syzkaller login: [ 130.085645] BUG: Bad rss-counter state mm:000000003d49493f type:MM_FILEPAGES val:33 [ 130.086846] BUG: Bad rss-counter state mm:000000003d49493f type:MM_ANONPAGES val:22 [ 130.128924] ================================================================== [ 130.129822] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 130.130800] Read of size 8 at addr ffff88800f0066b0 by task sshd/219 [ 130.131590] [ 130.131813] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 130.132849] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 130.133835] Call Trace: [ 130.134164] [ 130.134460] dump_stack_lvl+0x91/0xf0 [ 130.134958] print_report+0xcc/0x620 [ 130.135455] ? __virt_addr_valid+0x102/0x340 [ 130.136023] ? vma_interval_tree_remove+0xc75/0xec0 [ 130.136657] ? vma_interval_tree_remove+0xc75/0xec0 [ 130.137289] kasan_report+0xbe/0xf0 [ 130.137791] ? vma_interval_tree_remove+0xc75/0xec0 [ 130.138441] vma_interval_tree_remove+0xc75/0xec0 [ 130.139063] vma_prepare+0xc54/0x11a0 [ 130.139561] __split_vma+0x5af/0x950 [ 130.140047] ? __pfx___split_vma+0x10/0x10 [ 130.140593] ? find_held_lock+0x2c/0x110 [ 130.141132] do_vmi_align_munmap+0x2ba/0x11f0 [ 130.141714] ? lock_is_held_type+0x9f/0x120 [ 130.142245] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 130.142861] ? mtree_range_walk+0x632/0x900 [ 130.143403] ? mas_walk+0x5c7/0x7c0 [ 130.143874] do_vmi_munmap+0x1f1/0x2b0 [ 130.144363] mmap_region+0x1f9/0x2660 [ 130.144853] ? vm_mmap_pgoff+0x15c/0x3a0 [ 130.145391] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 130.146114] ? __pfx_lock_acquire+0x10/0x10 [ 130.146658] ? __pfx_mmap_region+0x10/0x10 [ 130.147183] ? security_mmap_addr+0x7d/0xa0 [ 130.147715] ? get_unmapped_area+0x1f5/0x3f0 [ 130.148262] do_mmap+0x854/0xf00 [ 130.148728] vm_mmap_pgoff+0x1a6/0x3a0 [ 130.149242] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 130.149811] ksys_mmap_pgoff+0x3af/0x500 [ 130.150317] do_syscall_64+0x3f/0x90 [ 130.150816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 130.151467] RIP: 0033:0x7fd713e40d82 [ 130.151924] 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 [ 130.154020] RSP: 002b:00007ffcc4641e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 130.154925] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd713e40d82 [ 130.155822] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd71327a000 [ 130.156673] RBP: 00007fd71327a000 R08: 0000000000000009 R09: 0000000000001000 [ 130.157545] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559eaf03ef70 [ 130.158439] R13: 00007ffcc4641e50 R14: 00007ffcc4641e80 R15: 00007ffcc46421e0 [ 130.159316] [ 130.159608] [ 130.159821] Allocated by task 212: [ 130.160247] kasan_save_stack+0x22/0x50 [ 130.160748] kasan_set_track+0x25/0x30 [ 130.161255] __kasan_slab_alloc+0x59/0x70 [ 130.161806] kmem_cache_alloc+0x16b/0x370 [ 130.162342] vm_area_dup+0x20/0x160 [ 130.162837] __split_vma+0x170/0x950 [ 130.163316] split_vma+0xc6/0x110 [ 130.163775] mprotect_fixup+0x8d2/0xb30 [ 130.164299] do_mprotect_pkey+0x87e/0xd40 [ 130.164837] __x64_sys_mprotect+0x78/0xc0 [ 130.165351] do_syscall_64+0x3f/0x90 [ 130.165825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 130.166474] [ 130.166706] Freed by task 212: [ 130.167101] kasan_save_stack+0x22/0x50 [ 130.167598] kasan_set_track+0x25/0x30 [ 130.168092] kasan_save_free_info+0x2b/0x50 [ 130.168635] __kasan_slab_free+0x10a/0x190 [ 130.169168] kmem_cache_free+0x10d/0x4d0 [ 130.169686] rcu_core+0x8c8/0x2860 [ 130.170140] __do_softirq+0x1b7/0x7d4 [ 130.170656] [ 130.170876] Last potentially related work creation: [ 130.171489] kasan_save_stack+0x22/0x50 [ 130.172003] __kasan_record_aux_stack+0x8e/0xa0 [ 