syzkaller login: [ 30.034658] BUG: Bad rss-counter state mm:0000000067952818 type:MM_FILEPAGES val:33 [ 30.036595] BUG: Bad rss-counter state mm:0000000067952818 type:MM_ANONPAGES val:22 [ 30.203567] ================================================================== [ 30.204555] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.205563] Read of size 8 at addr ffff88800d87fc20 by task sshd/220 [ 30.206375] [ 30.206641] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.207558] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.208604] Call Trace: [ 30.208942] [ 30.209252] dump_stack_lvl+0x91/0xf0 [ 30.209770] print_report+0xcc/0x620 [ 30.210291] ? __virt_addr_valid+0x102/0x340 [ 30.210886] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.211548] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.212210] kasan_report+0xbe/0xf0 [ 30.212728] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.213409] vma_interval_tree_remove+0xc75/0xec0 [ 30.214073] vma_prepare+0xc54/0x11a0 [ 30.214605] __split_vma+0x5af/0x950 [ 30.215128] ? __pfx___split_vma+0x10/0x10 [ 30.215709] ? find_held_lock+0x2c/0x110 [ 30.216285] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.216910] ? lock_is_held_type+0x9f/0x120 [ 30.217498] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.218164] ? mtree_range_walk+0x632/0x900 [ 30.218790] ? mas_walk+0x5c7/0x7c0 [ 30.219312] do_vmi_munmap+0x1f1/0x2b0 [ 30.219850] mmap_region+0x1f9/0x2660 [ 30.220384] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.220946] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.221734] ? __pfx_lock_acquire+0x10/0x10 [ 30.222325] ? __pfx_mmap_region+0x10/0x10 [ 30.222952] ? security_mmap_addr+0x7d/0xa0 [ 30.223541] ? get_unmapped_area+0x1f5/0x3f0 [ 30.224149] do_mmap+0x854/0xf00 [ 30.224635] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.225180] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.225805] ksys_mmap_pgoff+0x3af/0x500 [ 30.226364] do_syscall_64+0x3f/0x90 [ 30.226912] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.227626] RIP: 0033:0x7f65fec2cd82 [ 30.228132] 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 [ 30.230483] RSP: 002b:00007ffe87c0cf18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.231492] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f65fec2cd82 [ 30.232430] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f65fe066000 [ 30.233369] RBP: 00007f65fe066000 R08: 0000000000000009 R09: 0000000000001000 [ 30.234309] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c4dad2dec0 [ 30.235253] R13: 00007ffe87c0cf30 R14: 00007ffe87c0cf60 R15: 00007ffe87c0d2c0 [ 30.236201] [ 30.236525] [ 30.236791] Allocated by task 212: [ 30.237275] kasan_save_stack+0x22/0x50 [ 30.237827] kasan_set_track+0x25/0x30 [ 30.238376] __kasan_slab_alloc+0x59/0x70 [ 30.238963] kmem_cache_alloc+0x16b/0x370 [ 30.239532] vm_area_dup+0x20/0x160 [ 30.240034] __split_vma+0x170/0x950 [ 30.240555] split_vma+0xc6/0x110 [ 30.241039] mprotect_fixup+0x8d2/0xb30 [ 30.241591] do_mprotect_pkey+0x87e/0xd40 [ 30.242167] __x64_sys_mprotect+0x78/0xc0 [ 30.242752] do_syscall_64+0x3f/0x90 [ 30.243276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.243990] [ 30.244227] Freed by task 212: [ 30.244664] kasan_save_stack+0x22/0x50 [ 30.245220] kasan_set_track+0x25/0x30 [ 30.245769] kasan_save_free_info+0x2b/0x50 [ 30.246362] __kasan_slab_free+0x10a/0x190 [ 30.246967] kmem_cache_free+0x10d/0x4d0 [ 30.247537] rcu_core+0x8c8/0x2860 [ 30.248029] __do_softirq+0x1b7/0x7d4 [ 30.248557] [ 30.248797] Last potentially related work creation: [ 30.249448] kasan_save_stack+0x22/0x50 [ 30.250007] __kasan_record_aux_stack+0x8e/0xa0 [ 30.250651] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.251368] remove_vma+0x139/0x170 [ 30.251867] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.252490] do_vmi_munmap+0x1f1/0x2b0 [ 30.253029] __vm_munmap+0x138/0x3a0 [ 30.253545] __x64_sys_munmap+0x59/0x80 [ 