syzkaller login: [ 31.108909] BUG: Bad rss-counter state mm:00000000bc4355b8 type:MM_FILEPAGES val:33 [ 31.110128] BUG: Bad rss-counter state mm:00000000bc4355b8 type:MM_ANONPAGES val:22 [ 31.149787] ================================================================== [ 31.150746] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.151670] Read of size 8 at addr ffff88800ee665c8 by task sshd/219 [ 31.152459] [ 31.152676] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.153528] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.154495] Call Trace: [ 31.154811] [ 31.155090] dump_stack_lvl+0x91/0xf0 [ 31.155577] print_report+0xcc/0x620 [ 31.156069] ? __virt_addr_valid+0x102/0x340 [ 31.156611] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.157223] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.157833] kasan_report+0xbe/0xf0 [ 31.158309] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.158925] vma_interval_tree_remove+0xc75/0xec0 [ 31.159528] vma_prepare+0xc54/0x11a0 [ 31.160007] __split_vma+0x5af/0x950 [ 31.160467] ? __pfx___split_vma+0x10/0x10 [ 31.160968] ? find_held_lock+0x2c/0x110 [ 31.161479] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.162044] ? lock_is_held_type+0x9f/0x120 [ 31.162582] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.163194] ? mtree_range_walk+0x632/0x900 [ 31.163768] ? mas_walk+0x5c7/0x7c0 [ 31.164254] do_vmi_munmap+0x1f1/0x2b0 [ 31.164747] mmap_region+0x1f9/0x2660 [ 31.165228] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.165740] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.166454] ? __pfx_lock_acquire+0x10/0x10 [ 31.166989] ? __pfx_mmap_region+0x10/0x10 [ 31.167509] ? security_mmap_addr+0x7d/0xa0 [ 31.168049] ? get_unmapped_area+0x1f5/0x3f0 [ 31.168599] do_mmap+0x854/0xf00 [ 31.169043] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.169537] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.170099] ksys_mmap_pgoff+0x3af/0x500 [ 31.170604] do_syscall_64+0x3f/0x90 [ 31.171073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.171682] RIP: 0033:0x7f1e202d8d82 [ 31.172126] 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 [ 31.174132] RSP: 002b:00007ffcb7925d38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.175116] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e202d8d82 [ 31.175934] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e1f712000 [ 31.176735] RBP: 00007f1e1f712000 R08: 0000000000000009 R09: 0000000000001000 [ 31.177538] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e8576d9f70 [ 31.178326] R13: 00007ffcb7925d50 R14: 00007ffcb7925d80 R15: 00007ffcb79260e0 [ 31.179137] [ 31.179413] [ 31.179618] Allocated by task 212: [ 31.180030] kasan_save_stack+0x22/0x50 [ 31.180505] kasan_set_track+0x25/0x30 [ 31.180969] __kasan_slab_alloc+0x59/0x70 [ 31.181467] kmem_cache_alloc+0x16b/0x370 [ 31.181956] vm_area_dup+0x20/0x160 [ 31.182392] __split_vma+0x170/0x950 [ 31.182834] split_vma+0xc6/0x110 [ 31.183255] mprotect_fixup+0x8d2/0xb30 [ 31.183749] do_mprotect_pkey+0x87e/0xd40 [ 31.184245] __x64_sys_mprotect+0x78/0xc0 [ 31.184736] do_syscall_64+0x3f/0x90 [ 31.185186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.185790] [ 31.185997] Freed by task 212: [ 31.186370] kasan_save_stack+0x22/0x50 [ 31.186850] kasan_set_track+0x25/0x30 [ 31.187322] kasan_save_free_info+0x2b/0x50 [ 31.187848] __kasan_slab_free+0x10a/0x190 [ 31.188372] kmem_cache_free+0x10d/0x4d0 [ 31.188868] rcu_core+0x8c8/0x2860 [ 31.189295] __do_softirq+0x1b7/0x7d4 [ 31.189754] [ 31.189962] Last potentially related work creation: [ 31.190538] kasan_save_stack+0x22/0x50 [ 31.191031] __kasan_record_aux_stack+0x8e/0xa0 [ 31.191596] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.192241] remove_vma+0x139/0x170 [ 31.192678] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.193205] do_vmi_munmap+0x1f1/0x2b0 [ 31.193679] __vm_munmap+0x138/0x3a0 [ 31.194143] __x64_sys_munmap+0x59/0x80 [ 31.194626] do_syscall_64+0x3f/0x90 [ 31.195101] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.195749] [ 31.195967] Second to last potentially