syzkaller login: [ 30.837762] BUG: Bad rss-counter state mm:000000004bced762 type:MM_FILEPAGES val:33 [ 30.838947] BUG: Bad rss-counter state mm:000000004bced762 type:MM_ANONPAGES val:22 [ 30.879064] ================================================================== [ 30.880111] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.881179] Read of size 8 at addr ffff888014602798 by task sshd/220 [ 30.882159] [ 30.882698] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.883692] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.884694] Call Trace: [ 30.885035] [ 30.885428] dump_stack_lvl+0x91/0xf0 [ 30.885972] print_report+0xcc/0x620 [ 30.886471] ? __virt_addr_valid+0x102/0x340 [ 30.887019] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.887636] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.888246] kasan_report+0xbe/0xf0 [ 30.888722] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.889341] vma_interval_tree_remove+0xc75/0xec0 [ 30.889933] vma_prepare+0xc54/0x11a0 [ 30.890434] __split_vma+0x5af/0x950 [ 30.890902] ? __pfx___split_vma+0x10/0x10 [ 30.891431] ? find_held_lock+0x2c/0x110 [ 30.891955] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.892510] ? lock_is_held_type+0x9f/0x120 [ 30.893047] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.893649] ? mtree_range_walk+0x632/0x900 [ 30.894214] ? mas_walk+0x5c7/0x7c0 [ 30.894700] do_vmi_munmap+0x1f1/0x2b0 [ 30.895202] mmap_region+0x1f9/0x2660 [ 30.895686] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.896192] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.896909] ? __pfx_lock_acquire+0x10/0x10 [ 30.897449] ? __pfx_mmap_region+0x10/0x10 [ 30.897986] ? security_mmap_addr+0x7d/0xa0 [ 30.898532] ? get_unmapped_area+0x1f5/0x3f0 [ 30.899088] do_mmap+0x854/0xf00 [ 30.899533] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.900033] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.900607] ksys_mmap_pgoff+0x3af/0x500 [ 30.901116] do_syscall_64+0x3f/0x90 [ 30.901599] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.902252] RIP: 0033:0x7f6826623d82 [ 30.902731] 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 [ 30.904851] RSP: 002b:00007ffc16d8cde8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.905752] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6826623d82 [ 30.906607] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6825a5d000 [ 30.907444] RBP: 00007f6825a5d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.908292] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e8bf592b20 [ 30.909130] R13: 00007ffc16d8ce00 R14: 00007ffc16d8ce30 R15: 00007ffc16d8d190 [ 30.909981] [ 30.910272] [ 30.910515] Allocated by task 213: [ 30.910951] kasan_save_stack+0x22/0x50 [ 30.911457] kasan_set_track+0x25/0x30 [ 30.911952] __kasan_slab_alloc+0x59/0x70 [ 30.912487] kmem_cache_alloc+0x16b/0x370 [ 30.913008] vm_area_dup+0x20/0x160 [ 30.913462] __split_vma+0x170/0x950 [ 30.913927] split_vma+0xc6/0x110 [ 30.914369] mprotect_fixup+0x8d2/0xb30 [ 30.914868] do_mprotect_pkey+0x87e/0xd40 [ 30.915385] __x64_sys_mprotect+0x78/0xc0 [ 30.915905] do_syscall_64+0x3f/0x90 [ 30.916380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.917020] [ 30.917237] Freed by task 213: [ 30.917631] kasan_save_stack+0x22/0x50 [ 30.918138] kasan_set_track+0x25/0x30 [ 30.918649] kasan_save_free_info+0x2b/0x50 [ 30.919176] __kasan_slab_free+0x10a/0x190 [ 30.919706] kmem_cache_free+0x10d/0x4d0 [ 30.920208] rcu_core+0x8c8/0x2860 [ 30.920655] __do_softirq+0x1b7/0x7d4 [ 30.921132] [ 30.921354] Last potentially related work creation: [ 30.921936] kasan_save_stack+0x22/0x50 [ 30.922463] __kasan_record_aux_stack+0x8e/0xa0 [ 30.923032] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.923672] remove_vma+0x139/0x170 [ 30.924163] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.924723] do_vmi_munmap+0x1f1/0x2b0 [ 30.925204] __vm_munmap+0x138/0x3a0 [ 30.925675] __x64_sys_munmap+0x59/0x80 [ 30.926173] do_syscall_64+0x3f/0x90 [ 30.926660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.927303] [ 30.927524] The buggy address belongs to the object at ffff888014602740 [ 30.927524] which belongs to the cache vm_area_struct of size 168 [ 30.929003] The buggy address is located 88 bytes inside of [ 30.929003] freed 168-byte region [ffff888014602740, ffff8880146027e8) [ 30.930419] [ 30.930639] The buggy address belongs to the physical page: [ 30.931293] page:000000000dc8b8b0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14602 [ 30.932382] memcg:ffff88800e2c6601 [ 30.932810] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.933455] page_type: 0xffffffff() [ 30.933910] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.934866] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2c6601 [ 30.935796] page dumped because: kasan: bad access detected [ 30.936468] [ 30.936687] Memory state around the buggy address: [ 30.937273] ffff888014602680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.938136] ffff888014602700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.939010] >ffff888014602780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.939868] ^ [ 30.940364] ffff888014602800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.941240] ffff888014602880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.942099] ================================================================== [ 30.943158] Disabling lock debugging due to kernel taint [ 33.359143] BUG: Bad rss-counter state mm:00000000c78e1983 type:MM_FILEPAGES val:33 [ 33.360318] BUG: Bad rss-counter state mm:00000000c78e1983 type:MM_ANONPAGES val:22 [ 33.866744] BUG: Bad rss-counter state mm:00000000ca0e2736 type:MM_FILEPAGES val:33 [ 33.867918] BUG: Bad rss-counter state mm:00000000ca0e2736 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29520' (ECDSA) to the list of known hosts. 2023/06/20 20:42:45 fuzzer started 2023/06/20 20:42:46 dialing manager at localhost:36067 2023/06/20 20:42:46 checking machine... 2023/06/20 20:42:46 checking revisions... [ 34.536569] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:42:46 testing simple program... [ 34.582320] cgroup: Unknown subsys name 'net' [ 34.636906] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:42:45 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000560669a65900 RDX=0000000000000000 RSI=0000000000000001 RDI=ffff88800c6615ac RBP=ffff88800c661540 RSP=ffff888014667c88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=ffff88800c661558 R13=ffff88800c661560 R14=dffffc0000000000 R15=0000560669a5f620 RIP=ffffffff8450c48d RFL=00040246 [---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 00007f462b733900 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=00007ffcef850258 CR3=000000000d794000 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=00007fb74229e510000055745d76c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff8180c6a1 RDX=00000000000080c6 RSI=00000000000080c6 RDI=ffffffff86509d08 RBP=ffff88800d747750 RSP=ffff88800d747688 R8 =0000000000000000 R9 =ffff88800d747738 R10=0000000000038001 R11=0000000000020d8f R12=ffff88800d747758 R13=ffff88800d747740 R14=ffff88800d747739 R15=ffff88800d7476f8 RIP=ffffffff811307c2 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 00007f421fafd900 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=00007fff87cfe000 CR3=000000000dfb4000 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=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