Debian GNU/Li[ 30.854516] BUG: Bad rss-counter state mm:0000000063b512d7 type:MM_FILEPAGES val:33 nux 11 syzkaller[ 30.855409] BUG: Bad rss-counter state mm:0000000063b512d7 type:MM_ANONPAGES val:22 ttyS0 syzkaller login: [ 30.988770] ================================================================== [ 30.990361] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.992147] Read of size 8 at addr ffff88800e82a6b0 by task sshd/220 [ 30.993671] [ 30.994045] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.995756] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.997718] Call Trace: [ 30.998365] [ 30.998897] dump_stack_lvl+0x91/0xf0 [ 30.999805] print_report+0xcc/0x620 [ 31.000635] ? __virt_addr_valid+0x102/0x340 [ 31.001675] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.002833] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.004046] kasan_report+0xbe/0xf0 [ 31.004895] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.006042] vma_interval_tree_remove+0xc75/0xec0 [ 31.007390] vma_prepare+0xc54/0x11a0 [ 31.008256] __split_vma+0x5af/0x950 [ 31.009139] ? __pfx___split_vma+0x10/0x10 [ 31.010137] ? find_held_lock+0x2c/0x110 [ 31.011178] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.012281] ? lock_is_held_type+0x9f/0x120 [ 31.013291] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.014497] ? mtree_range_walk+0x632/0x900 [ 31.015524] ? mas_walk+0x5c7/0x7c0 [ 31.016434] do_vmi_munmap+0x1f1/0x2b0 [ 31.017382] mmap_region+0x1f9/0x2660 [ 31.018251] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.023251] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.024632] ? __pfx_lock_acquire+0x10/0x10 [ 31.025698] ? __pfx_mmap_region+0x10/0x10 [ 31.026847] ? security_mmap_addr+0x7d/0xa0 [ 31.027919] ? get_unmapped_area+0x1f5/0x3f0 [ 31.028975] do_mmap+0x854/0xf00 [ 31.029797] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.030786] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.031851] ksys_mmap_pgoff+0x3af/0x500 [ 31.032857] do_syscall_64+0x3f/0x90 [ 31.033763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.034974] RIP: 0033:0x7f3bd4165d82 [ 31.035864] 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 [ 31.040343] RSP: 002b:00007ffd6de5afe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.042160] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3bd4165d82 [ 31.043962] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3bd359f000 [ 31.045585] RBP: 00007f3bd359f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.047169] R10: 0000000000000812 R11: 0000000000000206 R12: 00005596e7c6dec0 [ 31.052158] R13: 00007ffd6de5b000 R14: 00007ffd6de5b030 R15: 00007ffd6de5b390 [ 31.053833] [ 31.054410] [ 31.054812] Allocated by task 213: [ 31.055632] kasan_save_stack+0x22/0x50 [ 31.056615] kasan_set_track+0x25/0x30 [ 31.057553] __kasan_slab_alloc+0x59/0x70 [ 31.058586] kmem_cache_alloc+0x16b/0x370 [ 31.059587] vm_area_dup+0x20/0x160 [ 31.060429] __split_vma+0x170/0x950 [ 31.061350] split_vma+0xc6/0x110 [ 31.062195] mprotect_fixup+0x8d2/0xb30 [ 31.063149] do_mprotect_pkey+0x87e/0xd40 [ 31.064169] __x64_sys_mprotect+0x78/0xc0 [ 31.065150] do_syscall_64+0x3f/0x90 [ 31.066032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.067341] [ 31.067713] Freed by task 213: [ 31.068485] kasan_save_stack+0x22/0x50 [ 31.069423] kasan_set_track+0x25/0x30 [ 31.070315] kasan_save_free_info+0x2b/0x50 [ 31.071348] __kasan_slab_free+0x10a/0x190 [ 31.072346] kmem_cache_free+0x10d/0x4d0 [ 31.073271] rcu_core+0x8c8/0x2860 [ 31.074029] __do_softirq+0x1b7/0x7d4 [ 31.074908] [ 31.075278] Last potentially related work creation: [ 31.076395] kasan_save_stack+0x22/0x50 [ 31.077297] __kasan_record_aux_stack+0x8e/0xa0 [ 31.078310] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.079498] remove_vma+0x139/0x170 [ 31.080322] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.081376] do_vmi_munmap+0x1f1/0x2b0 [ 31.082254] __vm_munmap+0x138/0x3a0 [ 31.083091] __x64_sys_munmap+0x59/0x80 [ 31.084052] do_syscall_64+0x3f/0x90 [ 31.084972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.086177] [ 31.086569] Second to last potentially related work creation: [ 31.087975] kasan_save_stack+0x22/0x50 [ 31.088930] __kasan_record_aux_stack+0x8e/0xa0 [ 31.090032] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.091228] remove_vma+0x139/0x170 [ 31.092059] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.093151] do_vmi_munmap+0x1f1/0x2b0 [ 31.093985] mmap_region+0x1f9/0x2660 [ 31.094879] do_mmap+0x854/0xf00 [ 31.095698] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.096609] ksys_mmap_pgoff+0x3af/0x500 [ 31.097565] do_syscall_64+0x3f/0x90 [ 31.098475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.099661] [ 31.100050] The buggy address belongs to the object at ffff88800e82a658 [ 31.100050] which belongs to the cache vm_area_struct of size 168 [ 31.103115] The buggy address is located 88 bytes inside of [ 31.103115] freed 168-byte region [ffff88800e82a658, ffff88800e82a700) [ 31.105930] [ 31.106321] The buggy address belongs to the physical page: [ 31.107683] page:00000000a6590f6c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe82a [ 31.109856] memcg:ffff888016877301 [ 31.110714] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.112078] page_type: 0xffffffff() [ 31.112909] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b0200 000000000000000b [ 31.114777] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016877301 [ 31.116797] page dumped because: kasan: bad access detected [ 31.117939] [ 31.118332] Memory state around the buggy address: [ 31.119440] ffff88800e82a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.121128] ffff88800e82a600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.122913] >ffff88800e82a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.124676] ^ [ 31.125837] ffff88800e82a700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.127596] ffff88800e82a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.129353] ================================================================== [ 31.131295] Disabling lock debugging due to kernel taint [ 35.896163] BUG: Bad rss-counter state mm:000000000fd43969 type:MM_FILEPAGES val:33 [ 35.896798] BUG: Bad rss-counter state mm:000000000fd43969 type:MM_ANONPAGES val:22 [ 36.515215] BUG: Bad rss-counter state mm:00000000a36ad3e3 type:MM_FILEPAGES val:33 [ 36.515842] BUG: Bad rss-counter state mm:00000000a36ad3e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22620' (ECDSA) to the list of known hosts. 2023/06/21 10:01:12 fuzzer started 2023/06/21 10:01:12 dialing manager at localhost:36067 2023/06/21 10:01:12 checking machine... 2023/06/21 10:01:12 checking revisions... [ 37.235988] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:01:13 testing simple program... [ 37.291047] cgroup: Unknown subsys name 'net' [ 37.361659] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:01:12 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fb40fdc93c0 CR3=000000000c964000 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=2032313a31303a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a31303a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff81746388 RCX=0000000000000001 RDX=1ffff11003073f16 RSI=ffff88801839fc38 RDI=ffffffff81746388 RBP=ffffffff81746388 RSP=ffff88801839f808 R8 =0000000000000001 R9 =ffff88801839f898 R10=0000000000038001 R11=000000000001e229 R12=0000000000000001 R13=0000000000000000 R14=ffff88800c4d3680 R15=ffff88800c5a4e80 RIP=ffffffff811fc772 RFL=00000287 [--S--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=00007fd3a837e328 CR3=0000000005482000 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=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