syzkaller login: [ 30.013402] BUG: Bad rss-counter state mm:0000000086290e11 type:MM_FILEPAGES val:33 [ 30.014648] BUG: Bad rss-counter state mm:0000000086290e11 type:MM_ANONPAGES val:22 [ 30.196380] ================================================================== [ 30.197370] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.198384] Read of size 8 at addr ffff88800e0d3310 by task sshd/220 [ 30.199227] [ 30.199575] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.200488] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.201574] Call Trace: [ 30.201915] [ 30.202228] dump_stack_lvl+0x91/0xf0 [ 30.202781] print_report+0xcc/0x620 [ 30.203288] ? __virt_addr_valid+0x102/0x340 [ 30.203885] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.204550] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.205233] kasan_report+0xbe/0xf0 [ 30.205748] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.206435] vma_interval_tree_remove+0xc75/0xec0 [ 30.207080] vma_prepare+0xc54/0x11a0 [ 30.207592] __split_vma+0x5af/0x950 [ 30.208105] ? __pfx___split_vma+0x10/0x10 [ 30.208662] ? find_held_lock+0x2c/0x110 [ 30.209227] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.209838] ? lock_is_held_type+0x9f/0x120 [ 30.210433] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.211084] ? mtree_range_walk+0x632/0x900 [ 30.211681] ? mas_walk+0x5c7/0x7c0 [ 30.212202] do_vmi_munmap+0x1f1/0x2b0 [ 30.212734] mmap_region+0x1f9/0x2660 [ 30.213275] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.213823] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.214611] ? __pfx_lock_acquire+0x10/0x10 [ 30.215186] ? __pfx_mmap_region+0x10/0x10 [ 30.215764] ? security_mmap_addr+0x7d/0xa0 [ 30.216325] ? get_unmapped_area+0x1f5/0x3f0 [ 30.216915] do_mmap+0x854/0xf00 [ 30.217385] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.217911] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.218519] ksys_mmap_pgoff+0x3af/0x500 [ 30.219064] do_syscall_64+0x3f/0x90 [ 30.219576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.220269] RIP: 0033:0x7f1732d57d82 [ 30.220754] 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 [ 30.223043] RSP: 002b:00007fff3d159308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.224015] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1732d57d82 [ 30.224923] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1732191000 [ 30.225817] RBP: 00007f1732191000 R08: 0000000000000009 R09: 0000000000001000 [ 30.226714] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ef4f7bdf70 [ 30.227641] R13: 00007fff3d159320 R14: 00007fff3d159350 R15: 00007fff3d1596b0 [ 30.228555] [ 30.228864] [ 30.229092] Allocated by task 212: [ 30.229548] kasan_save_stack+0x22/0x50 [ 30.230085] kasan_set_track+0x25/0x30 [ 30.230639] __kasan_slab_alloc+0x59/0x70 [ 30.231198] kmem_cache_alloc+0x16b/0x370 [ 30.231756] vm_area_dup+0x20/0x160 [ 30.232240] __split_vma+0x170/0x950 [ 30.232739] split_vma+0xc6/0x110 [ 30.233209] mprotect_fixup+0x8d2/0xb30 [ 30.233744] do_mprotect_pkey+0x87e/0xd40 [ 30.234308] __x64_sys_mprotect+0x78/0xc0 [ 30.234870] do_syscall_64+0x3f/0x90 [ 30.235375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.236065] [ 30.236298] Freed by task 19: [ 30.236715] kasan_save_stack+0x22/0x50 [ 30.237253] kasan_set_track+0x25/0x30 [ 30.237788] kasan_save_free_info+0x2b/0x50 [ 30.238381] __kasan_slab_free+0x10a/0x190 [ 30.238951] kmem_cache_free+0x10d/0x4d0 [ 30.239495] rcu_core+0x8c8/0x2860 [ 30.239962] __do_softirq+0x1b7/0x7d4 [ 30.240479] [ 30.240706] Last potentially related work creation: [ 30.241335] kasan_save_stack+0x22/0x50 [ 30.241875] __kasan_record_aux_stack+0x8e/0xa0 [ 30.242510] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.243210] remove_vma+0x139/0x170 [ 30.243698] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.244308] do_vmi_munmap+0x1f1/0x2b0 [ 