syzkaller login: [ 38.890014] BUG: Bad rss-counter state mm:00000000b308fd52 type:MM_FILEPAGES val:33 [ 38.891341] BUG: Bad rss-counter state mm:00000000b308fd52 type:MM_ANONPAGES val:22 [ 39.052105] ================================================================== [ 39.053029] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.053993] Read of size 8 at addr ffff88800de5bc20 by task sshd/220 [ 39.054769] [ 39.055113] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.056002] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.056974] Call Trace: [ 39.057326] [ 39.057614] dump_stack_lvl+0x91/0xf0 [ 39.058108] print_report+0xcc/0x620 [ 39.058601] ? __virt_addr_valid+0x102/0x340 [ 39.059149] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.059781] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.060436] kasan_report+0xbe/0xf0 [ 39.060926] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.061561] vma_interval_tree_remove+0xc75/0xec0 [ 39.062158] vma_prepare+0xc54/0x11a0 [ 39.062644] __split_vma+0x5af/0x950 [ 39.063113] ? __pfx___split_vma+0x10/0x10 [ 39.063651] ? find_held_lock+0x2c/0x110 [ 39.064190] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.064753] ? lock_is_held_type+0x9f/0x120 [ 39.065290] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.065893] ? mtree_range_walk+0x632/0x900 [ 39.066448] ? mas_walk+0x5c7/0x7c0 [ 39.066926] do_vmi_munmap+0x1f1/0x2b0 [ 39.067425] mmap_region+0x1f9/0x2660 [ 39.067907] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.068445] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.069153] ? __pfx_lock_acquire+0x10/0x10 [ 39.069682] ? __pfx_mmap_region+0x10/0x10 [ 39.070208] ? security_mmap_addr+0x7d/0xa0 [ 39.070746] ? get_unmapped_area+0x1f5/0x3f0 [ 39.071295] do_mmap+0x854/0xf00 [ 39.071733] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.072241] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.072815] ksys_mmap_pgoff+0x3af/0x500 [ 39.073323] do_syscall_64+0x3f/0x90 [ 39.073808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.074457] RIP: 0033:0x7feab42d0d82 [ 39.074910] 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 [ 39.077144] RSP: 002b:00007fff59a840a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.078051] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feab42d0d82 [ 39.078902] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feab370a000 [ 39.079749] RBP: 00007feab370a000 R08: 0000000000000009 R09: 0000000000001000 [ 39.080617] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561357335f60 [ 39.081478] R13: 00007fff59a840c0 R14: 00007fff59a840f0 R15: 00007fff59a84450 [ 39.082342] [ 39.082636] [ 39.082848] Allocated by task 213: [ 39.083282] kasan_save_stack+0x22/0x50 [ 39.083788] kasan_set_track+0x25/0x30 [ 39.084289] __kasan_slab_alloc+0x59/0x70 [ 39.084809] kmem_cache_alloc+0x16b/0x370 [ 39.085325] vm_area_dup+0x20/0x160 [ 39.085789] __split_vma+0x170/0x950 [ 39.086248] split_vma+0xc6/0x110 [ 39.086686] mprotect_fixup+0x8d2/0xb30 [ 39.087197] do_mprotect_pkey+0x87e/0xd40 [ 39.087710] __x64_sys_mprotect+0x78/0xc0 [ 39.088244] do_syscall_64+0x3f/0x90 [ 39.088711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.089343] [ 39.089562] Freed by task 213: [ 39.089952] kasan_save_stack+0x22/0x50 [ 39.090450] kasan_set_track+0x25/0x30 [ 39.090940] kasan_save_free_info+0x2b/0x50 [ 39.091470] __kasan_slab_free+0x10a/0x190 [ 39.092005] kmem_cache_free+0x10d/0x4d0 [ 39.092504] rcu_core+0x8c8/0x2860 [ 39.092943] __do_softirq+0x1b7/0x7d4 [ 39.093413] [ 39.093627] Last potentially related work creation: [ 39.094208] kasan_save_stack+0x22/0x50 [ 39.094704] __kasan_record_aux_stack+0x8e/0xa0 [ 39.095299] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.095984] remove_vma+0x139/0x170 [ 39.096453] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.097025] do_vmi_munmap+0x1f1/0x2b0 [ 39.097530] __vm_munmap+0x138/0x3a0 [ 39.098008] __x64_sys_munmap+0x59/0x80 [ 39.098516] do_syscall_64+0x3f/0x90 [ 39.099004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.099673] [ 