syzkaller login: [ 31.034655] BUG: Bad rss-counter state mm:000000009cfa14df type:MM_FILEPAGES val:33 [ 31.035370] BUG: Bad rss-counter state mm:000000009cfa14df type:MM_ANONPAGES val:22 [ 31.197214] ================================================================== [ 31.198336] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.199571] Read of size 8 at addr ffff888019d29d08 by task sshd/219 [ 31.200575] [ 31.200846] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.201899] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.203071] Call Trace: [ 31.203458] [ 31.203804] dump_stack_lvl+0x91/0xf0 [ 31.204395] print_report+0xcc/0x620 [ 31.205001] ? __virt_addr_valid+0x102/0x340 [ 31.205587] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.206217] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.206854] kasan_report+0xbe/0xf0 [ 31.207344] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.207986] vma_interval_tree_remove+0xc75/0xec0 [ 31.208600] vma_prepare+0xc54/0x11a0 [ 31.209094] __split_vma+0x5af/0x950 [ 31.209563] ? __pfx___split_vma+0x10/0x10 [ 31.210108] ? find_held_lock+0x2c/0x110 [ 31.210637] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.211216] ? lock_is_held_type+0x9f/0x120 [ 31.211753] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.212356] ? mtree_range_walk+0x632/0x900 [ 31.212911] ? mas_walk+0x5c7/0x7c0 [ 31.213387] do_vmi_munmap+0x1f1/0x2b0 [ 31.213887] mmap_region+0x1f9/0x2660 [ 31.214369] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.214884] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.215599] ? __pfx_lock_acquire+0x10/0x10 [ 31.216130] ? __pfx_mmap_region+0x10/0x10 [ 31.216687] ? security_mmap_addr+0x7d/0xa0 [ 31.217215] ? get_unmapped_area+0x1f5/0x3f0 [ 31.217770] do_mmap+0x854/0xf00 [ 31.218208] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.218700] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.219261] ksys_mmap_pgoff+0x3af/0x500 [ 31.219775] do_syscall_64+0x3f/0x90 [ 31.220261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.220922] RIP: 0033:0x7f554d138d82 [ 31.221389] 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 [ 31.223567] RSP: 002b:00007ffcdadaba58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.224497] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f554d138d82 [ 31.225371] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f554c572000 [ 31.226232] RBP: 00007f554c572000 R08: 0000000000000009 R09: 0000000000001000 [ 31.227101] R10: 0000000000000812 R11: 0000000000000206 R12: 00005597b66e8ec0 [ 31.227970] R13: 00007ffcdadaba70 R14: 00007ffcdadabaa0 R15: 00007ffcdadabe00 [ 31.228871] [ 31.229163] [ 31.229377] Allocated by task 212: [ 31.229822] kasan_save_stack+0x22/0x50 [ 31.230342] kasan_set_track+0x25/0x30 [ 31.230853] __kasan_slab_alloc+0x59/0x70 [ 31.231378] kmem_cache_alloc+0x16b/0x370 [ 31.231908] vm_area_dup+0x20/0x160 [ 31.232363] __split_vma+0x170/0x950 [ 31.232852] split_vma+0xc6/0x110 [ 31.233295] mprotect_fixup+0x8d2/0xb30 [ 31.233796] do_mprotect_pkey+0x87e/0xd40 [ 31.234320] __x64_sys_mprotect+0x78/0xc0 [ 31.234848] do_syscall_64+0x3f/0x90 [ 31.235322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.235968] [ 31.236189] Freed by task 13: [ 31.236588] kasan_save_stack+0x22/0x50 [ 31.237096] kasan_set_track+0x25/0x30 [ 31.237589] kasan_save_free_info+0x2b/0x50 [ 31.238126] __kasan_slab_free+0x10a/0x190 [ 31.238669] kmem_cache_free+0x10d/0x4d0 [ 31.239181] rcu_core+0x8c8/0x2860 [ 31.239636] __do_softirq+0x1b7/0x7d4 [ 31.240113] [ 31.240329] Last potentially related work creation: [ 31.240940] kasan_save_stack+0x22/0x50 [ 31.241532] __kasan_record_aux_stack+0x8e/0xa0 [ 31.242104] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.242757] remove_vma+0x139/0x170 [ 31.243210] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.243769] do_vmi_munmap+0x1f1/0x2b0 [ 31.244256] __vm_munmap+0x138/0x3a0 [ 31.244751] __x64_sys_munmap+0x59/0x80 [ 31.245252] do_syscall_64+0x3f/0x90 [ 31.245742] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.246384] [ 31.246599] The buggy address belongs to the object at ffff888019d29cb0 [ 31.246599] which belongs to the cache vm_area_struct of size 168 [ 31.248071] The buggy address is located 88 bytes inside of [ 31.248071] freed 168-byte region [ffff888019d29cb0, ffff888019d29d58) [ 31.249480] [ 31.249703] The buggy address belongs to the physical page: [ 31.250358] page:0000000097de2839 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d29 [ 31.251454] memcg:ffff888016737801 [ 31.251890] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.252598] page_type: 0xffffffff() [ 31.253049] raw: 0100000000000200 ffff88800879fc80 ffffea0000674880 000000000000000b [ 31.253969] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016737801 [ 31.254876] page dumped because: kasan: bad access detected [ 31.255538] [ 31.255754] Memory state around the buggy address: [ 31.256344] ffff888019d29c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.257234] ffff888019d29c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.258095] >ffff888019d29d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.258975] ^ [ 31.259413] ffff888019d29d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.260290] ffff888019d29e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.261179] ================================================================== [ 31.262160] Disabling lock debugging due to kernel taint [ 33.591060] BUG: Bad rss-counter state mm:00000000a8de9515 type:MM_FILEPAGES val:33 [ 33.591834] BUG: Bad rss-counter state mm:00000000a8de9515 type:MM_ANONPAGES val:22 [ 34.023620] BUG: Bad rss-counter state mm:00000000af72e5ed type:MM_FILEPAGES val:33 [ 34.024651] BUG: Bad rss-counter state mm:00000000af72e5ed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15675' (ECDSA) to the list of known hosts. 2023/06/20 04:13:35 fuzzer started 2023/06/20 04:13:36 dialing manager at localhost:44161 2023/06/20 04:13:36 checking machine... 2023/06/20 04:13:36 checking revisions... [ 34.667995] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:13:36 testing simple program... [ 34.715990] cgroup: Unknown subsys name 'net' [ 34.764196] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:13:35 Registers: info registers vcpu 0 RAX=1ffffffff0c0a9c3 RBX=ffffffff86054e1c RCX=ffffffff86605972 RDX=0000000000000000 RSI=ffffffff860723cc RDI=ffffffff85d793d4 RBP=ffffffff86054830 RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff8605540c R13=ffffffff85d793d4 R14=ffffffff8605482c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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=00007fcc7c09f000 CR3=000000000680e000 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=2035333a33313a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a33313a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff860d0c26 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801ca5faf0 RSP=ffff88801ca5fa28 R8 =ffffffff860d0c2a R9 =ffff88801ca5fad8 R10=0000000000038001 R11=000000000000fc0f R12=ffff88801ca5faf8 R13=ffff88801ca5fae0 R14=ffff88801ca5fe58 R15=ffff88801ca5fa98 RIP=ffffffff81130bc6 RFL=00000297 [--S-APC] 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 00007faa47164900 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=00007ffe1df31ff8 CR3=000000000ec5e000 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=563412feff00545000000000000080fe 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