30.244834] __vm_munmap+0x138/0x3a0 [ 30.245338] __x64_sys_munmap+0x59/0x80 [ 30.245869] do_syscall_64+0x3f/0x90 [ 30.246417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.247138] [ 30.247378] Second to last potentially related work creation: [ 30.248118] kasan_save_stack+0x22/0x50 [ 30.248649] __kasan_record_aux_stack+0x8e/0xa0 [ 30.249269] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.249962] remove_vma+0x139/0x170 [ 30.250468] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.251066] do_vmi_munmap+0x1f1/0x2b0 [ 30.251594] mmap_region+0x1f9/0x2660 [ 30.252104] do_mmap+0x854/0xf00 [ 30.252569] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.253092] ksys_mmap_pgoff+0x3af/0x500 [ 30.253626] do_syscall_64+0x3f/0x90 [ 30.254141] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.254831] [ 30.255068] The buggy address belongs to the object at ffff88800e0d32b8 [ 30.255068] which belongs to the cache vm_area_struct of size 168 [ 30.256653] The buggy address is located 88 bytes inside of [ 30.256653] freed 168-byte region [ffff88800e0d32b8, ffff88800e0d3360) [ 30.258156] [ 30.258397] The buggy address belongs to the physical page: [ 30.259100] page:00000000eee04e45 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0d3 [ 30.260260] memcg:ffff88800dc45901 [ 30.260715] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.261461] page_type: 0xffffffff() [ 30.261941] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 30.262937] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc45901 [ 30.263915] page dumped because: kasan: bad access detected [ 30.264637] [ 30.264868] Memory state around the buggy address: [ 30.265484] ffff88800e0d3200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.266409] ffff88800e0d3280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.267324] >ffff88800e0d3300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.268230] ^ [ 30.268733] ffff88800e0d3380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.269641] ffff88800e0d3400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.270569] ================================================================== [ 30.271709] Disabling lock debugging due to kernel taint [ 32.495022] BUG: Bad rss-counter state mm:00000000edee4e11 type:MM_FILEPAGES val:33 [ 32.496408] BUG: Bad rss-counter state mm:00000000edee4e11 type:MM_ANONPAGES val:22 [ 32.977726] BUG: Bad rss-counter state mm:000000007f22c556 type:MM_FILEPAGES val:33 [ 32.978687] BUG: Bad rss-counter state mm:000000007f22c556 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30904' (ECDSA) to the list of known hosts. 2023/06/19 19:04:06 fuzzer started 2023/06/19 19:04:06 dialing manager at localhost:44161 2023/06/19 19:04:06 checking machine... 2023/06/19 19:04:06 checking revisions... [ 33.675095] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:04:06 testing simple program... [ 33.717129] cgroup: Unknown subsys name 'net' [ 33.782825] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:04:05 Registers: info registers vcpu 0 RAX=ffffffff864b024b RBX=0000000000000001 RCX=ffffffff864b0246 RDX=dffffc0000000000 RSI=0000000000000000 RDI=1ffffffff0c96049 RBP=ffff8880181079d0 RSP=ffff888018107908 R8 =ffffffff864b024a R9 =ffff8880181079b8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff8880181079d8 R13=ffff8880181079c0 R14=ffff8880181079b9 R15=ffff888018107978 RIP=ffffffff81130aa4 RFL=00000212 [----A--] 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 00007fb7b2a69900 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=00007fb7b301e650 CR3=000000000d638000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007fff99849e78 CR3=000000000e418000 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=2036303a34303a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a34303a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000