syzkaller login: [ 104.894701] BUG: Bad rss-counter state mm:000000002d90f460 type:MM_FILEPAGES val:33 [ 104.896579] BUG: Bad rss-counter state mm:000000002d90f460 type:MM_ANONPAGES val:22 [ 105.055196] ================================================================== [ 105.056133] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 105.057070] Read of size 8 at addr ffff888009895c20 by task sshd/220 [ 105.057947] [ 105.058211] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 105.059272] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 105.060264] Call Trace: [ 105.060583] [ 105.060872] dump_stack_lvl+0x91/0xf0 [ 105.061369] print_report+0xcc/0x620 [ 105.061861] ? __virt_addr_valid+0x102/0x340 [ 105.062417] ? vma_interval_tree_remove+0xc75/0xec0 [ 105.063046] ? vma_interval_tree_remove+0xc75/0xec0 [ 105.063672] kasan_report+0xbe/0xf0 [ 105.064154] ? vma_interval_tree_remove+0xc75/0xec0 [ 105.064796] vma_interval_tree_remove+0xc75/0xec0 [ 105.065411] vma_prepare+0xc54/0x11a0 [ 105.065890] __split_vma+0x5af/0x950 [ 105.066366] ? __pfx___split_vma+0x10/0x10 [ 105.066901] ? find_held_lock+0x2c/0x110 [ 105.067420] do_vmi_align_munmap+0x2ba/0x11f0 [ 105.067996] ? lock_is_held_type+0x9f/0x120 [ 105.068531] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 105.069148] ? mtree_range_walk+0x632/0x900 [ 105.069700] ? mas_walk+0x5c7/0x7c0 [ 105.070183] do_vmi_munmap+0x1f1/0x2b0 [ 105.070674] mmap_region+0x1f9/0x2660 [ 105.071177] ? vm_mmap_pgoff+0x15c/0x3a0 [ 105.071689] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 105.072413] ? __pfx_lock_acquire+0x10/0x10 [ 105.072945] ? __pfx_mmap_region+0x10/0x10 [ 105.073471] ? security_mmap_addr+0x7d/0xa0 [ 105.074006] ? get_unmapped_area+0x1f5/0x3f0 [ 105.074559] do_mmap+0x854/0xf00 [ 105.075012] vm_mmap_pgoff+0x1a6/0x3a0 [ 105.075513] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 105.076077] ksys_mmap_pgoff+0x3af/0x500 [ 105.076596] do_syscall_64+0x3f/0x90 [ 105.077072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 105.077718] RIP: 0033:0x7f6ccb94fd82 [ 105.078177] 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 [ 105.080325] RSP: 002b:00007ffd9fc89848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 105.081229] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6ccb94fd82 [ 105.082083] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6ccad89000 [ 105.082949] RBP: 00007f6ccad89000 R08: 0000000000000009 R09: 0000000000001000 [ 105.083807] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e226a8ec0 [ 105.084649] R13: 00007ffd9fc89860 R14: 00007ffd9fc89890 R15: 00007ffd9fc89bf0 [ 105.085506] [ 105.085801] [ 105.086015] Allocated by task 213: [ 105.086454] kasan_save_stack+0x22/0x50 [ 105.086967] kasan_set_track+0x25/0x30 [ 105.087462] __kasan_slab_alloc+0x59/0x70 [ 105.087986] kmem_cache_alloc+0x16b/0x370 [ 105.088501] vm_area_dup+0x20/0x160 [ 105.088955] __split_vma+0x170/0x950 [ 105.089426] split_vma+0xc6/0x110 [ 105.089868] mprotect_fixup+0x8d2/0xb30 [ 105.090381] do_mprotect_pkey+0x87e/0xd40 [ 105.090924] __x64_sys_mprotect+0x78/0xc0 [ 105.091443] do_syscall_64+0x3f/0x90 [ 105.091916] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 105.092557] [ 105.092774] Freed by task 213: [ 105.093161] kasan_save_stack+0x22/0x50 [ 105.093674] kasan_set_track+0x25/0x30 [ 105.094169] kasan_save_free_info+0x2b/0x50 [ 105.094703] __kasan_slab_free+0x10a/0x190 [ 105.095241] kmem_cache_free+0x10d/0x4d0 [ 105.095747] rcu_core+0x8c8/0x2860 [ 105.096190] __do_softirq+0x1b7/0x7d4 [ 105.096664] [ 105.096877] Last potentially related work creation: [ 105.097460] kasan_save_stack+0x22/0x50 [ 105.097962] __kasan_record_aux_stack+0x8e/0xa0 [ 105.098534] __call_rcu_common.constprop.0+0x6a/0xb90 [ 105.099234] remove_vma+0x139/0x170 [ 105.099686] do_vmi_align_munmap+0xd4a/0x11f0 [ 105.100272] do_vmi_munmap+0x1f1/0x2b0 [ 105.100819] __vm_munmap+0x138/0x3a0 [ 105.101294] __x64_sys_munmap+0x59/0x80 [ 105.101798] do_syscall_64+0x3f/0x90 [ 105.102269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 105.102959] [ 