[ 32.907622] BUG: Bad rss-counter state mm:000000008f44c293 type:MM_FILEPAGES val:33 [ 32.909333] BUG: Bad rss-counter state mm:000000008f44c293 type:MM_ANONPAGES val:22 [ 33.072657] ================================================================== [ 33.073591] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.074558] Read of size 8 at addr ffff88800d172ed8 by task sshd/219 [ 33.075343] [ 33.075584] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.076612] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.077622] Call Trace: [ 33.077951] [ 33.078267] dump_stack_lvl+0x91/0xf0 [ 33.078773] print_report+0xcc/0x620 [ 33.079275] ? __virt_addr_valid+0x102/0x340 [ 33.079854] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.080494] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.081133] kasan_report+0xbe/0xf0 [ 33.081631] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.082274] vma_interval_tree_remove+0xc75/0xec0 [ 33.082897] vma_prepare+0xc54/0x11a0 [ 33.083397] __split_vma+0x5af/0x950 [ 33.083887] ? __pfx___split_vma+0x10/0x10 [ 33.084439] ? find_held_lock+0x2c/0x110 [ 33.084979] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.085566] ? lock_is_held_type+0x9f/0x120 [ 33.086115] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.086743] ? mtree_range_walk+0x632/0x900 [ 33.087309] ? mas_walk+0x5c7/0x7c0 [ 33.087822] do_vmi_munmap+0x1f1/0x2b0 [ 33.088340] mmap_region+0x1f9/0x2660 [ 33.088844] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.089367] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.090111] ? __pfx_lock_acquire+0x10/0x10 [ 33.090661] ? __pfx_mmap_region+0x10/0x10 [ 33.091204] ? security_mmap_addr+0x7d/0xa0 [ 33.091766] ? get_unmapped_area+0x1f5/0x3f0 [ 33.092335] do_mmap+0x854/0xf00 [ 33.092785] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.093299] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.093880] ksys_mmap_pgoff+0x3af/0x500 [ 33.094403] do_syscall_64+0x3f/0x90 [ 33.094901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.095592] RIP: 0033:0x7f204dcded82 [ 33.096063] 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 [ 33.098285] RSP: 002b:00007ffdd168e6c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.099228] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f204dcded82 [ 33.100114] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f204d118000 [ 33.100994] RBP: 00007f204d118000 R08: 0000000000000009 R09: 0000000000001000 [ 33.101871] R10: 0000000000000812 R11: 0000000000000206 R12: 00005565da58cec0 [ 33.102756] R13: 00007ffdd168e6e0 R14: 00007ffdd168e710 R15: 00007ffdd168ea70 [ 33.103663] [ 33.103966] [ 33.104188] Allocated by task 212: [ 33.104637] kasan_save_stack+0x22/0x50 [ 33.105160] kasan_set_track+0x25/0x30 [ 33.105670] __kasan_slab_alloc+0x59/0x70 [ 33.106207] kmem_cache_alloc+0x16b/0x370 [ 33.106748] vm_area_dup+0x20/0x160 [ 33.107211] __split_vma+0x170/0x950 [ 33.107710] split_vma+0xc6/0x110 [ 33.108163] mprotect_fixup+0x8d2/0xb30 [ 33.108684] do_mprotect_pkey+0x87e/0xd40 [ 33.109220] __x64_sys_mprotect+0x78/0xc0 [ 33.109759] do_syscall_64+0x3f/0x90 [ 33.110248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.110914] [ 33.111137] Freed by task 212: [ 33.111552] kasan_save_stack+0x22/0x50 [ 33.112076] kasan_set_track+0x25/0x30 [ 33.112587] kasan_save_free_info+0x2b/0x50 [ 33.113139] __kasan_slab_free+0x10a/0x190 [ 33.113693] kmem_cache_free+0x10d/0x4d0 [ 33.114218] rcu_core+0x8c8/0x2860 [ 33.114677] __do_softirq+0x1b7/0x7d4 [ 33.115176] [ 33.115408] Last potentially related work creation: [ 33.116025] kasan_save_stack+0x22/0x50 [ 33.116543] __kasan_record_aux_stack+0x8e/0xa0 [ 33.117140] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.117807] remove_vma+0x139/0x170 [ 33.118270] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.118848] do_vmi_munmap+0x1f1/0x2b0 [ 33.119357] __vm_munmap+0x138/0x3a0 [ 33.119842] __x64_sys_munmap+0x59/0x80 [ 33.120350] do_syscall_64+0x3f/0x90 [ 33.120841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.121506] [ 33.121724] Second to last potentially