syzkaller login: [ 39.354574] BUG: Bad rss-counter state mm:00000000463cfaf7 type:MM_FILEPAGES val:33 [ 39.355255] BUG: Bad rss-counter state mm:00000000463cfaf7 type:MM_ANONPAGES val:22 [ 39.396649] ================================================================== [ 39.397244] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.397848] Read of size 8 at addr ffff88800f7ae3f8 by task sshd/220 [ 39.398339] [ 39.399189] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.399722] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.400399] Call Trace: [ 39.400608] [ 39.400796] dump_stack_lvl+0x91/0xf0 [ 39.401122] print_report+0xcc/0x620 [ 39.401441] ? __virt_addr_valid+0x102/0x340 [ 39.401802] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.402201] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.402648] kasan_report+0xbe/0xf0 [ 39.402962] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.403369] vma_interval_tree_remove+0xc75/0xec0 [ 39.403761] vma_prepare+0xc54/0x11a0 [ 39.404077] __split_vma+0x5af/0x950 [ 39.404386] ? __pfx___split_vma+0x10/0x10 [ 39.404734] ? find_held_lock+0x2c/0x110 [ 39.405077] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.405446] ? lock_is_held_type+0x9f/0x120 [ 39.405798] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.406193] ? mtree_range_walk+0x632/0x900 [ 39.406589] ? mas_walk+0x5c7/0x7c0 [ 39.406900] do_vmi_munmap+0x1f1/0x2b0 [ 39.407222] mmap_region+0x1f9/0x2660 [ 39.407539] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.407876] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.408341] ? __pfx_lock_acquire+0x10/0x10 [ 39.408688] ? __pfx_mmap_region+0x10/0x10 [ 39.409032] ? security_mmap_addr+0x7d/0xa0 [ 39.409378] ? get_unmapped_area+0x1f5/0x3f0 [ 39.409737] do_mmap+0x854/0xf00 [ 39.410027] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.410352] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.410754] ksys_mmap_pgoff+0x3af/0x500 [ 39.411089] do_syscall_64+0x3f/0x90 [ 39.411403] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.411826] RIP: 0033:0x7fe618fa3d82 [ 39.412126] 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 [ 39.413479] RSP: 002b:00007ffc9e27aae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.414063] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe618fa3d82 [ 39.414640] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe6183dd000 [ 39.415187] RBP: 00007fe6183dd000 R08: 0000000000000009 R09: 0000000000001000 [ 39.415731] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556921ca9b20 [ 39.416270] R13: 00007ffc9e27ab00 R14: 00007ffc9e27ab30 R15: 00007ffc9e27ae90 [ 39.416823] [ 39.417009] [ 39.417141] Allocated by task 213: [ 39.417407] kasan_save_stack+0x22/0x50 [ 39.417737] kasan_set_track+0x25/0x30 [ 39.418057] __kasan_slab_alloc+0x59/0x70 [ 39.418400] kmem_cache_alloc+0x16b/0x370 [ 39.418782] vm_area_dup+0x20/0x160 [ 39.419082] __split_vma+0x170/0x950 [ 39.419385] split_vma+0xc6/0x110 [ 39.419672] mprotect_fixup+0x8d2/0xb30 [ 39.420002] do_mprotect_pkey+0x87e/0xd40 [ 39.420342] __x64_sys_mprotect+0x78/0xc0 [ 39.420683] do_syscall_64+0x3f/0x90 [ 39.420995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.421414] [ 39.421558] Freed by task 19: [ 39.421811] kasan_save_stack+0x22/0x50 [ 39.422140] kasan_set_track+0x25/0x30 [ 39.422476] kasan_save_free_info+0x2b/0x50 [ 39.422840] __kasan_slab_free+0x10a/0x190 [ 39.423191] kmem_cache_free+0x10d/0x4d0 [ 39.423523] rcu_core+0x8c8/0x2860 [ 39.423814] __do_softirq+0x1b7/0x7d4 [ 39.424127] [ 39.424270] Last potentially related work creation: [ 39.424648] kasan_save_stack+0x22/0x50 [ 39.424980] __kasan_record_aux_stack+0x8e/0xa0 [ 39.425356] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.425773] remove_vma+0x139/0x170 [ 39.426068] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.426431] do_vmi_munmap+0x1f1/0x2b0 [ 39.426791] __vm_munmap+0x138/0x3a0 [ 39.427337] __x64_sys_munmap+0x59/0x80 [ 39.427662] do_syscall_64+0x3f/0x90 [ 39.427968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.428387] [ 39.428532] The buggy address belongs to the object at ffff88800f7ae3a0 [ 39.428532] which belongs to the cache vm_area_struct of size 168 [ 39.429466] The buggy address is located 88 bytes inside of [ 39.429466] freed 168-byte region [ffff88800f7ae3a0, ffff88800f7ae448) [ 39.430360] [ 39.430541] The buggy address belongs to the physical page: [ 39.430974] page:00000000107bf26b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf7ae [ 39.431670] memcg:ffff888017d0ec01 [ 39.431948] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.432367] page_type: 0xffffffff() [ 39.432664] raw: 0100000000000200 ffff88800879fc80 ffffea0000389f40 dead000000000004 [ 39.433252] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017d0ec01 [ 39.433838] page dumped because: kasan: bad access detected [ 39.434263] [ 39.434404] Memory state around the buggy address: [ 39.434803] ffff88800f7ae280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.435342] ffff88800f7ae300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.435888] >ffff88800f7ae380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.436433] ^ [ 39.436971] ffff88800f7ae400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.437520] ffff88800f7ae480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.438065] ================================================================== [ 39.439418] Disabling lock debugging due to kernel taint [ 42.730613] BUG: Bad rss-counter state mm:00000000578b932b type:MM_FILEPAGES val:33 [ 42.731630] BUG: Bad rss-counter state mm:00000000578b932b type:MM_ANONPAGES val:22 [ 44.579727] BUG: Bad rss-counter state mm:0000000043bcafe7 type:MM_FILEPAGES val:33 [ 44.580416] BUG: Bad rss-counter state mm:0000000043bcafe7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8575' (ECDSA) to the list of known hosts. 2023/06/20 08:04:18 fuzzer started 2023/06/20 08:04:18 dialing manager at localhost:44161 2023/06/20 08:04:18 checking machine... 2023/06/20 08:04:18 checking revisions... [ 45.536085] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:04:18 testing simple program... [ 45.588050] cgroup: Unknown subsys name 'net' [ 45.654789] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:04:17 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=1ffff11001f05e75 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88800f82f398 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ef8 RFL=00000206 [-----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 00007f17dfd0b900 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=00007f0cc1955328 CR3=0000000018d98000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffffffba1248c RBX=ffffffff85dfcff0 RCX=ffffffff8180f43a RDX=0000000000000000 RSI=ffffffff86137dcc RDI=ffffffff85dfcfd4 RBP=ffffffff85dfcfd4 RSP=ffff888016aa7400 R8 =ffffffff86137dcc R9 =ffff888016aa74f8 R10=0000000000038001 R11=0000000000020f00 R12=ffffffff85dfd010 R13=ffffffff85dfcfd4 R14=ffffffff85dfcfd4 R15=dffffc0000000000 RIP=ffffffff8112fc93 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 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=00007f17e013b790 CR3=00000000143a8000 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=0000000000000002fffffffe7ffbfeff XMM01=00000000000000008000000000000006 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000