syzkaller login: [ 31.769146] BUG: Bad rss-counter state mm:000000005b2abaae type:MM_FILEPAGES val:33 [ 31.770629] BUG: Bad rss-counter state mm:000000005b2abaae type:MM_ANONPAGES val:22 [ 31.936906] ================================================================== [ 31.937833] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.938780] Read of size 8 at addr ffff88800ef664e0 by task sshd/221 [ 31.939681] [ 31.939902] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.940792] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.941786] Call Trace: [ 31.942107] [ 31.942394] dump_stack_lvl+0x91/0xf0 [ 31.942886] print_report+0xcc/0x620 [ 31.943369] ? __virt_addr_valid+0x102/0x340 [ 31.943929] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.944588] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.945213] kasan_report+0xbe/0xf0 [ 31.945695] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.946363] vma_interval_tree_remove+0xc75/0xec0 [ 31.946976] vma_prepare+0xc54/0x11a0 [ 31.947454] __split_vma+0x5af/0x950 [ 31.947920] ? __pfx___split_vma+0x10/0x10 [ 31.948443] ? find_held_lock+0x2c/0x110 [ 31.948981] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.949552] ? lock_is_held_type+0x9f/0x120 [ 31.950095] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.950706] ? mtree_range_walk+0x632/0x900 [ 31.951254] ? mas_walk+0x5c7/0x7c0 [ 31.951736] do_vmi_munmap+0x1f1/0x2b0 [ 31.952229] mmap_region+0x1f9/0x2660 [ 31.952722] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.953230] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.953941] ? __pfx_lock_acquire+0x10/0x10 [ 31.954474] ? __pfx_mmap_region+0x10/0x10 [ 31.955000] ? security_mmap_addr+0x7d/0xa0 [ 31.955529] ? get_unmapped_area+0x1f5/0x3f0 [ 31.956082] do_mmap+0x854/0xf00 [ 31.956540] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.957042] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.957601] ksys_mmap_pgoff+0x3af/0x500 [ 31.958107] do_syscall_64+0x3f/0x90 [ 31.958580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.959224] RIP: 0033:0x7ff242ea0d82 [ 31.959682] 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 [ 31.961816] RSP: 002b:00007ffc5ade7be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.962717] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff242ea0d82 [ 31.963576] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff2422da000 [ 31.964433] RBP: 00007ff2422da000 R08: 0000000000000009 R09: 0000000000001000 [ 31.965298] R10: 0000000000000812 R11: 0000000000000206 R12: 00005604634c0d90 [ 31.966144] R13: 00007ffc5ade7c00 R14: 00007ffc5ade7c30 R15: 00007ffc5ade7f90 [ 31.967008] [ 31.967304] [ 31.967521] Allocated by task 214: [ 31.967953] kasan_save_stack+0x22/0x50 [ 31.968461] kasan_set_track+0x25/0x30 [ 31.968969] __kasan_slab_alloc+0x59/0x70 [ 31.969498] kmem_cache_alloc+0x16b/0x370 [ 31.970027] vm_area_dup+0x20/0x160 [ 31.970489] __split_vma+0x170/0x950 [ 31.970954] split_vma+0xc6/0x110 [ 31.971389] mprotect_fixup+0x8d2/0xb30 [ 31.971901] do_mprotect_pkey+0x87e/0xd40 [ 31.972415] __x64_sys_mprotect+0x78/0xc0 [ 31.972953] do_syscall_64+0x3f/0x90 [ 31.973427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.974066] [ 31.974286] Freed by task 19: [ 31.974669] kasan_save_stack+0x22/0x50 [ 31.975167] kasan_set_track+0x25/0x30 [ 31.975666] kasan_save_free_info+0x2b/0x50 [ 31.976195] __kasan_slab_free+0x10a/0x190 [ 31.976748] kmem_cache_free+0x10d/0x4d0 [ 31.977260] rcu_core+0x8c8/0x2860 [ 31.977708] __do_softirq+0x1b7/0x7d4 [ 31.978186] [ 31.978403] Last potentially related work creation: [ 31.978985] kasan_save_stack+0x22/0x50 [ 31.979482] __kasan_record_aux_stack+0x8e/0xa0 [ 31.980055] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.980705] remove_vma+0x139/0x170 [ 31.981158] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.981724] do_vmi_munmap+0x1f1/0x2b0 [ 31.982211] __vm_munmap+0x138/0x3a0 [ 31.982684] __x64_sys_munmap+0x59/0x80 [ 31.983177] do_syscall_64+0x3f/0x90 [ 31.983653] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.984297] [ 31.984527] The buggy address belongs to the object at ffff88800ef66488 [ 31.984527] which belongs to the cache vm_area_struct of size 168 [ 31.985980] The buggy address is located 88 bytes inside of [ 31.985980] freed 168-byte region [ffff88800ef66488, ffff88800ef66530) [ 31.987369] [ 31.987588] The buggy address belongs to the physical page: [ 31.988240] page:00000000f54f66b8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef66 [ 31.989323] memcg:ffff88800cf71501 [ 31.989746] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.990386] page_type: 0xffffffff() [ 31.990831] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.991736] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf71501 [ 31.992656] page dumped because: kasan: bad access detected [ 31.993307] [ 31.993528] Memory state around the buggy address: [ 31.994109] ffff88800ef66380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.994965] ffff88800ef66400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.995808] >ffff88800ef66480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.996700] ^ [ 31.997448] ffff88800ef66500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.998300] ffff88800ef66580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.999146] ================================================================== [ 32.000152] Disabling lock debugging due to kernel taint [ 34.184865] BUG: Bad rss-counter state mm:000000004eeb0cfa type:MM_FILEPAGES val:33 [ 34.185884] BUG: Bad rss-counter state mm:000000004eeb0cfa type:MM_ANONPAGES val:22 [ 34.683620] BUG: Bad rss-counter state mm:000000006add9329 type:MM_FILEPAGES val:33 [ 34.685114] BUG: Bad rss-counter state mm:000000006add9329 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50654' (ECDSA) to the list of known hosts. 2023/06/19 20:17:48 fuzzer started 2023/06/19 20:17:48 dialing manager at localhost:44161 2023/06/19 20:17:48 checking machine... 2023/06/19 20:17:48 checking revisions... [ 35.433388] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:17:48 testing simple program... [ 35.487561] cgroup: Unknown subsys name 'net' [ 35.542454] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:17:46 Registers: info registers vcpu 0 RAX=ffff88800f45e000 RBX=ffff888016242a50 RCX=0000000000000000 RDX=0000000000000007 RSI=ffffffff816b656c RDI=ffff88800f45e044 RBP=ffffea00005e0ac0 RSP=ffff8880145879d0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6c88 R12=0000000000000293 R13=ffff888016242c80 R14=0000000000000003 R15=0000000000000001 RIP=ffffffff81655e78 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f45f930b900 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=00007f45f8704a40 CR3=000000000c4cc000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c4e0f279ddcf4f1e00000000000ae988 XMM05=abed32597ee793640000000000135008 XMM06=c291bd5c70af25b90000000000133df8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff8449ee3e RDX=ffff888018c5d1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffffffff84e38f80 RSP=ffff88800cb0fcb0 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=0000000000000000 R12=0000000000000001 R13=0000000000000005 R14=0000000000000003 R15=00007ffad8005fff RIP=ffffffff814c01fc 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ffad7466900 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=00007ffad7fd73ec CR3=000000000eff0000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000