related work creation: [ 33.122427] kasan_save_stack+0x22/0x50 [ 33.122948] __kasan_record_aux_stack+0x8e/0xa0 [ 33.123550] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.124221] remove_vma+0x139/0x170 [ 33.124686] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.125259] do_vmi_munmap+0x1f1/0x2b0 [ 33.125760] __vm_munmap+0x138/0x3a0 [ 33.126250] __x64_sys_munmap+0x59/0x80 [ 33.126766] do_syscall_64+0x3f/0x90 [ 33.127259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.127944] [ 33.128163] The buggy address belongs to the object at ffff88800d172e80 [ 33.128163] which belongs to the cache vm_area_struct of size 168 [ 33.129686] The buggy address is located 88 bytes inside of [ 33.129686] freed 168-byte region [ffff88800d172e80, ffff88800d172f28) [ 33.131148] [ 33.131375] The buggy address belongs to the physical page: [ 33.132060] page:000000003ca0de50 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd172 [ 33.133194] memcg:ffff88800cacf801 [ 33.133643] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.134311] page_type: 0xffffffff() [ 33.134774] raw: 0100000000000200 ffff88800879fc80 ffffea000038ed40 dead000000000006 [ 33.135744] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cacf801 [ 33.136691] page dumped because: kasan: bad access detected [ 33.137377] [ 33.137599] Memory state around the buggy address: [ 33.138202] ffff88800d172d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.139090] ffff88800d172e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 33.139989] >ffff88800d172e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.140870] ^ [ 33.141626] ffff88800d172f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 33.142519] ffff88800d172f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.143412] ================================================================== [ 33.144406] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.861162] BUG: Bad rss-counter state mm:000000008b863c1a type:MM_FILEPAGES val:33 [ 34.862330] BUG: Bad rss-counter state mm:000000008b863c1a type:MM_ANONPAGES val:22 [ 35.234544] BUG: Bad rss-counter state mm:0000000077b44940 type:MM_FILEPAGES val:33 [ 35.235594] BUG: Bad rss-counter state mm:0000000077b44940 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13527' (ECDSA) to the list of known hosts. 2023/06/19 18:44:36 fuzzer started 2023/06/19 18:44:36 dialing manager at localhost:44161 2023/06/19 18:44:36 checking machine... 2023/06/19 18:44:36 checking revisions... [ 35.885146] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:44:36 testing simple program... [ 35.923297] cgroup: Unknown subsys name 'net' [ 35.966273] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:44:26 Registers: info registers vcpu 0 RAX=ffff888015828001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888015827801 RSI=ffff8880158278b0 RDI=ffff888015827428 RBP=ffff888015827470 RSP=ffff8880158273a0 R8 =0000000000000001 R9 =ffff888015827458 R10=0000000000038001 R11=00000000000234d4 R12=ffff888015827478 R13=ffff888015827460 R14=ffff8880158278b0 R15=ffff888015827418 RIP=ffffffff811304d5 RFL=00000286 [--S--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 00007efc494fc900 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=00007efc488ed4e0 CR3=000000000c56c000 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=df8cc683541747c300000000000ae988 XMM05=f5d478de677e700b0000000000135568 XMM06=806171799158d9670000000000133fe8 XMM07=fb795ef6d65770560000000000123850 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000014 RCX=ffffffff8224702f RDX=ffff888015ba8000 RSI=0000000000000fa0 RDI=0000000000000014 RBP=ffff8880096f7000 RSP=ffff888016def468 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000093f0000093f R12=0000000000000010 R13=0000000000000001 R14=ffff888016e49000 R15=0000000000000fa0 RIP=ffffffff814c02c8 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 00007fcd98a9d900 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=00007fcd99054618 CR3=000000001bc52000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000