syzkaller login: [ 39.944191] BUG: Bad rss-counter state mm:00000000f6febf37 type:MM_FILEPAGES val:33 [ 39.945193] BUG: Bad rss-counter state mm:00000000f6febf37 type:MM_ANONPAGES val:22 [ 40.113692] ================================================================== [ 40.114754] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.115989] Read of size 8 at addr ffff88801ab53310 by task sshd/221 [ 40.116789] [ 40.117003] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.117873] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.118864] Call Trace: [ 40.119183] <TASK> [ 40.119477] dump_stack_lvl+0x91/0xf0 [ 40.119972] print_report+0xcc/0x620 [ 40.120457] ? __virt_addr_valid+0x102/0x340 [ 40.121011] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.121650] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.122290] kasan_report+0xbe/0xf0 [ 40.122766] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.123401] vma_interval_tree_remove+0xc75/0xec0 [ 40.124014] vma_prepare+0xc54/0x11a0 [ 40.124511] __split_vma+0x5af/0x950 [ 40.125010] ? __pfx___split_vma+0x10/0x10 [ 40.125546] ? find_held_lock+0x2c/0x110 [ 40.126071] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.126645] ? lock_is_held_type+0x9f/0x120 [ 40.127187] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.127828] ? mtree_range_walk+0x632/0x900 [ 40.128392] ? mas_walk+0x5c7/0x7c0 [ 40.128863] do_vmi_munmap+0x1f1/0x2b0 [ 40.129367] mmap_region+0x1f9/0x2660 [ 40.129855] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.130369] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.131078] ? __pfx_lock_acquire+0x10/0x10 [ 40.131618] ? __pfx_mmap_region+0x10/0x10 [ 40.132143] ? security_mmap_addr+0x7d/0xa0 [ 40.132678] ? get_unmapped_area+0x1f5/0x3f0 [ 40.133233] do_mmap+0x854/0xf00 [ 40.133710] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.134211] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.134774] ksys_mmap_pgoff+0x3af/0x500 [ 40.135304] do_syscall_64+0x3f/0x90 [ 40.135796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.136450] RIP: 0033:0x7f364b92fd82 [ 40.136905] 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 [ 40.139025] RSP: 002b:00007ffdb5edba98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.139933] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f364b92fd82 [ 40.140779] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f364ad69000 [ 40.141624] RBP: 00007f364ad69000 R08: 0000000000000009 R09: 0000000000001000 [ 40.142478] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557727592d90 [ 40.143334] R13: 00007ffdb5edbab0 R14: 00007ffdb5edbae0 R15: 00007ffdb5edbe40 [ 40.144198] </TASK> [ 40.144490] [ 40.144707] Allocated by task 214: [ 40.145134] kasan_save_stack+0x22/0x50 [ 40.145635] kasan_set_track+0x25/0x30 [ 40.146130] __kasan_slab_alloc+0x59/0x70 [ 40.146651] kmem_cache_alloc+0x16b/0x370 [ 40.147166] vm_area_dup+0x20/0x160 [ 40.147642] __split_vma+0x170/0x950 [ 40.148104] split_vma+0xc6/0x110 [ 40.148570] mprotect_fixup+0x8d2/0xb30 [ 40.149080] do_mprotect_pkey+0x87e/0xd40 [ 40.149601] __x64_sys_mprotect+0x78/0xc0 [ 40.150120] do_syscall_64+0x3f/0x90 [ 40.150592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.151230] [ 40.151458] Freed by task 204: [ 40.151852] kasan_save_stack+0x22/0x50 [ 40.152351] kasan_set_track+0x25/0x30 [ 40.152846] kasan_save_free_info+0x2b/0x50 [ 40.153374] __kasan_slab_free+0x10a/0x190 [ 40.153905] kmem_cache_free+0x10d/0x4d0 [ 40.154412] rcu_core+0x8c8/0x2860 [ 40.154853] __do_softirq+0x1b7/0x7d4 [ 40.155329] [ 40.155564] Last potentially related work creation: [ 40.156152] kasan_save_stack+0x22/0x50 [ 40.156703] __kasan_record_aux_stack+0x8e/0xa0 [ 40.157278] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.157918] remove_vma+0x139/0x170 [ 40.158374] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.158931] do_vmi_munmap+0x1f1/0x2b0 [ 40.159423] __vm_munmap+0x138/0x3a0 [ 40.159890] __x64_sys_munmap+0x59/0x80 [ 40.160391] do_syscall_64+0x3f/0x90 [ 40.160860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.161507] [ 40.161723] The buggy address belongs to the object at ffff88801ab532b8 [ 40.161723] which belongs to the cache vm_area_struct of size 168 [ 40.163188] The buggy address is located 88 bytes inside of [ 40.163188] freed 168-byte region [ffff88801ab532b8, ffff88801ab53360) [ 40.164604] [ 40.164819] The buggy address belongs to the physical page: [ 40.165480] page:0000000011f7b3f1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ab53 [ 40.166599] memcg:ffff88800de99d01 [ 40.167026] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.167698] page_type: 0xffffffff() [ 40.168159] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.169089] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de99d01 [ 40.170014] page dumped because: kasan: bad access detected [ 40.170690] [ 40.170913] Memory state around the buggy address: [ 40.171505] ffff88801ab53200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 40.172358] ffff88801ab53280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 40.173211] >ffff88801ab53300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 40.174082] ^ [ 40.174563] ffff88801ab53380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 40.175445] ffff88801ab53400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 40.176306] ================================================================== [ 40.177357] Disabling lock debugging due to kernel taint [ 42.170658] BUG: Bad rss-counter state mm:0000000010633f4d type:MM_FILEPAGES val:33 [ 42.171847] BUG: Bad rss-counter state mm:0000000010633f4d type:MM_ANONPAGES val:22 [ 42.579480] BUG: Bad rss-counter state mm:00000000cc51c9d6 type:MM_FILEPAGES val:33 [ 42.580547] BUG: Bad rss-counter state mm:00000000cc51c9d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48544' (ECDSA) to the list of known hosts. 2023/06/19 14:16:04 fuzzer started 2023/06/19 14:16:04 dialing manager at localhost:44161 2023/06/19 14:16:04 checking machine... 2023/06/19 14:16:04 checking revisions... [ 43.319909] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:16:05 testing simple program... [ 43.366950] cgroup: Unknown subsys name 'net' [ 43.453093] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:15:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110011aff3b RSI=ffffffff8118d7d9 RDI=ffff888008d7f978 RBP=ffff888008d7f9d0 RSP=ffff888008d7f908 R8 =0000000000000001 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=ffff888008d70000 R15=ffff888008d7f978 RIP=ffffffff81130682 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 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=00007f96e72c70d0 CR3=0000000019ce2000 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=2034303a36313a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a36313a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b38 RCX=0000000000000001 RDX=1ffff1100d9e1381 RSI=ffffffff811fc87d RDI=ffff88806cf09b44 RBP=ffff88806cf09c08 RSP=ffff88806cf09a50 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000000979d R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff8880175f0000 R15=ffff88801756dc38 RIP=ffffffff813ad4f9 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 00007f424ee05900 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=00007f424ede4020 CR3=000000000ed30000 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=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000