syzkaller login: [ 30.717495] BUG: Bad rss-counter state mm:00000000895a97c1 type:MM_FILEPAGES val:33 [ 30.719011] BUG: Bad rss-counter state mm:00000000895a97c1 type:MM_ANONPAGES val:22 [ 30.829184] ================================================================== [ 30.830273] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.831510] Read of size 8 at addr ffff88801678bc20 by task sshd/221 [ 30.831985] [ 30.832108] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.832587] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.833133] Call Trace: [ 30.833308] [ 30.833466] dump_stack_lvl+0x91/0xf0 [ 30.833739] print_report+0xcc/0x620 [ 30.834008] ? __virt_addr_valid+0x102/0x340 [ 30.834311] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.834648] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.834982] kasan_report+0xbe/0xf0 [ 30.835242] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.835598] vma_interval_tree_remove+0xc75/0xec0 [ 30.835934] vma_prepare+0xc54/0x11a0 [ 30.836201] __split_vma+0x5af/0x950 [ 30.836458] ? __pfx___split_vma+0x10/0x10 [ 30.836751] ? find_held_lock+0x2c/0x110 [ 30.837039] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.837349] ? lock_is_held_type+0x9f/0x120 [ 30.837647] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.837979] ? mtree_range_walk+0x632/0x900 [ 30.838284] ? mas_walk+0x5c7/0x7c0 [ 30.838545] do_vmi_munmap+0x1f1/0x2b0 [ 30.838818] mmap_region+0x1f9/0x2660 [ 30.839081] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.839366] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.839794] ? __pfx_lock_acquire+0x10/0x10 [ 30.840112] ? __pfx_mmap_region+0x10/0x10 [ 30.840430] ? security_mmap_addr+0x7d/0xa0 [ 30.840752] ? get_unmapped_area+0x1f5/0x3f0 [ 30.841079] do_mmap+0x854/0xf00 [ 30.841336] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.841635] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.841971] ksys_mmap_pgoff+0x3af/0x500 [ 30.842271] do_syscall_64+0x3f/0x90 [ 30.842567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.842965] RIP: 0033:0x7f80b82f6d82 [ 30.843235] 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 [ 30.844538] RSP: 002b:00007fffd33eeef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.845083] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f80b82f6d82 [ 30.845604] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f80b7730000 [ 30.846121] RBP: 00007f80b7730000 R08: 0000000000000009 R09: 0000000000001000 [ 30.846636] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555e0badaec0 [ 30.847159] R13: 00007fffd33eef10 R14: 00007fffd33eef40 R15: 00007fffd33ef2a0 [ 30.847683] [ 30.847848] [ 30.847972] Allocated by task 214: [ 30.848236] kasan_save_stack+0x22/0x50 [ 30.848524] kasan_set_track+0x25/0x30 [ 30.848819] __kasan_slab_alloc+0x59/0x70 [ 30.849139] kmem_cache_alloc+0x16b/0x370 [ 30.849444] vm_area_dup+0x20/0x160 [ 30.849717] __split_vma+0x170/0x950 [ 30.849998] split_vma+0xc6/0x110 [ 30.850255] mprotect_fixup+0x8d2/0xb30 [ 30.850555] do_mprotect_pkey+0x87e/0xd40 [ 30.850864] __x64_sys_mprotect+0x78/0xc0 [ 30.851178] do_syscall_64+0x3f/0x90 [ 30.851469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.851860] [ 30.851992] Freed by task 214: [ 30.852228] kasan_save_stack+0x22/0x50 [ 30.852532] kasan_set_track+0x25/0x30 [ 30.852819] kasan_save_free_info+0x2b/0x50 [ 30.853142] __kasan_slab_free+0x10a/0x190 [ 30.853456] kmem_cache_free+0x10d/0x4d0 [ 30.853765] rcu_core+0x8c8/0x2860 [ 30.854029] __do_softirq+0x1b7/0x7d4 [ 30.854325] [ 30.854451] Last potentially related work creation: [ 30.854804] kasan_save_stack+0x22/0x50 [ 30.855097] __kasan_record_aux_stack+0x8e/0xa0 [ 30.855446] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.855826] remove_vma+0x139/0x170 [ 30.856085] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.856412] do_vmi_munmap+0x1f1/0x2b0 [ 30.856696] __vm_munmap+0x138/0x3a0 [ 30.856978] __x64_sys_munmap+0x59/0x80 [ 30.857278] do_syscall_64+0x3f/0x90 [ 30.857566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.857945] [ 30.858073] The buggy address belongs to the object at ffff88801678bbc8 [ 30.858073] which belongs to the cache vm_area_struct of size 168 [ 30.858951] The buggy address is located 88 bytes inside of [ 30.858951] freed 168-byte region [ffff88801678bbc8, ffff88801678bc70) [ 30.859794] [ 30.859920] The buggy address belongs to the physical page: [ 30.860315] page:0000000002f45b38 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1678b [ 30.860975] memcg:ffff8880097bde01 [ 30.861227] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.861621] page_type: 0xffffffff() [ 30.861897] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.862458] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097bde01 [ 30.863010] page dumped because: kasan: bad access detected [ 30.863433] [ 30.863565] Memory state around the buggy address: [ 30.863910] ffff88801678bb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.864419] ffff88801678bb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.864937] >ffff88801678bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.865447] ^ [ 30.865765] ffff88801678bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.866266] ffff88801678bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.866763] ================================================================== [ 30.867465] Disabling lock debugging due to kernel taint [ 32.899164] BUG: Bad rss-counter state mm:00000000dff376f3 type:MM_FILEPAGES val:33 [ 32.901389] BUG: Bad rss-counter state mm:00000000dff376f3 type:MM_ANONPAGES val:22 [ 33.410596] BUG: Bad rss-counter state mm:00000000045dedb0 type:MM_FILEPAGES val:32 [ 33.411812] BUG: Bad rss-counter state mm:00000000045dedb0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14300' (ECDSA) to the list of known hosts. 2023/06/21 05:10:31 fuzzer started 2023/06/21 05:10:31 dialing manager at localhost:36067 2023/06/21 05:10:31 checking machine... 2023/06/21 05:10:31 checking revisions... [ 34.157746] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:10:31 testing simple program... [ 34.214132] cgroup: Unknown subsys name 'net' [ 34.265204] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:10:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff87f97640 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000dc0 RDI=ffffffff85beb1c0 RBP=ffffffff85beb1c0 RSP=ffff88801cdcfd70 R8 =0000000000000000 R9 =0000000000000001 R10=0000000000000002 R11=00000000000b6a61 R12=0000000000000cc0 R13=0000000000000000 R14=0000000000000001 R15=0000000000000024 RIP=ffffffff83644240 RFL=00000206 [-----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 00007fe96d023900 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=00007fe96d5d8650 CR3=000000000d050000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81370a89 RDX=dffffc0000000000 RSI=000000000000370a RDI=ffff888008e37930 RBP=ffff888008e37988 RSP=ffff888008e378c0 R8 =0000000000000001 R9 =ffff888008e37970 R10=0000000000038001 R11=0000000000020ed2 R12=ffff888008e37990 R13=ffff888008e37978 R14=ffff888008e37971 R15=ffff888008e37930 RIP=ffffffff81130764 RFL=00000287 [--S--PC] 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=00007ffec44affc8 CR3=0000000005482000 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=00007effc03bd5100000561c3f38f790 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