syzkaller login: [ 48.262143] BUG: Bad rss-counter state mm:00000000e9ae7732 type:MM_FILEPAGES val:33 [ 48.263546] BUG: Bad rss-counter state mm:00000000e9ae7732 type:MM_ANONPAGES val:22 [ 48.431139] ================================================================== [ 48.432271] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.433526] Read of size 8 at addr ffff888016489880 by task sshd/220 [ 48.434333] [ 48.434552] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.435425] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.436405] Call Trace: [ 48.436735] [ 48.437024] dump_stack_lvl+0x91/0xf0 [ 48.437516] print_report+0xcc/0x620 [ 48.438009] ? __virt_addr_valid+0x102/0x340 [ 48.438572] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.439194] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.439830] kasan_report+0xbe/0xf0 [ 48.440306] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.440961] vma_interval_tree_remove+0xc75/0xec0 [ 48.441595] vma_prepare+0xc54/0x11a0 [ 48.442112] __split_vma+0x5af/0x950 [ 48.442618] ? __pfx___split_vma+0x10/0x10 [ 48.443243] ? find_held_lock+0x2c/0x110 [ 48.443833] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.444440] ? lock_is_held_type+0x9f/0x120 [ 48.445005] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.445654] ? mtree_range_walk+0x632/0x900 [ 48.446248] ? mas_walk+0x5c7/0x7c0 [ 48.446756] do_vmi_munmap+0x1f1/0x2b0 [ 48.447275] mmap_region+0x1f9/0x2660 [ 48.447790] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.448342] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.449126] ? __pfx_lock_acquire+0x10/0x10 [ 48.449696] ? __pfx_mmap_region+0x10/0x10 [ 48.450264] ? security_mmap_addr+0x7d/0xa0 [ 48.450841] ? get_unmapped_area+0x1f5/0x3f0 [ 48.451432] do_mmap+0x854/0xf00 [ 48.451915] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.452440] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.453031] ksys_mmap_pgoff+0x3af/0x500 [ 48.453570] do_syscall_64+0x3f/0x90 [ 48.454079] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.454784] RIP: 0033:0x7fa3321ddd82 [ 48.455274] 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 [ 48.457563] RSP: 002b:00007ffd05913fc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.458537] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa3321ddd82 [ 48.459435] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa331617000 [ 48.460350] RBP: 00007fa331617000 R08: 0000000000000009 R09: 0000000000001000 [ 48.461263] R10: 0000000000000812 R11: 0000000000000206 R12: 000056197efd5f70 [ 48.462172] R13: 00007ffd05913fe0 R14: 00007ffd05914010 R15: 00007ffd05914370 [ 48.463107] [ 48.463418] [ 48.463646] Allocated by task 213: [ 48.464109] kasan_save_stack+0x22/0x50 [ 48.464653] kasan_set_track+0x25/0x30 [ 48.465184] __kasan_slab_alloc+0x59/0x70 [ 48.465741] kmem_cache_alloc+0x16b/0x370 [ 48.466298] vm_area_dup+0x20/0x160 [ 48.466787] __split_vma+0x170/0x950 [ 48.467284] split_vma+0xc6/0x110 [ 48.467756] mprotect_fixup+0x8d2/0xb30 [ 48.468300] do_mprotect_pkey+0x87e/0xd40 [ 48.468866] __x64_sys_mprotect+0x78/0xc0 [ 48.469417] do_syscall_64+0x3f/0x90 [ 48.469926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.470621] [ 48.470856] Freed by task 19: [ 48.471269] kasan_save_stack+0x22/0x50 [ 48.471806] kasan_set_track+0x25/0x30 [ 48.472335] kasan_save_free_info+0x2b/0x50 [ 48.472905] __kasan_slab_free+0x10a/0x190 [ 48.473474] kmem_cache_free+0x10d/0x4d0 [ 48.474030] rcu_core+0x8c8/0x2860 [ 48.474513] __do_softirq+0x1b7/0x7d4 [ 48.475022] [ 48.475251] Last potentially related work creation: [ 48.475887] kasan_save_stack+0x22/0x50 [ 48.476427] __kasan_record_aux_stack+0x8e/0xa0 [ 48.477041] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.477729] remove_vma+0x139/0x170 [ 