syzkaller login: [ 31.109004] BUG: Bad rss-counter state mm:00000000471aba91 type:MM_FILEPAGES val:33 [ 31.110229] BUG: Bad rss-counter state mm:00000000471aba91 type:MM_ANONPAGES val:22 [ 31.149501] ================================================================== [ 31.150583] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.151725] Read of size 8 at addr ffff888016686b38 by task sshd/220 [ 31.152618] [ 31.152847] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.153893] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.155071] Call Trace: [ 31.155431] [ 31.155783] dump_stack_lvl+0x91/0xf0 [ 31.156365] print_report+0xcc/0x620 [ 31.156920] ? __virt_addr_valid+0x102/0x340 [ 31.157569] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.158287] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.159017] kasan_report+0xbe/0xf0 [ 31.159603] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.160348] vma_interval_tree_remove+0xc75/0xec0 [ 31.161123] vma_prepare+0xc54/0x11a0 [ 31.161707] __split_vma+0x5af/0x950 [ 31.162297] ? __pfx___split_vma+0x10/0x10 [ 31.162928] ? find_held_lock+0x2c/0x110 [ 31.163546] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.164215] ? lock_is_held_type+0x9f/0x120 [ 31.164888] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.165564] ? mtree_range_walk+0x632/0x900 [ 31.166273] ? mas_walk+0x5c7/0x7c0 [ 31.166792] do_vmi_munmap+0x1f1/0x2b0 [ 31.167346] mmap_region+0x1f9/0x2660 [ 31.167874] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.168437] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.169222] ? __pfx_lock_acquire+0x10/0x10 [ 31.169806] ? __pfx_mmap_region+0x10/0x10 [ 31.170386] ? security_mmap_addr+0x7d/0xa0 [ 31.170994] ? get_unmapped_area+0x1f5/0x3f0 [ 31.171597] do_mmap+0x854/0xf00 [ 31.172086] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.172632] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.173248] ksys_mmap_pgoff+0x3af/0x500 [ 31.173802] do_syscall_64+0x3f/0x90 [ 31.174328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.175051] RIP: 0033:0x7fa0cb8c5d82 [ 31.175555] 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 [ 31.177886] RSP: 002b:00007fff8bc6c6e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.178906] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa0cb8c5d82 [ 31.179839] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa0cacff000 [ 31.180773] RBP: 00007fa0cacff000 R08: 0000000000000009 R09: 0000000000001000 [ 31.181710] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fcccd7bec0 [ 31.182645] R13: 00007fff8bc6c700 R14: 00007fff8bc6c730 R15: 00007fff8bc6ca90 [ 31.183591] [ 31.183912] [ 31.184148] Allocated by task 213: [ 31.184620] kasan_save_stack+0x22/0x50 [ 31.185173] kasan_set_track+0x25/0x30 [ 31.185722] __kasan_slab_alloc+0x59/0x70 [ 31.186305] kmem_cache_alloc+0x16b/0x370 [ 31.186877] vm_area_dup+0x20/0x160 [ 31.187377] __split_vma+0x170/0x950 [ 31.187891] split_vma+0xc6/0x110 [ 31.188378] mprotect_fixup+0x8d2/0xb30 [ 31.188936] do_mprotect_pkey+0x87e/0xd40 [ 31.189518] __x64_sys_mprotect+0x78/0xc0 [ 31.190093] do_syscall_64+0x3f/0x90 [ 31.190616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.191332] [ 31.191572] Freed by task 203: [ 31.192003] kasan_save_stack+0x22/0x50 [ 31.192555] kasan_set_track+0x25/0x30 [ 31.193101] kasan_save_free_info+0x2b/0x50 [ 31.193685] __kasan_slab_free+0x10a/0x190 [ 31.194274] kmem_cache_free+0x10d/0x4d0 [ 31.194887] rcu_core+0x8c8/0x2860 [ 31.195377] __do_softirq+0x1b7/0x7d4 [ 31.195902] [ 31.196143] Last potentially related work creation: [ 31.196786] kasan_save_stack+0x22/0x50 [ 31.197344] __kasan_record_aux_stack+0x8e/0xa0 [ 31.197976] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.198676] remove_vma+0x139/0x170 [ 31.199182] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.199791] do_vmi_munmap+0x1f1/0x2b0 [ 31.200327] __vm_munmap+0x138/0x3a0 [ 31.200842] __x64_sys_munmap+0x59/0x80 [ 31.201391] do_syscall_64+0x3f/0x90 [ 31.201912] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.202625] [ 31.202878] The buggy address belongs to the object at ffff888016686ae0 [ 31.202878] which belongs to the cache vm_area_struct of size 168 [ 31.204498] The buggy address is located 88 bytes inside of [ 31.204498] freed 168-byte region [ffff888016686ae0, ffff888016686b88) [ 31.206047] [ 31.206283] The buggy address belongs to the physical page: [ 31.207028] page:0000000086f98a08 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16686 [ 31.208230] memcg:ffff88800ed21001 [ 31.208698] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.209411] page_type: 0xffffffff() [ 31.209902] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ac800 dead000000000004 [ 31.210910] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed21001 [ 31.211917] page dumped because: kasan: bad access detected [ 31.212646] [ 31.212882] Memory state around the buggy address: [ 31.213530] ffff888016686a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.214470] ffff888016686a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.215437] >ffff888016686b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.216376] ^ [ 31.217046] ffff888016686b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 31.217977] ffff888016686c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.218915] ================================================================== [ 31.219969] Disabling lock debugging due to kernel taint [ 33.470103] BUG: Bad rss-counter state mm:0000000032e75d96 type:MM_FILEPAGES val:33 [ 33.471296] BUG: Bad rss-counter state mm:0000000032e75d96 type:MM_ANONPAGES val:22 [ 33.945274] BUG: Bad rss-counter state mm:000000006e502fd9 type:MM_FILEPAGES val:33 [ 33.946260] BUG: Bad rss-counter state mm:000000006e502fd9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41599' (ECDSA) to the list of known hosts. 2023/06/20 22:42:15 fuzzer started 2023/06/20 22:42:15 dialing manager at localhost:36067 2023/06/20 22:42:15 checking machine... 2023/06/20 22:42:15 checking revisions... [ 34.651320] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:42:15 testing simple program... [ 34.695270] cgroup: Unknown subsys name 'net' [ 34.738765] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:42:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=000000000000000e RDI=ffff888015bd5b40 RBP=ffffffff849f0540 RSP=ffff8880180dfb48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000000000000000e R13=ffff888015bd51c0 R14=ffff888015bd51c0 R15=ffff8880180dfcd8 RIP=ffffffff8122e857 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 00007f80b6b87700 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=00007f284ce29ad0 CR3=000000000e230000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363435 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff85d3e490 RBX=ffffffff85d3e490 RCX=0000000000000009 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88806cf09c48 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff88806cf09ff8 R12=ffffffff85d3d41c R13=ffff88806cf3a2c0 R14=1ffff1100d9e139c R15=0000000000000000 RIP=ffffffff8135ba38 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 00007f80b6385700 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=00007fffde40f000 CR3=000000000e230000 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=2035313a32343a3232203032206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a363435373320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a32343a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000