syzkaller login: [ 31.823927] BUG: Bad rss-counter state mm:00000000875750d1 type:MM_FILEPAGES val:33 [ 31.825125] BUG: Bad rss-counter state mm:00000000875750d1 type:MM_ANONPAGES val:22 [ 31.863902] ================================================================== [ 31.864865] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.865835] Read of size 8 at addr ffff88800fcbb3f8 by task sshd/220 [ 31.866602] [ 31.866816] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.867676] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.868647] Call Trace: [ 31.868962] [ 31.869269] dump_stack_lvl+0x91/0xf0 [ 31.869756] print_report+0xcc/0x620 [ 31.870235] ? __virt_addr_valid+0x102/0x340 [ 31.870780] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.871398] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.872020] kasan_report+0xbe/0xf0 [ 31.872502] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.873116] vma_interval_tree_remove+0xc75/0xec0 [ 31.873733] vma_prepare+0xc54/0x11a0 [ 31.874219] __split_vma+0x5af/0x950 [ 31.874714] ? __pfx___split_vma+0x10/0x10 [ 31.875261] ? find_held_lock+0x2c/0x110 [ 31.875800] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.876396] ? lock_is_held_type+0x9f/0x120 [ 31.876955] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.877609] ? mtree_range_walk+0x632/0x900 [ 31.878188] ? mas_walk+0x5c7/0x7c0 [ 31.878682] do_vmi_munmap+0x1f1/0x2b0 [ 31.879191] mmap_region+0x1f9/0x2660 [ 31.879693] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.880228] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.880981] ? __pfx_lock_acquire+0x10/0x10 [ 31.881549] ? __pfx_mmap_region+0x10/0x10 [ 31.882098] ? security_mmap_addr+0x7d/0xa0 [ 31.882651] ? get_unmapped_area+0x1f5/0x3f0 [ 31.883224] do_mmap+0x854/0xf00 [ 31.883675] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.884188] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.884770] ksys_mmap_pgoff+0x3af/0x500 [ 31.885316] do_syscall_64+0x3f/0x90 [ 31.885812] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.886476] RIP: 0033:0x7f6599cabd82 [ 31.886961] 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 [ 31.889219] RSP: 002b:00007ffd62cfd768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.890173] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6599cabd82 [ 31.891175] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f65990e5000 [ 31.892102] RBP: 00007f65990e5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.893053] R10: 0000000000000812 R11: 0000000000000206 R12: 000056305f359f70 [ 31.894000] R13: 00007ffd62cfd780 R14: 00007ffd62cfd7b0 R15: 00007ffd62cfdb10 [ 31.894932] [ 31.895247] [ 31.895481] Allocated by task 213: [ 31.895943] kasan_save_stack+0x22/0x50 [ 31.896498] kasan_set_track+0x25/0x30 [ 31.897025] __kasan_slab_alloc+0x59/0x70 [ 31.897609] kmem_cache_alloc+0x16b/0x370 [ 31.898166] vm_area_dup+0x20/0x160 [ 31.898656] __split_vma+0x170/0x950 [ 31.899170] split_vma+0xc6/0x110 [ 31.899641] mprotect_fixup+0x8d2/0xb30 [ 31.900184] do_mprotect_pkey+0x87e/0xd40 [ 31.900750] __x64_sys_mprotect+0x78/0xc0 [ 31.901354] do_syscall_64+0x3f/0x90 [ 31.901867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.902559] [ 31.902792] Freed by task 213: [ 31.903213] kasan_save_stack+0x22/0x50 [ 31.903753] kasan_set_track+0x25/0x30 [ 31.904281] kasan_save_free_info+0x2b/0x50 [ 31.904853] __kasan_slab_free+0x10a/0x190 [ 31.905446] kmem_cache_free+0x10d/0x4d0 [ 31.905991] rcu_core+0x8c8/0x2860 [ 31.906474] __do_softirq+0x1b7/0x7d4 [ 31.906984] [ 31.907216] Last potentially related work creation: [ 31.907848] kasan_save_stack+0x22/0x50 [ 31.908387] __kasan_record_aux_stack+0x8e/0xa0 [ 31.909005] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.909732] remove_vma+0x139/0x170 [ 31.910217] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.910819] do_vmi_munmap+0x1f1/0x2b0 [ 31.911343] __vm_munmap+0x138/0x3a0 [ 31.911840] __x64_sys_munmap+0x59/0x80 [ 31.912383] do_syscall_64+0x3f/0x90 [ 31.912895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.913607] [ 31.913843] The buggy address belongs to the object at ffff88800fcbb3a0 [ 31.913843] which belongs to the cache vm_area_struct of size 168 [ 31.915438] The buggy address is located 88 bytes inside of [ 31.915438] freed 168-byte region [ffff88800fcbb3a0, ffff88800fcbb448) [ 31.916960] [ 31.917200] The buggy address belongs to the physical page: [ 31.917916] page:00000000e36dd40d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfcbb [ 31.919096] memcg:ffff8880165bf001 [ 31.919559] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.920266] page_type: 0xffffffff() [ 31.920744] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.921770] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880165bf001 [ 31.922767] page dumped because: kasan: bad access detected [ 31.923483] [ 31.923714] Memory state around the buggy address: [ 31.924350] ffff88800fcbb280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.925296] ffff88800fcbb300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.926222] >ffff88800fcbb380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.927140] ^ [ 31.928048] ffff88800fcbb400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.928977] ffff88800fcbb480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.929931] ================================================================== [ 31.931211] Disabling lock debugging due to kernel taint [ 33.884643] BUG: Bad rss-counter state mm:00000000a7037ab7 type:MM_FILEPAGES val:33 [ 33.886154] BUG: Bad rss-counter state mm:00000000a7037ab7 type:MM_ANONPAGES val:22 [ 34.375172] BUG: Bad rss-counter state mm:00000000d00420af type:MM_FILEPAGES val:33 [ 34.376195] BUG: Bad rss-counter state mm:00000000d00420af type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31503' (ECDSA) to the list of known hosts. 2023/06/19 14:13:21 fuzzer started 2023/06/19 14:13:22 dialing manager at localhost:44161 2023/06/19 14:13:22 checking machine... 2023/06/19 14:13:22 checking revisions... [ 35.091522] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:13:22 testing simple program... [ 35.137296] cgroup: Unknown subsys name 'net' [ 35.208529] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:13:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864bb001 RDX=1ffffffff0a80fbe RSI=ffffffff8450d49f RDI=ffffffff85407df0 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864bb032 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407d68 R15=ffff88806ce09a98 RIP=ffffffff811306b3 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 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=00007ffdafdacd08 CR3=0000000005482000 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=00007fdd270eb51000005595f4370790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=00007ff662642400 RCX=ffffffff813a0ac9 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff888016927a08 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff8880142ed1c0 R15=ffff88801a1ff260 RIP=ffffffff814c01d0 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 00007ff66214f900 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=00007ff662706618 CR3=0000000018146000 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