syzkaller login: [ 38.998552] BUG: Bad rss-counter state mm:00000000718add3d type:MM_FILEPAGES val:33 [ 39.000490] BUG: Bad rss-counter state mm:00000000718add3d type:MM_ANONPAGES val:22 [ 39.160612] ================================================================== [ 39.161717] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.162701] Read of size 8 at addr ffff88800d609968 by task sshd/219 [ 39.163536] [ 39.163755] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.164616] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.165612] Call Trace: [ 39.165932] [ 39.166214] dump_stack_lvl+0x91/0xf0 [ 39.166707] print_report+0xcc/0x620 [ 39.167187] ? __virt_addr_valid+0x102/0x340 [ 39.167729] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.168334] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.168947] kasan_report+0xbe/0xf0 [ 39.169439] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.170060] vma_interval_tree_remove+0xc75/0xec0 [ 39.170668] vma_prepare+0xc54/0x11a0 [ 39.171146] __split_vma+0x5af/0x950 [ 39.171632] ? __pfx___split_vma+0x10/0x10 [ 39.172159] ? find_held_lock+0x2c/0x110 [ 39.172687] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.173278] ? lock_is_held_type+0x9f/0x120 [ 39.173830] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.174438] ? mtree_range_walk+0x632/0x900 [ 39.174988] ? mas_walk+0x5c7/0x7c0 [ 39.175476] do_vmi_munmap+0x1f1/0x2b0 [ 39.175972] mmap_region+0x1f9/0x2660 [ 39.176467] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.176987] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.177716] ? __pfx_lock_acquire+0x10/0x10 [ 39.178248] ? __pfx_mmap_region+0x10/0x10 [ 39.178781] ? security_mmap_addr+0x7d/0xa0 [ 39.179315] ? get_unmapped_area+0x1f5/0x3f0 [ 39.179863] do_mmap+0x854/0xf00 [ 39.180314] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.180805] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.181388] ksys_mmap_pgoff+0x3af/0x500 [ 39.181905] do_syscall_64+0x3f/0x90 [ 39.182398] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.183059] RIP: 0033:0x7f8629bd9d82 [ 39.183522] 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 [ 39.185698] RSP: 002b:00007fff953ecb08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.186610] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8629bd9d82 [ 39.187469] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8629013000 [ 39.188356] RBP: 00007f8629013000 R08: 0000000000000009 R09: 0000000000001000 [ 39.189277] R10: 0000000000000812 R11: 0000000000000206 R12: 000055763be7dec0 [ 39.190144] R13: 00007fff953ecb20 R14: 00007fff953ecb50 R15: 00007fff953eceb0 [ 39.190997] [ 39.191291] [ 39.191506] Allocated by task 212: [ 39.191929] kasan_save_stack+0x22/0x50 [ 39.192432] kasan_set_track+0x25/0x30 [ 39.192920] __kasan_slab_alloc+0x59/0x70 [ 39.193457] kmem_cache_alloc+0x16b/0x370 [ 39.193984] vm_area_dup+0x20/0x160 [ 39.194448] __split_vma+0x170/0x950 [ 39.194912] split_vma+0xc6/0x110 [ 39.195356] mprotect_fixup+0x8d2/0xb30 [ 39.195858] do_mprotect_pkey+0x87e/0xd40 [ 39.196388] __x64_sys_mprotect+0x78/0xc0 [ 39.196908] do_syscall_64+0x3f/0x90 [ 39.197418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.198062] [ 39.198280] Freed by task 19: [ 39.198672] kasan_save_stack+0x22/0x50 [ 39.199187] kasan_set_track+0x25/0x30 [ 39.199680] kasan_save_free_info+0x2b/0x50 [ 39.200209] __kasan_slab_free+0x10a/0x190 [ 39.200746] kmem_cache_free+0x10d/0x4d0 [ 39.201261] rcu_core+0x8c8/0x2860 [ 39.201705] __do_softirq+0x1b7/0x7d4 [ 39.202185] [ 39.202404] Last potentially related work creation: [ 39.202993] kasan_save_stack+0x22/0x50 [ 39.203498] __kasan_record_aux_stack+0x8e/0xa0 [ 39.204070] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.204719] remove_vma+0x139/0x170 [ 39.205187] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.205745] do_vmi_munmap+0x1f1/0x2b0 [ 39.206233] __vm_munmap+0x138/0x3a0 [ 39.206705] __x64_sys_munmap+0x59/0x80 [ 39.207200] do_syscall_64+0x3f/0x90 [ 39.207674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.208336] [ 39.208551] Second to last potentially related work creation: [ 39.209259] kasan_save_stack+0x22/0x50 [ 39.209759] __kasan_record_aux_stack+0x8e/0xa0 [ 39.210334] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.210977] remove_vma+0x139/0x170 [ 39.211439] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.211995] do_vmi_munmap+0x1f1/0x2b0 [ 39.212478] mmap_region+0x1f9/0x2660 [ 39.212951] do_mmap+0x854/0xf00 [ 39.213397] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.213882] ksys_mmap_pgoff+0x3af/0x500 [ 39.214385] do_syscall_64+0x3f/0x90 [ 39.214859] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.215501] [ 39.215719] The buggy address belongs to the object at ffff88800d609910 [ 39.215719] which belongs to the cache vm_area_struct of size 168 [ 39.217217] The buggy address is located 88 bytes inside of [ 39.217217] freed 168-byte region [ffff88800d609910, ffff88800d6099b8) [ 39.218639] [ 39.218853] The buggy address belongs to the physical page: [ 39.219511] page:00000000ba1c47d1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd609 [ 39.220606] memcg:ffff88800e035401 [ 39.221040] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.221705] page_type: 0xffffffff() [ 39.222153] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a76c0 dead000000000006 [ 39.223101] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e035401 [ 39.224011] page dumped because: kasan: bad access detected [ 39.224679] [ 39.224896] Memory state around the buggy address: [ 39.225517] ffff88800d609800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.226391] ffff88800d609880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.227261] >ffff88800d609900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.228113] ^ [ 39.228889] ffff88800d609980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.229748] ffff88800d609a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.230601] ================================================================== [ 39.231706] Disabling lock debugging due to kernel taint [ 41.557939] BUG: Bad rss-counter state mm:00000000f57610c6 type:MM_FILEPAGES val:33 [ 41.559200] BUG: Bad rss-counter state mm:00000000f57610c6 type:MM_ANONPAGES val:22 [ 41.976879] BUG: Bad rss-counter state mm:0000000032fd616c type:MM_FILEPAGES val:33 [ 41.978203] BUG: Bad rss-counter state mm:0000000032fd616c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18461' (ECDSA) to the list of known hosts. 2023/06/21 02:09:13 fuzzer started 2023/06/21 02:09:13 dialing manager at localhost:36067 2023/06/21 02:09:13 checking machine... 2023/06/21 02:09:13 checking revisions... [ 42.682184] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:09:14 testing simple program... [ 42.733637] cgroup: Unknown subsys name 'net' [ 42.771228] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:09:13 Registers: info registers vcpu 0 RAX=ffff888008f58768 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888010330000 RSI=ffffffff818cee03 RDI=0000000000000005 RBP=ffff888019194000 RSP=ffff88801032f800 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=3830306234386136 R12=0000000000000000 R13=ffff888008f58bc0 R14=ffff888019194090 R15=ffff88801032f8a8 RIP=ffffffff818cee1b 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 00007fefe3346900 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=00007fefe2865020 CR3=000000000d662000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3b19f90b9dfb789400000000000ae988 XMM05=8db2a7cfea4d85300000000000133d30 XMM06=8738df831f68f8ca0000000000132760 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180f5d4 RBX=ffffffff85dfe5f4 RCX=ffffffff8180f5ba RDX=0000000000000000 RSI=ffffffff8613971a RDI=ffffffff85dfe5d0 RBP=ffffffff85dfe5f0 RSP=ffff88800c99f5e0 R8 =ffffffff8613971a R9 =ffff88800c99f6d8 R10=0000000000038001 R11=0000000000020f03 R12=ffffffff85dfe5f0 R13=ffffffff85dfe5d0 R14=ffffffff85dfe5ec R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000283 [--S---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 00007f77cbd35900 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=00007f77cbd14020 CR3=000000001834c000 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=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