syzkaller login: [ 34.880949] BUG: Bad rss-counter state mm:00000000765a0fbb type:MM_FILEPAGES val:33 [ 34.882132] BUG: Bad rss-counter state mm:00000000765a0fbb type:MM_ANONPAGES val:22 [ 34.923714] ================================================================== [ 34.924906] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.925999] Read of size 8 at addr ffff88800dd5cb38 by task sshd/220 [ 34.926905] [ 34.927164] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.928208] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.929358] Call Trace: [ 34.929745] [ 34.930084] dump_stack_lvl+0x91/0xf0 [ 34.930658] print_report+0xcc/0x620 [ 34.931226] ? __virt_addr_valid+0x102/0x340 [ 34.931900] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.932638] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.933402] kasan_report+0xbe/0xf0 [ 34.933995] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.934752] vma_interval_tree_remove+0xc75/0xec0 [ 34.935530] vma_prepare+0xc54/0x11a0 [ 34.936107] __split_vma+0x5af/0x950 [ 34.936632] ? __pfx___split_vma+0x10/0x10 [ 34.937163] ? find_held_lock+0x2c/0x110 [ 34.937677] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.938236] ? lock_is_held_type+0x9f/0x120 [ 34.938789] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.939426] ? mtree_range_walk+0x632/0x900 [ 34.939991] ? mas_walk+0x5c7/0x7c0 [ 34.940480] do_vmi_munmap+0x1f1/0x2b0 [ 34.940990] mmap_region+0x1f9/0x2660 [ 34.941496] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.942026] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.942777] ? __pfx_lock_acquire+0x10/0x10 [ 34.943338] ? __pfx_mmap_region+0x10/0x10 [ 34.943890] ? security_mmap_addr+0x7d/0xa0 [ 34.944445] ? get_unmapped_area+0x1f5/0x3f0 [ 34.945015] do_mmap+0x854/0xf00 [ 34.945480] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.945995] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.946584] ksys_mmap_pgoff+0x3af/0x500 [ 34.947114] do_syscall_64+0x3f/0x90 [ 34.947632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.948325] RIP: 0033:0x7f03d54c4d82 [ 34.948786] 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 [ 34.950936] RSP: 002b:00007ffe0139a508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.951865] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f03d54c4d82 [ 34.952726] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f03d48fe000 [ 34.953573] RBP: 00007f03d48fe000 R08: 0000000000000009 R09: 0000000000001000 [ 34.954432] R10: 0000000000000812 R11: 0000000000000206 R12: 000056210a149b20 [ 34.955328] R13: 00007ffe0139a520 R14: 00007ffe0139a550 R15: 00007ffe0139a8b0 [ 34.956212] [ 34.956515] [ 34.956736] Allocated by task 213: [ 34.957199] kasan_save_stack+0x22/0x50 [ 34.957732] kasan_set_track+0x25/0x30 [ 34.958242] __kasan_slab_alloc+0x59/0x70 [ 34.958792] kmem_cache_alloc+0x16b/0x370 [ 34.959337] vm_area_dup+0x20/0x160 [ 34.959813] __split_vma+0x170/0x950 [ 34.960302] split_vma+0xc6/0x110 [ 34.960764] mprotect_fixup+0x8d2/0xb30 [ 34.961286] do_mprotect_pkey+0x87e/0xd40 [ 34.961837] __x64_sys_mprotect+0x78/0xc0 [ 34.962381] do_syscall_64+0x3f/0x90 [ 34.962865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.963554] [ 34.963771] Freed by task 213: [ 34.964162] kasan_save_stack+0x22/0x50 [ 34.964686] kasan_set_track+0x25/0x30 [ 34.965193] kasan_save_free_info+0x2b/0x50 [ 34.965731] __kasan_slab_free+0x10a/0x190 [ 34.966267] kmem_cache_free+0x10d/0x4d0 [ 34.966787] rcu_core+0x8c8/0x2860 [ 34.967235] __do_softirq+0x1b7/0x7d4 [ 34.967737] [ 34.967950] Last potentially related work creation: [ 34.968536] kasan_save_stack+0x22/0x50 [ 34.969046] __kasan_record_aux_stack+0x8e/0xa0 [ 34.969614] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.970259] remove_vma+0x139/0x170 [ 