syzkaller login: [ 38.579054] BUG: Bad rss-counter state mm:00000000e7606d69 type:MM_FILEPAGES val:33 [ 38.580326] BUG: Bad rss-counter state mm:00000000e7606d69 type:MM_ANONPAGES val:22 [ 38.754067] ================================================================== [ 38.755240] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.756502] Read of size 8 at addr ffff88800c98cb38 by task sshd/218 [ 38.757293] [ 38.757513] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.758403] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.759406] Call Trace: [ 38.759746] [ 38.760039] dump_stack_lvl+0x91/0xf0 [ 38.760551] print_report+0xcc/0x620 [ 38.761030] ? __virt_addr_valid+0x102/0x340 [ 38.761608] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.762223] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.762859] kasan_report+0xbe/0xf0 [ 38.763334] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.763979] vma_interval_tree_remove+0xc75/0xec0 [ 38.764599] vma_prepare+0xc54/0x11a0 [ 38.765074] __split_vma+0x5af/0x950 [ 38.765559] ? __pfx___split_vma+0x10/0x10 [ 38.766091] ? find_held_lock+0x2c/0x110 [ 38.766636] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.767199] ? lock_is_held_type+0x9f/0x120 [ 38.767803] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.768405] ? mtree_range_walk+0x632/0x900 [ 38.768987] ? mas_walk+0x5c7/0x7c0 [ 38.769456] do_vmi_munmap+0x1f1/0x2b0 [ 38.769965] mmap_region+0x1f9/0x2660 [ 38.770440] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.770959] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.771705] ? __pfx_lock_acquire+0x10/0x10 [ 38.772255] ? __pfx_mmap_region+0x10/0x10 [ 38.772791] ? security_mmap_addr+0x7d/0xa0 [ 38.773318] ? get_unmapped_area+0x1f5/0x3f0 [ 38.773875] do_mmap+0x854/0xf00 [ 38.774314] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.774819] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.775382] ksys_mmap_pgoff+0x3af/0x500 [ 38.775930] do_syscall_64+0x3f/0x90 [ 38.776409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.777066] RIP: 0033:0x7f972fea7d82 [ 38.777541] 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 [ 38.779692] RSP: 002b:00007ffe1b4fb5a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.780608] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f972fea7d82 [ 38.781450] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f972f2e1000 [ 38.782299] RBP: 00007f972f2e1000 R08: 0000000000000009 R09: 0000000000001000 [ 38.783156] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e4c9bf9ec0 [ 38.784045] R13: 00007ffe1b4fb5c0 R14: 00007ffe1b4fb5f0 R15: 00007ffe1b4fb950 [ 38.784919] [ 38.785207] [ 38.785419] Allocated by task 211: [ 38.785863] kasan_save_stack+0x22/0x50 [ 38.786364] kasan_set_track+0x25/0x30 [ 38.786864] __kasan_slab_alloc+0x59/0x70 [ 38.787383] kmem_cache_alloc+0x16b/0x370 [ 38.787924] vm_area_dup+0x20/0x160 [ 38.788371] __split_vma+0x170/0x950 [ 38.788843] split_vma+0xc6/0x110 [ 38.789282] mprotect_fixup+0x8d2/0xb30 [ 38.789797] do_mprotect_pkey+0x87e/0xd40 [ 38.790317] __x64_sys_mprotect+0x78/0xc0 [ 38.790845] do_syscall_64+0x3f/0x90 [ 38.791321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.792000] [ 38.792217] Freed by task 19: [ 38.792608] kasan_save_stack+0x22/0x50 [ 38.793110] kasan_set_track+0x25/0x30 [ 38.793614] kasan_save_free_info+0x2b/0x50 [ 38.794146] __kasan_slab_free+0x10a/0x190 [ 38.794687] kmem_cache_free+0x10d/0x4d0 [ 38.795192] rcu_core+0x8c8/0x2860 [ 38.795659] __do_softirq+0x1b7/0x7d4 [ 38.796154] [ 38.796367] Last potentially related work creation: [ 38.796954] kasan_save_stack+0x22/0x50 [ 38.797461] __kasan_record_aux_stack+0x8e/0xa0 [ 38.798051] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.798704] remove_vma+0x139/0x170 [ 38.799149] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.799723] do_vmi_munmap+0x1f1/0x2b0 [ 38.800224] __vm_munmap+0x138/0x3a0 [ 38.800710] __x64_sys_munmap+0x59/0x80 [ 38.801204] do_syscall_64+0x3f/0x90 [ 38.801691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.802333] [ 38.802556] The buggy address belongs to the object at ffff88800c98cae0 [ 38.802556] which belongs to the cache vm_area_struct of size 168 [ 38.804052] The buggy address is located 88 bytes inside of [ 38.804052] freed 168-byte region [ffff88800c98cae0, ffff88800c98cb88) [ 38.805484] [ 38.805713] The buggy address belongs to the physical page: [ 38.806369] page:00000000e268944f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc98c [ 38.807461] memcg:ffff88800ee66801 [ 38.807938] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.808597] page_type: 0xffffffff() [ 38.809049] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.809977] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee66801 [ 38.810895] page dumped because: kasan: bad access detected [ 38.811571] [ 38.811799] Memory state around the buggy address: [ 38.812384] ffff88800c98ca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.813260] ffff88800c98ca80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.814122] >ffff88800c98cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.814977] ^ [ 38.815614] ffff88800c98cb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.816466] ffff88800c98cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.817332] ================================================================== [ 38.818329] Disabling lock debugging due to kernel taint [ 41.487070] BUG: Bad rss-counter state mm:00000000ada177e3 type:MM_FILEPAGES val:33 [ 41.488048] BUG: Bad rss-counter state mm:00000000ada177e3 type:MM_ANONPAGES val:22 [ 42.103234] BUG: Bad rss-counter state mm:00000000b83e02a8 type:MM_FILEPAGES val:33 [ 42.104699] BUG: Bad rss-counter state mm:00000000b83e02a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4356' (ECDSA) to the list of known hosts. 2023/06/20 13:13:54 fuzzer started 2023/06/20 13:13:54 dialing manager at localhost:36067 2023/06/20 13:13:54 checking machine... 2023/06/20 13:13:54 checking revisions... [ 42.865804] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:13:54 testing simple program... [ 42.919291] cgroup: Unknown subsys name 'net' [ 42.974431] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:13:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008d7f9c8 RCX=0000000000000000 RDX=0000000000000002 RSI=ffffffff844f63dd RDI=ffff888008d7f9da RBP=0000000000000000 RSP=ffff888008d7f928 R8 =0000000000000007 R9 =0000000000000002 R10=0000000000000002 R11=0000000000000128 R12=ffff88801ad46680 R13=ffff88800895b9c2 R14=0000000000000002 R15=ffff88801ac1b668 RIP=ffffffff844f6402 RFL=00000046 [---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 0000000000000000 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=00007fff1600e628 CR3=000000001bf02000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffea00006d9840 RCX=0000000000000000 RDX=ffff88800fdf51c0 RSI=ffffffff817641f0 RDI=0000000000000007 RBP=ffffea00006a2008 RSP=ffff88800fc5fbc0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800f0f4828 R13=0000000000000000 R14=ffff88800db5dbb0 R15=ffffea00006d9874 RIP=ffffffff814c0864 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fde60f05900 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=00007fde61aa7968 CR3=000000001bf02000 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=6720646572637465733a4d41503d706f 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