syzkaller login: [ 48.775443] BUG: Bad rss-counter state mm:00000000a60fd92e type:MM_FILEPAGES val:33 [ 48.776739] BUG: Bad rss-counter state mm:00000000a60fd92e type:MM_ANONPAGES val:22 [ 48.811087] ================================================================== [ 48.812127] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.813133] Read of size 8 at addr ffff88800d77b6b0 by task sshd/220 [ 48.813901] [ 48.814116] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.814977] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.815993] Call Trace: [ 48.816324] [ 48.816620] dump_stack_lvl+0x91/0xf0 [ 48.817104] print_report+0xcc/0x620 [ 48.817588] ? __virt_addr_valid+0x102/0x340 [ 48.818167] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.818807] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.819435] kasan_report+0xbe/0xf0 [ 48.819918] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.820547] vma_interval_tree_remove+0xc75/0xec0 [ 48.821151] vma_prepare+0xc54/0x11a0 [ 48.821635] __split_vma+0x5af/0x950 [ 48.822112] ? __pfx___split_vma+0x10/0x10 [ 48.822654] ? find_held_lock+0x2c/0x110 [ 48.823198] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.823814] ? lock_is_held_type+0x9f/0x120 [ 48.824388] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.824992] ? mtree_range_walk+0x632/0x900 [ 48.825549] ? mas_walk+0x5c7/0x7c0 [ 48.826055] do_vmi_munmap+0x1f1/0x2b0 [ 48.826587] mmap_region+0x1f9/0x2660 [ 48.827092] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.827615] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.828341] ? __pfx_lock_acquire+0x10/0x10 [ 48.828888] ? __pfx_mmap_region+0x10/0x10 [ 48.829418] ? security_mmap_addr+0x7d/0xa0 [ 48.829958] ? get_unmapped_area+0x1f5/0x3f0 [ 48.830513] do_mmap+0x854/0xf00 [ 48.830964] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.831486] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.832057] ksys_mmap_pgoff+0x3af/0x500 [ 48.832571] do_syscall_64+0x3f/0x90 [ 48.833057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.833718] RIP: 0033:0x7f908c817d82 [ 48.834196] 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 [ 48.836373] RSP: 002b:00007fff6fa318d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.837281] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f908c817d82 [ 48.838128] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f908bc51000 [ 48.838983] RBP: 00007f908bc51000 R08: 0000000000000009 R09: 0000000000001000 [ 48.839845] R10: 0000000000000812 R11: 0000000000000206 R12: 000055725c555ec0 [ 48.840693] R13: 00007fff6fa318f0 R14: 00007fff6fa31920 R15: 00007fff6fa31c80 [ 48.841546] [ 48.841859] [ 48.842075] Allocated by task 213: [ 48.842504] kasan_save_stack+0x22/0x50 [ 48.843023] kasan_set_track+0x25/0x30 [ 48.843555] __kasan_slab_alloc+0x59/0x70 [ 48.844097] kmem_cache_alloc+0x16b/0x370 [ 48.844611] vm_area_dup+0x20/0x160 [ 48.845078] __split_vma+0x170/0x950 [ 48.845562] split_vma+0xc6/0x110 [ 48.846006] mprotect_fixup+0x8d2/0xb30 [ 48.846511] do_mprotect_pkey+0x87e/0xd40 [ 48.847033] __x64_sys_mprotect+0x78/0xc0 [ 48.847564] do_syscall_64+0x3f/0x90 [ 48.848047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.848695] [ 48.848908] Freed by task 213: [ 48.849305] kasan_save_stack+0x22/0x50 [ 48.849806] kasan_set_track+0x25/0x30 [ 48.850302] kasan_save_free_info+0x2b/0x50 [ 48.850845] __kasan_slab_free+0x10a/0x190 [ 48.851406] kmem_cache_free+0x10d/0x4d0 [ 48.851922] rcu_core+0x8c8/0x2860 [ 48.852384] __do_softirq+0x1b7/0x7d4 [ 48.852867] [ 48.853086] Last potentially related work creation: [ 48.853710] kasan_save_stack+0x22/0x50 [ 48.854237] __kasan_record_aux_stack+0x8e/0xa0 [ 48.854833] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.855496] remove_vma+0x139/0x170 [ 48.855952] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.856523] do_vmi_munmap+0x1f1/0x2b0 [ 48.857009] __vm_munmap+0x138/0x3a0 [ 48.857471] __x64_sys_munmap+0x59/0x80 [ 48.857976] do_syscall_64+0x3f/0x90 [ 48.858444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.859095] [ 48.859326] The buggy address belongs to the object at ffff88800d77b658 [ 48.859326] which belongs to the cache vm_area_struct of size 168 [ 48.860832] The buggy address is located 88 bytes inside of [ 48.860832] freed 168-byte region [ffff88800d77b658, ffff88800d77b700) [ 48.862286] [ 48.862501] The buggy address belongs to the physical page: [ 48.863192] page:00000000f828834a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd77b [ 48.864342] memcg:ffff88800ebc6401 [ 48.864764] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 48.865455] page_type: 0xffffffff() [ 48.865911] raw: 0100000000000200 ffff88800879fc80 ffffea00003bc040 dead00000000000d [ 48.866822] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebc6401 [ 48.867737] page dumped because: kasan: bad access detected [ 48.868417] [ 48.868640] Memory state around the buggy address: [ 48.869238] ffff88800d77b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 48.870086] ffff88800d77b600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 48.870943] >ffff88800d77b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.871812] ^ [ 48.872397] ffff88800d77b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 48.873254] ffff88800d77b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 48.874102] ================================================================== [ 48.875135] Disabling lock debugging due to kernel taint [ 51.512041] BUG: Bad rss-counter state mm:0000000037462939 type:MM_FILEPAGES val:33 [ 51.513003] BUG: Bad rss-counter state mm:0000000037462939 type:MM_ANONPAGES val:22 [ 52.029069] BUG: Bad rss-counter state mm:0000000070790650 type:MM_FILEPAGES val:33 [ 52.030345] BUG: Bad rss-counter state mm:0000000070790650 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62017' (ECDSA) to the list of known hosts. 2023/06/20 06:42:59 fuzzer started 2023/06/20 06:42:59 dialing manager at localhost:44161 2023/06/20 06:42:59 checking machine... 2023/06/20 06:42:59 checking revisions... [ 52.664003] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:42:59 testing simple program... [ 52.711960] cgroup: Unknown subsys name 'net' [ 52.771250] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:42:42 Registers: info registers vcpu 0 RAX=fffffbfff0ba77da RBX=fffffbfff0ba77db RCX=ffffffff81798982 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff8880146ffa00 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffea000051c4c0 R15=ffff8880146ffa78 RIP=ffffffff8180f009 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 00007f59f7980900 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=00007f59f7f380b0 CR3=000000000d8fc000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffc713bd6c8 CR3=000000000ef14000 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=2038353a32343a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a32343a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000