syzkaller login: [ 31.282640] sshd (213) used greatest stack depth: 24128 bytes left [ 31.284618] BUG: Bad rss-counter state mm:0000000044424dba type:MM_FILEPAGES val:33 [ 31.286484] BUG: Bad rss-counter state mm:0000000044424dba type:MM_ANONPAGES val:22 [ 31.440976] ================================================================== [ 31.441887] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.442828] Read of size 8 at addr ffff88800df423f8 by task sshd/220 [ 31.443597] [ 31.443815] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.444822] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.445812] Call Trace: [ 31.446131] [ 31.446411] dump_stack_lvl+0x91/0xf0 [ 31.446924] print_report+0xcc/0x620 [ 31.447410] ? __virt_addr_valid+0x102/0x340 [ 31.447964] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.448594] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.449213] kasan_report+0xbe/0xf0 [ 31.449689] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.450324] vma_interval_tree_remove+0xc75/0xec0 [ 31.450961] vma_prepare+0xc54/0x11a0 [ 31.451458] __split_vma+0x5af/0x950 [ 31.451946] ? __pfx___split_vma+0x10/0x10 [ 31.452522] ? find_held_lock+0x2c/0x110 [ 31.453064] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.453651] ? lock_is_held_type+0x9f/0x120 [ 31.454215] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.454836] ? mtree_range_walk+0x632/0x900 [ 31.455409] ? mas_walk+0x5c7/0x7c0 [ 31.455900] do_vmi_munmap+0x1f1/0x2b0 [ 31.456416] mmap_region+0x1f9/0x2660 [ 31.456923] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.457451] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.458194] ? __pfx_lock_acquire+0x10/0x10 [ 31.458741] ? __pfx_mmap_region+0x10/0x10 [ 31.459288] ? security_mmap_addr+0x7d/0xa0 [ 31.459839] ? get_unmapped_area+0x1f5/0x3f0 [ 31.460417] do_mmap+0x854/0xf00 [ 31.460868] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.461382] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.461967] ksys_mmap_pgoff+0x3af/0x500 [ 31.462486] do_syscall_64+0x3f/0x90 [ 31.462988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.463664] RIP: 0033:0x7f23ccb42d82 [ 31.464136] 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 [ 31.466365] RSP: 002b:00007ffc3a46d638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.467306] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f23ccb42d82 [ 31.468192] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f23cbf7c000 [ 31.469077] RBP: 00007f23cbf7c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.469952] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d6d98daec0 [ 31.470823] R13: 00007ffc3a46d650 R14: 00007ffc3a46d680 R15: 00007ffc3a46d9e0 [ 31.471713] [ 31.472017] [ 31.472237] Allocated by task 213: [ 31.472690] kasan_save_stack+0x22/0x50 [ 31.473210] kasan_set_track+0x25/0x30 [ 31.473724] __kasan_slab_alloc+0x59/0x70 [ 31.474271] kmem_cache_alloc+0x16b/0x370 [ 31.474812] vm_area_dup+0x20/0x160 [ 31.475285] __split_vma+0x170/0x950 [ 31.475767] split_vma+0xc6/0x110 [ 31.476226] mprotect_fixup+0x8d2/0xb30 [ 31.476769] do_mprotect_pkey+0x87e/0xd40 [ 31.477311] __x64_sys_mprotect+0x78/0xc0 [ 31.477852] do_syscall_64+0x3f/0x90 [ 31.478350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.479017] [ 31.479245] Freed by task 213: [ 31.479654] kasan_save_stack+0x22/0x50 [ 31.480175] kasan_set_track+0x25/0x30 [ 31.480690] kasan_save_free_info+0x2b/0x50 [ 31.481243] __kasan_slab_free+0x10a/0x190 [ 31.481794] kmem_cache_free+0x10d/0x4d0 [ 31.482326] rcu_core+0x8c8/0x2860 [ 31.482786] __do_softirq+0x1b7/0x7d4 [ 31.483287] [ 31.483509] Last potentially related work creation: [ 31.484121] kasan_save_stack+0x22/0x50 [ 31.484665] __kasan_record_aux_stack+0x8e/0xa0 [ 31.485266] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.486013] remove_vma+0x139/0x170 [ 31.486486] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.487070] do_vmi_munmap+0x1f1/0x2b0 [ 31.487574] __vm_munmap+0x138/0x3a0 [ 31.488057] __x64_sys_munmap+0x59/0x80 [ 31.488589] do_syscall_64+0x3f/0x90 [ 31.489084] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.489751] [ 31.489978] The buggy address belongs to the object at ffff88800df423a0 [ 31.489978] which belongs to the cache vm_area_struct of size 168 [ 31.491520] The buggy address is located 88 bytes inside of [ 31.491520] freed 168-byte region [ffff88800df423a0, ffff88800df42448) [ 31.493015] [ 31.493242] The buggy address belongs to the physical page: [ 31.493930] page:0000000069be77a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf42 [ 31.495087] memcg:ffff88800c6aea01 [ 31.495538] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.496215] page_type: 0xffffffff() [ 31.496693] raw: 0100000000000200 ffff8880087a0c80 ffffea00005b3f80 dead000000000002 [ 31.497659] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6aea01 [ 31.498601] page dumped because: kasan: bad access detected [ 31.499291] [ 31.499518] Memory state around the buggy address: [ 31.500133] ffff88800df42280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.501035] ffff88800df42300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.501938] >ffff88800df42380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.502820] ^ [ 31.503693] ffff88800df42400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.504600] ffff88800df42480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.505488] ================================================================== [ 31.506447] Disabling lock debugging due to kernel taint [ 33.963417] BUG: Bad rss-counter state mm:00000000699bf4c7 type:MM_FILEPAGES val:33 [ 33.964429] BUG: Bad rss-counter state mm:00000000699bf4c7 type:MM_ANONPAGES val:22 [ 34.485991] BUG: Bad rss-counter state mm:00000000ffe31c83 type:MM_FILEPAGES val:33 [ 34.486881] BUG: Bad rss-counter state mm:00000000ffe31c83 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39531' (ECDSA) to the list of known hosts. 2023/06/21 09:22:54 fuzzer started 2023/06/21 09:22:54 dialing manager at localhost:36067 2023/06/21 09:22:54 checking machine... 2023/06/21 09:22:54 checking revisions... [ 35.159533] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:22:54 testing simple program... [ 35.224240] cgroup: Unknown subsys name 'net' [ 35.287609] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:22:54 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff88800d9a3680 RSI=ffffffff83c12527 RDI=0000000000000005 RBP=ffff88800c52a000 RSP=ffff88801972f850 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff8880164c9180 R13=ffff88800c52a060 R14=0000000000000000 R15=ffff88800c52a274 RIP=ffffffff814c0871 RFL=00000282 [--S----] 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 00007fbbc6ed0700 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=00007fc47d6846d0 CR3=000000000c96c000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732034353a3232 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323537 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=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88800d84fe28 RSI=ffff88800d84fdf0 RDI=ffff88800d84f838 RBP=ffff88800d84f8c0 RSP=ffff88800d84f818 R8 =0000000000000001 R9 =ffff88800d84f868 R10=0000000000038001 R11=000000000001e45f R12=ffff88800d84f8f0 R13=0000000000000000 R14=ffff888015a9b680 R15=ffff88800d84f828 RIP=ffffffff81130937 RFL=00000296 [--S-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 00007fcd824e5900 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=00007fcd824c4020 CR3=00000000096ec000 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