syzkaller login: [ 31.406502] BUG: Bad rss-counter state mm:0000000045280846 type:MM_FILEPAGES val:33 [ 31.407265] BUG: Bad rss-counter state mm:0000000045280846 type:MM_ANONPAGES val:22 [ 31.561214] ================================================================== [ 31.562259] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.563321] Read of size 8 at addr ffff8880146763f8 by task sshd/220 [ 31.564371] [ 31.564620] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.565642] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.566781] Call Trace: [ 31.567147] [ 31.567470] dump_stack_lvl+0x91/0xf0 [ 31.568056] print_report+0xcc/0x620 [ 31.568610] ? __virt_addr_valid+0x102/0x340 [ 31.569240] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.569947] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.570659] kasan_report+0xbe/0xf0 [ 31.571204] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.571927] vma_interval_tree_remove+0xc75/0xec0 [ 31.572617] vma_prepare+0xc54/0x11a0 [ 31.573165] __split_vma+0x5af/0x950 [ 31.573711] ? __pfx___split_vma+0x10/0x10 [ 31.574328] ? find_held_lock+0x2c/0x110 [ 31.574937] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.575579] ? lock_is_held_type+0x9f/0x120 [ 31.576228] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.576930] ? mtree_range_walk+0x632/0x900 [ 31.577570] ? mas_walk+0x5c7/0x7c0 [ 31.578110] do_vmi_munmap+0x1f1/0x2b0 [ 31.578675] mmap_region+0x1f9/0x2660 [ 31.579230] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.579837] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.580659] ? __pfx_lock_acquire+0x10/0x10 [ 31.581262] ? __pfx_mmap_region+0x10/0x10 [ 31.581890] ? security_mmap_addr+0x7d/0xa0 [ 31.582480] ? get_unmapped_area+0x1f5/0x3f0 [ 31.583115] do_mmap+0x854/0xf00 [ 31.583612] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.584199] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.584905] ksys_mmap_pgoff+0x3af/0x500 [ 31.585498] do_syscall_64+0x3f/0x90 [ 31.586027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.586761] RIP: 0033:0x7fe30362dd82 [ 31.587295] 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 [ 31.589707] RSP: 002b:00007ffdcda6e6c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.590733] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe30362dd82 [ 31.591724] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe302a67000 [ 31.592692] RBP: 00007fe302a67000 R08: 0000000000000009 R09: 0000000000001000 [ 31.593656] R10: 0000000000000812 R11: 0000000000000206 R12: 00005572a1cdfec0 [ 31.594642] R13: 00007ffdcda6e6e0 R14: 00007ffdcda6e710 R15: 00007ffdcda6ea70 [ 31.595759] [ 31.596150] [ 31.596405] Allocated by task 213: [ 31.596896] kasan_save_stack+0x22/0x50 [ 31.597475] kasan_set_track+0x25/0x30 [ 31.598038] __kasan_slab_alloc+0x59/0x70 [ 31.598615] kmem_cache_alloc+0x16b/0x370 [ 31.599201] vm_area_dup+0x20/0x160 [ 31.599712] __split_vma+0x170/0x950 [ 31.600227] split_vma+0xc6/0x110 [ 31.600724] mprotect_fixup+0x8d2/0xb30 [ 31.601285] do_mprotect_pkey+0x87e/0xd40 [ 31.601887] __x64_sys_mprotect+0x78/0xc0 [ 31.602482] do_syscall_64+0x3f/0x90 [ 31.603026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.603787] [ 31.604034] Freed by task 203: [ 31.604481] kasan_save_stack+0x22/0x50 [ 31.605123] kasan_set_track+0x25/0x30 [ 31.605690] kasan_save_free_info+0x2b/0x50 [ 31.606343] __kasan_slab_free+0x10a/0x190 [ 31.607089] kmem_cache_free+0x10d/0x4d0 [ 31.607672] rcu_core+0x8c8/0x2860 [ 31.608183] __do_softirq+0x1b7/0x7d4 [ 31.608734] [ 31.608978] Last potentially related work creation: [ 31.609667] kasan_save_stack+0x22/0x50 [ 31.610236] __kasan_record_aux_stack+0x8e/0xa0 [ 31.610895] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.611648] remove_vma+0x139/0x170 [ 31.612173] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.612798] do_vmi_munmap+0x1f1/0x2b0 [ 31.613340] __vm_munmap+0x138/0x3a0 [ 31.613858] __x64_sys_munmap+0x59/0x80 [ 31.614412] do_syscall_64+0x3f/0x90 [ 31.614940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.615687] [ 31.615932] The buggy address belongs to the object at ffff8880146763a0 [ 31.615932] which belongs to the cache vm_area_struct of size 168 [ 31.617684] The buggy address is located 88 bytes inside of [ 31.617684] freed 168-byte region [ffff8880146763a0, ffff888014676448) [ 31.619319] [ 31.619556] The buggy address belongs to the physical page: [ 31.620294] page:000000006230c5fe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14676 [ 31.621514] memcg:ffff88800f0fcb01 [ 31.621986] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.622701] page_type: 0xffffffff() [ 31.623203] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.624255] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0fcb01 [ 31.625259] page dumped because: kasan: bad access detected [ 31.625991] [ 31.626230] Memory state around the buggy address: [ 31.626880] ffff888014676280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.627849] ffff888014676300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.628936] >ffff888014676380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.630047] ^ [ 31.630977] ffff888014676400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.631943] ffff888014676480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.632886] ================================================================== [ 31.633984] Disabling lock debugging due to kernel taint [ 33.382876] BUG: Bad rss-counter state mm:000000004ea9d731 type:MM_FILEPAGES val:33 [ 33.383804] BUG: Bad rss-counter state mm:000000004ea9d731 type:MM_ANONPAGES val:22 [ 33.782187] BUG: Bad rss-counter state mm:00000000f24cf1cf type:MM_FILEPAGES val:33 [ 33.782876] BUG: Bad rss-counter state mm:00000000f24cf1cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63316' (ECDSA) to the list of known hosts. 2023/06/21 06:17:21 fuzzer started 2023/06/21 06:17:21 dialing manager at localhost:36067 2023/06/21 06:17:21 checking machine... 2023/06/21 06:17:21 checking revisions... [ 34.417720] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:17:21 testing simple program... [ 34.458593] cgroup: Unknown subsys name 'net' [ 34.499967] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:17:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c136d RSI=ffffffff8118ddc3 RDI=ffff88806ce09b68 RBP=0000000000000007 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800f3bd1c0 R15=ffff88800e0932e0 RIP=ffffffff813ad4be RFL=00000212 [----A--] 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 00007fef660ec900 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=0000560c16a57c28 CR3=000000000c51c000 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=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 info registers vcpu 1 RAX=1ffff11001973640 RBX=00007fef66096000 RCX=0000000000000000 RDX=ffff88800f3bd1c0 RSI=ffffffff8449b2ff RDI=0000000000000005 RBP=ffff88800cb9b200 RSP=ffff88800e0c7b20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800deca0e8 R13=dffffc0000000000 R14=ffff88800cb9b280 R15=ffff88800e0c7e70 RIP=ffffffff844a91ef 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 00007fef660ec900 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=00007fef6609b008 CR3=000000000c51c000 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