syzkaller login: [ 42.077648] BUG: Bad rss-counter state mm:00000000e3e43ad7 type:MM_FILEPAGES val:33 [ 42.078901] BUG: Bad rss-counter state mm:00000000e3e43ad7 type:MM_ANONPAGES val:22 [ 42.232598] ================================================================== [ 42.233524] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.234467] Read of size 8 at addr ffff888016514058 by task sshd/220 [ 42.235239] [ 42.235569] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.236439] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.237429] Call Trace: [ 42.237778] [ 42.238070] dump_stack_lvl+0x91/0xf0 [ 42.238570] print_report+0xcc/0x620 [ 42.239052] ? __virt_addr_valid+0x102/0x340 [ 42.239605] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.240225] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.240849] kasan_report+0xbe/0xf0 [ 42.241334] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.241976] vma_interval_tree_remove+0xc75/0xec0 [ 42.242594] vma_prepare+0xc54/0x11a0 [ 42.243075] __split_vma+0x5af/0x950 [ 42.243555] ? __pfx___split_vma+0x10/0x10 [ 42.244099] ? find_held_lock+0x2c/0x110 [ 42.244640] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.245201] ? lock_is_held_type+0x9f/0x120 [ 42.245758] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.246380] ? mtree_range_walk+0x632/0x900 [ 42.246941] ? mas_walk+0x5c7/0x7c0 [ 42.247425] do_vmi_munmap+0x1f1/0x2b0 [ 42.247926] mmap_region+0x1f9/0x2660 [ 42.248414] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.248930] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.249690] ? __pfx_lock_acquire+0x10/0x10 [ 42.250232] ? __pfx_mmap_region+0x10/0x10 [ 42.250766] ? security_mmap_addr+0x7d/0xa0 [ 42.251306] ? get_unmapped_area+0x1f5/0x3f0 [ 42.251861] do_mmap+0x854/0xf00 [ 42.252306] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.252810] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.253380] ksys_mmap_pgoff+0x3af/0x500 [ 42.253906] do_syscall_64+0x3f/0x90 [ 42.254395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.255053] RIP: 0033:0x7f7000cc6d82 [ 42.255521] 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 [ 42.257680] RSP: 002b:00007ffcf8a21588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.258602] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7000cc6d82 [ 42.259475] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7000100000 [ 42.260331] RBP: 00007f7000100000 R08: 0000000000000009 R09: 0000000000001000 [ 42.261204] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b909ccec0 [ 42.262085] R13: 00007ffcf8a215a0 R14: 00007ffcf8a215d0 R15: 00007ffcf8a21930 [ 42.262947] [ 42.263246] [ 42.263467] Allocated by task 213: [ 42.263908] kasan_save_stack+0x22/0x50 [ 42.264415] kasan_set_track+0x25/0x30 [ 42.264909] __kasan_slab_alloc+0x59/0x70 [ 42.265436] kmem_cache_alloc+0x16b/0x370 [ 42.265971] vm_area_dup+0x20/0x160 [ 42.266431] __split_vma+0x170/0x950 [ 42.266904] split_vma+0xc6/0x110 [ 42.267355] mprotect_fixup+0x8d2/0xb30 [ 42.267864] do_mprotect_pkey+0x87e/0xd40 [ 42.268396] __x64_sys_mprotect+0x78/0xc0 [ 42.268928] do_syscall_64+0x3f/0x90 [ 42.269412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.270088] [ 42.270322] Freed by task 213: [ 42.270722] kasan_save_stack+0x22/0x50 [ 42.271227] kasan_set_track+0x25/0x30 [ 42.271731] kasan_save_free_info+0x2b/0x50 [ 42.272271] __kasan_slab_free+0x10a/0x190 [ 42.272818] kmem_cache_free+0x10d/0x4d0 [ 42.273333] rcu_core+0x8c8/0x2860 [ 42.273786] __do_softirq+0x1b7/0x7d4 [ 42.274264] [ 42.274483] Last potentially related work creation: [ 42.275081] kasan_save_stack+0x22/0x50 [ 42.275599] __kasan_record_aux_stack+0x8e/0xa0 [ 42.276185] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.276841] remove_vma+0x139/0x170 [ 42.277298] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.277876] do_vmi_munmap+0x1f1/0x2b0 [ 42.278368] __vm_munmap+0x138/0x3a0 [ 42.278840] __x64_sys_munmap+0x59/0x80 [ 42.279349] do_syscall_64+0x3f/0x90 [ 42.279828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.280474] [ 42.280689] The buggy address belongs to the object at ffff888016514000 [ 42.280689] which belongs to the cache vm_area_struct of size 168 [ 42.282213] The buggy address is located 88 bytes inside of [ 42.282213] freed 168-byte region [ffff888016514000, ffff8880165140a8) [ 42.283631] [ 42.283848] The buggy address belongs to the physical page: [ 42.284522] page:000000000550334b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16514 [ 42.285634] memcg:ffff888015dbfc01 [ 42.286069] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.286715] page_type: 0xffffffff() [ 42.287165] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.288091] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015dbfc01 [ 42.289014] page dumped because: kasan: bad access detected [ 42.289701] [ 42.289916] Memory state around the buggy address: [ 42.290513] ffff888016513f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 42.291377] ffff888016513f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 42.292233] >ffff888016514000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.293081] ^ [ 42.293823] ffff888016514080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 42.294690] ffff888016514100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.295549] ================================================================== [ 42.296546] Disabling lock debugging due to kernel taint [ 44.155893] BUG: Bad rss-counter state mm:00000000572bf4d6 type:MM_FILEPAGES val:33 [ 44.156641] BUG: Bad rss-counter state mm:00000000572bf4d6 type:MM_ANONPAGES val:22 [ 44.601305] BUG: Bad rss-counter state mm:00000000725f4420 type:MM_FILEPAGES val:33 [ 44.602486] BUG: Bad rss-counter state mm:00000000725f4420 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10681' (ECDSA) to the list of known hosts. 2023/06/20 07:18:03 fuzzer started 2023/06/20 07:18:04 dialing manager at localhost:44161 2023/06/20 07:18:04 checking machine... 2023/06/20 07:18:04 checking revisions... [ 45.298991] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:18:04 testing simple program... [ 45.342802] cgroup: Unknown subsys name 'net' [ 45.381978] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:17:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c1354 RSI=ffff88801472f660 RDI=ffff88806ce09aa0 RBP=ffff88801472f660 RSP=ffff88806ce099f0 R8 =ffffffff860bffe6 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000cf52 R12=0000000000000008 R13=ffff88806ce09ae0 R14=ffff88801472f668 R15=ffff88806ce09a98 RIP=ffffffff81130445 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 00007fdaa4628900 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=00007fdaa3b48000 CR3=000000000d5e2000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=8f13b48599600f6600000000000ae988 XMM05=fc8067dcd88339ae0000000000134e50 XMM06=4fda316b135da52b0000000000133c40 XMM07=fb795ef6d657705600000000001241e8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000006 RCX=ffffffff81493a77 RDX=ffff88800f910000 RSI=00000000000003f5 RDI=0000000000000003 RBP=ffffffff848a4c80 RSP=ffff88800c5bf858 R8 =0000000000000003 R9 =00000000000003f4 R10=0000000000000452 R11=0000000000000001 R12=0000000000000452 R13=0000000000000003 R14=0000000000000011 R15=0000000000000452 RIP=ffffffff814c0420 RFL=00000212 [----A--] 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 00007f3a3712f900 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=00007fff939fa000 CR3=000000000cee2000 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