related work creation: [ 31.196639] kasan_save_stack+0x22/0x50 [ 31.197143] __kasan_record_aux_stack+0x8e/0xa0 [ 31.197716] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.198349] remove_vma+0x139/0x170 [ 31.198781] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.199332] do_vmi_munmap+0x1f1/0x2b0 [ 31.199818] mmap_region+0x1f9/0x2660 [ 31.200296] do_mmap+0x854/0xf00 [ 31.200710] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.201174] ksys_mmap_pgoff+0x7d/0x500 [ 31.201655] do_syscall_64+0x3f/0x90 [ 31.202103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.202725] [ 31.202933] The buggy address belongs to the object at ffff88800ee66570 [ 31.202933] which belongs to the cache vm_area_struct of size 168 [ 31.204323] The buggy address is located 88 bytes inside of [ 31.204323] freed 168-byte region [ffff88800ee66570, ffff88800ee66618) [ 31.205719] [ 31.205939] The buggy address belongs to the physical page: [ 31.206595] page:00000000a35bc172 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800ee66000 pfn:0xee66 [ 31.207801] memcg:ffff888014549001 [ 31.208214] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.208844] page_type: 0xffffffff() [ 31.209296] raw: 0100000000000200 ffff88800879fc80 ffffea00003ba950 ffffea00003b9510 [ 31.210190] raw: ffff88800ee66000 000000000011000d 00000001ffffffff ffff888014549001 [ 31.211073] page dumped because: kasan: bad access detected [ 31.211722] [ 31.211947] Memory state around the buggy address: [ 31.212510] ffff88800ee66480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.213352] ffff88800ee66500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.214186] >ffff88800ee66580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.215011] ^ [ 31.215673] ffff88800ee66600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.216519] ffff88800ee66680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.217357] ================================================================== [ 31.218469] Disabling lock debugging due to kernel taint [ 32.539930] BUG: Bad rss-counter state mm:00000000a00f61fd type:MM_FILEPAGES val:33 [ 32.540539] BUG: Bad rss-counter state mm:00000000a00f61fd type:MM_ANONPAGES val:22 [ 32.921819] BUG: Bad rss-counter state mm:0000000049641b93 type:MM_FILEPAGES val:33 [ 32.923022] BUG: Bad rss-counter state mm:0000000049641b93 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58142' (ECDSA) to the list of known hosts. 2023/06/20 07:28:55 fuzzer started 2023/06/20 07:28:55 dialing manager at localhost:44161 2023/06/20 07:28:55 checking machine... 2023/06/20 07:28:55 checking revisions... [ 33.414625] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:28:55 testing simple program... [ 33.464190] cgroup: Unknown subsys name 'net' [ 33.499955] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:28:54 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff864bb02e RDX=0000000000000002 RSI=0000000000000000 RDI=ffff88800f707838 RBP=ffff88806ce09ada RSP=ffff88806ce09a28 R8 =ffffffff864bb032 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88800f707818 R13=ffff88806ce09ae0 R14=ffff88800f707818 R15=ffff88806ce09a98 RIP=ffffffff81131eec RFL=00000202 [-------] 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 00007f2188f43700 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=00007f8ca64b8020 CR3=000000000cb5c000 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=2035353a38323a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a38323a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11003933ede RSI=ffffffff844c1db1 RDI=ffff88801c99f6b0 RBP=ffff88801c99f708 RSP=ffff88801c99f640 R8 =0000000000000001 R9 =ffff88801c99f6f0 R10=0000000000038001 R11=00000000000b3ca0 R12=ffff88801c99f710 R13=ffff88801c99f6f8 R14=ffff88801c99f6f1 R15=ffff88801c99f6b0 RIP=ffffffff811306da RFL=00000216 [----AP-] 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 00007f8ca64d9900 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=00007f8ca64a3008 CR3=000000000ebac000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000