syzkaller login: [ 35.142324] BUG: Bad rss-counter state mm:000000003e51d537 type:MM_FILEPAGES val:33 [ 35.143377] BUG: Bad rss-counter state mm:000000003e51d537 type:MM_ANONPAGES val:22 [ 35.259373] ================================================================== [ 35.260022] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.260690] Read of size 8 at addr ffff88800ef396b0 by task sshd/220 [ 35.261227] [ 35.261383] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.261992] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.262677] Call Trace: [ 35.262906] [ 35.263112] dump_stack_lvl+0x91/0xf0 [ 35.263464] print_report+0xcc/0x620 [ 35.263811] ? __virt_addr_valid+0x102/0x340 [ 35.264288] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.264748] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.265181] kasan_report+0xbe/0xf0 [ 35.265477] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.265810] vma_interval_tree_remove+0xc75/0xec0 [ 35.266147] vma_prepare+0xc54/0x11a0 [ 35.266405] __split_vma+0x5af/0x950 [ 35.266660] ? __pfx___split_vma+0x10/0x10 [ 35.266944] ? find_held_lock+0x2c/0x110 [ 35.267223] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.267524] ? lock_is_held_type+0x9f/0x120 [ 35.267813] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.268137] ? mtree_range_walk+0x632/0x900 [ 35.268432] ? mas_walk+0x5c7/0x7c0 [ 35.268694] do_vmi_munmap+0x1f1/0x2b0 [ 35.268959] mmap_region+0x1f9/0x2660 [ 35.269219] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.269497] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.269880] ? __pfx_lock_acquire+0x10/0x10 [ 35.270169] ? __pfx_mmap_region+0x10/0x10 [ 35.270455] ? security_mmap_addr+0x7d/0xa0 [ 35.270744] ? get_unmapped_area+0x1f5/0x3f0 [ 35.271042] do_mmap+0x854/0xf00 [ 35.271278] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.271546] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.271848] ksys_mmap_pgoff+0x3af/0x500 [ 35.272124] do_syscall_64+0x3f/0x90 [ 35.272386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.272743] RIP: 0033:0x7fd508b28d82 [ 35.272991] 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 [ 35.274127] RSP: 002b:00007ffc4949a648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.274610] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd508b28d82 [ 35.275068] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd507f62000 [ 35.275528] RBP: 00007fd507f62000 R08: 0000000000000009 R09: 0000000000001000 [ 35.275980] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c9757dd90 [ 35.276431] R13: 00007ffc4949a660 R14: 00007ffc4949a690 R15: 00007ffc4949a9f0 [ 35.276905] [ 35.277065] [ 35.277181] Allocated by task 213: [ 35.277416] kasan_save_stack+0x22/0x50 [ 35.277691] kasan_set_track+0x25/0x30 [ 35.277956] __kasan_slab_alloc+0x59/0x70 [ 35.278240] kmem_cache_alloc+0x16b/0x370 [ 35.278516] vm_area_dup+0x20/0x160 [ 35.278760] __split_vma+0x170/0x950 [ 35.279011] split_vma+0xc6/0x110 [ 35.279248] mprotect_fixup+0x8d2/0xb30 [ 35.279522] do_mprotect_pkey+0x87e/0xd40 [ 35.279802] __x64_sys_mprotect+0x78/0xc0 [ 35.280082] do_syscall_64+0x3f/0x90 [ 35.280338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.280689] [ 35.280806] Freed by task 13: [ 35.281011] kasan_save_stack+0x22/0x50 [ 35.281283] kasan_set_track+0x25/0x30 [ 35.281549] kasan_save_free_info+0x2b/0x50 [ 35.281838] __kasan_slab_free+0x10a/0x190 [ 35.282126] kmem_cache_free+0x10d/0x4d0 [ 35.282396] rcu_core+0x8c8/0x2860 [ 35.282636] __do_softirq+0x1b7/0x7d4 [ 35.282895] [ 35.283013] Last potentially related work creation: [ 35.283328] kasan_save_stack+0x22/0x50 [ 35.283600] __kasan_record_aux_stack+0x8e/0xa0 [ 35.283907] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.284248] remove_vma+0x139/0x170 [ 35.284491] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.284797] do_vmi_munmap+0x1f1/0x2b0 [ 35.285059] __vm_munmap+0x138/0x3a0 [ 35.285312] __x64_sys_munmap+0x59/0x80 [ 35.285579] do_syscall_64+0x3f/0x90 [ 35.285836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.286182] [ 35.286298] Second to last potentially related work creation: [ 35.286663] kasan_save_stack+0x22/0x50 [ 35.286934] __kasan_record_aux_stack+0x8e/0xa0 [ 35.287239] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.287583] remove_vma+0x139/0x170 [ 35.287831] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.288133] do_vmi_munmap+0x1f1/0x2b0 [ 35.288392] mmap_region+0x1f9/0x2660 [ 35.288651] do_mmap+0x854/0xf00 [ 35.288898] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.289162] ksys_mmap_pgoff+0x3af/0x500 [ 35.289431] do_syscall_64+0x3f/0x90 [ 35.289688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.290034] [ 35.290152] The buggy address belongs to the object at ffff88800ef39658 [ 35.290152] which belongs to the cache vm_area_struct of size 168 [ 35.290936] The buggy address is located 88 bytes inside of [ 35.290936] freed 168-byte region [ffff88800ef39658, ffff88800ef39700) [ 35.291690] [ 35.291807] The buggy address belongs to the physical page: [ 35.292155] page:00000000536b1286 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef39 [ 35.292740] memcg:ffff88800ec6a001 [ 35.292968] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.293338] page_type: 0xffffffff() [ 35.293581] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b36c0 dead000000000007 [ 35.294068] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec6a001 [ 35.294556] page dumped because: kasan: bad access detected [ 35.294912] [ 35.295028] Memory state around the buggy address: [ 35.295336] ffff88800ef39580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.295795] ffff88800ef39600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 35.296250] >ffff88800ef39680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.296708] ^ [ 35.297022] ffff88800ef39700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.297470] ffff88800ef39780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.297920] ================================================================== [ 35.298524] Disabling lock debugging due to kernel taint [ 36.570549] BUG: Bad rss-counter state mm:000000006a6b74cc type:MM_FILEPAGES val:33 [ 36.571717] BUG: Bad rss-counter state mm:000000006a6b74cc type:MM_ANONPAGES val:22 [ 36.935557] BUG: Bad rss-counter state mm:000000009c8359eb type:MM_FILEPAGES val:33 [ 36.936783] BUG: Bad rss-counter state mm:000000009c8359eb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41015' (ECDSA) to the list of known hosts. 2023/06/21 05:11:03 fuzzer started 2023/06/21 05:11:03 dialing manager at localhost:36067 2023/06/21 05:11:03 checking machine... 2023/06/21 05:11:03 checking revisions... [ 37.545720] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:11:03 testing simple program... [ 37.588775] cgroup: Unknown subsys name 'net' [ 37.620441] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:11:03 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ff31fe86030 CR3=0000000019d4a000 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=2032303a31313a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a31313a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba7a6b RBX=fffffbfff0ba7a6b RCX=ffffffff815342db RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff8880164dfa88 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff8880164dfb38 R14=0000000000000000 R15=00000000000000e5 RIP=ffffffff8180f184 RFL=00000046 [---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 00007f6b8535b900 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=00007ffe723fa000 CR3=000000000eb6c000 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=6720646572637465733a4d41503d706f 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