syzkaller login: [ 30.784661] BUG: Bad rss-counter state mm:00000000698a73bd type:MM_FILEPAGES val:33 [ 30.785874] BUG: Bad rss-counter state mm:00000000698a73bd type:MM_ANONPAGES val:22 [ 30.824193] ================================================================== [ 30.825208] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.826140] Read of size 8 at addr ffff88800f533798 by task sshd/221 [ 30.826909] [ 30.827127] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.828021] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.829006] Call Trace: [ 30.829330] [ 30.829613] dump_stack_lvl+0x91/0xf0 [ 30.830106] print_report+0xcc/0x620 [ 30.830586] ? __virt_addr_valid+0x102/0x340 [ 30.831142] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.831780] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.832505] kasan_report+0xbe/0xf0 [ 30.833033] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.833657] vma_interval_tree_remove+0xc75/0xec0 [ 30.834264] vma_prepare+0xc54/0x11a0 [ 30.834747] __split_vma+0x5af/0x950 [ 30.835217] ? __pfx___split_vma+0x10/0x10 [ 30.835777] ? find_held_lock+0x2c/0x110 [ 30.836294] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.836860] ? lock_is_held_type+0x9f/0x120 [ 30.837406] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.838011] ? mtree_range_walk+0x632/0x900 [ 30.838571] ? mas_walk+0x5c7/0x7c0 [ 30.839045] do_vmi_munmap+0x1f1/0x2b0 [ 30.839556] mmap_region+0x1f9/0x2660 [ 30.840037] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.840549] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.841266] ? __pfx_lock_acquire+0x10/0x10 [ 30.841802] ? __pfx_mmap_region+0x10/0x10 [ 30.842338] ? security_mmap_addr+0x7d/0xa0 [ 30.842870] ? get_unmapped_area+0x1f5/0x3f0 [ 30.843418] do_mmap+0x854/0xf00 [ 30.843877] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.844378] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.844943] ksys_mmap_pgoff+0x3af/0x500 [ 30.845450] do_syscall_64+0x3f/0x90 [ 30.845935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.846587] RIP: 0033:0x7f08b5eabd82 [ 30.847044] 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 [ 30.849184] RSP: 002b:00007ffffaa98f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.850097] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f08b5eabd82 [ 30.850944] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f08b52e5000 [ 30.851806] RBP: 00007f08b52e5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.852657] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558b91c43d90 [ 30.853507] R13: 00007ffffaa98fa0 R14: 00007ffffaa98fd0 R15: 00007ffffaa99330 [ 30.854371] [ 30.854665] [ 30.854886] Allocated by task 214: [ 30.855314] kasan_save_stack+0x22/0x50 [ 30.855833] kasan_set_track+0x25/0x30 [ 30.856359] __kasan_slab_alloc+0x59/0x70 [ 30.856879] kmem_cache_alloc+0x16b/0x370 [ 30.857399] vm_area_dup+0x20/0x160 [ 30.857852] __split_vma+0x170/0x950 [ 30.858314] split_vma+0xc6/0x110 [ 30.858749] mprotect_fixup+0x8d2/0xb30 [ 30.859243] do_mprotect_pkey+0x87e/0xd40 [ 30.859774] __x64_sys_mprotect+0x78/0xc0 [ 30.860288] do_syscall_64+0x3f/0x90 [ 30.860762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.861405] [ 30.861621] Freed by task 210: [ 30.862012] kasan_save_stack+0x22/0x50 [ 30.862510] kasan_set_track+0x25/0x30 [ 30.863003] kasan_save_free_info+0x2b/0x50 [ 30.863535] __kasan_slab_free+0x10a/0x190 [ 30.864110] kmem_cache_free+0x10d/0x4d0 [ 30.864622] rcu_core+0x8c8/0x2860 [ 30.865065] __do_softirq+0x1b7/0x7d4 [ 30.865550] [ 30.865766] Last potentially related work creation: [ 30.866355] kasan_save_stack+0x22/0x50 [ 30.866855] __kasan_record_aux_stack+0x8e/0xa0 [ 30.867429] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.868090] remove_vma+0x139/0x170 [ 30.868547] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.869104] do_vmi_munmap+0x1f1/0x2b0 [ 30.869594] __vm_munmap+0x138/0x3a0 [ 30.870059] __x64_sys_munmap+0x59/0x80 [ 30.870551] do_syscall_64+0x3f/0x90 [ 30.871032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.871687] [ 30.871906] The buggy address belongs to the object at ffff88800f533740 [ 30.871906] which belongs to the cache vm_area_struct of size 168 [ 30.873367] The buggy address is located 88 bytes inside of [ 30.873367] freed 168-byte region [ffff88800f533740, ffff88800f5337e8) [ 30.874870] [ 30.875087] The buggy address belongs to the physical page: [ 30.875773] page:000000001465546e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf533 [ 30.876858] memcg:ffff888010302b01 [ 30.877292] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.877950] page_type: 0xffffffff() [ 30.878404] raw: 0100000000000200 ffff8880087a0c80 ffffea0000316880 dead000000000006 [ 30.879323] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010302b01 [ 30.880246] page dumped because: kasan: bad access detected [ 30.880914] [ 30.881134] Memory state around the buggy address: [ 30.881718] ffff88800f533680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.882575] ffff88800f533700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.883435] >ffff88800f533780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.884292] ^ [ 30.884794] ffff88800f533800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.885645] ffff88800f533880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.886501] ================================================================== [ 30.887428] Disabling lock debugging due to kernel taint [ 33.268326] BUG: Bad rss-counter state mm:00000000eee491f1 type:MM_FILEPAGES val:33 [ 33.269728] BUG: Bad rss-counter state mm:00000000eee491f1 type:MM_ANONPAGES val:22 [ 33.737544] BUG: Bad rss-counter state mm:00000000c2feb0b7 type:MM_FILEPAGES val:33 [ 33.738690] BUG: Bad rss-counter state mm:00000000c2feb0b7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36430' (ECDSA) to the list of known hosts. 2023/06/20 16:11:08 fuzzer started 2023/06/20 16:11:08 dialing manager at localhost:36067 2023/06/20 16:11:08 checking machine... 2023/06/20 16:11:08 checking revisions... [ 34.348133] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:11:08 testing simple program... [ 34.399085] cgroup: Unknown subsys name 'net' [ 34.437712] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:11:08 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000002 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff81810711 RBP=0000000000000003 RSP=ffff88806ce09e60 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88806ce09ee8 R14=ffff88806ce35000 R15=ffff88800deac7a0 RIP=ffffffff81809aef RFL=00000202 [-------] 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 00007f5be3bae700 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=00007f426c95e650 CR3=0000000016498000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a38383439352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383834 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=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=00007fee1d1ab9c0 CR3=000000000d776000 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=4528c2a200ab408ed9484e96c381583c XMM02=000000000011d440d59e07bde36eea69 XMM03=000000000011d568ec2efd57dc4c00df XMM04=58254254299ead9900000000000ae988 XMM05=f5441c8fb8ed58f50000000000132c30 XMM06=00c3ffa147b8d8570000000000131a20 XMM07=fb795ef6d65770560000000000121cd0 XMM08=2c67c8bc2e329bc3000000000011d568 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000