syzkaller login: [ 31.211743] BUG: Bad rss-counter state mm:00000000b35f2b21 type:MM_FILEPAGES val:33 [ 31.212847] BUG: Bad rss-counter state mm:00000000b35f2b21 type:MM_ANONPAGES val:22 [ 31.251554] ================================================================== [ 31.252409] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.253300] Read of size 8 at addr ffff88800ea79ed8 by task sshd/221 [ 31.254152] [ 31.254359] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.255165] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.256130] Call Trace: [ 31.256436] [ 31.256708] dump_stack_lvl+0x91/0xf0 [ 31.257172] print_report+0xcc/0x620 [ 31.257635] ? __virt_addr_valid+0x102/0x340 [ 31.258159] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.258742] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.259334] kasan_report+0xbe/0xf0 [ 31.259899] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.260642] vma_interval_tree_remove+0xc75/0xec0 [ 31.261362] vma_prepare+0xc54/0x11a0 [ 31.261935] __split_vma+0x5af/0x950 [ 31.262502] ? __pfx___split_vma+0x10/0x10 [ 31.263139] ? find_held_lock+0x2c/0x110 [ 31.263781] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.264463] ? lock_is_held_type+0x9f/0x120 [ 31.265112] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.265846] ? mtree_range_walk+0x632/0x900 [ 31.266517] ? mas_walk+0x5c7/0x7c0 [ 31.267089] do_vmi_munmap+0x1f1/0x2b0 [ 31.267701] mmap_region+0x1f9/0x2660 [ 31.268284] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.268901] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.269764] ? __pfx_lock_acquire+0x10/0x10 [ 31.270407] ? __pfx_mmap_region+0x10/0x10 [ 31.271045] ? security_mmap_addr+0x7d/0xa0 [ 31.271695] ? get_unmapped_area+0x1f5/0x3f0 [ 31.272357] do_mmap+0x854/0xf00 [ 31.272889] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.273484] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.274159] ksys_mmap_pgoff+0x3af/0x500 [ 31.274774] do_syscall_64+0x3f/0x90 [ 31.275355] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.276123] RIP: 0033:0x7f83412b5d82 [ 31.276677] 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 [ 31.279283] RSP: 002b:00007ffd6c19db68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.280381] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f83412b5d82 [ 31.281405] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f83406ef000 [ 31.282433] RBP: 00007f83406ef000 R08: 0000000000000009 R09: 0000000000001000 [ 31.283463] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f9aabd2ec0 [ 31.284489] R13: 00007ffd6c19db80 R14: 00007ffd6c19dbb0 R15: 00007ffd6c19df10 [ 31.285526] [ 31.285877] [ 31.286134] Allocated by task 214: [ 31.286652] kasan_save_stack+0x22/0x50 [ 31.287275] kasan_set_track+0x25/0x30 [ 31.287875] __kasan_slab_alloc+0x59/0x70 [ 31.288509] kmem_cache_alloc+0x16b/0x370 [ 31.289133] vm_area_dup+0x20/0x160 [ 31.289681] __split_vma+0x170/0x950 [ 31.290243] split_vma+0xc6/0x110 [ 31.290775] mprotect_fixup+0x8d2/0xb30 [ 31.291389] do_mprotect_pkey+0x87e/0xd40 [ 31.292017] __x64_sys_mprotect+0x78/0xc0 [ 31.292650] do_syscall_64+0x3f/0x90 [ 31.293225] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.294005] [ 31.294261] Freed by task 214: [ 31.294736] kasan_save_stack+0x22/0x50 [ 31.295365] kasan_set_track+0x25/0x30 [ 31.295965] kasan_save_free_info+0x2b/0x50 [ 31.296613] __kasan_slab_free+0x10a/0x190 [ 31.297303] kmem_cache_free+0x10d/0x4d0 [ 31.297917] rcu_core+0x8c8/0x2860 [ 31.298454] __do_softirq+0x1b7/0x7d4 [ 31.299030] [ 31.299298] Last potentially related work creation: [ 31.300010] kasan_save_stack+0x22/0x50 [ 31.300624] __kasan_record_aux_stack+0x8e/0xa0 [ 31.301319] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.302098] remove_vma+0x139/0x170 [ 31.302644] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.303330] do_vmi_munmap+0x1f1/0x2b0 [ 31.303920] __vm_munmap+0x138/0x3a0 [ 31.304490] __x64_sys_munmap+0x59/0x80 [ 31.305096] do_syscall_64+0x3f/0x90 [ 31.305678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.306464] [ 31.306724] The buggy address belongs to the object at ffff88800ea79e80 [ 31.306724] which belongs to the cache vm_area_struct of size 168 [ 31.308541] The buggy address is located 88 bytes inside of [ 31.308541] freed 168-byte region [ffff88800ea79e80, ffff88800ea79f28) [ 31.310268] [ 31.310530] The buggy address belongs to the physical page: [ 31.311350] page:000000009e32ec4b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea79 [ 31.312835] memcg:ffff88800e439e01 [ 31.313355] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.314153] page_type: 0xffffffff() [ 31.314704] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.315846] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e439e01 [ 31.316956] page dumped because: kasan: bad access detected [ 31.317765] [ 31.318023] Memory state around the buggy address: [ 31.318742] ffff88800ea79d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.319805] ffff88800ea79e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.320850] >ffff88800ea79e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.321890] ^ [ 31.322810] ffff88800ea79f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.323877] ffff88800ea79f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.324917] ================================================================== [ 31.326172] Disabling lock debugging due to kernel taint [ 33.239731] BUG: Bad rss-counter state mm:00000000763f5a99 type:MM_FILEPAGES val:33 [ 33.240940] BUG: Bad rss-counter state mm:00000000763f5a99 type:MM_ANONPAGES val:22 [ 33.690668] BUG: Bad rss-counter state mm:0000000062ee2822 type:MM_FILEPAGES val:33 [ 33.691927] BUG: Bad rss-counter state mm:0000000062ee2822 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40252' (ECDSA) to the list of known hosts. 2023/06/20 21:49:32 fuzzer started 2023/06/20 21:49:32 dialing manager at localhost:36067 2023/06/20 21:49:32 checking machine... 2023/06/20 21:49:32 checking revisions... [ 34.345354] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:49:32 testing simple program... [ 34.396874] cgroup: Unknown subsys name 'net' [ 34.447388] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:49:31 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801a0bf560 RCX=ffffffff864bbb54 RDX=1ffff11003417eac RSI=0000000000000000 RDI=ffff88801a0bf560 RBP=ffff88801a0bf5f8 RSP=ffff88801a0bf548 R8 =ffffffff864bbb58 R9 =ffff88801a0bf5a0 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88801a0bf628 R13=0000000000000000 R14=ffff888016490000 R15=ffff88801cd2e390 RIP=ffffffff8113035a 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 00007f2df9882900 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=00007fff0e2ae000 CR3=000000001681e000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=00007f81770e9f80 CR3=000000000ef78000 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=2031333a39343a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a39343a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000