syzkaller login: [ 30.634713] BUG: Bad rss-counter state mm:00000000781d257f type:MM_FILEPAGES val:33 [ 30.635933] BUG: Bad rss-counter state mm:00000000781d257f type:MM_ANONPAGES val:22 [ 30.776502] ================================================================== [ 30.777460] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.778397] Read of size 8 at addr ffff88801686aed8 by task sshd/221 [ 30.779168] [ 30.779388] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.780453] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.781455] Call Trace: [ 30.781776] [ 30.782062] dump_stack_lvl+0x91/0xf0 [ 30.782574] print_report+0xcc/0x620 [ 30.783060] ? __virt_addr_valid+0x102/0x340 [ 30.783619] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.784248] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.784867] kasan_report+0xbe/0xf0 [ 30.785355] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.785982] vma_interval_tree_remove+0xc75/0xec0 [ 30.786582] vma_prepare+0xc54/0x11a0 [ 30.787062] __split_vma+0x5af/0x950 [ 30.787544] ? __pfx___split_vma+0x10/0x10 [ 30.788078] ? find_held_lock+0x2c/0x110 [ 30.788603] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.789170] ? lock_is_held_type+0x9f/0x120 [ 30.789738] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.790347] ? mtree_range_walk+0x632/0x900 [ 30.790900] ? mas_walk+0x5c7/0x7c0 [ 30.791376] do_vmi_munmap+0x1f1/0x2b0 [ 30.791873] mmap_region+0x1f9/0x2660 [ 30.792351] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.792868] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.793602] ? __pfx_lock_acquire+0x10/0x10 [ 30.794138] ? __pfx_mmap_region+0x10/0x10 [ 30.794668] ? security_mmap_addr+0x7d/0xa0 [ 30.795220] ? get_unmapped_area+0x1f5/0x3f0 [ 30.795771] do_mmap+0x854/0xf00 [ 30.796219] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.796718] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.797307] ksys_mmap_pgoff+0x3af/0x500 [ 30.797830] do_syscall_64+0x3f/0x90 [ 30.798321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.798986] RIP: 0033:0x7f565467dd82 [ 30.799459] 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 [ 30.801594] RSP: 002b:00007fff298975d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.802503] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f565467dd82 [ 30.803350] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5653ab7000 [ 30.804203] RBP: 00007f5653ab7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.805060] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f014d7eec0 [ 30.805938] R13: 00007fff298975f0 R14: 00007fff29897620 R15: 00007fff29897980 [ 30.806807] [ 30.807100] [ 30.807316] Allocated by task 214: [ 30.807761] kasan_save_stack+0x22/0x50 [ 30.808279] kasan_set_track+0x25/0x30 [ 30.808780] __kasan_slab_alloc+0x59/0x70 [ 30.809315] kmem_cache_alloc+0x16b/0x370 [ 30.809831] vm_area_dup+0x20/0x160 [ 30.810294] __split_vma+0x170/0x950 [ 30.810771] split_vma+0xc6/0x110 [ 30.811217] mprotect_fixup+0x8d2/0xb30 [ 30.811728] do_mprotect_pkey+0x87e/0xd40 [ 30.812258] __x64_sys_mprotect+0x78/0xc0 [ 30.812792] do_syscall_64+0x3f/0x90 [ 30.813283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.813945] [ 30.814159] Freed by task 214: [ 30.814555] kasan_save_stack+0x22/0x50 [ 30.815070] kasan_set_track+0x25/0x30 [ 30.815559] kasan_save_free_info+0x2b/0x50 [ 30.816103] __kasan_slab_free+0x10a/0x190 [ 30.816644] kmem_cache_free+0x10d/0x4d0 [ 30.817161] rcu_core+0x8c8/0x2860 [ 30.817641] __do_softirq+0x1b7/0x7d4 [ 30.818120] [ 30.818334] Last potentially related work creation: [ 30.818927] kasan_save_stack+0x22/0x50 [ 30.819436] __kasan_record_aux_stack+0x8e/0xa0 [ 30.820018] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.820679] remove_vma+0x139/0x170 [ 30.821135] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.821724] do_vmi_munmap+0x1f1/0x2b0 [ 30.822212] __vm_munmap+0x138/0x3a0 [ 30.822691] __x64_sys_munmap+0x59/0x80 [ 30.823193] do_syscall_64+0x3f/0x90 [ 30.823682] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.824330] [ 30.824551] The buggy address belongs to the object at ffff88801686ae80 [ 30.824551] which belongs to the cache vm_area_struct of size 168 [ 30.826041] The buggy address is located 88 bytes inside of [ 30.826041] freed 168-byte region [ffff88801686ae80, ffff88801686af28) [ 30.827457] [ 30.827673] The buggy address belongs to the physical page: [ 30.828336] page:00000000b3259aea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1686a [ 30.829455] memcg:ffff88801026a701 [ 30.829887] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.830538] page_type: 0xffffffff() [ 30.830994] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.831911] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801026a701 [ 30.832811] page dumped because: kasan: bad access detected [ 30.833481] [ 30.833696] Memory state around the buggy address: [ 30.834283] ffff88801686ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.835153] ffff88801686ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.836023] >ffff88801686ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.836875] ^ [ 30.837608] ffff88801686af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.838472] ffff88801686af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.839333] ================================================================== [ 30.840536] Disabling lock debugging due to kernel taint [ 33.004425] BUG: Bad rss-counter state mm:00000000cf5920fd type:MM_FILEPAGES val:33 [ 33.006129] BUG: Bad rss-counter state mm:00000000cf5920fd type:MM_ANONPAGES val:22 [ 33.514712] BUG: Bad rss-counter state mm:00000000fe85e490 type:MM_FILEPAGES val:33 [ 33.516522] BUG: Bad rss-counter state mm:00000000fe85e490 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6906' (ECDSA) to the list of known hosts. 2023/06/21 07:08:33 fuzzer started 2023/06/21 07:08:33 dialing manager at localhost:36067 2023/06/21 07:08:33 checking machine... 2023/06/21 07:08:33 checking revisions... [ 34.288061] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:08:34 testing simple program... [ 34.337212] cgroup: Unknown subsys name 'net' [ 34.385169] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:08:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff110033a7e7a RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff888019d3f3b8 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180fea8 RFL=00000256 [---ZAP-] 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 00007fa26fa0b700 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=00007f30663d6e80 CR3=000000000d99c000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36383932352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363839 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000003 RCX=0000000000000000 RDX=ffff888010299b40 RSI=ffffffff84e39bc0 RDI=0000000000000003 RBP=ffff88800e9f9650 RSP=ffff88801750ee60 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000003 R11=ffff8880097dd81c R12=0000000000000002 R13=0000000000000000 R14=dffffc0000000000 R15=ffff88801750ef20 RIP=ffffffff814c046a RFL=00000293 [--S-A-C] 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 00007f2b28d48900 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=00007f2b28d0d008 CR3=0000000015d6c000 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