syzkaller login: [ 61.191914] BUG: Bad rss-counter state mm:00000000875ae443 type:MM_FILEPAGES val:33 [ 61.192612] BUG: Bad rss-counter state mm:00000000875ae443 type:MM_ANONPAGES val:22 [ 61.317442] ================================================================== [ 61.318162] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.318807] Read of size 8 at addr ffff88801006ded8 by task sshd/219 [ 61.319360] [ 61.319502] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.320074] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.320715] Call Trace: [ 61.320925] [ 61.321118] dump_stack_lvl+0x91/0xf0 [ 61.321456] print_report+0xcc/0x620 [ 61.321998] ? __virt_addr_valid+0x102/0x340 [ 61.322397] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.322828] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.323258] kasan_report+0xbe/0xf0 [ 61.323589] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.324048] vma_interval_tree_remove+0xc75/0xec0 [ 61.324469] vma_prepare+0xc54/0x11a0 [ 61.324809] __split_vma+0x5af/0x950 [ 61.325153] ? __pfx___split_vma+0x10/0x10 [ 61.325525] ? find_held_lock+0x2c/0x110 [ 61.325954] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.326356] ? lock_is_held_type+0x9f/0x120 [ 61.326719] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.327149] ? mtree_range_walk+0x632/0x900 [ 61.327537] ? mas_walk+0x5c7/0x7c0 [ 61.327872] do_vmi_munmap+0x1f1/0x2b0 [ 61.328233] mmap_region+0x1f9/0x2660 [ 61.328571] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.328929] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.329428] ? __pfx_lock_acquire+0x10/0x10 [ 61.329826] ? __pfx_mmap_region+0x10/0x10 [ 61.330173] ? security_mmap_addr+0x7d/0xa0 [ 61.330556] ? get_unmapped_area+0x1f5/0x3f0 [ 61.330927] do_mmap+0x854/0xf00 [ 61.331231] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.331584] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.331968] ksys_mmap_pgoff+0x3af/0x500 [ 61.332324] do_syscall_64+0x3f/0x90 [ 61.332669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.333126] RIP: 0033:0x7f6ce042ad82 [ 61.333433] 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 [ 61.334954] RSP: 002b:00007ffea995d2d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.335585] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6ce042ad82 [ 61.336209] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6cdf864000 [ 61.336803] RBP: 00007f6cdf864000 R08: 0000000000000009 R09: 0000000000001000 [ 61.337400] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556309044ec0 [ 61.338048] R13: 00007ffea995d2f0 R14: 00007ffea995d320 R15: 00007ffea995d680 [ 61.338659] [ 61.338873] [ 61.339021] Allocated by task 212: [ 61.339324] kasan_save_stack+0x22/0x50 [ 61.339672] kasan_set_track+0x25/0x30 [ 61.340018] __kasan_slab_alloc+0x59/0x70 [ 61.340399] kmem_cache_alloc+0x16b/0x370 [ 61.340761] vm_area_dup+0x20/0x160 [ 61.341083] __split_vma+0x170/0x950 [ 61.341422] split_vma+0xc6/0x110 [ 61.341799] mprotect_fixup+0x8d2/0xb30 [ 61.342170] do_mprotect_pkey+0x87e/0xd40 [ 61.342527] __x64_sys_mprotect+0x78/0xc0 [ 61.342887] do_syscall_64+0x3f/0x90 [ 61.343247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.343765] [ 61.343928] Freed by task 19: [ 61.344198] kasan_save_stack+0x22/0x50 [ 61.344542] kasan_set_track+0x25/0x30 [ 61.344873] kasan_save_free_info+0x2b/0x50 [ 61.345255] __kasan_slab_free+0x10a/0x190 [ 61.345689] kmem_cache_free+0x10d/0x4d0 [ 61.346050] rcu_core+0x8c8/0x2860 [ 61.346368] __do_softirq+0x1b7/0x7d4 [ 61.346706] [ 61.346864] Last potentially related work creation: [ 61.347272] kasan_save_stack+0x22/0x50 [ 61.347628] __kasan_record_aux_stack+0x8e/0xa0 [ 61.348032] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.348489] remove_vma+0x139/0x170 [ 61.348806] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.349210] do_vmi_munmap+0x1f1/0x2b0 [ 61.349551] __vm_munmap+0x138/0x3a0 [ 61.349894] __x64_sys_munmap+0x59/0x80 [ 61.350239] do_syscall_64+0x3f/0x90 [ 61.350566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.351027] [ 61.351181] The buggy address belongs to the object at ffff88801006de80 [ 61.351181] which belongs to the cache vm_area_struct of size 168 [ 61.352208] The buggy address is located 88 bytes inside of [ 61.352208] freed 168-byte region [ffff88801006de80, ffff88801006df28) [ 61.353189] [ 61.353338] The buggy address belongs to the physical page: [ 61.353795] page:00000000f9cec35c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1006d [ 61.354570] memcg:ffff888016a4f101 [ 61.354856] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.355320] page_type: 0xffffffff() [ 61.355633] raw: 0100000000000200 ffff88800879fc80 ffffea000064c500 dead000000000005 [ 61.356257] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a4f101 [ 61.356894] page dumped because: kasan: bad access detected [ 61.357357] [ 61.357503] Memory state around the buggy address: [ 61.357966] ffff88801006dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 61.358577] ffff88801006de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 61.359182] >ffff88801006de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.359760] ^ [ 61.360266] ffff88801006df00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 61.360866] ffff88801006df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 61.361453] ================================================================== [ 61.362222] Disabling lock debugging due to kernel taint [ 63.098431] BUG: Bad rss-counter state mm:00000000ea8f5702 type:MM_FILEPAGES val:33 [ 63.099174] BUG: Bad rss-counter state mm:00000000ea8f5702 type:MM_ANONPAGES val:22 [ 63.567231] BUG: Bad rss-counter state mm:00000000dfde285b type:MM_FILEPAGES val:33 [ 63.568248] BUG: Bad rss-counter state mm:00000000dfde285b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41431' (ECDSA) to the list of known hosts. 2023/06/20 08:31:49 fuzzer started 2023/06/20 08:31:49 dialing manager at localhost:44161 2023/06/20 08:31:49 checking machine... 2023/06/20 08:31:49 checking revisions... [ 64.092917] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:31:49 testing simple program... [ 64.136483] cgroup: Unknown subsys name 'net' [ 64.170966] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:31:48 Registers: info registers vcpu 0 RAX=0000000000000006 RBX=0000555df0593d60 RCX=000000000000001f RDX=00007f9fa3147b5f RSI=0000000000000003 RDI=0000000000000000 RBP=00007ffdb02ab7c0 RSP=00007ffdb02ab658 R8 =0000000000000005 R9 =ffffffffffffff01 R10=0000000000000002 R11=0000555df0594358 R12=00000000ffffffff R13=00000000fffffffa R14=0000555df059d3d0 R15=0000000000000002 RIP=00007f9fa3039dcc RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9fa2554900 00000000 00000000 GS =0000 0000000000000000 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=00007f9fa1968f10 CR3=000000000d79e000 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=00000000000000000000000000000000 XMM02=00000000000000410000000000000038 XMM03=000000006563696c732e6d6574737973 XMM04=c81903391d51743600000000000ae988 XMM05=2b9206849055e3b50000000000134568 XMM06=806171799158d9670000000000133358 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff860d0c2b RBX=0000000000000001 RCX=ffffffff860d0c26 RDX=0000000000000000 RSI=0000000000000003 RDI=ffffffff85db8410 RBP=ffff888008e57958 RSP=ffff888008e57890 R8 =ffffffff860d0c26 R9 =ffff888008e57940 R10=0000000000038001 R11=000000000000fc0f R12=ffff888008e57960 R13=ffff888008e57948 R14=ffff888008e57941 R15=ffff888008e57900 RIP=ffffffff81130a64 RFL=00000293 [--S-A-C] 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=00007fff808b5000 CR3=000000000eff0000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000