syzkaller login: [ 38.777348] BUG: Bad rss-counter state mm:0000000037e83e0c type:MM_FILEPAGES val:33 [ 38.778659] BUG: Bad rss-counter state mm:0000000037e83e0c type:MM_ANONPAGES val:22 [ 38.949025] ================================================================== [ 38.950442] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.951749] Read of size 8 at addr ffff88800cb5edf0 by task sshd/219 [ 38.952519] [ 38.952750] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.953667] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.954641] Call Trace: [ 38.954975] [ 38.955258] dump_stack_lvl+0x91/0xf0 [ 38.955763] print_report+0xcc/0x620 [ 38.956264] ? __virt_addr_valid+0x102/0x340 [ 38.956837] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.957470] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.958104] kasan_report+0xbe/0xf0 [ 38.958597] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.959218] vma_interval_tree_remove+0xc75/0xec0 [ 38.959836] vma_prepare+0xc54/0x11a0 [ 38.960318] __split_vma+0x5af/0x950 [ 38.960818] ? __pfx___split_vma+0x10/0x10 [ 38.961350] ? find_held_lock+0x2c/0x110 [ 38.961903] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.962470] ? lock_is_held_type+0x9f/0x120 [ 38.963016] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.963640] ? mtree_range_walk+0x632/0x900 [ 38.964191] ? mas_walk+0x5c7/0x7c0 [ 38.964678] do_vmi_munmap+0x1f1/0x2b0 [ 38.965171] mmap_region+0x1f9/0x2660 [ 38.965712] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.966220] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.966942] ? __pfx_lock_acquire+0x10/0x10 [ 38.967477] ? __pfx_mmap_region+0x10/0x10 [ 38.968018] ? security_mmap_addr+0x7d/0xa0 [ 38.968556] ? get_unmapped_area+0x1f5/0x3f0 [ 38.969128] do_mmap+0x854/0xf00 [ 38.969596] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.970103] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.970693] ksys_mmap_pgoff+0x3af/0x500 [ 38.971200] do_syscall_64+0x3f/0x90 [ 38.971736] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.972406] RIP: 0033:0x7effe52d0d82 [ 38.972892] 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 [ 38.975227] RSP: 002b:00007fffb8de7658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.976124] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007effe52d0d82 [ 38.976988] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007effe470a000 [ 38.977880] RBP: 00007effe470a000 R08: 0000000000000009 R09: 0000000000001000 [ 38.978732] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564eabb4bec0 [ 38.979577] R13: 00007fffb8de7670 R14: 00007fffb8de76a0 R15: 00007fffb8de7a00 [ 38.980437] [ 38.980742] [ 38.980956] Allocated by task 212: [ 38.981391] kasan_save_stack+0x22/0x50 [ 38.981922] kasan_set_track+0x25/0x30 [ 38.982416] __kasan_slab_alloc+0x59/0x70 [ 38.982948] kmem_cache_alloc+0x16b/0x370 [ 38.983462] vm_area_dup+0x20/0x160 [ 38.983927] __split_vma+0x170/0x950 [ 38.984390] split_vma+0xc6/0x110 [ 38.984840] mprotect_fixup+0x8d2/0xb30 [ 38.985340] do_mprotect_pkey+0x87e/0xd40 [ 38.985901] __x64_sys_mprotect+0x78/0xc0 [ 38.986420] do_syscall_64+0x3f/0x90 [ 38.986903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.987550] [ 38.987769] Freed by task 212: [ 38.988160] kasan_save_stack+0x22/0x50 [ 38.988669] kasan_set_track+0x25/0x30 [ 38.989158] kasan_save_free_info+0x2b/0x50 [ 38.989736] __kasan_slab_free+0x10a/0x190 [ 38.990264] kmem_cache_free+0x10d/0x4d0 [ 38.990783] rcu_core+0x8c8/0x2860 [ 38.991221] __do_softirq+0x1b7/0x7d4 [ 38.991713] [ 38.991929] Last potentially related work creation: [ 38.992566] kasan_save_stack+0x22/0x50 [ 38.993068] __kasan_record_aux_stack+0x8e/0xa0 [ 38.993679] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.994312] remove_vma+0x139/0x170 [ 38.994790] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.995351] do_vmi_munmap+0x1f1/0x2b0 [ 38.995846] __vm_munmap+0x138/0x3a0 [ 38.996312] __x64_sys_munmap+0x59/0x80 [ 38.996817] do_syscall_64+0x3f/0x90 [ 38.997299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.997960] [ 38.998175] Second to last potentially related work creation: [ 38.998876] kasan_save_stack+0x22/0x50 [ 