syzkaller login: [ 30.983779] BUG: Bad rss-counter state mm:000000008cd1530e type:MM_FILEPAGES val:33 [ 30.985499] BUG: Bad rss-counter state mm:000000008cd1530e type:MM_ANONPAGES val:22 [ 31.151823] ================================================================== [ 31.152931] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.154033] Read of size 8 at addr ffff8880183fd798 by task sshd/221 [ 31.155103] [ 31.155340] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.156216] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.157201] Call Trace: [ 31.157518] [ 31.157816] dump_stack_lvl+0x91/0xf0 [ 31.158308] print_report+0xcc/0x620 [ 31.158807] ? __virt_addr_valid+0x102/0x340 [ 31.159352] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.159968] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.160600] kasan_report+0xbe/0xf0 [ 31.161084] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.161708] vma_interval_tree_remove+0xc75/0xec0 [ 31.162317] vma_prepare+0xc54/0x11a0 [ 31.162817] __split_vma+0x5af/0x950 [ 31.163288] ? __pfx___split_vma+0x10/0x10 [ 31.163829] ? find_held_lock+0x2c/0x110 [ 31.164345] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.164917] ? lock_is_held_type+0x9f/0x120 [ 31.165463] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.166074] ? mtree_range_walk+0x632/0x900 [ 31.166651] ? mas_walk+0x5c7/0x7c0 [ 31.167131] do_vmi_munmap+0x1f1/0x2b0 [ 31.167623] mmap_region+0x1f9/0x2660 [ 31.168109] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.168630] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.169351] ? __pfx_lock_acquire+0x10/0x10 [ 31.169884] ? __pfx_mmap_region+0x10/0x10 [ 31.170424] ? security_mmap_addr+0x7d/0xa0 [ 31.170985] ? get_unmapped_area+0x1f5/0x3f0 [ 31.171538] do_mmap+0x854/0xf00 [ 31.171983] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.172483] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.173054] ksys_mmap_pgoff+0x3af/0x500 [ 31.173565] do_syscall_64+0x3f/0x90 [ 31.174045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.174701] RIP: 0033:0x7f161ee21d82 [ 31.175164] 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 [ 31.177318] RSP: 002b:00007ffea75ed4c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.178229] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f161ee21d82 [ 31.179100] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f161e25b000 [ 31.179956] RBP: 00007f161e25b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.180802] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ac91913ec0 [ 31.181646] R13: 00007ffea75ed4e0 R14: 00007ffea75ed510 R15: 00007ffea75ed870 [ 31.182511] [ 31.182826] [ 31.183044] Allocated by task 214: [ 31.183475] kasan_save_stack+0x22/0x50 [ 31.183978] kasan_set_track+0x25/0x30 [ 31.184472] __kasan_slab_alloc+0x59/0x70 [ 31.184998] kmem_cache_alloc+0x16b/0x370 [ 31.185521] vm_area_dup+0x20/0x160 [ 31.185981] __split_vma+0x170/0x950 [ 31.186449] split_vma+0xc6/0x110 [ 31.186899] mprotect_fixup+0x8d2/0xb30 [ 31.187407] do_mprotect_pkey+0x87e/0xd40 [ 31.187927] __x64_sys_mprotect+0x78/0xc0 [ 31.188450] do_syscall_64+0x3f/0x90 [ 31.188927] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.189567] [ 31.189785] Freed by task 214: [ 31.190175] kasan_save_stack+0x22/0x50 [ 31.190687] kasan_set_track+0x25/0x30 [ 31.191179] kasan_save_free_info+0x2b/0x50 [ 31.191713] __kasan_slab_free+0x10a/0x190 [ 31.192241] kmem_cache_free+0x10d/0x4d0 [ 31.192752] rcu_core+0x8c8/0x2860 [ 31.193197] __do_softirq+0x1b7/0x7d4 [ 31.193672] [ 31.193888] Last potentially related work creation: [ 31.194483] kasan_save_stack+0x22/0x50 [ 31.195056] __kasan_record_aux_stack+0x8e/0xa0 [ 31.195658] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.196308] remove_vma+0x139/0x170 [ 31.196766] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.197325] do_vmi_munmap+0x1f1/0x2b0 [ 31.197812] __vm_munmap+0x138/0x3a0 [ 31.198283] __x64_sys_munmap+0x59/0x80 [ 31.198789] do_syscall_64+0x3f/0x90 [ 31.199266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.199910] [ 31.200125] The buggy address belongs to the object at ffff8880183fd740 [ 31.200125] which belongs to the cache vm_area_struct of size 168 [ 31.201587] The buggy address is located 88 bytes inside of [ 31.201587] freed 168-byte region [ffff8880183fd740, ffff8880183fd7e8) [ 31.203006] [ 31.203221] The buggy address belongs to the physical page: [ 31.203880] page:00000000e06ae1ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x183fd [ 31.204977] memcg:ffff888015a7b201 [ 31.205405] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.206055] page_type: 0xffffffff() [ 31.206506] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.207436] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a7b201 [ 31.208341] page dumped because: kasan: bad access detected [ 31.209007] [ 31.209222] Memory state around the buggy address: [ 31.209800] ffff8880183fd680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.210664] ffff8880183fd700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.211525] >ffff8880183fd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.212381] ^ [ 31.212886] ffff8880183fd800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.213758] ffff8880183fd880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.214619] ================================================================== [ 31.215572] Disabling lock debugging due to kernel taint [ 33.241539] BUG: Bad rss-counter state mm:0000000000302f44 type:MM_FILEPAGES val:33 [ 33.242490] BUG: Bad rss-counter state mm:0000000000302f44 type:MM_ANONPAGES val:22 [ 33.685941] BUG: Bad rss-counter state mm:00000000f1dc7035 type:MM_FILEPAGES val:33 [ 33.686961] BUG: Bad rss-counter state mm:00000000f1dc7035 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19048' (ECDSA) to the list of known hosts. 2023/06/21 02:08:13 fuzzer started 2023/06/21 02:08:13 dialing manager at localhost:36067 2023/06/21 02:08:14 checking machine... 2023/06/21 02:08:14 checking revisions... [ 34.383890] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:08:14 testing simple program... [ 34.426945] cgroup: Unknown subsys name 'net' [ 34.467119] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:08:13 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864bce2c RDX=ffffffff814c0250 RSI=1ffff1100d9c1355 RDI=ffff88800b3cfa00 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =ffffffff864bce30 R9 =ffff88806ce09a90 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88800b3cf968 R15=ffff88806ce09a50 RIP=ffffffff81131844 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 00007fba2655d900 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=00007fba26b150b0 CR3=000000000f328000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007efde9734890 CR3=000000000da0e000 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=2033313a38303a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a38303a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000