130.172572] __call_rcu_common.constprop.0+0x6a/0xb90 [ 130.173217] remove_vma+0x139/0x170 [ 130.173671] do_vmi_align_munmap+0xd4a/0x11f0 [ 130.174230] do_vmi_munmap+0x1f1/0x2b0 [ 130.174736] __vm_munmap+0x138/0x3a0 [ 130.175206] __x64_sys_munmap+0x59/0x80 [ 130.175706] do_syscall_64+0x3f/0x90 [ 130.176187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 130.176863] [ 130.177084] The buggy address belongs to the object at ffff88800f006658 [ 130.177084] which belongs to the cache vm_area_struct of size 168 [ 130.178605] The buggy address is located 88 bytes inside of [ 130.178605] freed 168-byte region [ffff88800f006658, ffff88800f006700) [ 130.180030] [ 130.180246] The buggy address belongs to the physical page: [ 130.180913] page:00000000f2c67ca0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf006 [ 130.182000] memcg:ffff8880182ca201 [ 130.182444] flags: 0x100000000000200(slab|node=0|zone=1) [ 130.183090] page_type: 0xffffffff() [ 130.183545] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 130.184468] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880182ca201 [ 130.185387] page dumped because: kasan: bad access detected [ 130.186049] [ 130.186267] Memory state around the buggy address: [ 130.186859] ffff88800f006580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 130.187712] ffff88800f006600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 130.188573] >ffff88800f006680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 130.189425] ^ [ 130.190012] ffff88800f006700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 130.190870] ffff88800f006780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 130.191718] ================================================================== [ 130.192973] Disabling lock debugging due to kernel taint [ 132.141832] BUG: Bad rss-counter state mm:000000008f6ae5bb type:MM_FILEPAGES val:33 [ 132.142854] BUG: Bad rss-counter state mm:000000008f6ae5bb type:MM_ANONPAGES val:22 [ 132.738784] BUG: Bad rss-counter state mm:0000000047560ae1 type:MM_FILEPAGES val:33 [ 132.739979] BUG: Bad rss-counter state mm:0000000047560ae1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40634' (ECDSA) to the list of known hosts. 2023/06/19 19:27:35 fuzzer started 2023/06/19 19:27:35 dialing manager at localhost:44161 2023/06/19 19:27:35 checking machine... 2023/06/19 19:27:35 checking revisions... [ 133.278229] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:27:35 testing simple program... [ 133.332240] cgroup: Unknown subsys name 'net' [ 133.392150] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:25:56 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 0000000000000000 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=00007ffcbdeefbe8 CR3=000000000c690000 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=2035333a37323a3931203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a37323a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000081 RCX=0000000000000000 RDX=ffff888013fe0000 RSI=0000000000000081 RDI=ffff88800c1f0c98 RBP=ffff88800c1f0c98 RSP=ffff888013fdf480 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00676f6c7379732f R12=0000000000000001 R13=dffffc0000000000 R14=1ffff110027fbe93 R15=ffff88800c1f0c9a RIP=ffffffff814c07eb 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 00007f3610d36900 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=00007f3616253650 CR3=0000000009d42000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=d284560f6de7bf2000000000000ae988 XMM05=2edd82a4d91c22a70000000000140c90 XMM06=dfcdbad4f1609c37000000000013fb48 XMM07=fb795ef6d65770560000000000130188 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000