[ 24.728732] BUG: Bad rss-counter state mm:000000000c184117 type:MM_FILEPAGES val:33 [ 24.729395] BUG: Bad rss-counter state mm:000000000c184117 type:MM_ANONPAGES val:22 [ 24.884477] ================================================================== [ 24.885386] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.886333] Read of size 8 at addr ffff888019c57228 by task sshd/218 [ 24.887309] [ 24.887550] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.888429] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.889415] Call Trace: [ 24.889731] [ 24.890013] dump_stack_lvl+0x91/0xf0 [ 24.890499] print_report+0xcc/0x620 [ 24.890982] ? __virt_addr_valid+0x102/0x340 [ 24.891542] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.892150] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.892763] kasan_report+0xbe/0xf0 [ 24.893237] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.893854] vma_interval_tree_remove+0xc75/0xec0 [ 24.894459] vma_prepare+0xc54/0x11a0 [ 24.894934] __split_vma+0x5af/0x950 [ 24.895419] ? __pfx___split_vma+0x10/0x10 [ 24.895951] ? find_held_lock+0x2c/0x110 [ 24.896478] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.897040] ? lock_is_held_type+0x9f/0x120 [ 24.897576] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.898176] ? mtree_range_walk+0x632/0x900 [ 24.898722] ? mas_walk+0x5c7/0x7c0 [ 24.899194] do_vmi_munmap+0x1f1/0x2b0 [ 24.899702] mmap_region+0x1f9/0x2660 [ 24.900184] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.900700] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.901413] ? __pfx_lock_acquire+0x10/0x10 [ 24.901940] ? __pfx_mmap_region+0x10/0x10 [ 24.902470] ? security_mmap_addr+0x7d/0xa0 [ 24.903001] ? get_unmapped_area+0x1f5/0x3f0 [ 24.903556] do_mmap+0x854/0xf00 [ 24.903991] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.904483] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.905044] ksys_mmap_pgoff+0x3af/0x500 [ 24.905547] do_syscall_64+0x3f/0x90 [ 24.906021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.906661] RIP: 0033:0x7f805e3ced82 [ 24.907115] 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 [ 24.909234] RSP: 002b:00007ffc6d90bc38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.910138] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f805e3ced82 [ 24.910988] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f805d808000 [ 24.911846] RBP: 00007f805d808000 R08: 0000000000000009 R09: 0000000000001000 [ 24.912681] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560409a76ec0 [ 24.913516] R13: 00007ffc6d90bc50 R14: 00007ffc6d90bc80 R15: 00007ffc6d90bfe0 [ 24.914368] [ 24.914665] [ 24.914882] Allocated by task 211: [ 24.915308] kasan_save_stack+0x22/0x50 [ 24.915816] kasan_set_track+0x25/0x30 [ 24.916310] __kasan_slab_alloc+0x59/0x70 [ 24.916836] kmem_cache_alloc+0x16b/0x370 [ 24.917348] vm_area_dup+0x20/0x160 [ 24.917798] __split_vma+0x170/0x950 [ 24.918261] split_vma+0xc6/0x110 [ 24.918696] mprotect_fixup+0x8d2/0xb30 [ 24.919194] do_mprotect_pkey+0x87e/0xd40 [ 24.919728] __x64_sys_mprotect+0x78/0xc0 [ 24.920247] do_syscall_64+0x3f/0x90 [ 24.920715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.921352] [ 24.921567] Freed by task 0: [ 24.921945] kasan_save_stack+0x22/0x50 [ 24.922444] kasan_set_track+0x25/0x30 [ 24.922933] kasan_save_free_info+0x2b/0x50 [ 24.923478] __kasan_slab_free+0x10a/0x190 [ 24.924014] kmem_cache_free+0x10d/0x4d0 [ 24.924514] rcu_core+0x8c8/0x2860 [ 24.924952] __do_softirq+0x1b7/0x7d4 [ 24.925424] [ 24.925638] Last potentially related work creation: [ 24.926213] kasan_save_stack+0x22/0x50 [ 24.926711] __kasan_record_aux_stack+0x8e/0xa0 [ 24.927278] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.927930] remove_vma+0x139/0x170 [ 24.928465] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.929020] do_vmi_munmap+0x1f1/0x2b0 [ 24.929507] __vm_munmap+0x138/0x3a0 [ 24.929969] __x64_sys_munmap+0x59/0x80 [ 24.930465] do_syscall_64+0x3f/0x90 [ 24.930933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.931584] [ 24.931798] The buggy address belongs to the object at ffff888019c571d0 [ 24.931798] which belongs to the cache vm_area_struct of size 168 [ 24.933244] The buggy address is located 88 bytes inside of [ 24.933244] freed 168-byte region [ffff888019c571d0, ffff888019c57278) [ 24.934623] [ 24.934838] The buggy address belongs to the physical page: [ 24.935494] page:00000000cfa1f719 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c57 [ 24.936579] memcg:ffff88800f312c01 [ 24.937000] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.937690] page_type: 0xffffffff() [ 24.938156] raw: 0100000000000200 ffff88800879fc80 ffffea00003165c0 dead000000000007 [ 24.939077] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f312c01 [ 24.939998] page dumped because: kasan: bad access detected [ 24.940650] [ 24.940864] Memory state around the buggy address: [ 24.941436] ffff888019c57100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.942282] ffff888019c57180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 24.943126] >ffff888019c57200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.943979] ^ [ 24.944533] ffff888019c57280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 24.945376] ffff888019c57300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 24.946217] ================================================================== [ 24.947163] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.769068] BUG: Bad rss-counter state mm:0000000022278bd7 type:MM_FILEPAGES val:33 [ 26.769999] BUG: Bad rss-counter state mm:0000000022278bd7 type:MM_ANONPAGES val:22 [ 27.321529] BUG: Bad rss-counter state mm:0000000078c73f26 type:MM_FILEPAGES val:33 [ 27.322672] BUG: Bad rss-counter state mm:0000000078c73f26 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2780' (ECDSA) to the list of known hosts. 2023/06/20 03:54:16 fuzzer started 2023/06/20 03:54:16 dialing manager at localhost:44161 2023/06/20 03:54:16 checking machine... 2023/06/20 03:54:16 checking revisions... [ 27.957245] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:54:16 testing simple program... [ 28.000229] cgroup: Unknown subsys name 'net' [ 28.061751] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:54:14 Registers: info registers vcpu 0 RAX=ffffffff81741198 RBX=0000000000000001 RCX=ffffffff86127dd6 RDX=dffffc0000000000 RSI=ffff88801ca87e18 RDI=1ffff11003950e15 RBP=ffff88801ca870a8 RSP=ffff88801ca86fe0 R8 =ffffffff86127dda R9 =ffff88801ca87090 R10=0000000000038001 R11=000000000001e456 R12=ffff88801ca870b0 R13=ffff88801ca87098 R14=ffff88801ca87e20 R15=ffff88801ca87050 RIP=ffffffff81131061 RFL=00000212 [----A--] 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 00007f8f37ec6900 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=00007f8f37e8b008 CR3=00000000099ba000 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=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 info registers vcpu 1 RAX=ffff88800d943788 RBX=dffffc0000000000 RCX=0000000000000000 RDX=1ffff11001b286f1 RSI=ffff88801479a658 RDI=ffff88800eb03070 RBP=ffff88800d15b528 RSP=ffff88806cf09d98 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=0000000000000000 R12=ffff88800eb03068 R13=fffffbfff0f70df0 R14=ffff88800e64c658 R15=ffffffff87b86f80 RIP=ffffffff844cc4d8 RFL=00000002 [-------] 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=00007f0d55cbe390 CR3=0000000015c22000 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=2035313a34353a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a34353a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000