syzkaller login: [ 30.799117] BUG: Bad rss-counter state mm:000000009a91ef89 type:MM_FILEPAGES val:33 [ 30.801063] BUG: Bad rss-counter state mm:000000009a91ef89 type:MM_ANONPAGES val:22 [ 30.961771] ================================================================== [ 30.962834] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.963978] Read of size 8 at addr ffff888019c434e0 by task sshd/221 [ 30.964854] [ 30.965062] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.965867] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.966793] Call Trace: [ 30.967104] [ 30.967377] dump_stack_lvl+0x91/0xf0 [ 30.967846] print_report+0xcc/0x620 [ 30.968305] ? __virt_addr_valid+0x102/0x340 [ 30.968819] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.969404] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.969981] kasan_report+0xbe/0xf0 [ 30.970434] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.971030] vma_interval_tree_remove+0xc75/0xec0 [ 30.971610] vma_prepare+0xc54/0x11a0 [ 30.972090] __split_vma+0x5af/0x950 [ 30.972566] ? __pfx___split_vma+0x10/0x10 [ 30.973091] ? find_held_lock+0x2c/0x110 [ 30.973606] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.974165] ? lock_is_held_type+0x9f/0x120 [ 30.974704] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.975318] ? mtree_range_walk+0x632/0x900 [ 30.975875] ? mas_walk+0x5c7/0x7c0 [ 30.976354] do_vmi_munmap+0x1f1/0x2b0 [ 30.976837] mmap_region+0x1f9/0x2660 [ 30.977319] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.977830] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.978539] ? __pfx_lock_acquire+0x10/0x10 [ 30.979086] ? __pfx_mmap_region+0x10/0x10 [ 30.979603] ? security_mmap_addr+0x7d/0xa0 [ 30.980125] ? get_unmapped_area+0x1f5/0x3f0 [ 30.980668] do_mmap+0x854/0xf00 [ 30.981099] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.981587] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.982146] ksys_mmap_pgoff+0x3af/0x500 [ 30.982649] do_syscall_64+0x3f/0x90 [ 30.983159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.983807] RIP: 0033:0x7fdb26119d82 [ 30.984263] 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 [ 30.986377] RSP: 002b:00007ffdc1d2f4c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.987273] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdb26119d82 [ 30.988116] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdb25553000 [ 30.988957] RBP: 00007fdb25553000 R08: 0000000000000009 R09: 0000000000001000 [ 30.989799] R10: 0000000000000812 R11: 0000000000000206 R12: 00005634f581a980 [ 30.990636] R13: 00007ffdc1d2f4e0 R14: 00007ffdc1d2f510 R15: 00007ffdc1d2f870 [ 30.991495] [ 30.991781] [ 30.991988] Allocated by task 214: [ 30.992410] kasan_save_stack+0x22/0x50 [ 30.992907] kasan_set_track+0x25/0x30 [ 30.993391] __kasan_slab_alloc+0x59/0x70 [ 30.993907] kmem_cache_alloc+0x16b/0x370 [ 30.994421] vm_area_dup+0x20/0x160 [ 30.994868] __split_vma+0x170/0x950 [ 30.995342] split_vma+0xc6/0x110 [ 30.995778] mprotect_fixup+0x8d2/0xb30 [ 30.996280] do_mprotect_pkey+0x87e/0xd40 [ 30.996786] __x64_sys_mprotect+0x78/0xc0 [ 30.997295] do_syscall_64+0x3f/0x90 [ 30.997766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.998392] [ 30.998610] Freed by task 214: [ 30.999004] kasan_save_stack+0x22/0x50 [ 30.999497] kasan_set_track+0x25/0x30 [ 30.999983] kasan_save_free_info+0x2b/0x50 [ 31.000508] __kasan_slab_free+0x10a/0x190 [ 31.001034] kmem_cache_free+0x10d/0x4d0 [ 31.001543] rcu_core+0x8c8/0x2860 [ 31.001982] __do_softirq+0x1b7/0x7d4 [ 31.002452] [ 31.002666] Last potentially related work creation: [ 31.003255] kasan_save_stack+0x22/0x50 [ 31.003745] __kasan_record_aux_stack+0x8e/0xa0 [ 31.004324] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.004963] remove_vma+0x139/0x170 [ 31.005408] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.005952] do_vmi_munmap+0x1f1/0x2b0 [ 31.006428] __vm_munmap+0x138/0x3a0 [ 31.006891] __x64_sys_munmap+0x59/0x80 [ 31.007399] do_syscall_64+0x3f/0x90 [ 31.007865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.008509] [ 31.008716] The buggy address belongs to the object at ffff888019c43488 [ 31.008716] which belongs to the cache vm_area_struct of size 168 [ 31.010172] The buggy address is located 88 bytes inside of [ 31.010172] freed 168-byte region [ffff888019c43488, ffff888019c43530) [ 31.011583] [ 31.011796] The buggy address belongs to the physical page: [ 31.012450] page:000000009b5e2abe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c43 [ 31.013546] memcg:ffff88800f08f101 [ 31.013966] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.014598] page_type: 0xffffffff() [ 31.015064] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.015977] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f08f101 [ 31.016867] page dumped because: kasan: bad access detected [ 31.017522] [ 31.017730] Memory state around the buggy address: [ 31.018308] ffff888019c43380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.019166] ffff888019c43400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.020028] >ffff888019c43480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.020867] ^ [ 31.021615] ffff888019c43500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.022463] ffff888019c43580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.023323] ================================================================== [ 31.024280] Disabling lock debugging due to kernel taint [ 32.945621] BUG: Bad rss-counter state mm:00000000aef41fc7 type:MM_FILEPAGES val:33 [ 32.946644] BUG: Bad rss-counter state mm:00000000aef41fc7 type:MM_ANONPAGES val:22 [ 33.487055] BUG: Bad rss-counter state mm:00000000b6d8c13c type:MM_FILEPAGES val:33 [ 33.488360] BUG: Bad rss-counter state mm:00000000b6d8c13c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32461' (ECDSA) to the list of known hosts. 2023/06/21 00:53:37 fuzzer started 2023/06/21 00:53:37 dialing manager at localhost:36067 2023/06/21 00:53:37 checking machine... 2023/06/21 00:53:37 checking revisions... [ 34.162074] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:53:37 testing simple program... [ 34.186472] cgroup: Unknown subsys name 'net' [ 34.216253] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:53:36 Registers: info registers vcpu 0 RAX=1ffffffff0c82630 RBX=0000000000000001 RCX=ffffffff86413182 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff86413184 RBP=ffff88801ca27860 RSP=ffff88801ca27798 R8 =ffffffff86413186 R9 =ffff88801ca27848 R10=0000000000038001 R11=000000000009a8b6 R12=ffff88801ca27868 R13=ffff88801ca27850 R14=ffff88801ca27df0 R15=ffff88801ca27808 RIP=ffffffff811311c7 RFL=00000217 [----APC] 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 00007fcbab7c8900 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=00007fcbabd7d650 CR3=00000000100f8000 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=ffff888016eade40 RBX=0000000000000000 RCX=00000000800d000d RDX=00000000800d000b RSI=ffffffff81806deb RDI=0000000000000000 RBP=ffff888014627560 RSP=ffff8880146274a0 R8 =00000000800d000d R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffffffff81806f71 R12=ffff88800844f780 R13=ffff888016eadd10 R14=ffffea00005bab40 R15=ffff88806cf3de00 RIP=ffffffff81807426 RFL=00000082 [--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 00007f7caec6c900 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=00007f7cae0ea540 CR3=000000000d840000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=4333e9330c1babd100000000000ae988 XMM05=b1a5285b4df0352f0000000000133878 XMM06=c291bd5c70af25b90000000000132668 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000