syzkaller login: [ 31.694753] BUG: Bad rss-counter state mm:0000000061b50aac type:MM_FILEPAGES val:33 [ 31.696222] BUG: Bad rss-counter state mm:0000000061b50aac type:MM_ANONPAGES val:22 [ 31.854112] ================================================================== [ 31.854990] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.855869] Read of size 8 at addr ffff88800c5194e0 by task sshd/222 [ 31.856586] [ 31.856797] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.857729] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.858648] Call Trace: [ 31.858953] [ 31.859222] dump_stack_lvl+0x91/0xf0 [ 31.859688] print_report+0xcc/0x620 [ 31.860153] ? __virt_addr_valid+0x102/0x340 [ 31.860671] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.861252] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.861843] kasan_report+0xbe/0xf0 [ 31.862296] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.862896] vma_interval_tree_remove+0xc75/0xec0 [ 31.863487] vma_prepare+0xc54/0x11a0 [ 31.863946] __split_vma+0x5af/0x950 [ 31.864394] ? __pfx___split_vma+0x10/0x10 [ 31.864896] ? find_held_lock+0x2c/0x110 [ 31.865389] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.865971] ? lock_is_held_type+0x9f/0x120 [ 31.866489] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.867067] ? mtree_range_walk+0x632/0x900 [ 31.867595] ? mas_walk+0x5c7/0x7c0 [ 31.868051] do_vmi_munmap+0x1f1/0x2b0 [ 31.868520] mmap_region+0x1f9/0x2660 [ 31.868978] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.869460] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.870194] ? __pfx_lock_acquire+0x10/0x10 [ 31.870700] ? __pfx_mmap_region+0x10/0x10 [ 31.871209] ? security_mmap_addr+0x7d/0xa0 [ 31.871711] ? get_unmapped_area+0x1f5/0x3f0 [ 31.872239] do_mmap+0x854/0xf00 [ 31.872672] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.873173] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.873733] ksys_mmap_pgoff+0x3af/0x500 [ 31.874244] do_syscall_64+0x3f/0x90 [ 31.874727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.875372] RIP: 0033:0x7f64d0134d82 [ 31.875832] 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 [ 31.877974] RSP: 002b:00007ffdc296fce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.878884] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f64d0134d82 [ 31.879739] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f64cf56e000 [ 31.880582] RBP: 00007f64cf56e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.881423] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b264bbaf70 [ 31.882266] R13: 00007ffdc296fd00 R14: 00007ffdc296fd30 R15: 00007ffdc2970090 [ 31.883114] [ 31.883400] [ 31.883615] Allocated by task 215: [ 31.884048] kasan_save_stack+0x22/0x50 [ 31.884550] kasan_set_track+0x25/0x30 [ 31.885037] __kasan_slab_alloc+0x59/0x70 [ 31.885554] kmem_cache_alloc+0x16b/0x370 [ 31.886081] vm_area_dup+0x20/0x160 [ 31.886531] __split_vma+0x170/0x950 [ 31.887006] split_vma+0xc6/0x110 [ 31.887441] mprotect_fixup+0x8d2/0xb30 [ 31.887942] do_mprotect_pkey+0x87e/0xd40 [ 31.888457] __x64_sys_mprotect+0x78/0xc0 [ 31.888974] do_syscall_64+0x3f/0x90 [ 31.889446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.890096] [ 31.890315] Freed by task 215: [ 31.890709] kasan_save_stack+0x22/0x50 [ 31.891197] kasan_set_track+0x25/0x30 [ 31.891683] kasan_save_free_info+0x2b/0x50 [ 31.892217] __kasan_slab_free+0x10a/0x190 [ 31.892739] kmem_cache_free+0x10d/0x4d0 [ 31.893236] rcu_core+0x8c8/0x2860 [ 31.893675] __do_softirq+0x1b7/0x7d4 [ 31.894154] [ 31.894371] Last potentially related work creation: [ 31.894953] kasan_save_stack+0x22/0x50 [ 31.895451] __kasan_record_aux_stack+0x8e/0xa0 [ 31.896020] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.896662] remove_vma+0x139/0x170 [ 31.897109] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.897657] do_vmi_munmap+0x1f1/0x2b0 [ 31.898163] __vm_munmap+0x138/0x3a0 [ 31.898627] __x64_sys_munmap+0x59/0x80 [ 31.899120] do_syscall_64+0x3f/0x90 [ 31.899604] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.900240] [ 31.900456] The buggy address belongs to the object at ffff88800c519488 [ 31.900456] which belongs to the cache vm_area_struct of size 168 [ 31.901944] The buggy address is located 88 bytes inside of [ 31.901944] freed 168-byte region [ffff88800c519488, ffff88800c519530) [ 31.903361] [ 31.903578] The buggy address belongs to the physical page: [ 31.904236] page:0000000057844fd8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc519 [ 31.905295] memcg:ffff88801a0bd401 [ 31.905724] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.906367] page_type: 0xffffffff() [ 31.906814] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.907720] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0bd401 [ 31.908631] page dumped because: kasan: bad access detected [ 31.909278] [ 31.909491] Memory state around the buggy address: [ 31.910083] ffff88800c519380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.910927] ffff88800c519400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.911779] >ffff88800c519480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.912621] ^ [ 31.913371] ffff88800c519500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.914222] ffff88800c519580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.915071] ================================================================== [ 31.916028] Disabling lock debugging due to kernel taint [ 33.814252] BUG: Bad rss-counter state mm:000000000f27dc41 type:MM_FILEPAGES val:33 [ 33.815255] BUG: Bad rss-counter state mm:000000000f27dc41 type:MM_ANONPAGES val:22 [ 34.225266] BUG: Bad rss-counter state mm:0000000079ecf3d2 type:MM_FILEPAGES val:33 [ 34.226060] BUG: Bad rss-counter state mm:0000000079ecf3d2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4272' (ECDSA) to the list of known hosts. 2023/06/21 03:52:59 fuzzer started 2023/06/21 03:52:59 dialing manager at localhost:36067 2023/06/21 03:52:59 checking machine... 2023/06/21 03:52:59 checking revisions... [ 34.865230] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:52:59 testing simple program... [ 34.909058] cgroup: Unknown subsys name 'net' [ 34.949227] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:52:59 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88800eecfd28 RSI=ffff88800eecfd08 RDI=ffff88800eecf9c0 RBP=ffff88800eecfa48 RSP=ffff88800eecf9a0 R8 =0000000000000001 R9 =ffff88800eecf9f0 R10=0000000000038001 R11=0000000000020ed2 R12=ffff88800eecfa78 R13=0000000000000000 R14=ffff8880146f0000 R15=ffff88800eecf9b0 RIP=ffffffff81130937 RFL=00000286 [--S--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 00007f8d07a79900 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=00007ffcb823c000 CR3=000000000ede2000 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=00007f60eece5820 CR3=000000000cc9e000 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=83bd953d627073946b4f42e732977c0d XMM02=2c67c8bc2e329bc3000000000011b460 XMM03=fb795ef6d65770560000000000122570 XMM04=ea663c457a9bb01700000000000ae988 XMM05=f6afe2cab4e61e040000000000132650 XMM06=00c3ffa147b8d85700000000001322d8 XMM07=e042d86d42eb936e00000000001227f0 XMM08=c13cd168c2013244000000000011b4c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000