34.970723] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.971276] do_vmi_munmap+0x1f1/0x2b0 [ 34.971779] __vm_munmap+0x138/0x3a0 [ 34.972246] __x64_sys_munmap+0x59/0x80 [ 34.972756] do_syscall_64+0x3f/0x90 [ 34.973242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.973889] [ 34.974103] The buggy address belongs to the object at ffff88800dd5cae0 [ 34.974103] which belongs to the cache vm_area_struct of size 168 [ 34.975633] The buggy address is located 88 bytes inside of [ 34.975633] freed 168-byte region [ffff88800dd5cae0, ffff88800dd5cb88) [ 34.977036] [ 34.977249] The buggy address belongs to the physical page: [ 34.977905] page:00000000866ac21e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd5c [ 34.978991] memcg:ffff88800f1bf001 [ 34.979425] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.980068] page_type: 0xffffffff() [ 34.980524] raw: 0100000000000200 ffff88800879fc80 ffffea00003a1400 dead000000000008 [ 34.981455] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1bf001 [ 34.982408] page dumped because: kasan: bad access detected [ 34.983113] [ 34.983354] Memory state around the buggy address: [ 34.983969] ffff88800dd5ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.984834] ffff88800dd5ca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 34.985688] >ffff88800dd5cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.986542] ^ [ 34.987151] ffff88800dd5cb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.988023] ffff88800dd5cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.988876] ================================================================== [ 34.990369] Disabling lock debugging due to kernel taint [ 36.841746] BUG: Bad rss-counter state mm:00000000a69f1bbc type:MM_FILEPAGES val:33 [ 36.843182] BUG: Bad rss-counter state mm:00000000a69f1bbc type:MM_ANONPAGES val:22 [ 37.348311] BUG: Bad rss-counter state mm:00000000357488ad type:MM_FILEPAGES val:33 [ 37.349393] BUG: Bad rss-counter state mm:00000000357488ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14233' (ECDSA) to the list of known hosts. 2023/06/20 01:12:17 fuzzer started 2023/06/20 01:12:17 dialing manager at localhost:44161 2023/06/20 01:12:17 checking machine... 2023/06/20 01:12:17 checking revisions... [ 38.114331] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:12:18 testing simple program... [ 38.170773] cgroup: Unknown subsys name 'net' [ 38.210371] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:12:11 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=000000006cdb978c RCX=ffff88806c9cbc60 RDX=0000000000000012 RSI=0000000000000003 RDI=000000000e335991 RBP=ffff88800f21e640 RSP=ffff88800ebbf8f0 R8 =000000003c2e684d R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88800ebbf958 R15=0000000000000012 RIP=ffffffff82270f2d 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 00007f1018f62900 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=0000561dd8b90000 CR3=000000000ef80000 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=00000000000000000000000000000000 XMM01=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800e200d00 RCX=0000000000000000 RDX=1ffff1100189f80a RSI=0000000000000003 RDI=ffff88800c4fc050 RBP=ffff88800c4fc000 RSP=ffff888014587ab0 R8 =0000000000000003 R9 =0000000000000000 R10=ffff88800c4fc0ab R11=00000000000b6996 R12=0000000000000003 R13=0000000000000000 R14=ffff88800c4fc058 R15=ffff888014587df0 RIP=ffffffff8186bbb5 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 00007fd7024d5900 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=00007fd7018dd500 CR3=000000000d5f6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b71f0c83679b974500000000000ae988 XMM05=def8808c31408a640000000000135188 XMM06=19e9129bd510f2350000000000134040 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000