39.099896] Second to last potentially related work creation: [ 39.100611] kasan_save_stack+0x22/0x50 [ 39.101138] __kasan_record_aux_stack+0x8e/0xa0 [ 39.101738] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.102409] remove_vma+0x139/0x170 [ 39.102879] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.103459] do_vmi_munmap+0x1f1/0x2b0 [ 39.103971] mmap_region+0x1f9/0x2660 [ 39.104463] do_mmap+0x854/0xf00 [ 39.104915] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.105424] ksys_mmap_pgoff+0x3af/0x500 [ 39.105948] do_syscall_64+0x3f/0x90 [ 39.106433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.107095] [ 39.107314] The buggy address belongs to the object at ffff88800de5bbc8 [ 39.107314] which belongs to the cache vm_area_struct of size 168 [ 39.108867] The buggy address is located 88 bytes inside of [ 39.108867] freed 168-byte region [ffff88800de5bbc8, ffff88800de5bc70) [ 39.110324] [ 39.110545] The buggy address belongs to the physical page: [ 39.111233] page:00000000dd7374c5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde5b [ 39.112365] memcg:ffff88800ddbe001 [ 39.112810] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.113551] page_type: 0xffffffff() [ 39.114017] raw: 0100000000000200 ffff88800879fc80 ffffea000026a880 dead000000000003 [ 39.114973] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddbe001 [ 39.115911] page dumped because: kasan: bad access detected [ 39.116613] [ 39.116833] Memory state around the buggy address: [ 39.117431] ffff88800de5bb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.118311] ffff88800de5bb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.119217] >ffff88800de5bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.120116] ^ [ 39.120645] ffff88800de5bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.121500] ffff88800de5bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.122339] ================================================================== [ 39.123305] Disabling lock debugging due to kernel taint [ 41.214623] BUG: Bad rss-counter state mm:0000000086ba5bb6 type:MM_FILEPAGES val:33 [ 41.215785] BUG: Bad rss-counter state mm:0000000086ba5bb6 type:MM_ANONPAGES val:22 [ 41.793775] BUG: Bad rss-counter state mm:00000000521ba779 type:MM_FILEPAGES val:33 [ 41.794964] BUG: Bad rss-counter state mm:00000000521ba779 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62572' (ECDSA) to the list of known hosts. 2023/06/20 05:01:08 fuzzer started 2023/06/20 05:01:08 dialing manager at localhost:44161 2023/06/20 05:01:09 checking machine... 2023/06/20 05:01:09 checking revisions... [ 42.459599] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:01:09 testing simple program... [ 42.503131] cgroup: Unknown subsys name 'net' [ 42.569928] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:01:08 Registers: info registers vcpu 0 RAX=ffffffff86088c1f RBX=0000000000000002 RCX=ffffffff86088c1a RDX=dffffc0000000000 RSI=ffffffff86088c1e RDI=ffffffff86088c1f RBP=ffff88806ce09af0 RSP=ffff88806ce099d8 R8 =ffffffff86088c1e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130a98 RFL=00000202 [-------] 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 00007f14f15b4900 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=00007f14f09c2b40 CR3=000000000d5d8000 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=038557b0ed4c3eac00000000000ae988 XMM05=41e0dd5b4aaa091500000000001368c8 XMM06=24104f2563e243890000000000135668 XMM07=fb795ef6d65770560000000000124238 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff81260611 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff888008d87c38 RSP=ffff888008d87a70 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000003 R12=0000000000000001 R13=ffff888008d71b40 R14=ffff888008d87c98 R15=0000000000000009 RIP=ffffffff8135b8e0 RFL=00000047 [---Z-PC] 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=00007ffd3968e000 CR3=000000000ed3a000 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