30.254095] do_syscall_64+0x3f/0x90 [ 30.254621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.255336] [ 30.255577] Second to last potentially related work creation: [ 30.256343] kasan_save_stack+0x22/0x50 [ 30.256902] __kasan_record_aux_stack+0x8e/0xa0 [ 30.257540] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.258247] remove_vma+0x139/0x170 [ 30.258762] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.259383] do_vmi_munmap+0x1f1/0x2b0 [ 30.259919] mmap_region+0x1f9/0x2660 [ 30.260449] do_mmap+0x854/0xf00 [ 30.260925] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.261462] ksys_mmap_pgoff+0x3af/0x500 [ 30.262017] do_syscall_64+0x3f/0x90 [ 30.262552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.263233] [ 30.263474] The buggy address belongs to the object at ffff88800d87fbc8 [ 30.263474] which belongs to the cache vm_area_struct of size 168 [ 30.265043] The buggy address is located 88 bytes inside of [ 30.265043] freed 168-byte region [ffff88800d87fbc8, ffff88800d87fc70) [ 30.266557] [ 30.266794] The buggy address belongs to the physical page: [ 30.267506] page:000000005bbd2ae3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd87f [ 30.268666] memcg:ffff88800e6f9601 [ 30.269119] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.269814] page_type: 0xffffffff() [ 30.270293] raw: 0100000000000200 ffff88800879fc80 ffffea0000391e80 dead000000000002 [ 30.271284] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6f9601 [ 30.272247] page dumped because: kasan: bad access detected [ 30.272956] [ 30.273185] Memory state around the buggy address: [ 30.273818] ffff88800d87fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.274776] ffff88800d87fb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.275720] >ffff88800d87fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.276664] ^ [ 30.277248] ffff88800d87fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.278198] ffff88800d87fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.279151] ================================================================== [ 30.280206] Disabling lock debugging due to kernel taint [ 32.220492] BUG: Bad rss-counter state mm:000000009b895bc8 type:MM_FILEPAGES val:33 [ 32.221473] BUG: Bad rss-counter state mm:000000009b895bc8 type:MM_ANONPAGES val:22 [ 32.679008] BUG: Bad rss-counter state mm:00000000a9dfe690 type:MM_FILEPAGES val:33 [ 32.680145] BUG: Bad rss-counter state mm:00000000a9dfe690 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42875' (ECDSA) to the list of known hosts. 2023/06/20 02:54:14 fuzzer started 2023/06/20 02:54:15 dialing manager at localhost:44161 2023/06/20 02:54:15 checking machine... 2023/06/20 02:54:15 checking revisions... [ 33.253907] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:54:15 testing simple program... [ 33.293864] cgroup: Unknown subsys name 'net' [ 33.325648] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:54:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8363c3fe RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000010 RSP=ffff888015a2fe18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000003 R13=0000000000000009 R14=ffff888019da5c00 R15=0000000000000000 RIP=ffffffff814c01c9 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 00007f55c4673900 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=00007f55c4c2b0b0 CR3=000000000e4e4000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=ffff888008c58400 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=00007ffa544cb870 CR3=000000000c7d8000 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=c71422caa53963951e4be83e5d9785ce XMM02=2c67c8bc2e329bc3000000000011c688 XMM03=fb795ef6d657705600000000001233a0 XMM04=80002fb58fa61f3a00000000000ae988 XMM05=19e9129bd510f2350000000000134928 XMM06=20fc62faad455ef10000000000133790 XMM07=e042d86d42eb936e0000000000123d08 XMM08=1941542fe0fffa8c000000000011c6e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000