48.478211] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.478826] do_vmi_munmap+0x1f1/0x2b0 [ 48.479346] __vm_munmap+0x138/0x3a0 [ 48.479849] __x64_sys_munmap+0x59/0x80 [ 48.480385] do_syscall_64+0x3f/0x90 [ 48.480894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.481581] [ 48.481816] The buggy address belongs to the object at ffff888016489828 [ 48.481816] which belongs to the cache vm_area_struct of size 168 [ 48.483416] The buggy address is located 88 bytes inside of [ 48.483416] freed 168-byte region [ffff888016489828, ffff8880164898d0) [ 48.484947] [ 48.485183] The buggy address belongs to the physical page: [ 48.485901] page:00000000d33f57ad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16489 [ 48.487109] memcg:ffff88800c51ac01 [ 48.487570] flags: 0x100000000000200(slab|node=0|zone=1) [ 48.488273] page_type: 0xffffffff() [ 48.488760] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 48.489779] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c51ac01 [ 48.490778] page dumped because: kasan: bad access detected [ 48.491501] [ 48.491733] Memory state around the buggy address: [ 48.492363] ffff888016489780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 48.493294] ffff888016489800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 48.494221] >ffff888016489880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 48.495170] ^ [ 48.495619] ffff888016489900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.496556] ffff888016489980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 48.497486] ================================================================== [ 48.498580] Disabling lock debugging due to kernel taint [ 51.322867] BUG: Bad rss-counter state mm:0000000095201097 type:MM_FILEPAGES val:33 [ 51.324133] BUG: Bad rss-counter state mm:0000000095201097 type:MM_ANONPAGES val:22 [ 51.752965] BUG: Bad rss-counter state mm:000000007b492013 type:MM_FILEPAGES val:33 [ 51.754136] BUG: Bad rss-counter state mm:000000007b492013 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40539' (ECDSA) to the list of known hosts. 2023/06/20 04:18:25 fuzzer started 2023/06/20 04:18:25 dialing manager at localhost:44161 2023/06/20 04:18:25 checking machine... 2023/06/20 04:18:25 checking revisions... [ 52.482962] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:18:25 testing simple program... [ 52.535268] cgroup: Unknown subsys name 'net' [ 52.605771] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:18:07 Registers: info registers vcpu 0 RAX=ffffffff8180c522 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801026fa01 RSI=ffff88801026faf0 RDI=ffff88801026faf0 RBP=ffff88801026fa18 RSP=ffff88801026f950 R8 =ffffffff860d68fa R9 =ffff88801026fa00 R10=0000000000038001 R11=0000000000010b7e R12=ffff88801026fa20 R13=ffff88801026fa08 R14=ffff88801026faf8 R15=ffff88801026f9c0 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007f0439005900 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=00007f04384952c0 CR3=00000000094f2000 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=e2d5ebc4f711597400000000000ae988 XMM05=ddfb9592c4d648c60000000000135280 XMM06=4fda316b135da52b0000000000134320 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff860ab102 RBX=0000000000000001 RCX=ffffffff811fc523 RDX=0000000000000000 RSI=ffffffff860ab102 RDI=ffffffff85d9f1f8 RBP=ffff88800fd47930 RSP=ffff88800fd47840 R8 =ffffffff860ab102 R9 =ffff88800fd47918 R10=0000000000038001 R11=0000000000009789 R12=ffffffff85d9f1f8 R13=ffffffff85d9f1f8 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcb9 RFL=00000286 [--S--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 00007f32f7a81900 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=00007fff2dd93000 CR3=000000001c980000 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