syzkaller login: [ 40.992993] BUG: Bad rss-counter state mm:0000000026677a72 type:MM_FILEPAGES val:33 [ 40.993666] BUG: Bad rss-counter state mm:0000000026677a72 type:MM_ANONPAGES val:22 [ 41.223959] ================================================================== [ 41.237674] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.239678] Read of size 8 at addr ffff888013679a50 by task sshd/222 [ 41.241216] [ 41.241603] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.251419] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.253511] Call Trace: [ 41.254176] [ 41.254737] dump_stack_lvl+0x91/0xf0 [ 41.255686] print_report+0xcc/0x620 [ 41.256613] ? __virt_addr_valid+0x102/0x340 [ 41.257712] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.258955] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.260224] kasan_report+0xbe/0xf0 [ 41.261145] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.262417] vma_interval_tree_remove+0xc75/0xec0 [ 41.263605] vma_prepare+0xc54/0x11a0 [ 41.264944] __split_vma+0x5af/0x950 [ 41.266148] ? __pfx___split_vma+0x10/0x10 [ 41.267231] ? find_held_lock+0x2c/0x110 [ 41.268238] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.269348] ? lock_is_held_type+0x9f/0x120 [ 41.269918] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.270324] ? mtree_range_walk+0x632/0x900 [ 41.270701] ? mas_walk+0x5c7/0x7c0 [ 41.271024] do_vmi_munmap+0x1f1/0x2b0 [ 41.271358] mmap_region+0x1f9/0x2660 [ 41.271690] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.272061] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.272544] ? __pfx_lock_acquire+0x10/0x10 [ 41.272902] ? __pfx_mmap_region+0x10/0x10 [ 41.273267] ? security_mmap_addr+0x7d/0xa0 [ 41.273648] ? get_unmapped_area+0x1f5/0x3f0 [ 41.274024] do_mmap+0x854/0xf00 [ 41.274330] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.274664] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.275048] ksys_mmap_pgoff+0x3af/0x500 [ 41.275393] do_syscall_64+0x3f/0x90 [ 41.275719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.276153] RIP: 0033:0x7fd87e676d82 [ 41.276462] 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 [ 41.277898] RSP: 002b:00007ffe55e98dc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.278525] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd87e676d82 [ 41.279096] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd87dab0000 [ 41.279689] RBP: 00007fd87dab0000 R08: 0000000000000009 R09: 0000000000001000 [ 41.280249] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bd06c3bec0 [ 41.280815] R13: 00007ffe55e98de0 R14: 00007ffe55e98e10 R15: 00007ffe55e99170 [ 41.281382] [ 41.281582] [ 41.281766] Allocated by task 213: [ 41.282053] kasan_save_stack+0x22/0x50 [ 41.282394] kasan_set_track+0x25/0x30 [ 41.282729] __kasan_slab_alloc+0x59/0x70 [ 41.283082] kmem_cache_alloc+0x16b/0x370 [ 41.283430] vm_area_dup+0x20/0x160 [ 41.283738] __split_vma+0x170/0x950 [ 41.284052] split_vma+0xc6/0x110 [ 41.284352] mprotect_fixup+0x8d2/0xb30 [ 41.284690] do_mprotect_pkey+0x87e/0xd40 [ 41.285059] __x64_sys_mprotect+0x78/0xc0 [ 41.285421] do_syscall_64+0x3f/0x90 [ 41.285759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.286217] [ 41.286372] Freed by task 213: [ 41.286641] kasan_save_stack+0x22/0x50 [ 41.286980] kasan_set_track+0x25/0x30 [ 41.287313] kasan_save_free_info+0x2b/0x50 [ 41.287678] __kasan_slab_free+0x10a/0x190 [ 41.288036] kmem_cache_free+0x10d/0x4d0 [ 41.288380] rcu_core+0x8c8/0x2860 [ 41.288680] __do_softirq+0x1b7/0x7d4 [ 41.289006] [ 41.289153] Last potentially related work creation: [ 41.289539] kasan_save_stack+0x22/0x50 [ 41.289903] __kasan_record_aux_stack+0x8e/0xa0 [ 41.290291] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.290722] remove_vma+0x139/0x170 [ 41.291027] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.291404] do_vmi_munmap+0x1f1/0x2b0 [ 41.291729] __vm_munmap+0x138/0x3a0 [ 