105.103176] Second to last potentially related work creation: [ 105.103863] kasan_save_stack+0x22/0x50 [ 105.104368] __kasan_record_aux_stack+0x8e/0xa0 [ 105.104943] __call_rcu_common.constprop.0+0x6a/0xb90 [ 105.105590] remove_vma+0x139/0x170 [ 105.106041] do_vmi_align_munmap+0xd4a/0x11f0 [ 105.106603] do_vmi_munmap+0x1f1/0x2b0 [ 105.107103] mmap_region+0x1f9/0x2660 [ 105.107577] do_mmap+0x854/0xf00 [ 105.108007] vm_mmap_pgoff+0x1a6/0x3a0 [ 105.108493] ksys_mmap_pgoff+0x3af/0x500 [ 105.109010] do_syscall_64+0x3f/0x90 [ 105.109504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 105.110171] [ 105.110391] The buggy address belongs to the object at ffff888009895bc8 [ 105.110391] which belongs to the cache vm_area_struct of size 168 [ 105.111943] The buggy address is located 88 bytes inside of [ 105.111943] freed 168-byte region [ffff888009895bc8, ffff888009895c70) [ 105.113415] [ 105.113645] The buggy address belongs to the physical page: [ 105.114346] page:0000000071805954 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9895 [ 105.115488] memcg:ffff8880099b4b01 [ 105.115939] flags: 0x100000000000200(slab|node=0|zone=1) [ 105.116621] page_type: 0xffffffff() [ 105.117095] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 105.118060] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880099b4b01 [ 105.119023] page dumped because: kasan: bad access detected [ 105.119719] [ 105.119941] Memory state around the buggy address: [ 105.120558] ffff888009895b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 105.121451] ffff888009895b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 105.122343] >ffff888009895c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 105.123240] ^ [ 105.123793] ffff888009895c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 105.124683] ffff888009895d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 105.125571] ================================================================== [ 105.126594] Disabling lock debugging due to kernel taint [ 107.922867] BUG: Bad rss-counter state mm:00000000867d6a5b type:MM_FILEPAGES val:33 [ 107.924527] BUG: Bad rss-counter state mm:00000000867d6a5b type:MM_ANONPAGES val:22 [ 108.507872] BUG: Bad rss-counter state mm:000000009f4d22c5 type:MM_FILEPAGES val:33 [ 108.509078] BUG: Bad rss-counter state mm:000000009f4d22c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51431' (ECDSA) to the list of known hosts. 2023/06/20 02:57:29 fuzzer started 2023/06/20 02:57:29 dialing manager at localhost:44161 2023/06/20 02:57:29 checking machine... 2023/06/20 02:57:29 checking revisions... [ 109.141384] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:57:30 testing simple program... [ 109.182339] cgroup: Unknown subsys name 'net' [ 109.225801] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:56:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86136d88 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86136d8c R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020c48 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=0000000000000004 R15=ffff88806ce09a98 RIP=ffffffff81130b1f 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 00007fc9c20d9900 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=00007fd87d025650 CR3=000000000f2a4000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b0d025e2b8877e6200000000000ae988 XMM05=7e19d1b07caaac24000000000013eec8 XMM06=77edb945318daffb000000000013dc68 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000008a7ac RBX=0000000000000001 RCX=ffffffff836367f6 RDX=000000000000000f RSI=ffffffff863b11d4 RDI=ffffffff85fa3284 RBP=ffff88801024fa00 RSP=ffff88801024f930 R8 =ffffffff863b11d4 R9 =ffff88801024f9e8 R10=0000000000038001 R11=000000000008a7ac R12=ffff88801024fa08 R13=ffff88801024f9f0 R14=ffff88801024f9e9 R15=ffff88801024f9a8 RIP=ffffffff8112fc10 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 00007fd87ca70900 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=00007fd87d027618 CR3=00000000184c2000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000