP=ffffffff811305e0 RFL=00000216 [----AP-] 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 00007f55a4219900 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=00007ffcd7bdc000 CR3=0000000018c2a000 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