syzkaller login: [ 39.088861] BUG: Bad rss-counter state mm:00000000ad404907 type:MM_FILEPAGES val:33 [ 39.089886] BUG: Bad rss-counter state mm:00000000ad404907 type:MM_ANONPAGES val:22 [ 39.253263] ================================================================== [ 39.254193] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.255141] Read of size 8 at addr ffff8880181f3140 by task sshd/220 [ 39.256014] [ 39.256238] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.257113] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.258102] Call Trace: [ 39.258427] [ 39.258715] dump_stack_lvl+0x91/0xf0 [ 39.259218] print_report+0xcc/0x620 [ 39.259716] ? __virt_addr_valid+0x102/0x340 [ 39.260271] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.260900] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.261532] kasan_report+0xbe/0xf0 [ 39.262018] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.262641] vma_interval_tree_remove+0xc75/0xec0 [ 39.263247] vma_prepare+0xc54/0x11a0 [ 39.263732] __split_vma+0x5af/0x950 [ 39.264206] ? __pfx___split_vma+0x10/0x10 [ 39.264742] ? find_held_lock+0x2c/0x110 [ 39.265284] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.265856] ? lock_is_held_type+0x9f/0x120 [ 39.266392] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.266999] ? mtree_range_walk+0x632/0x900 [ 39.267550] ? mas_walk+0x5c7/0x7c0 [ 39.268032] do_vmi_munmap+0x1f1/0x2b0 [ 39.268531] mmap_region+0x1f9/0x2660 [ 39.269026] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.269548] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.270265] ? __pfx_lock_acquire+0x10/0x10 [ 39.270796] ? __pfx_mmap_region+0x10/0x10 [ 39.271326] ? security_mmap_addr+0x7d/0xa0 [ 39.271867] ? get_unmapped_area+0x1f5/0x3f0 [ 39.272420] do_mmap+0x854/0xf00 [ 39.272858] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.273372] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.273940] ksys_mmap_pgoff+0x3af/0x500 [ 39.274450] do_syscall_64+0x3f/0x90 [ 39.274928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.275584] RIP: 0033:0x7fbc7827fd82 [ 39.276041] 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 [ 39.278169] RSP: 002b:00007ffdc94268f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.279070] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbc7827fd82 [ 39.279921] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbc776b9000 [ 39.280767] RBP: 00007fbc776b9000 R08: 0000000000000009 R09: 0000000000001000 [ 39.281621] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a32d67ec0 [ 39.282472] R13: 00007ffdc9426910 R14: 00007ffdc9426940 R15: 00007ffdc9426ca0 [ 39.283334] [ 39.283628] [ 39.283841] Allocated by task 213: [ 39.284267] kasan_save_stack+0x22/0x50 [ 39.284769] kasan_set_track+0x25/0x30 [ 39.285288] __kasan_slab_alloc+0x59/0x70 [ 39.285826] kmem_cache_alloc+0x16b/0x370 [ 39.286347] vm_area_dup+0x20/0x160 [ 39.286805] __split_vma+0x170/0x950 [ 39.287281] split_vma+0xc6/0x110 [ 39.287731] mprotect_fixup+0x8d2/0xb30 [ 39.288239] do_mprotect_pkey+0x87e/0xd40 [ 39.288764] __x64_sys_mprotect+0x78/0xc0 [ 39.289311] do_syscall_64+0x3f/0x90 [ 39.289788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.290432] [ 39.290646] Freed by task 213: [ 39.291040] kasan_save_stack+0x22/0x50 [ 39.291547] kasan_set_track+0x25/0x30 [ 39.292042] kasan_save_free_info+0x2b/0x50 [ 39.292576] __kasan_slab_free+0x10a/0x190 [ 39.293123] kmem_cache_free+0x10d/0x4d0 [ 39.293636] rcu_core+0x8c8/0x2860 [ 39.294082] __do_softirq+0x1b7/0x7d4 [ 39.294562] [ 39.294775] Last potentially related work creation: [ 39.295372] kasan_save_stack+0x22/0x50 [ 39.295884] __kasan_record_aux_stack+0x8e/0xa0 [ 39.296459] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.297113] remove_vma+0x139/0x170 [ 39.297578] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.298136] do_vmi_munmap+0x1f1/0x2b0 [ 39.298629] __vm_munmap+0x138/0x3a0 [ 39.299104] __x64_sys_munmap+0x59/0x80 [ 39.299604] do_syscall_64+0x3f/0x90 [ 39.300076] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.300723] [ 39.300944] The buggy address belongs to the object at ffff8880181f30e8 [ 39.300944] which belongs to the cache vm_area_struct of size 168 [ 39.302453] The buggy address is located 88 bytes inside of [ 39.302453] freed 168-byte region [ffff8880181f30e8, ffff8880181f3190) [ 39.303869] [ 39.304090] The buggy address belongs to the physical page: [ 39.304757] page:000000006cf4345b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x181f3 [ 39.305896] memcg:ffff8880158b3601 [ 39.306323] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.306971] page_type: 0xffffffff() [ 39.307430] raw: 0100000000000200 ffff8880087a0c80 ffffea0000660440 dead000000000002 [ 39.308362] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880158b3601 [ 39.309295] page dumped because: kasan: bad access detected [ 39.309973] [ 39.310193] Memory state around the buggy address: [ 39.310799] ffff8880181f3000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.311695] ffff8880181f3080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 39.312585] >ffff8880181f3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.313499] ^ [ 39.314171] ffff8880181f3180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.315061] ffff8880181f3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.315956] ================================================================== [ 39.316971] Disabling lock debugging due to kernel taint [ 41.940562] BUG: Bad rss-counter state mm:00000000a81a3b8f type:MM_FILEPAGES val:33 [ 41.941494] BUG: Bad rss-counter state mm:00000000a81a3b8f type:MM_ANONPAGES val:22 [ 42.387563] BUG: Bad rss-counter state mm:000000003212576c type:MM_FILEPAGES val:33 [ 42.388551] BUG: Bad rss-counter state mm:000000003212576c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49474' (ECDSA) to the list of known hosts. 2023/06/21 05:08:34 fuzzer started 2023/06/21 05:08:34 dialing manager at localhost:36067 2023/06/21 05:08:34 checking machine... 2023/06/21 05:08:34 checking revisions... [ 43.099029] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:08:34 testing simple program... [ 43.150915] cgroup: Unknown subsys name 'net' [ 43.197355] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:08:33 Registers: info registers vcpu 0 RAX=ffff88800f5f0000 RBX=00007fff2c4d2910 RCX=ffffffff864bbb54 RDX=1ffff11001ebdef6 RSI=0000000000000000 RDI=ffff88800f5ef7b0 RBP=ffff88800f5e8000 RSP=ffff88800f5ef730 R8 =ffffffff864bbb58 R9 =ffff88800f5ef7e0 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88800f5eff58 R13=ffff88800f5ef7e8 R14=ffff88800f5eff58 R15=ffff88800f5ef7a0 RIP=ffffffff81131cb0 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 00007f7fc47cf900 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=00007f7fc4d870b0 CR3=000000000e8fc000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fe7451058a0 CR3=000000000d7d0000 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=e45cce4d397e7ebfd14579a4eee36fd8 XMM02=000000000011bc30ec2efd57dc4c00df XMM03=0000000000121e385130da51b432f981 XMM04=6fdd6406a7827f9700000000000ae988 XMM05=e4cb8bb95a7664b60000000000131940 XMM06=64a4b7bf2042dd070000000000130b18 XMM07=e042d86d42eb936e0000000000122110 XMM08=5130da51b432f981000000000011bc90 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000