syzkaller login: [ 31.065888] BUG: Bad rss-counter state mm:0000000058a961af type:MM_FILEPAGES val:33 [ 31.067417] BUG: Bad rss-counter state mm:0000000058a961af type:MM_ANONPAGES val:22 [ 31.232685] ================================================================== [ 31.233601] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.234565] Read of size 8 at addr ffff8880094dd6b0 by task sshd/219 [ 31.235362] [ 31.235580] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.236584] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.237597] Call Trace: [ 31.237941] [ 31.238234] dump_stack_lvl+0x91/0xf0 [ 31.238744] print_report+0xcc/0x620 [ 31.239258] ? __virt_addr_valid+0x102/0x340 [ 31.239803] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.240438] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.241073] kasan_report+0xbe/0xf0 [ 31.241562] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.242215] vma_interval_tree_remove+0xc75/0xec0 [ 31.242846] vma_prepare+0xc54/0x11a0 [ 31.243350] __split_vma+0x5af/0x950 [ 31.243842] ? __pfx___split_vma+0x10/0x10 [ 31.244406] ? find_held_lock+0x2c/0x110 [ 31.244931] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.245524] ? lock_is_held_type+0x9f/0x120 [ 31.246092] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.246729] ? mtree_range_walk+0x632/0x900 [ 31.247310] ? mas_walk+0x5c7/0x7c0 [ 31.247799] do_vmi_munmap+0x1f1/0x2b0 [ 31.248310] mmap_region+0x1f9/0x2660 [ 31.248846] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.249401] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.250200] ? __pfx_lock_acquire+0x10/0x10 [ 31.250755] ? __pfx_mmap_region+0x10/0x10 [ 31.251303] ? security_mmap_addr+0x7d/0xa0 [ 31.251857] ? get_unmapped_area+0x1f5/0x3f0 [ 31.252438] do_mmap+0x854/0xf00 [ 31.252889] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.253399] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.253986] ksys_mmap_pgoff+0x3af/0x500 [ 31.254510] do_syscall_64+0x3f/0x90 [ 31.255011] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.255675] RIP: 0033:0x7fa385900d82 [ 31.256151] 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 [ 31.258395] RSP: 002b:00007ffcf9932228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.259412] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa385900d82 [ 31.260442] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa384d3a000 [ 31.261425] RBP: 00007fa384d3a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.262413] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ecf108eec0 [ 31.263524] R13: 00007ffcf9932240 R14: 00007ffcf9932270 R15: 00007ffcf99325d0 [ 31.264617] [ 31.265013] [ 31.265289] Allocated by task 212: [ 31.265786] kasan_save_stack+0x22/0x50 [ 31.266356] kasan_set_track+0x25/0x30 [ 31.266995] __kasan_slab_alloc+0x59/0x70 [ 31.267684] kmem_cache_alloc+0x16b/0x370 [ 31.268385] vm_area_dup+0x20/0x160 [ 31.268982] __split_vma+0x170/0x950 [ 31.269570] split_vma+0xc6/0x110 [ 31.270026] mprotect_fixup+0x8d2/0xb30 [ 31.270542] do_mprotect_pkey+0x87e/0xd40 [ 31.271083] __x64_sys_mprotect+0x78/0xc0 [ 31.271623] do_syscall_64+0x3f/0x90 [ 31.272114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.272806] [ 31.273031] Freed by task 212: [ 31.273441] kasan_save_stack+0x22/0x50 [ 31.273958] kasan_set_track+0x25/0x30 [ 31.274477] kasan_save_free_info+0x2b/0x50 [ 31.275026] __kasan_slab_free+0x10a/0x190 [ 31.275577] kmem_cache_free+0x10d/0x4d0 [ 31.276101] rcu_core+0x8c8/0x2860 [ 31.276582] __do_softirq+0x1b7/0x7d4 [ 31.277073] [ 31.277298] Last potentially related work creation: [ 31.277928] kasan_save_stack+0x22/0x50 [ 31.278452] __kasan_record_aux_stack+0x8e/0xa0 [ 31.279033] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.279679] remove_vma+0x139/0x170 [ 31.280209] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.280813] do_vmi_munmap+0x1f1/0x2b0 [ 31.281299] __vm_munmap+0x138/0x3a0 [ 31.281766] __x64_sys_munmap+0x59/0x80 [ 31.282255] do_syscall_64+0x3f/0x90 [ 31.282730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.283372] [ 31.283591] The buggy address belongs to the object at ffff8880094dd658 [ 31.283591] which belongs to the cache vm_area_struct of size 168 [ 31.285054] The buggy address is located 88 bytes inside of [ 31.285054] freed 168-byte region [ffff8880094dd658, ffff8880094dd700) [ 31.286452] [ 31.286671] The buggy address belongs to the physical page: [ 31.287320] page:00000000f795d478 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94dd [ 31.288448] memcg:ffff88801454b301 [ 31.288876] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.289537] page_type: 0xffffffff() [ 31.289986] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.290914] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801454b301 [ 31.291834] page dumped because: kasan: bad access detected [ 31.292516] [ 31.292733] Memory state around the buggy address: [ 31.293314] ffff8880094dd580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.294168] ffff8880094dd600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.295022] >ffff8880094dd680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.295874] ^ [ 31.296482] ffff8880094dd700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.297354] ffff8880094dd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.298193] ================================================================== [ 31.299264] Disabling lock debugging due to kernel taint [ 33.596579] BUG: Bad rss-counter state mm:00000000335e07b6 type:MM_FILEPAGES val:33 [ 33.597750] BUG: Bad rss-counter state mm:00000000335e07b6 type:MM_ANONPAGES val:22 [ 33.955762] BUG: Bad rss-counter state mm:00000000e16d0730 type:MM_FILEPAGES val:33 [ 33.956795] BUG: Bad rss-counter state mm:00000000e16d0730 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59806' (ECDSA) to the list of known hosts. 2023/06/20 20:51:12 fuzzer started 2023/06/20 20:51:13 dialing manager at localhost:36067 2023/06/20 20:51:13 checking machine... 2023/06/20 20:51:13 checking revisions... [ 34.653295] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:51:13 testing simple program... [ 34.696338] cgroup: Unknown subsys name 'net' [ 34.757730] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:51:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888015c81b40 RCX=0000000000000000 RDX=1ffff11002b905b1 RSI=0000000000000008 RDI=ffff888015c82d88 RBP=ffff88800ffc7000 RSP=ffff88801967fa48 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000000 R13=ffff88800f270c00 R14=0000000000000000 R15=ffffffff8186c9a6 RIP=ffffffff84511dd4 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 00007fa5b3e60900 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=00007fff6e411000 CR3=0000000009a3a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=ffff888008c04400 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=00007f3bb7a4d3d0 CR3=0000000008cc8000 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=46db0babbda5cfa07549ccbddbddf5f3 XMM02=000000000011a5a0ec2efd57dc4c00df XMM03=0000000000121a086bdec740aca6d060 XMM04=b86b21085a971a8700000000000ae988 XMM05=dfcdbad4f1609c370000000000131870 XMM06=d78f9b83aa946f0600000000001306d8 XMM07=e042d86d42eb936e0000000000121c88 XMM08=6bdec740aca6d060000000000011a600 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000