[ 24.317194] BUG: Bad rss-counter state mm:0000000015810087 type:MM_FILEPAGES val:33 [ 24.318184] BUG: Bad rss-counter state mm:0000000015810087 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 24.491195] ================================================================== [ 24.492408] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.493509] Read of size 8 at addr ffff88801959b310 by task sshd/219 [ 24.494404] [ 24.494659] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.495659] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.496795] Call Trace: [ 24.497166] [ 24.497496] dump_stack_lvl+0x91/0xf0 [ 24.498059] print_report+0xcc/0x620 [ 24.498619] ? __virt_addr_valid+0x102/0x340 [ 24.499256] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.499977] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.500724] kasan_report+0xbe/0xf0 [ 24.501282] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.501999] vma_interval_tree_remove+0xc75/0xec0 [ 24.502702] vma_prepare+0xc54/0x11a0 [ 24.503261] __split_vma+0x5af/0x950 [ 24.503810] ? __pfx___split_vma+0x10/0x10 [ 24.504432] ? find_held_lock+0x2c/0x110 [ 24.505034] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.505692] ? lock_is_held_type+0x9f/0x120 [ 24.506313] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.507024] ? mtree_range_walk+0x632/0x900 [ 24.507660] ? mas_walk+0x5c7/0x7c0 [ 24.508224] do_vmi_munmap+0x1f1/0x2b0 [ 24.508795] mmap_region+0x1f9/0x2660 [ 24.509349] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.509945] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.510768] ? __pfx_lock_acquire+0x10/0x10 [ 24.511394] ? __pfx_mmap_region+0x10/0x10 [ 24.512006] ? security_mmap_addr+0x7d/0xa0 [ 24.512632] ? get_unmapped_area+0x1f5/0x3f0 [ 24.513266] do_mmap+0x854/0xf00 [ 24.513771] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.514349] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.514995] ksys_mmap_pgoff+0x3af/0x500 [ 24.515582] do_syscall_64+0x3f/0x90 [ 24.516140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.516890] RIP: 0033:0x7f3a1aa19d82 [ 24.517419] 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 [ 24.519883] RSP: 002b:00007ffc4317fc68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.520966] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3a1aa19d82 [ 24.521956] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3a19e53000 [ 24.522933] RBP: 00007f3a19e53000 R08: 0000000000000009 R09: 0000000000001000 [ 24.523914] R10: 0000000000000812 R11: 0000000000000206 R12: 00005571d1decec0 [ 24.524905] R13: 00007ffc4317fc80 R14: 00007ffc4317fcb0 R15: 00007ffc43180010 [ 24.525895] [ 24.526233] [ 24.526485] Allocated by task 212: [ 24.526982] kasan_save_stack+0x22/0x50 [ 24.527566] kasan_set_track+0x25/0x30 [ 24.528160] __kasan_slab_alloc+0x59/0x70 [ 24.528794] kmem_cache_alloc+0x16b/0x370 [ 24.529395] vm_area_dup+0x20/0x160 [ 24.529937] __split_vma+0x170/0x950 [ 24.530499] split_vma+0xc6/0x110 [ 24.531030] mprotect_fixup+0x8d2/0xb30 [ 24.531630] do_mprotect_pkey+0x87e/0xd40 [ 24.532262] __x64_sys_mprotect+0x78/0xc0 [ 24.532889] do_syscall_64+0x3f/0x90 [ 24.533513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.534282] [ 24.534537] Freed by task 210: [ 24.535014] kasan_save_stack+0x22/0x50 [ 24.535627] kasan_set_track+0x25/0x30 [ 24.536237] kasan_save_free_info+0x2b/0x50 [ 24.536882] __kasan_slab_free+0x10a/0x190 [ 24.537554] kmem_cache_free+0x10d/0x4d0 [ 24.538166] rcu_core+0x8c8/0x2860 [ 24.538702] __do_softirq+0x1b7/0x7d4 [ 24.539284] [ 24.539542] Last potentially related work creation: [ 24.540248] kasan_save_stack+0x22/0x50 [ 24.540858] __kasan_record_aux_stack+0x8e/0xa0 [ 24.541556] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.542335] remove_vma+0x139/0x170 [ 24.542890] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.543577] do_vmi_munmap+0x1f1/0x2b0 [ 24.544183] __vm_munmap+0x138/0x3a0 [ 24.544755] __x64_sys_munmap+0x59/0x80 [ 24.545360] do_syscall_64+0x3f/0x90 [ 24.545939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.546712] [ 24.546975] Second to last potentially related work creation: [ 24.547699] kasan_save_stack+0x22/0x50 [ 24.548224] __kasan_record_aux_stack+0x8e/0xa0 [ 24.548799] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.549456] remove_vma+0x139/0x170 [ 24.549915] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.550470] do_vmi_munmap+0x1f1/0x2b0 [ 24.550986] mmap_region+0x1f9/0x2660 [ 24.551496] do_mmap+0x854/0xf00 [ 24.551964] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.552490] ksys_mmap_pgoff+0x3af/0x500 [ 24.553021] do_syscall_64+0x3f/0x90 [ 24.553531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.554225] [ 24.554459] The buggy address belongs to the object at ffff88801959b2b8 [ 24.554459] which belongs to the cache vm_area_struct of size 168 [ 24.556038] The buggy address is located 88 bytes inside of [ 24.556038] freed 168-byte region [ffff88801959b2b8, ffff88801959b360) [ 24.557568] [ 24.557797] The buggy address belongs to the physical page: [ 24.558512] page:000000009de5c542 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1959b [ 24.559685] memcg:ffff88800d2cf801 [ 24.560132] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.560873] page_type: 0xffffffff() [ 24.561345] raw: 0100000000000200 ffff88800879fc80 ffffea000059c780 dead000000000005 [ 24.562314] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2cf801 [ 24.563279] page dumped because: kasan: bad access detected [ 24.563972] [ 24.564220] Memory state around the buggy address: [ 24.564824] ffff88801959b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.565731] ffff88801959b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.566646] >ffff88801959b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.567537] ^ [ 24.568021] ffff88801959b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.568938] ffff88801959b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.569832] ================================================================== [ 24.570826] Disabling lock debugging due to kernel taint [ 26.924748] BUG: Bad rss-counter state mm:0000000067e3c420 type:MM_FILEPAGES val:33 [ 26.925728] BUG: Bad rss-counter state mm:0000000067e3c420 type:MM_ANONPAGES val:22 [ 27.471112] BUG: Bad rss-counter state mm:0000000035fa1d08 type:MM_FILEPAGES val:33 [ 27.472333] BUG: Bad rss-counter state mm:0000000035fa1d08 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38142' (ECDSA) to the list of known hosts. 2023/06/19 22:07:58 fuzzer started 2023/06/19 22:07:58 dialing manager at localhost:44161 2023/06/19 22:07:58 checking machine... 2023/06/19 22:07:58 checking revisions... [ 28.136620] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:07:58 testing simple program... [ 28.189418] cgroup: Unknown subsys name 'net' [ 28.225619] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:07:57 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801cae7310 RCX=0000000000000001 RDX=1ffff1100395ce64 RSI=ffff88801cae7f50 RDI=ffff88801cae7320 RBP=ffff88801cae7f50 RSP=ffff88801cae7268 R8 =ffffffff864b024a R9 =ffff88801cae7350 R10=0000000000038001 R11=00000000000b4fb9 R12=0000000000000008 R13=ffff88801cae0000 R14=ffff88801cae7f58 R15=ffff88801cae7310 RIP=ffffffff81130468 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 00007f89cf296900 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=00007ffc2166a000 CR3=000000000f5dc000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fd1dc175780 CR3=000000000ea58000 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=2038353a37303a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a37303a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000