38.999380] __kasan_record_aux_stack+0x8e/0xa0 [ 38.999972] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.000619] remove_vma+0x139/0x170 [ 39.001070] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.001666] do_vmi_munmap+0x1f1/0x2b0 [ 39.002146] mmap_region+0x1f9/0x2660 [ 39.002679] do_mmap+0x854/0xf00 [ 39.003109] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.003624] ksys_mmap_pgoff+0x3af/0x500 [ 39.004130] do_syscall_64+0x3f/0x90 [ 39.004616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.005257] [ 39.005482] The buggy address belongs to the object at ffff88800cb5ed98 [ 39.005482] which belongs to the cache vm_area_struct of size 168 [ 39.006962] The buggy address is located 88 bytes inside of [ 39.006962] freed 168-byte region [ffff88800cb5ed98, ffff88800cb5ee40) [ 39.008384] [ 39.008615] The buggy address belongs to the physical page: [ 39.009273] page:00000000ee7df5d7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb5e [ 39.010380] memcg:ffff88800e978101 [ 39.010825] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.011467] page_type: 0xffffffff() [ 39.011927] raw: 0100000000000200 ffff8880087a0c80 ffffea0000372ec0 dead000000000008 [ 39.012932] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e978101 [ 39.013897] page dumped because: kasan: bad access detected [ 39.014571] [ 39.014789] Memory state around the buggy address: [ 39.015361] ffff88800cb5ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.016217] ffff88800cb5ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.017092] >ffff88800cb5ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.017970] ^ [ 39.018782] ffff88800cb5ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.019646] ffff88800cb5ee80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.020498] ================================================================== [ 39.021753] Disabling lock debugging due to kernel taint [ 41.818169] BUG: Bad rss-counter state mm:000000009f709b25 type:MM_FILEPAGES val:33 [ 41.819205] BUG: Bad rss-counter state mm:000000009f709b25 type:MM_ANONPAGES val:22 [ 42.286361] BUG: Bad rss-counter state mm:00000000b0b35572 type:MM_FILEPAGES val:33 [ 42.288003] BUG: Bad rss-counter state mm:00000000b0b35572 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28506' (ECDSA) to the list of known hosts. 2023/06/21 04:06:57 fuzzer started 2023/06/21 04:06:57 dialing manager at localhost:36067 2023/06/21 04:06:57 checking machine... 2023/06/21 04:06:57 checking revisions... [ 43.049294] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:06:57 testing simple program... [ 43.089110] cgroup: Unknown subsys name 'net' [ 43.127640] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:06:56 Registers: info registers vcpu 0 RAX=ffffea0000385380 RBX=ffff88800e14e000 RCX=ffffea0000000000 RDX=ffff88800844f780 RSI=ffffffff813782f8 RDI=ffff88800844f780 RBP=ffff888008d9fd38 RSP=ffff888008d9fd10 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=ffff88800844f780 R13=ffff88808e14e000 R14=ffffffff813782f8 R15=ffff88800e14e080 RIP=ffffffff81809a4f RFL=00000282 [--S----] 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=00007f6b0127a650 CR3=000000000e064000 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=ffff88800e2ad798 RCX=ffff88800e2ad798 RDX=ffff88800e2ad830 RSI=0000000000000000 RDI=ffff88800e2ad798 RBP=0000000000000098 RSP=ffff888019b378d8 R8 =ffff88800e2ad798 R9 =0000000000040800 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800e2ad798 R13=0000000000000cc0 R14=0000000000000000 R15=0000000000000cc0 RIP=ffffffff81810068 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 00007f21ff65b900 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=00007fd6dd1e6020 CR3=000000000fc8a000 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=f37da135845f29ba5042012bcc07a70f XMM02=000000000011af08d59e07bde36eea69 XMM03=000000000011b030ec2efd57dc4c00df XMM04=5a8599ce01296c3100000000000ae988 XMM05=07a0fefdc5125e100000000000133d30 XMM06=806171799158d96700000000001327b0 XMM07=fb795ef6d657705600000000001219f0 XMM08=2c67c8bc2e329bc3000000000011b030 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000