syzkaller login: [ 31.032234] BUG: Bad rss-counter state mm:00000000ff92f26a type:MM_FILEPAGES val:33 [ 31.033339] BUG: Bad rss-counter state mm:00000000ff92f26a type:MM_ANONPAGES val:22 [ 31.203443] ================================================================== [ 31.204387] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.205328] Read of size 8 at addr ffff88800ed35798 by task sshd/220 [ 31.206187] [ 31.206439] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.207304] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.208313] Call Trace: [ 31.208655] [ 31.208947] dump_stack_lvl+0x91/0xf0 [ 31.209437] print_report+0xcc/0x620 [ 31.209922] ? __virt_addr_valid+0x102/0x340 [ 31.210481] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.211110] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.211736] kasan_report+0xbe/0xf0 [ 31.212208] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.212832] vma_interval_tree_remove+0xc75/0xec0 [ 31.213433] vma_prepare+0xc54/0x11a0 [ 31.213915] __split_vma+0x5af/0x950 [ 31.214387] ? __pfx___split_vma+0x10/0x10 [ 31.214912] ? find_held_lock+0x2c/0x110 [ 31.215440] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.216010] ? lock_is_held_type+0x9f/0x120 [ 31.216552] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.217152] ? mtree_range_walk+0x632/0x900 [ 31.217705] ? mas_walk+0x5c7/0x7c0 [ 31.218182] do_vmi_munmap+0x1f1/0x2b0 [ 31.218676] mmap_region+0x1f9/0x2660 [ 31.219158] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.219687] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.220394] ? __pfx_lock_acquire+0x10/0x10 [ 31.220931] ? __pfx_mmap_region+0x10/0x10 [ 31.221457] ? security_mmap_addr+0x7d/0xa0 [ 31.221983] ? get_unmapped_area+0x1f5/0x3f0 [ 31.222527] do_mmap+0x854/0xf00 [ 31.222969] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.223464] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.224044] ksys_mmap_pgoff+0x3af/0x500 [ 31.224549] do_syscall_64+0x3f/0x90 [ 31.225034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.225689] RIP: 0033:0x7f1ed4db4d82 [ 31.226147] 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 [ 31.228289] RSP: 002b:00007ffd0ed4c678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.229196] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1ed4db4d82 [ 31.230042] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1ed41ee000 [ 31.230882] RBP: 00007f1ed41ee000 R08: 0000000000000009 R09: 0000000000001000 [ 31.231747] R10: 0000000000000812 R11: 0000000000000206 R12: 000056292901dec0 [ 31.232594] R13: 00007ffd0ed4c690 R14: 00007ffd0ed4c6c0 R15: 00007ffd0ed4ca20 [ 31.233454] [ 31.233744] [ 31.233962] Allocated by task 213: [ 31.234391] kasan_save_stack+0x22/0x50 [ 31.234902] kasan_set_track+0x25/0x30 [ 31.235396] __kasan_slab_alloc+0x59/0x70 [ 31.235926] kmem_cache_alloc+0x16b/0x370 [ 31.236438] vm_area_dup+0x20/0x160 [ 31.236891] __split_vma+0x170/0x950 [ 31.237359] split_vma+0xc6/0x110 [ 31.237803] mprotect_fixup+0x8d2/0xb30 [ 31.238306] do_mprotect_pkey+0x87e/0xd40 [ 31.238823] __x64_sys_mprotect+0x78/0xc0 [ 31.239340] do_syscall_64+0x3f/0x90 [ 31.239821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.240470] [ 31.240685] Freed by task 203: [ 31.241076] kasan_save_stack+0x22/0x50 [ 31.241579] kasan_set_track+0x25/0x30 [ 31.242070] kasan_save_free_info+0x2b/0x50 [ 31.242601] __kasan_slab_free+0x10a/0x190 [ 31.243134] kmem_cache_free+0x10d/0x4d0 [ 31.243657] rcu_core+0x8c8/0x2860 [ 31.244108] __do_softirq+0x1b7/0x7d4 [ 31.244596] [ 31.244815] Last potentially related work creation: [ 31.245414] kasan_save_stack+0x22/0x50 [ 31.245916] __kasan_record_aux_stack+0x8e/0xa0 [ 31.246500] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.247143] remove_vma+0x139/0x170 [ 31.247610] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.248284] do_vmi_munmap+0x1f1/0x2b0 [ 31.248788] __vm_munmap+0x138/0x3a0 [ 31.249273] __x64_sys_munmap+0x59/0x80 [ 31.249776] do_syscall_64+0x3f/0x90 [ 31.250258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.250918] [ 31.251140] The buggy address belongs to the object at ffff88800ed35740 [ 31.251140] which belongs to the cache vm_area_struct of size 168 [ 31.252669] The buggy address is located 88 bytes inside of [ 31.252669] freed 168-byte region [ffff88800ed35740, ffff88800ed357e8) [ 31.254115] [ 31.254340] The buggy address belongs to the physical page: [ 31.255033] page:000000008b855af7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed35 [ 31.256173] memcg:ffff88800c681701 [ 31.256612] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.257283] page_type: 0xffffffff() [ 31.257758] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.258715] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c681701 [ 31.259684] page dumped because: kasan: bad access detected [ 31.260380] [ 31.260605] Memory state around the buggy address: [ 31.261219] ffff88800ed35680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.262107] ffff88800ed35700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.263003] >ffff88800ed35780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.263896] ^ [ 31.264412] ffff88800ed35800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.265307] ffff88800ed35880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.266199] ================================================================== [ 31.267164] Disabling lock debugging due to kernel taint [ 33.250806] BUG: Bad rss-counter state mm:0000000024a610ec type:MM_FILEPAGES val:33 [ 33.252022] BUG: Bad rss-counter state mm:0000000024a610ec type:MM_ANONPAGES val:22 [ 33.652047] BUG: Bad rss-counter state mm:000000002b371a39 type:MM_FILEPAGES val:33 [ 33.653342] BUG: Bad rss-counter state mm:000000002b371a39 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52784' (ECDSA) to the list of known hosts. 2023/06/20 11:10:05 fuzzer started 2023/06/20 11:10:05 dialing manager at localhost:36067 2023/06/20 11:10:05 checking machine... 2023/06/20 11:10:05 checking revisions... [ 34.398605] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:10:05 testing simple program... [ 34.445544] cgroup: Unknown subsys name 'net' [ 34.512850] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:10:05 Registers: info registers vcpu 0 RAX=1ffff110017055db RBX=ffff88800b82aea8 RCX=1ffff11001a33d6a RDX=dffffc0000000000 RSI=ffff888016472000 RDI=ffff88800b82aed8 RBP=ffff88800e47d798 RSP=ffff888016757638 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888016470000 R13=0000000000000000 R14=ffff88801aa6f9c8 R15=ffff88801aa6f980 RIP=ffffffff8184767e RFL=00000046 [---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 00007fc0cb41f900 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=00007ffd52355000 CR3=0000000016b6c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffea0000730480 RCX=0000000000000000 RDX=ffff888008d69b40 RSI=ffffffff81b256bc RDI=0000000000000000 RBP=0000000000001000 RSP=ffff888008d7f248 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000009293 R12=ffff88801b5a83a0 R13=ffff888008d7f638 R14=dffffc0000000000 R15=0000000000000fb9 RIP=ffffffff81b26493 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=00007f1078458c20 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000777074 XMM04=00007f5c2b411c71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=79732036373133343931203535373043 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000