41.292064] __x64_sys_munmap+0x59/0x80 [ 41.292407] do_syscall_64+0x3f/0x90 [ 41.292729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.293164] [ 41.293337] The buggy address belongs to the object at ffff8880136799f8 [ 41.293337] which belongs to the cache vm_area_struct of size 168 [ 41.298342] The buggy address is located 88 bytes inside of [ 41.298342] freed 168-byte region [ffff8880136799f8, ffff888013679aa0) [ 41.299283] [ 41.299431] The buggy address belongs to the physical page: [ 41.299865] page:0000000038774202 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13679 [ 41.300632] memcg:ffff888018f0a701 [ 41.300918] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.301351] page_type: 0xffffffff() [ 41.301656] raw: 0100000000000200 ffff88800879fc80 ffffea00003f4480 dead000000000002 [ 41.302282] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018f0a701 [ 41.302875] page dumped because: kasan: bad access detected [ 41.303310] [ 41.303458] Memory state around the buggy address: [ 41.303840] ffff888013679900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.304405] ffff888013679980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 41.304952] >ffff888013679a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.305538] ^ [ 41.306047] ffff888013679a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 41.306653] ffff888013679b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.307211] ================================================================== [ 41.308117] Disabling lock debugging due to kernel taint [ 46.353641] BUG: Bad rss-counter state mm:00000000255a3533 type:MM_FILEPAGES val:33 [ 46.354405] BUG: Bad rss-counter state mm:00000000255a3533 type:MM_ANONPAGES val:22 [ 47.055595] BUG: Bad rss-counter state mm:000000007259c2fc type:MM_FILEPAGES val:33 [ 47.056271] BUG: Bad rss-counter state mm:000000007259c2fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32991' (ECDSA) to the list of known hosts. 2023/06/20 08:22:03 fuzzer started 2023/06/20 08:22:03 dialing manager at localhost:44161 2023/06/20 08:22:03 checking machine... 2023/06/20 08:22:03 checking revisions... [ 48.210134] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:22:04 testing simple program... [ 48.316283] cgroup: Unknown subsys name 'net' [ 48.417497] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:22:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453084b RDX=fffffbfff0adb045 RSI=0000000000000004 RDI=ffffffff856d8220 RBP=ffffffff856d8220 RSP=ffff888008d7f930 R8 =0000000000000000 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=0000000000000000 R12=0000000000000003 R13=fffffbfff0adb044 R14=0000000000000001 R15=1ffff110011aff27 RIP=ffffffff845308c8 RFL=00000002 [-------] 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=00007f3fea3bd240 CR3=000000000d5ca000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=9947ef1d63ee541a0000000000135290 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=cc4465a8d415622d00000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86164279 RBX=0000000000000001 RCX=ffffffff86164274 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800fda74c0 RSP=ffff88800fda73f8 R8 =ffffffff86164278 R9 =ffff88800fda74a8 R10=0000000000038001 R11=0000000000028514 R12=ffff88800fda74c8 R13=ffff88800fda74b0 R14=ffff88800fda74a9 R15=ffff88800fda7468 RIP=ffffffff81130ab5 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 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=000055decdece650 CR3=000000000db0c000 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=0000000000000018fffffffe7ffbfeff XMM01=00000000000000020000564000000030 XMM02=00000000000000008000000000000006 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00a5b51f8d5472d10000000000000000 XMM06=3dd4f06ef6177287512aa352fd10569f XMM07=26300fdaa5148aa62d3a784030476556 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000