syzkaller login: [ 46.042510] BUG: Bad rss-counter state mm:00000000430cce32 type:MM_FILEPAGES val:33 [ 46.043713] BUG: Bad rss-counter state mm:00000000430cce32 type:MM_ANONPAGES val:22 [ 46.222644] ================================================================== [ 46.223679] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.224787] Read of size 8 at addr ffff88800966d880 by task sshd/219 [ 46.225612] [ 46.225842] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.226795] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.227836] Call Trace: [ 46.228176] [ 46.228480] dump_stack_lvl+0x91/0xf0 [ 46.228998] print_report+0xcc/0x620 [ 46.229518] ? __virt_addr_valid+0x102/0x340 [ 46.230102] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.230771] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.231426] kasan_report+0xbe/0xf0 [ 46.231933] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.232607] vma_interval_tree_remove+0xc75/0xec0 [ 46.233274] vma_prepare+0xc54/0x11a0 [ 46.233806] __split_vma+0x5af/0x950 [ 46.234346] ? __pfx___split_vma+0x10/0x10 [ 46.234941] ? find_held_lock+0x2c/0x110 [ 46.235521] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.236144] ? lock_is_held_type+0x9f/0x120 [ 46.236742] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.237420] ? mtree_range_walk+0x632/0x900 [ 46.238029] ? mas_walk+0x5c7/0x7c0 [ 46.238586] do_vmi_munmap+0x1f1/0x2b0 [ 46.239135] mmap_region+0x1f9/0x2660 [ 46.239669] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.240238] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.241028] ? __pfx_lock_acquire+0x10/0x10 [ 46.241631] ? __pfx_mmap_region+0x10/0x10 [ 46.242220] ? security_mmap_addr+0x7d/0xa0 [ 46.242820] ? get_unmapped_area+0x1f5/0x3f0 [ 46.243426] do_mmap+0x854/0xf00 [ 46.243915] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.244466] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.245085] ksys_mmap_pgoff+0x3af/0x500 [ 46.245645] do_syscall_64+0x3f/0x90 [ 46.246177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.246905] RIP: 0033:0x7f9cf0909d82 [ 46.247416] 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 [ 46.249786] RSP: 002b:00007ffeb552f108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.250819] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9cf0909d82 [ 46.251772] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9cefd43000 [ 46.252716] RBP: 00007f9cefd43000 R08: 0000000000000009 R09: 0000000000001000 [ 46.253657] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556ab44fdec0 [ 46.254616] R13: 00007ffeb552f120 R14: 00007ffeb552f150 R15: 00007ffeb552f4b0 [ 46.255565] [ 46.255887] [ 46.256126] Allocated by task 212: [ 46.256600] kasan_save_stack+0x22/0x50 [ 46.257159] kasan_set_track+0x25/0x30 [ 46.257701] __kasan_slab_alloc+0x59/0x70 [ 46.258277] kmem_cache_alloc+0x16b/0x370 [ 46.258855] vm_area_dup+0x20/0x160 [ 46.259354] __split_vma+0x170/0x950 [ 46.259867] split_vma+0xc6/0x110 [ 46.260352] mprotect_fixup+0x8d2/0xb30 [ 46.260905] do_mprotect_pkey+0x87e/0xd40 [ 46.261479] __x64_sys_mprotect+0x78/0xc0 [ 46.262050] do_syscall_64+0x3f/0x90 [ 46.262602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.263313] [ 46.263551] Freed by task 212: [ 46.263981] kasan_save_stack+0x22/0x50 [ 46.264539] kasan_set_track+0x25/0x30 [ 46.265087] kasan_save_free_info+0x2b/0x50 [ 46.265677] __kasan_slab_free+0x10a/0x190 [ 46.266268] kmem_cache_free+0x10d/0x4d0 [ 46.266831] rcu_core+0x8c8/0x2860 [ 46.267326] __do_softirq+0x1b7/0x7d4 [ 46.267849] [ 46.268084] Last potentially related work creation: [ 46.268732] kasan_save_stack+0x22/0x50 [ 46.269288] __kasan_record_aux_stack+0x8e/0xa0 [ 46.269911] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.270637] remove_vma+0x139/0x170 [ 46.271135] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.271748] do_vmi_munmap+0x1f1/0x2b0 [ 46.272281] __vm_munmap+0x138/0x3a0 [ 46.272796] __x64_sys_munmap+0x59/0x80 [ 46.273347] do_syscall_64+0x3f/0x90 [ 46.273868] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.274606] [ 46.274841] The buggy address belongs to the object at ffff88800966d828 [ 46.274841] which belongs to the cache vm_area_struct of size 168 [ 46.276464] The buggy address is located 88 bytes inside of [ 46.276464] freed 168-byte region [ffff88800966d828, ffff88800966d8d0) [ 46.278023] [ 46.278269] The buggy address belongs to the physical page: [ 46.279009] page:000000005e479394 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x966d [ 46.280221] memcg:ffff88800ec3c401 [ 46.280694] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.281408] page_type: 0xffffffff() [ 46.281906] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 46.282939] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec3c401 [ 46.283941] page dumped because: kasan: bad access detected [ 46.284676] [ 46.284917] Memory state around the buggy address: [ 46.285574] ffff88800966d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 46.286534] ffff88800966d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 46.287484] >ffff88800966d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 46.288429] ^ [ 46.288878] ffff88800966d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.289825] ffff88800966d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 46.290777] ================================================================== [ 46.291906] Disabling lock debugging due to kernel taint [ 48.034801] BUG: Bad rss-counter state mm:0000000090ed0164 type:MM_FILEPAGES val:33 [ 48.035835] BUG: Bad rss-counter state mm:0000000090ed0164 type:MM_ANONPAGES val:22 [ 48.588477] BUG: Bad rss-counter state mm:00000000973941e1 type:MM_FILEPAGES val:33 [ 48.589464] BUG: Bad rss-counter state mm:00000000973941e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31489' (ECDSA) to the list of known hosts. 2023/06/19 15:08:08 fuzzer started 2023/06/19 15:08:08 dialing manager at localhost:44161 2023/06/19 15:08:08 checking machine... 2023/06/19 15:08:08 checking revisions... [ 49.174116] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:08:08 testing simple program... [ 49.212107] cgroup: Unknown subsys name 'net' [ 49.254413] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:07:53 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffe728b8748 CR3=0000000005482000 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=00007f942b392510000055a6a0296790 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=ffffffff86137dd3 RBX=0000000000000002 RCX=ffffffff86137dd2 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86137dd6 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020f00 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09df8 R15=ffff88806cf09a98 RIP=ffffffff81130b8f RFL=00000293 [--S-A-C] 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 00007fbd69309900 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=00007f8ed62ef650 CR3=000000000c5fe000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9cafa24f54ece4d100000000000ae988 XMM05=22c1ada4a5540fec0000000000135a08 XMM06=806171799158d96700000000001347f8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000