syzkaller login: [ 31.144282] BUG: Bad rss-counter state mm:0000000057b2a313 type:MM_FILEPAGES val:33 [ 31.145490] BUG: Bad rss-counter state mm:0000000057b2a313 type:MM_ANONPAGES val:22 [ 31.185906] ================================================================== [ 31.186864] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.187808] Read of size 8 at addr ffff88801a10ba50 by task sshd/221 [ 31.188583] [ 31.188803] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.189673] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.190663] Call Trace: [ 31.190994] [ 31.191278] dump_stack_lvl+0x91/0xf0 [ 31.191779] print_report+0xcc/0x620 [ 31.192284] ? __virt_addr_valid+0x102/0x340 [ 31.192843] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.193465] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.194093] kasan_report+0xbe/0xf0 [ 31.194690] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.195308] vma_interval_tree_remove+0xc75/0xec0 [ 31.195928] vma_prepare+0xc54/0x11a0 [ 31.196420] __split_vma+0x5af/0x950 [ 31.196920] ? __pfx___split_vma+0x10/0x10 [ 31.197452] ? find_held_lock+0x2c/0x110 [ 31.197973] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.198540] ? lock_is_held_type+0x9f/0x120 [ 31.199084] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.199693] ? mtree_range_walk+0x632/0x900 [ 31.200297] ? mas_walk+0x5c7/0x7c0 [ 31.200772] do_vmi_munmap+0x1f1/0x2b0 [ 31.201268] mmap_region+0x1f9/0x2660 [ 31.201757] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.202269] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.202980] ? __pfx_lock_acquire+0x10/0x10 [ 31.203508] ? __pfx_mmap_region+0x10/0x10 [ 31.204051] ? security_mmap_addr+0x7d/0xa0 [ 31.204579] ? get_unmapped_area+0x1f5/0x3f0 [ 31.205119] do_mmap+0x854/0xf00 [ 31.205557] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.206049] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.206601] ksys_mmap_pgoff+0x3af/0x500 [ 31.207114] do_syscall_64+0x3f/0x90 [ 31.207602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.208260] RIP: 0033:0x7f9fe4721d82 [ 31.208717] 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 [ 31.210830] RSP: 002b:00007ffffa201de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.211727] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9fe4721d82 [ 31.212591] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9fe3b5b000 [ 31.213442] RBP: 00007f9fe3b5b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.214278] R10: 0000000000000812 R11: 0000000000000206 R12: 00005639a2927d90 [ 31.215113] R13: 00007ffffa201e00 R14: 00007ffffa201e30 R15: 00007ffffa202190 [ 31.215966] [ 31.216274] [ 31.216485] Allocated by task 214: [ 31.216907] kasan_save_stack+0x22/0x50 [ 31.217407] kasan_set_track+0x25/0x30 [ 31.217897] __kasan_slab_alloc+0x59/0x70 [ 31.218418] kmem_cache_alloc+0x16b/0x370 [ 31.218937] vm_area_dup+0x20/0x160 [ 31.219382] __split_vma+0x170/0x950 [ 31.219851] split_vma+0xc6/0x110 [ 31.220289] mprotect_fixup+0x8d2/0xb30 [ 31.220791] do_mprotect_pkey+0x87e/0xd40 [ 31.221314] __x64_sys_mprotect+0x78/0xc0 [ 31.221849] do_syscall_64+0x3f/0x90 [ 31.222326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.222967] [ 31.223185] Freed by task 19: [ 31.223566] kasan_save_stack+0x22/0x50 [ 31.224076] kasan_set_track+0x25/0x30 [ 31.224574] kasan_save_free_info+0x2b/0x50 [ 31.225099] __kasan_slab_free+0x10a/0x190 [ 31.225626] kmem_cache_free+0x10d/0x4d0 [ 31.226128] rcu_core+0x8c8/0x2860 [ 31.226571] __do_softirq+0x1b7/0x7d4 [ 31.227052] [ 31.227268] Last potentially related work creation: [ 31.227852] kasan_save_stack+0x22/0x50 [ 31.228360] __kasan_record_aux_stack+0x8e/0xa0 [ 31.228931] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.229582] remove_vma+0x139/0x170 [ 31.230031] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.230586] do_vmi_munmap+0x1f1/0x2b0 [ 31.231073] __vm_munmap+0x138/0x3a0 [ 31.231545] __x64_sys_munmap+0x59/0x80 [ 31.232063] do_syscall_64+0x3f/0x90 [ 31.232540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.233181] [ 31.233395] The buggy address belongs to the object at ffff88801a10b9f8 [ 31.233395] which belongs to the cache vm_area_struct of size 168 [ 31.234844] The buggy address is located 88 bytes inside of [ 31.234844] freed 168-byte region [ffff88801a10b9f8, ffff88801a10baa0) [ 31.236263] [ 31.236477] The buggy address belongs to the physical page: [ 31.237128] page:00000000366c520a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a10b [ 31.238210] memcg:ffff88800f096d01 [ 31.238632] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.239269] page_type: 0xffffffff() [ 31.239716] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.240647] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f096d01 [ 31.241541] page dumped because: kasan: bad access detected [ 31.242199] [ 31.242412] Memory state around the buggy address: [ 31.242988] ffff88801a10b900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.243865] ffff88801a10b980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.244736] >ffff88801a10ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.245592] ^ [ 31.246294] ffff88801a10ba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.247152] ffff88801a10bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.248005] ================================================================== [ 31.249143] Disabling lock debugging due to kernel taint [ 32.885405] BUG: Bad rss-counter state mm:0000000092e59dd9 type:MM_FILEPAGES val:33 [ 32.886382] BUG: Bad rss-counter state mm:0000000092e59dd9 type:MM_ANONPAGES val:22 [ 33.369170] BUG: Bad rss-counter state mm:00000000ca8fb804 type:MM_FILEPAGES val:33 [ 33.370344] BUG: Bad rss-counter state mm:00000000ca8fb804 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20475' (ECDSA) to the list of known hosts. 2023/06/21 04:42:11 fuzzer started 2023/06/21 04:42:11 dialing manager at localhost:36067 2023/06/21 04:42:11 checking machine... 2023/06/21 04:42:11 checking revisions... [ 34.105921] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:42:11 testing simple program... [ 34.157253] cgroup: Unknown subsys name 'net' [ 34.216838] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:42:10 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffffffff0912778 RSI=ffffffff813c93b9 RDI=ffffffff84893bc0 RBP=ffff888019054ac0 RSP=ffff8880165a7b18 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=ffff88800c482650 R13=ffff88800df20a00 R14=ffff8880165a7c48 R15=0000000000000053 RIP=ffffffff813c93d6 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 00007f38a8b25900 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=00007f38a90da650 CR3=000000000eb32000 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=0000000000000000 RBX=0000000000000001 RCX=ffffffff861d1a5a RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff861d1a5e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000003a4e3 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88801469f7e8 R15=ffff88806cf09a98 RIP=ffffffff81130bb0 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 00007f9e83aa7900 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=00007f9e82f3d0d0 CR3=000000000c67e000 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=00000000000000000000000000000000 XMM01=11b3993ec31a9fabac4326f86e37a839 XMM02=000000000011d270eff9b2d0a8fce9cb XMM03=000000000011d3402c67c8bc2e329bc3 XMM04=1178aed10e8e767a00000000000ae988 XMM05=d551f577068f5a620000000000132880 XMM06=c291bd5c70af25b90000000000131670 XMM07=fb795ef6d657705600000000001219a8 XMM08=2c67c8bc2e329bc3000000000011d2e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000