[ 23.804055] BUG: Bad rss-counter state mm:00000000e53afc95 type:MM_FILEPAGES val:33 [ 23.805094] BUG: Bad rss-counter state mm:00000000e53afc95 type:MM_ANONPAGES val:22 [ 23.937718] ================================================================== [ 23.938621] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.939549] Read of size 8 at addr ffff88800d9f0140 by task sshd/220 [ 23.940306] [ 23.940523] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.941528] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.942503] Call Trace: [ 23.942818] [ 23.943100] dump_stack_lvl+0x91/0xf0 [ 23.943591] print_report+0xcc/0x620 [ 23.944078] ? __virt_addr_valid+0x102/0x340 [ 23.944629] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.945272] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.945891] kasan_report+0xbe/0xf0 [ 23.946377] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.946993] vma_interval_tree_remove+0xc75/0xec0 [ 23.947602] vma_prepare+0xc54/0x11a0 [ 23.948077] __split_vma+0x5af/0x950 [ 23.948547] ? __pfx___split_vma+0x10/0x10 [ 23.949088] ? find_held_lock+0x2c/0x110 [ 23.949606] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.950171] ? lock_is_held_type+0x9f/0x120 [ 23.950717] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.951330] ? mtree_range_walk+0x632/0x900 [ 23.951895] ? mas_walk+0x5c7/0x7c0 [ 23.952376] do_vmi_munmap+0x1f1/0x2b0 [ 23.952879] mmap_region+0x1f9/0x2660 [ 23.953371] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.953891] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.954608] ? __pfx_lock_acquire+0x10/0x10 [ 23.955141] ? __pfx_mmap_region+0x10/0x10 [ 23.955675] ? security_mmap_addr+0x7d/0xa0 [ 23.956201] ? get_unmapped_area+0x1f5/0x3f0 [ 23.956746] do_mmap+0x854/0xf00 [ 23.957202] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.957697] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.958261] ksys_mmap_pgoff+0x3af/0x500 [ 23.958771] do_syscall_64+0x3f/0x90 [ 23.959255] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.959900] RIP: 0033:0x7f32d0cabd82 [ 23.960354] 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 [ 23.962490] RSP: 002b:00007fff1333f788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.963401] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f32d0cabd82 [ 23.964254] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f32d00e5000 [ 23.965123] RBP: 00007f32d00e5000 R08: 0000000000000009 R09: 0000000000001000 [ 23.965969] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560efb8bff70 [ 23.966840] R13: 00007fff1333f7a0 R14: 00007fff1333f7d0 R15: 00007fff1333fb30 [ 23.967760] [ 23.968066] [ 23.968291] Allocated by task 212: [ 23.968756] kasan_save_stack+0x22/0x50 [ 23.969307] kasan_set_track+0x25/0x30 [ 23.969843] __kasan_slab_alloc+0x59/0x70 [ 23.970398] kmem_cache_alloc+0x16b/0x370 [ 23.970955] vm_area_dup+0x20/0x160 [ 23.971442] __split_vma+0x170/0x950 [ 23.971939] split_vma+0xc6/0x110 [ 23.972405] mprotect_fixup+0x8d2/0xb30 [ 23.972948] do_mprotect_pkey+0x87e/0xd40 [ 23.973498] __x64_sys_mprotect+0x78/0xc0 [ 23.974063] do_syscall_64+0x3f/0x90 [ 23.974567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.975255] [ 23.975484] Freed by task 13: [ 23.975879] kasan_save_stack+0x22/0x50 [ 23.976401] kasan_set_track+0x25/0x30 [ 23.976910] kasan_save_free_info+0x2b/0x50 [ 23.977485] __kasan_slab_free+0x10a/0x190 [ 23.978036] kmem_cache_free+0x10d/0x4d0 [ 23.978567] rcu_core+0x8c8/0x2860 [ 23.979032] __do_softirq+0x1b7/0x7d4 [ 23.979528] [ 23.979756] Last potentially related work creation: [ 23.980377] kasan_save_stack+0x22/0x50 [ 23.980902] __kasan_record_aux_stack+0x8e/0xa0 [ 23.981511] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.982184] remove_vma+0x139/0x170 [ 23.982720] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.983295] do_vmi_munmap+0x1f1/0x2b0 [ 23.983799] __vm_munmap+0x138/0x3a0 [ 23.984287] __x64_sys_munmap+0x59/0x80 [ 23.984804] do_syscall_64+0x3f/0x90 [ 23.985323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.986002] [ 23.986230] The buggy address belongs to the object at ffff88800d9f00e8 [ 23.986230] which belongs to the cache vm_area_struct of size 168 [ 23.987768] The buggy address is located 88 bytes inside of [ 23.987768] freed 168-byte region [ffff88800d9f00e8, ffff88800d9f0190) [ 23.989248] [ 23.989471] The buggy address belongs to the physical page: [ 23.990162] page:00000000e715c6db refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9f0 [ 23.991309] memcg:ffff888014480e01 [ 23.991752] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.992420] page_type: 0xffffffff() [ 23.992890] raw: 0100000000000200 ffff8880087a0c80 ffffea0000315f40 dead000000000006 [ 23.993869] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014480e01 [ 23.994826] page dumped because: kasan: bad access detected [ 23.995524] [ 23.995755] Memory state around the buggy address: [ 23.996364] ffff88800d9f0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.997289] ffff88800d9f0080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 23.998188] >ffff88800d9f0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.999092] ^ [ 23.999757] ffff88800d9f0180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 24.000652] ffff88800d9f0200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.001547] ================================================================== [ 24.002516] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.608523] BUG: Bad rss-counter state mm:00000000de388cca type:MM_FILEPAGES val:33 [ 25.609546] BUG: Bad rss-counter state mm:00000000de388cca type:MM_ANONPAGES val:22 [ 26.099259] BUG: Bad rss-counter state mm:00000000c3a32985 type:MM_FILEPAGES val:33 [ 26.100322] BUG: Bad rss-counter state mm:00000000c3a32985 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4751' (ECDSA) to the list of known hosts. 2023/06/20 13:46:09 fuzzer started 2023/06/20 13:46:10 dialing manager at localhost:36067 2023/06/20 13:46:10 checking machine... 2023/06/20 13:46:10 checking revisions... [ 26.793618] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:46:10 testing simple program... [ 26.838553] cgroup: Unknown subsys name 'net' [ 26.882420] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:46:09 Registers: info registers vcpu 0 RAX=ffffffff8451349f RBX=ffffffff813ad470 RCX=ffffffff864bce01 RDX=1ffff1100d9c135e RSI=0000000000000000 RDI=ffffffff8451349f RBP=ffff88806ce09b30 RSP=ffff88806ce09a98 R8 =ffffffff864bce30 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801bcfac60 RIP=ffffffff810bd06d 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=00007f150ed98190 CR3=000000000ca9c000 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=996292ea899c0287444dd1c46d7dbbdd XMM02=2c67c8bc2e329bc3000000000011d508 XMM03=fb795ef6d65770560000000000120868 XMM04=c1decd081251656d00000000000ae988 XMM05=19e9129bd510f2350000000000130cb8 XMM06=f8fec0333e8b9791000000000012f728 XMM07=e042d86d42eb936e0000000000121420 XMM08=84c7d984d7ff4145000000000011d568 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888019ffb000 RCX=0000000000000000 RDX=ffff88801477b680 RSI=ffffffff83871bd7 RDI=0000000000000005 RBP=ffff888008f65000 RSP=ffff88800ff1fb10 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=ffff888008f65698 R13=ffff88800e3128c0 R14=0000000000000014 R15=0000000000000001 RIP=ffffffff814c089b 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 00007f71db3e3900 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=00007fffd7c3a000 CR3=000000000f24c000 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=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