syzkaller login: [ 30.766511] BUG: Bad rss-counter state mm:0000000099347d5e type:MM_FILEPAGES val:33 [ 30.768177] BUG: Bad rss-counter state mm:0000000099347d5e type:MM_ANONPAGES val:22 [ 30.926497] ================================================================== [ 30.927415] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.928352] Read of size 8 at addr ffff888019ccf880 by task sshd/220 [ 30.929124] [ 30.929347] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.930382] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.931364] Call Trace: [ 30.931685] [ 30.931968] dump_stack_lvl+0x91/0xf0 [ 30.932601] print_report+0xcc/0x620 [ 30.933187] ? __virt_addr_valid+0x102/0x340 [ 30.933835] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.934574] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.935318] kasan_report+0xbe/0xf0 [ 30.935892] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.936652] vma_interval_tree_remove+0xc75/0xec0 [ 30.937392] vma_prepare+0xc54/0x11a0 [ 30.937973] __split_vma+0x5af/0x950 [ 30.938562] ? __pfx___split_vma+0x10/0x10 [ 30.939213] ? find_held_lock+0x2c/0x110 [ 30.939849] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.940542] ? lock_is_held_type+0x9f/0x120 [ 30.941200] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.941942] ? mtree_range_walk+0x632/0x900 [ 30.942642] ? mas_walk+0x5c7/0x7c0 [ 30.943145] do_vmi_munmap+0x1f1/0x2b0 [ 30.943642] mmap_region+0x1f9/0x2660 [ 30.944123] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.944641] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.945357] ? __pfx_lock_acquire+0x10/0x10 [ 30.945886] ? __pfx_mmap_region+0x10/0x10 [ 30.946421] ? security_mmap_addr+0x7d/0xa0 [ 30.946952] ? get_unmapped_area+0x1f5/0x3f0 [ 30.947499] do_mmap+0x854/0xf00 [ 30.947938] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.948426] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.948991] ksys_mmap_pgoff+0x3af/0x500 [ 30.949504] do_syscall_64+0x3f/0x90 [ 30.949980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.950634] RIP: 0033:0x7f990aa5ad82 [ 30.951096] 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 [ 30.953219] RSP: 002b:00007ffe4224ab68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.954130] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f990aa5ad82 [ 30.955024] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9909e94000 [ 30.955912] RBP: 00007f9909e94000 R08: 0000000000000009 R09: 0000000000001000 [ 30.956798] R10: 0000000000000812 R11: 0000000000000206 R12: 00005580f8e5cec0 [ 30.957684] R13: 00007ffe4224ab80 R14: 00007ffe4224abb0 R15: 00007ffe4224af10 [ 30.958592] [ 30.958892] [ 30.959113] Allocated by task 213: [ 30.959556] kasan_save_stack+0x22/0x50 [ 30.960083] kasan_set_track+0x25/0x30 [ 30.960600] __kasan_slab_alloc+0x59/0x70 [ 30.961154] kmem_cache_alloc+0x16b/0x370 [ 30.961699] vm_area_dup+0x20/0x160 [ 30.962179] __split_vma+0x170/0x950 [ 30.962668] split_vma+0xc6/0x110 [ 30.963127] mprotect_fixup+0x8d2/0xb30 [ 30.963652] do_mprotect_pkey+0x87e/0xd40 [ 30.964188] __x64_sys_mprotect+0x78/0xc0 [ 30.964729] do_syscall_64+0x3f/0x90 [ 30.965219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.965900] [ 30.966125] Freed by task 213: [ 30.966551] kasan_save_stack+0x22/0x50 [ 30.967080] kasan_set_track+0x25/0x30 [ 30.967593] kasan_save_free_info+0x2b/0x50 [ 30.968153] __kasan_slab_free+0x10a/0x190 [ 30.968704] kmem_cache_free+0x10d/0x4d0 [ 30.969233] rcu_core+0x8c8/0x2860 [ 30.969693] __do_softirq+0x1b7/0x7d4 [ 30.970193] [ 30.970423] Last potentially related work creation: [ 30.971129] kasan_save_stack+0x22/0x50 [ 30.971644] __kasan_record_aux_stack+0x8e/0xa0 [ 30.972243] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.972923] remove_vma+0x139/0x170 [ 30.973396] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.973979] do_vmi_munmap+0x1f1/0x2b0 [ 30.974507] __vm_munmap+0x138/0x3a0 [ 30.974991] __x64_sys_munmap+0x59/0x80 [ 30.975507] do_syscall_64+0x3f/0x90 [ 30.976005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.976675] [ 30.976904] The buggy address belongs to the object at ffff888019ccf828 [ 30.976904] which belongs to the cache vm_area_struct of size 168 [ 30.978450] The buggy address is located 88 bytes inside of [ 30.978450] freed 168-byte region [ffff888019ccf828, ffff888019ccf8d0) [ 30.979879] [ 30.980095] The buggy address belongs to the physical page: [ 30.980755] page:00000000a6768524 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ccf [ 30.981872] memcg:ffff88801820b401 [ 30.982309] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.982962] page_type: 0xffffffff() [ 30.983424] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.984367] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801820b401 [ 30.985284] page dumped because: kasan: bad access detected [ 30.985947] [ 30.986167] Memory state around the buggy address: [ 30.986771] ffff888019ccf780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.987639] ffff888019ccf800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.988488] >ffff888019ccf880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.989325] ^ [ 30.989730] ffff888019ccf900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.990586] ffff888019ccf980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.991433] ================================================================== [ 30.992352] Disabling lock debugging due to kernel taint [ 32.830376] BUG: Bad rss-counter state mm:00000000fcb08c67 type:MM_FILEPAGES val:33 [ 32.831678] BUG: Bad rss-counter state mm:00000000fcb08c67 type:MM_ANONPAGES val:22 [ 33.388201] BUG: Bad rss-counter state mm:00000000c52cd226 type:MM_FILEPAGES val:33 [ 33.389142] BUG: Bad rss-counter state mm:00000000c52cd226 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10733' (ECDSA) to the list of known hosts. 2023/06/21 03:59:14 fuzzer started 2023/06/21 03:59:14 dialing manager at localhost:36067 2023/06/21 03:59:14 checking machine... 2023/06/21 03:59:14 checking revisions... [ 34.021985] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:59:14 testing simple program... [ 34.072552] cgroup: Unknown subsys name 'net' [ 34.109770] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:59:14 Registers: info registers vcpu 0 RAX=0000000000000066 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000066 RDI=ffffffff8450cc5a RBP=ffff88800fe1ff58 RSP=ffff88800fe1ff28 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000066 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff84511f72 RFL=00000046 [---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 00007fa27e03c900 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=00007ffd8affa000 CR3=00000000094ae000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007fdccf1e2fc0 CR3=000000000c4d6000 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=a13cd96d729b088b6a47a8a523101e9c XMM02=000000000011bc70ec2efd57dc4c00df XMM03=0000000000122a50b04b910ab537412d XMM04=1b4495a87e1a3e0400000000000ae988 XMM05=f5adb1c6f82a44070000000000132da0 XMM06=4fda316b135da52b0000000000132798 XMM07=e042d86d42eb936e0000000000122cd0 XMM08=b04b910ab537412d000000000011bcd0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000