syzkaller login: [ 31.167444] BUG: Bad rss-counter state mm:00000000a37e130e type:MM_FILEPAGES val:33 [ 31.168888] BUG: Bad rss-counter state mm:00000000a37e130e type:MM_ANONPAGES val:22 [ 31.328448] ================================================================== [ 31.329352] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.330292] Read of size 8 at addr ffff888014747058 by task sshd/219 [ 31.331064] [ 31.331361] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.332240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.333244] Call Trace: [ 31.333575] [ 31.333861] dump_stack_lvl+0x91/0xf0 [ 31.334359] print_report+0xcc/0x620 [ 31.334856] ? __virt_addr_valid+0x102/0x340 [ 31.335412] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.336037] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.336657] kasan_report+0xbe/0xf0 [ 31.337151] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.337779] vma_interval_tree_remove+0xc75/0xec0 [ 31.338401] vma_prepare+0xc54/0x11a0 [ 31.338901] __split_vma+0x5af/0x950 [ 31.339387] ? __pfx___split_vma+0x10/0x10 [ 31.339933] ? find_held_lock+0x2c/0x110 [ 31.340477] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.341053] ? lock_is_held_type+0x9f/0x120 [ 31.341662] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.342319] ? mtree_range_walk+0x632/0x900 [ 31.342921] ? mas_walk+0x5c7/0x7c0 [ 31.343446] do_vmi_munmap+0x1f1/0x2b0 [ 31.343997] mmap_region+0x1f9/0x2660 [ 31.344517] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.345098] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.345877] ? __pfx_lock_acquire+0x10/0x10 [ 31.346465] ? __pfx_mmap_region+0x10/0x10 [ 31.347035] ? security_mmap_addr+0x7d/0xa0 [ 31.347561] ? get_unmapped_area+0x1f5/0x3f0 [ 31.348120] do_mmap+0x854/0xf00 [ 31.348565] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.349063] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.349671] ksys_mmap_pgoff+0x3af/0x500 [ 31.350183] do_syscall_64+0x3f/0x90 [ 31.350668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.351317] RIP: 0033:0x7f4e51e46d82 [ 31.351780] 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 [ 31.353949] RSP: 002b:00007fff88861418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.354874] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4e51e46d82 [ 31.355732] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4e51280000 [ 31.356585] RBP: 00007f4e51280000 R08: 0000000000000009 R09: 0000000000001000 [ 31.357449] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b837156b20 [ 31.358294] R13: 00007fff88861430 R14: 00007fff88861460 R15: 00007fff888617c0 [ 31.359157] [ 31.359449] [ 31.359666] Allocated by task 212: [ 31.360094] kasan_save_stack+0x22/0x50 [ 31.360604] kasan_set_track+0x25/0x30 [ 31.361111] __kasan_slab_alloc+0x59/0x70 [ 31.361639] kmem_cache_alloc+0x16b/0x370 [ 31.362157] vm_area_dup+0x20/0x160 [ 31.362614] __split_vma+0x170/0x950 [ 31.363077] split_vma+0xc6/0x110 [ 31.363517] mprotect_fixup+0x8d2/0xb30 [ 31.364023] do_mprotect_pkey+0x87e/0xd40 [ 31.364543] __x64_sys_mprotect+0x78/0xc0 [ 31.365066] do_syscall_64+0x3f/0x90 [ 31.365554] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.366209] [ 31.366426] Freed by task 212: [ 31.366816] kasan_save_stack+0x22/0x50 [ 31.367319] kasan_set_track+0x25/0x30 [ 31.367816] kasan_save_free_info+0x2b/0x50 [ 31.368348] __kasan_slab_free+0x10a/0x190 [ 31.368880] kmem_cache_free+0x10d/0x4d0 [ 31.369402] rcu_core+0x8c8/0x2860 [ 31.369845] __do_softirq+0x1b7/0x7d4 [ 31.370320] [ 31.370541] Last potentially related work creation: [ 31.371120] kasan_save_stack+0x22/0x50 [ 31.371625] __kasan_record_aux_stack+0x8e/0xa0 [ 31.372196] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.372839] remove_vma+0x139/0x170 [ 31.373312] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.373877] do_vmi_munmap+0x1f1/0x2b0 [ 31.374365] __vm_munmap+0x138/0x3a0 [ 31.374832] __x64_sys_munmap+0x59/0x80 [ 31.375330] do_syscall_64+0x3f/0x90 [ 31.375805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.376463] [ 31.376677] The buggy address belongs to the object at ffff888014747000 [ 31.376677] which belongs to the cache vm_area_struct of size 168 [ 31.378174] The buggy address is located 88 bytes inside of [ 31.378174] freed 168-byte region [ffff888014747000, ffff8880147470a8) [ 31.379578] [ 31.379791] The buggy address belongs to the physical page: [ 31.380459] page:00000000fb1178f5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14747 [ 31.381547] memcg:ffff88801a075701 [ 31.381976] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.382616] page_type: 0xffffffff() [ 31.383073] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.383990] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a075701 [ 31.384888] page dumped because: kasan: bad access detected [ 31.385566] [ 31.385788] Memory state around the buggy address: [ 31.386359] ffff888014746f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.387258] ffff888014746f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.388115] >ffff888014747000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.388961] ^ [ 31.389690] ffff888014747080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.390547] ffff888014747100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.391397] ================================================================== [ 31.392491] Disabling lock debugging due to kernel taint [ 33.905809] BUG: Bad rss-counter state mm:00000000f17df578 type:MM_FILEPAGES val:33 [ 33.906634] BUG: Bad rss-counter state mm:00000000f17df578 type:MM_ANONPAGES val:22 [ 34.315414] BUG: Bad rss-counter state mm:00000000b363ff37 type:MM_FILEPAGES val:33 [ 34.316312] BUG: Bad rss-counter state mm:00000000b363ff37 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2304' (ECDSA) to the list of known hosts. 2023/06/21 00:47:28 fuzzer started 2023/06/21 00:47:29 dialing manager at localhost:36067 2023/06/21 00:47:29 checking machine... 2023/06/21 00:47:29 checking revisions... [ 35.018590] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:47:29 testing simple program... [ 35.058113] cgroup: Unknown subsys name 'net' [ 35.100541] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:47:28 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff88801470f638 RSP=ffff88801470f570 R8 =0000000000000001 R9 =ffffed10028e1eba R10=ffff88801470f5d7 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000002 [-------] 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 00007f5cbb24c900 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=00007fea17676650 CR3=0000000013a5e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=d97a36d0dbbaf39000000000000ae988 XMM05=49e13eb1e9dc0e210000000000132500 XMM06=806171799158d96700000000001312f0 XMM07=fb795ef6d65770560000000000121628 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000001255 RCX=0000000000000000 RDX=ffff888015efd1c0 RSI=ffffffff8171ad71 RDI=0000000000000007 RBP=ffff88800f0a8910 RSP=ffff88801459fe70 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000000 R12=0000000000100073 R13=00007fea17678618 R14=ffff88800f0a8920 R15=0000000000000002 RIP=ffffffff814c089b 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 00007fea170c1900 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=00007fea17678618 CR3=000000000f66a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000