syzkaller login: [ 33.118385] BUG: Bad rss-counter state mm:000000008177b2d1 type:MM_FILEPAGES val:33 [ 33.119646] BUG: Bad rss-counter state mm:000000008177b2d1 type:MM_ANONPAGES val:22 [ 33.201082] ================================================================== [ 33.202080] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.203059] Read of size 8 at addr ffff88800c50b310 by task sshd/221 [ 33.203997] [ 33.204222] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.205109] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.206099] Call Trace: [ 33.206427] [ 33.206723] dump_stack_lvl+0x91/0xf0 [ 33.207221] print_report+0xcc/0x620 [ 33.207709] ? __virt_addr_valid+0x102/0x340 [ 33.208282] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.208939] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.209565] kasan_report+0xbe/0xf0 [ 33.210045] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.210668] vma_interval_tree_remove+0xc75/0xec0 [ 33.211272] vma_prepare+0xc54/0x11a0 [ 33.211756] __split_vma+0x5af/0x950 [ 33.212266] ? __pfx___split_vma+0x10/0x10 [ 33.212848] ? find_held_lock+0x2c/0x110 [ 33.213384] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.213961] ? lock_is_held_type+0x9f/0x120 [ 33.214509] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.215118] ? mtree_range_walk+0x632/0x900 [ 33.215671] ? mas_walk+0x5c7/0x7c0 [ 33.216155] do_vmi_munmap+0x1f1/0x2b0 [ 33.216652] mmap_region+0x1f9/0x2660 [ 33.217147] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.217690] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.218432] ? __pfx_lock_acquire+0x10/0x10 [ 33.218986] ? __pfx_mmap_region+0x10/0x10 [ 33.219533] ? security_mmap_addr+0x7d/0xa0 [ 33.220070] ? get_unmapped_area+0x1f5/0x3f0 [ 33.220654] do_mmap+0x854/0xf00 [ 33.221110] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.221630] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.222192] ksys_mmap_pgoff+0x3af/0x500 [ 33.222706] do_syscall_64+0x3f/0x90 [ 33.223210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.223879] RIP: 0033:0x7f1234c43d82 [ 33.224342] 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 [ 33.226475] RSP: 002b:00007ffca9179bf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.227423] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1234c43d82 [ 33.228320] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f123407d000 [ 33.229227] RBP: 00007f123407d000 R08: 0000000000000009 R09: 0000000000001000 [ 33.230115] R10: 0000000000000812 R11: 0000000000000206 R12: 00005575c2829d90 [ 33.230972] R13: 00007ffca9179c10 R14: 00007ffca9179c40 R15: 00007ffca9179fa0 [ 33.231871] [ 33.232166] [ 33.232403] Allocated by task 214: [ 33.232845] kasan_save_stack+0x22/0x50 [ 33.233375] kasan_set_track+0x25/0x30 [ 33.233892] __kasan_slab_alloc+0x59/0x70 [ 33.234421] kmem_cache_alloc+0x16b/0x370 [ 33.234942] vm_area_dup+0x20/0x160 [ 33.235399] __split_vma+0x170/0x950 [ 33.235879] split_vma+0xc6/0x110 [ 33.236328] mprotect_fixup+0x8d2/0xb30 [ 33.236859] do_mprotect_pkey+0x87e/0xd40 [ 33.237394] __x64_sys_mprotect+0x78/0xc0 [ 33.237923] do_syscall_64+0x3f/0x90 [ 33.238434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.239094] [ 33.239314] Freed by task 13: [ 33.239713] kasan_save_stack+0x22/0x50 [ 33.240246] kasan_set_track+0x25/0x30 [ 33.240773] kasan_save_free_info+0x2b/0x50 [ 33.241332] __kasan_slab_free+0x10a/0x190 [ 33.241900] kmem_cache_free+0x10d/0x4d0 [ 33.242426] rcu_core+0x8c8/0x2860 [ 33.242885] __do_softirq+0x1b7/0x7d4 [ 33.243375] [ 33.243595] Last potentially related work creation: [ 33.244197] kasan_save_stack+0x22/0x50 [ 33.244727] __kasan_record_aux_stack+0x8e/0xa0 [ 33.245328] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.246004] remove_vma+0x139/0x170 [ 33.246460] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.247031] do_vmi_munmap+0x1f1/0x2b0 [ 33.247525] __vm_munmap+0x138/0x3a0 [ 33.247998] __x64_sys_munmap+0x59/0x80 [ 33.248532] do_syscall_64+0x3f/0x90 [ 33.249031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.249672] [ 33.249887] The buggy address belongs to the object at ffff88800c50b2b8 [ 33.249887] which belongs to the cache vm_area_struct of size 168 [ 33.251364] The buggy address is located 88 bytes inside of [ 33.251364] freed 168-byte region [ffff88800c50b2b8, ffff88800c50b360) [ 33.252771] [ 33.252986] The buggy address belongs to the physical page: [ 33.253642] page:000000006176bad2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc50b [ 33.254721] memcg:ffff888013afd101 [ 33.255161] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.255858] page_type: 0xffffffff() [ 33.256309] raw: 0100000000000200 ffff88800879fc80 ffffea00003b3e00 dead000000000007 [ 33.257247] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013afd101 [ 33.258158] page dumped because: kasan: bad access detected [ 33.258814] [ 33.259029] Memory state around the buggy address: [ 33.259614] ffff88800c50b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 33.260482] ffff88800c50b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.261358] >ffff88800c50b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.262215] ^ [ 33.262683] ffff88800c50b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.263549] ffff88800c50b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.264410] ================================================================== [ 33.265413] Disabling lock debugging due to kernel taint [ 35.208278] BUG: Bad rss-counter state mm:00000000d7ed3e3f type:MM_FILEPAGES val:33 [ 35.209685] BUG: Bad rss-counter state mm:00000000d7ed3e3f type:MM_ANONPAGES val:22 [ 35.701118] BUG: Bad rss-counter state mm:00000000b2be4926 type:MM_FILEPAGES val:33 [ 35.702097] BUG: Bad rss-counter state mm:00000000b2be4926 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19611' (ECDSA) to the list of known hosts. 2023/06/19 11:20:54 fuzzer started 2023/06/19 11:20:54 dialing manager at localhost:44161 2023/06/19 11:20:54 checking machine... 2023/06/19 11:20:54 checking revisions... [ 36.408784] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:20:54 testing simple program... [ 36.474664] cgroup: Unknown subsys name 'net' [ 36.516141] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:20:49 Registers: info registers vcpu 0 RAX=ffff88800cfb38a0 RBX=ffff88800c92ea00 RCX=0000000000000009 RDX=0000000000000600 RSI=ffff88800cfb3880 RDI=ffff8880087b6780 RBP=ffff888008d7fd18 RSP=ffff888008d7fcf0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000128 R12=ffff8880087b6780 R13=ffffea0000324b80 R14=ffffffff8186b9c5 R15=ffff888016686c80 RIP=ffffffff81809c73 RFL=00000212 [----A--] 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=00007f60eafba650 CR3=000000000dcc6000 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=ffff88800d967670 RCX=0000000000000001 RDX=1ffff11001b2cee3 RSI=ffffffff83c22ffc RDI=ffff88800d96767c RBP=ffff88800d967718 RSP=ffff88800d967588 R8 =0000000000000001 R9 =ffff88800d9675e8 R10=0000000000038001 R11=000000000008b93b R12=ffff88800d967670 R13=0000000000000000 R14=ffff88800d968000 R15=ffff888016686c80 RIP=ffffffff813ad4f7 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 00007f7d166d2900 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=00007f7d15ad5c40 CR3=000000000c5b8000 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=7a1c39009566f1a8f04ec900a2781ec4 XMM02=ec2efd57dc4c00df000000000011c978 XMM03=f696edc25ca8bf67000000000011ca48 XMM04=fb9cc7ff60243c0c00000000000ae988 XMM05=f2d9f9f1393ebe640000000000134f78 XMM06=c291bd5c70af25b90000000000133d68 XMM07=fb795ef6d657705600000000001242c8 XMM08=2c67c8bc2e329bc3000000000011c9e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000