syzkaller login: [ 31.299264] BUG: Bad rss-counter state mm:0000000043ac1060 type:MM_FILEPAGES val:33 [ 31.300473] BUG: Bad rss-counter state mm:0000000043ac1060 type:MM_ANONPAGES val:22 [ 31.344183] ================================================================== [ 31.345239] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.346189] Read of size 8 at addr ffff888015e00310 by task sshd/220 [ 31.346961] [ 31.347182] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.348072] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.349070] Call Trace: [ 31.349391] [ 31.349675] dump_stack_lvl+0x91/0xf0 [ 31.350181] print_report+0xcc/0x620 [ 31.350662] ? __virt_addr_valid+0x102/0x340 [ 31.351229] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.351849] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.352478] kasan_report+0xbe/0xf0 [ 31.352993] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.353620] vma_interval_tree_remove+0xc75/0xec0 [ 31.354231] vma_prepare+0xc54/0x11a0 [ 31.354716] __split_vma+0x5af/0x950 [ 31.355207] ? __pfx___split_vma+0x10/0x10 [ 31.355742] ? find_held_lock+0x2c/0x110 [ 31.356269] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.356834] ? lock_is_held_type+0x9f/0x120 [ 31.357412] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.358024] ? mtree_range_walk+0x632/0x900 [ 31.358578] ? mas_walk+0x5c7/0x7c0 [ 31.359058] do_vmi_munmap+0x1f1/0x2b0 [ 31.359544] mmap_region+0x1f9/0x2660 [ 31.360024] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.360539] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.361270] ? __pfx_lock_acquire+0x10/0x10 [ 31.361814] ? __pfx_mmap_region+0x10/0x10 [ 31.362342] ? security_mmap_addr+0x7d/0xa0 [ 31.362882] ? get_unmapped_area+0x1f5/0x3f0 [ 31.363443] do_mmap+0x854/0xf00 [ 31.363885] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.364379] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.364964] ksys_mmap_pgoff+0x3af/0x500 [ 31.365465] do_syscall_64+0x3f/0x90 [ 31.365947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.366592] RIP: 0033:0x7fcd88454d82 [ 31.367047] 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 [ 31.369160] RSP: 002b:00007fff0e7a1f98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.370058] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcd88454d82 [ 31.370899] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcd8788e000 [ 31.371742] RBP: 00007fcd8788e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.372580] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fe0d3f8ec0 [ 31.373451] R13: 00007fff0e7a1fb0 R14: 00007fff0e7a1fe0 R15: 00007fff0e7a2340 [ 31.374305] [ 31.374597] [ 31.374812] Allocated by task 213: [ 31.375238] kasan_save_stack+0x22/0x50 [ 31.375737] kasan_set_track+0x25/0x30 [ 31.376226] __kasan_slab_alloc+0x59/0x70 [ 31.376744] kmem_cache_alloc+0x16b/0x370 [ 31.377268] vm_area_dup+0x20/0x160 [ 31.377717] __split_vma+0x170/0x950 [ 31.378181] split_vma+0xc6/0x110 [ 31.378613] mprotect_fixup+0x8d2/0xb30 [ 31.379113] do_mprotect_pkey+0x87e/0xd40 [ 31.379628] __x64_sys_mprotect+0x78/0xc0 [ 31.380151] do_syscall_64+0x3f/0x90 [ 31.380626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.381295] [ 31.381508] Freed by task 213: [ 31.381896] kasan_save_stack+0x22/0x50 [ 31.382398] kasan_set_track+0x25/0x30 [ 31.382891] kasan_save_free_info+0x2b/0x50 [ 31.383416] __kasan_slab_free+0x10a/0x190 [ 31.383950] kmem_cache_free+0x10d/0x4d0 [ 31.384456] rcu_core+0x8c8/0x2860 [ 31.384911] __do_softirq+0x1b7/0x7d4 [ 31.385385] [ 31.385603] Last potentially related work creation: [ 31.386183] kasan_save_stack+0x22/0x50 [ 31.386682] __kasan_record_aux_stack+0x8e/0xa0 [ 31.387251] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.387884] remove_vma+0x139/0x170 [ 31.388329] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.388951] do_vmi_munmap+0x1f1/0x2b0 [ 31.389439] __vm_munmap+0x138/0x3a0 [ 31.389922] __x64_sys_munmap+0x59/0x80 [ 31.390426] do_syscall_64+0x3f/0x90 [ 31.390904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.391540] [ 31.391755] The buggy address belongs to the object at ffff888015e002b8 [ 31.391755] which belongs to the cache vm_area_struct of size 168 [ 31.393219] The buggy address is located 88 bytes inside of [ 31.393219] freed 168-byte region [ffff888015e002b8, ffff888015e00360) [ 31.394613] [ 31.394832] The buggy address belongs to the physical page: [ 31.395490] page:000000000b1921f4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e00 [ 31.396580] memcg:ffff888015cef201 [ 31.397020] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.397660] page_type: 0xffffffff() [ 31.398114] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.399023] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015cef201 [ 31.399920] page dumped because: kasan: bad access detected [ 31.400576] [ 31.400791] Memory state around the buggy address: [ 31.401385] ffff888015e00200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.402235] ffff888015e00280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.403084] >ffff888015e00300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.403934] ^ [ 31.404396] ffff888015e00380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.405249] ffff888015e00400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.406094] ================================================================== [ 31.407410] Disabling lock debugging due to kernel taint [ 33.830652] BUG: Bad rss-counter state mm:00000000ee2e1f13 type:MM_FILEPAGES val:33 [ 33.832202] BUG: Bad rss-counter state mm:00000000ee2e1f13 type:MM_ANONPAGES val:22 [ 34.394435] BUG: Bad rss-counter state mm:0000000054e3db88 type:MM_FILEPAGES val:33 [ 34.395592] BUG: Bad rss-counter state mm:0000000054e3db88 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41268' (ECDSA) to the list of known hosts. 2023/06/21 07:29:41 fuzzer started 2023/06/21 07:29:41 dialing manager at localhost:36067 2023/06/21 07:29:41 checking machine... 2023/06/21 07:29:41 checking revisions... [ 35.057916] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:29:41 testing simple program... [ 35.103915] cgroup: Unknown subsys name 'net' [ 35.165339] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:29:40 Registers: info registers vcpu 0 RAX=ffffffff83650bf8 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002d49f37 RSI=ffffffff83650bf8 RDI=ffff888016a4fa28 RBP=ffff888016a4f9f8 RSP=ffff888016a4f958 R8 =0000000000000001 R9 =ffff888016a4f9a0 R10=0000000000038001 R11=000000000008ad19 R12=ffff888016a4fa28 R13=0000000000000000 R14=ffff8880164851c0 R15=0000000000000001 RIP=ffffffff813ad470 RFL=00000282 [--S----] 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 00007f38515aa900 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=00007f3851b620b0 CR3=000000001cc9c000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801035f528 RCX=0000000000000001 RDX=1ffff1100206bea7 RSI=ffff88801035fea0 RDI=ffff88801035f538 RBP=ffff88801035fea0 RSP=ffff88801035f480 R8 =ffffffff8614277e R9 =ffff88801035f568 R10=0000000000038001 R11=0000000000022713 R12=0000000000000008 R13=ffff888010358000 R14=ffff88801035fea8 R15=ffff88801035f528 RIP=ffffffff81130468 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 00007f6163a62700 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=00007f11cc9b63d0 CR3=000000001668e000 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=2030343a39323a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a39323a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000