[ 23.930114] BUG: Bad rss-counter state mm:000000004b60af70 type:MM_FILEPAGES val:33 [ 23.931640] BUG: Bad rss-counter state mm:000000004b60af70 type:MM_ANONPAGES val:22 [ 24.099761] ================================================================== [ 24.100700] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.101637] Read of size 8 at addr ffff88800c937798 by task sshd/218 [ 24.102498] [ 24.102715] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.103591] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.104578] Call Trace: [ 24.104901] [ 24.105188] dump_stack_lvl+0x91/0xf0 [ 24.105679] print_report+0xcc/0x620 [ 24.106181] ? __virt_addr_valid+0x102/0x340 [ 24.106759] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.107432] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.108090] kasan_report+0xbe/0xf0 [ 24.108589] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.109247] vma_interval_tree_remove+0xc75/0xec0 [ 24.109844] vma_prepare+0xc54/0x11a0 [ 24.110344] __split_vma+0x5af/0x950 [ 24.110847] ? __pfx___split_vma+0x10/0x10 [ 24.111410] ? find_held_lock+0x2c/0x110 [ 24.111958] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.112550] ? lock_is_held_type+0x9f/0x120 [ 24.113118] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.113766] ? mtree_range_walk+0x632/0x900 [ 24.114338] ? mas_walk+0x5c7/0x7c0 [ 24.114812] do_vmi_munmap+0x1f1/0x2b0 [ 24.115310] mmap_region+0x1f9/0x2660 [ 24.115793] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.116301] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.117013] ? __pfx_lock_acquire+0x10/0x10 [ 24.117543] ? __pfx_mmap_region+0x10/0x10 [ 24.118069] ? security_mmap_addr+0x7d/0xa0 [ 24.118628] ? get_unmapped_area+0x1f5/0x3f0 [ 24.119195] do_mmap+0x854/0xf00 [ 24.119656] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.120177] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.120755] ksys_mmap_pgoff+0x3af/0x500 [ 24.121284] do_syscall_64+0x3f/0x90 [ 24.121798] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.122474] RIP: 0033:0x7f404e141d82 [ 24.122958] 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 [ 24.125187] RSP: 002b:00007ffcd7a11678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.126107] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f404e141d82 [ 24.126973] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f404d57b000 [ 24.127886] RBP: 00007f404d57b000 R08: 0000000000000009 R09: 0000000000001000 [ 24.128769] R10: 0000000000000812 R11: 0000000000000206 R12: 00005645d86f9f70 [ 24.129629] R13: 00007ffcd7a11690 R14: 00007ffcd7a116c0 R15: 00007ffcd7a11a20 [ 24.130500] [ 24.130804] [ 24.131048] Allocated by task 211: [ 24.131505] kasan_save_stack+0x22/0x50 [ 24.132033] kasan_set_track+0x25/0x30 [ 24.132528] __kasan_slab_alloc+0x59/0x70 [ 24.133069] kmem_cache_alloc+0x16b/0x370 [ 24.133583] vm_area_dup+0x20/0x160 [ 24.134035] __split_vma+0x170/0x950 [ 24.134508] split_vma+0xc6/0x110 [ 24.134955] mprotect_fixup+0x8d2/0xb30 [ 24.135470] do_mprotect_pkey+0x87e/0xd40 [ 24.136000] __x64_sys_mprotect+0x78/0xc0 [ 24.136525] do_syscall_64+0x3f/0x90 [ 24.137017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.137688] [ 24.137911] Freed by task 211: [ 24.138313] kasan_save_stack+0x22/0x50 [ 24.138828] kasan_set_track+0x25/0x30 [ 24.139362] kasan_save_free_info+0x2b/0x50 [ 24.139916] __kasan_slab_free+0x10a/0x190 [ 24.140460] kmem_cache_free+0x10d/0x4d0 [ 24.140966] rcu_core+0x8c8/0x2860 [ 24.141409] __do_softirq+0x1b7/0x7d4 [ 24.141887] [ 24.142103] Last potentially related work creation: [ 24.142683] kasan_save_stack+0x22/0x50 [ 24.143203] __kasan_record_aux_stack+0x8e/0xa0 [ 24.143775] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.144415] remove_vma+0x139/0x170 [ 24.144863] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.145418] do_vmi_munmap+0x1f1/0x2b0 [ 24.145902] __vm_munmap+0x138/0x3a0 [ 24.146380] __x64_sys_munmap+0x59/0x80 [ 24.146901] do_syscall_64+0x3f/0x90 [ 24.147394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.148051] [ 24.148277] Second to last potentially related work creation: [ 24.148997] kasan_save_stack+0x22/0x50 [ 24.149518] __kasan_record_aux_stack+0x8e/0xa0 [ 24.150109] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.150760] remove_vma+0x139/0x170 [ 24.151223] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.151790] do_vmi_munmap+0x1f1/0x2b0 [ 24.152274] mmap_region+0x1f9/0x2660 [ 24.152749] do_mmap+0x854/0xf00 [ 24.153179] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.153670] ksys_mmap_pgoff+0x3af/0x500 [ 24.154174] do_syscall_64+0x3f/0x90 [ 24.154650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.155330] [ 24.155549] The buggy address belongs to the object at ffff88800c937740 [ 24.155549] which belongs to the cache vm_area_struct of size 168 [ 24.157090] The buggy address is located 88 bytes inside of [ 24.157090] freed 168-byte region [ffff88800c937740, ffff88800c9377e8) [ 24.158554] [ 24.158787] The buggy address belongs to the physical page: [ 24.159487] page:00000000242a5a14 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc937 [ 24.160633] memcg:ffff888013e1f101 [ 24.161090] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.161816] page_type: 0xffffffff() [ 24.162288] raw: 0100000000000200 ffff8880087a0c80 ffffea0000592480 dead000000000003 [ 24.163272] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013e1f101 [ 24.164235] page dumped because: kasan: bad access detected [ 24.164939] [ 24.165164] Memory state around the buggy address: [ 24.165773] ffff88800c937680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.166673] ffff88800c937700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.167586] >ffff88800c937780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.168501] ^ [ 24.169029] ffff88800c937800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 24.169928] ffff88800c937880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 24.170822] ================================================================== [ 24.172008] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.611572] BUG: Bad rss-counter state mm:000000006554ac5e type:MM_FILEPAGES val:33 [ 26.612597] BUG: Bad rss-counter state mm:000000006554ac5e type:MM_ANONPAGES val:22 [ 27.055733] BUG: Bad rss-counter state mm:00000000b418d45c type:MM_FILEPAGES val:33 [ 27.057360] BUG: Bad rss-counter state mm:00000000b418d45c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33845' (ECDSA) to the list of known hosts. 2023/06/21 01:56:24 fuzzer started 2023/06/21 01:56:25 dialing manager at localhost:36067 2023/06/21 01:56:25 checking machine... 2023/06/21 01:56:25 checking revisions... [ 27.817222] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:56:25 testing simple program... [ 27.864533] cgroup: Unknown subsys name 'net' [ 27.902313] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:56:24 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86138e01 RDX=1ffff110028abed4 RSI=ffffffff8180ce89 RDI=ffff88801455f648 RBP=ffff88801455f6a0 RSP=ffff88801455f5d8 R8 =ffffffff86138eb4 R9 =ffff88801455f688 R10=0000000000038001 R11=0000000000020d9c R12=ffff88801455f710 R13=0000000000000000 R14=ffff8880101b9b40 R15=ffff88801455f648 RIP=ffffffff8113062c 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 00007f7fde214900 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=00007f29ca6ea650 CR3=000000000d6be000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0332e394f14723cc00000000000ae988 XMM05=6da2b191821ef5d50000000000133668 XMM06=52ad6cddbd5e4f6c0000000000132098 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffd1c355c88 CR3=0000000015d7c000 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=2034323a36353a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a36353a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000