syzkaller login: [ 29.032944] BUG: Bad rss-counter state mm:000000006edd289f type:MM_FILEPAGES val:33 [ 29.034008] BUG: Bad rss-counter state mm:000000006edd289f type:MM_ANONPAGES val:22 [ 29.198709] ================================================================== [ 29.199811] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.201041] Read of size 8 at addr ffff88801bc8b140 by task sshd/220 [ 29.201863] [ 29.202088] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.202950] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.203942] Call Trace: [ 29.204260] [ 29.204547] dump_stack_lvl+0x91/0xf0 [ 29.205034] print_report+0xcc/0x620 [ 29.205514] ? __virt_addr_valid+0x102/0x340 [ 29.206102] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.206734] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.207358] kasan_report+0xbe/0xf0 [ 29.207835] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.208463] vma_interval_tree_remove+0xc75/0xec0 [ 29.209068] vma_prepare+0xc54/0x11a0 [ 29.209560] __split_vma+0x5af/0x950 [ 29.210040] ? __pfx___split_vma+0x10/0x10 [ 29.210594] ? find_held_lock+0x2c/0x110 [ 29.211122] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.211687] ? lock_is_held_type+0x9f/0x120 [ 29.212222] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.212849] ? mtree_range_walk+0x632/0x900 [ 29.213405] ? mas_walk+0x5c7/0x7c0 [ 29.213883] do_vmi_munmap+0x1f1/0x2b0 [ 29.214407] mmap_region+0x1f9/0x2660 [ 29.214895] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.215413] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.216150] ? __pfx_lock_acquire+0x10/0x10 [ 29.216689] ? __pfx_mmap_region+0x10/0x10 [ 29.217232] ? security_mmap_addr+0x7d/0xa0 [ 29.217773] ? get_unmapped_area+0x1f5/0x3f0 [ 29.218327] do_mmap+0x854/0xf00 [ 29.218781] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.219274] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.219839] ksys_mmap_pgoff+0x3af/0x500 [ 29.220354] do_syscall_64+0x3f/0x90 [ 29.220835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.221482] RIP: 0033:0x7f93aa6f8d82 [ 29.221948] 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 [ 29.224100] RSP: 002b:00007ffcbb1d3058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.225001] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f93aa6f8d82 [ 29.225851] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f93a9b32000 [ 29.226696] RBP: 00007f93a9b32000 R08: 0000000000000009 R09: 0000000000001000 [ 29.227537] R10: 0000000000000812 R11: 0000000000000206 R12: 00005588a9b34d90 [ 29.228381] R13: 00007ffcbb1d3070 R14: 00007ffcbb1d30a0 R15: 00007ffcbb1d3400 [ 29.229236] [ 29.229527] [ 29.229742] Allocated by task 213: [ 29.230175] kasan_save_stack+0x22/0x50 [ 29.230680] kasan_set_track+0x25/0x30 [ 29.231174] __kasan_slab_alloc+0x59/0x70 [ 29.231698] kmem_cache_alloc+0x16b/0x370 [ 29.232212] vm_area_dup+0x20/0x160 [ 29.232683] __split_vma+0x170/0x950 [ 29.233149] split_vma+0xc6/0x110 [ 29.233599] mprotect_fixup+0x8d2/0xb30 [ 29.234114] do_mprotect_pkey+0x87e/0xd40 [ 29.234644] __x64_sys_mprotect+0x78/0xc0 [ 29.235170] do_syscall_64+0x3f/0x90 [ 29.235648] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.236294] [ 29.236510] Freed by task 19: [ 29.236898] kasan_save_stack+0x22/0x50 [ 29.237402] kasan_set_track+0x25/0x30 [ 29.237896] kasan_save_free_info+0x2b/0x50 [ 29.238448] __kasan_slab_free+0x10a/0x190 [ 29.238981] kmem_cache_free+0x10d/0x4d0 [ 29.239489] rcu_core+0x8c8/0x2860 [ 29.239930] __do_softirq+0x1b7/0x7d4 [ 29.240416] [ 29.240639] Last potentially related work creation: [ 29.241215] kasan_save_stack+0x22/0x50 [ 29.241819] __kasan_record_aux_stack+0x8e/0xa0 [ 29.242427] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.243071] remove_vma+0x139/0x170 [ 29.243527] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.244087] do_vmi_munmap+0x1f1/0x2b0 [ 29.244582] __vm_munmap+0x138/0x3a0 [ 29.245055] __x64_sys_munmap+0x59/0x80 [ 29.245553] do_syscall_64+0x3f/0x90 [ 29.246034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.246696] [ 29.246914] The buggy address belongs to the object at ffff88801bc8b0e8 [ 29.246914] which belongs to the cache vm_area_struct of size 168 [ 29.248377] The buggy address is located 88 bytes inside of [ 29.248377] freed 168-byte region [ffff88801bc8b0e8, ffff88801bc8b190) [ 29.249757] [ 29.249974] The buggy address belongs to the physical page: [ 29.250634] page:00000000981980aa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc8b [ 29.251701] memcg:ffff88800d85f401 [ 29.252121] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.252757] page_type: 0xffffffff() [ 29.253200] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.254107] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d85f401 [ 29.254999] page dumped because: kasan: bad access detected [ 29.255654] [ 29.255868] Memory state around the buggy address: [ 29.256438] ffff88801bc8b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.257277] ffff88801bc8b080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 29.258130] >ffff88801bc8b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.258966] ^ [ 29.259594] ffff88801bc8b180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 29.260435] ffff88801bc8b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 29.261274] ================================================================== [ 29.262192] Disabling lock debugging due to kernel taint [ 31.351716] BUG: Bad rss-counter state mm:00000000d0fd40a1 type:MM_FILEPAGES val:33 [ 31.352698] BUG: Bad rss-counter state mm:00000000d0fd40a1 type:MM_ANONPAGES val:22 [ 31.809537] BUG: Bad rss-counter state mm:00000000f17e8140 type:MM_FILEPAGES val:33 [ 31.810712] BUG: Bad rss-counter state mm:00000000f17e8140 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43335' (ECDSA) to the list of known hosts. 2023/06/20 07:11:40 fuzzer started 2023/06/20 07:11:40 dialing manager at localhost:44161 2023/06/20 07:11:40 checking machine... 2023/06/20 07:11:40 checking revisions... [ 32.531755] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:11:40 testing simple program... [ 32.575884] cgroup: Unknown subsys name 'net' [ 32.625782] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:11:39 Registers: info registers vcpu 0 RAX=1ffff11001de5543 RBX=ffff88800ef2a9e8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800ef2aa18 RBP=ffff888019ac5658 RSP=ffff888009d4fd08 R8 =0000000000000001 R9 =ffffed10013a9f95 R10=0000000000000003 R11=00000000000b6cb2 R12=dffffc0000000000 R13=ffff888019ad0540 R14=ffffffff818d9dc6 R15=ffff88800c920180 RIP=ffffffff81846362 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fad1c771900 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=00007ffd91a0f000 CR3=000000001c9a4000 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=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 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=0000000000000001 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=00007f08c5d17050 CR3=000000000c9b4000 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=2030343a31313a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a31313a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000