syzkaller login: [ 31.538858] BUG: Bad rss-counter state mm:00000000bea04048 type:MM_FILEPAGES val:33 [ 31.540056] BUG: Bad rss-counter state mm:00000000bea04048 type:MM_ANONPAGES val:22 [ 31.700751] ================================================================== [ 31.701856] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.703022] Read of size 8 at addr ffff888019965310 by task sshd/220 [ 31.704039] [ 31.704251] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.705055] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.705987] Call Trace: [ 31.706288] [ 31.706560] dump_stack_lvl+0x91/0xf0 [ 31.707025] print_report+0xcc/0x620 [ 31.707511] ? __virt_addr_valid+0x102/0x340 [ 31.708036] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.708614] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.709199] kasan_report+0xbe/0xf0 [ 31.709649] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.710233] vma_interval_tree_remove+0xc75/0xec0 [ 31.710807] vma_prepare+0xc54/0x11a0 [ 31.711263] __split_vma+0x5af/0x950 [ 31.711764] ? __pfx___split_vma+0x10/0x10 [ 31.712265] ? find_held_lock+0x2c/0x110 [ 31.712769] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.713306] ? lock_is_held_type+0x9f/0x120 [ 31.713823] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.714395] ? mtree_range_walk+0x632/0x900 [ 31.714939] ? mas_walk+0x5c7/0x7c0 [ 31.715389] do_vmi_munmap+0x1f1/0x2b0 [ 31.715884] mmap_region+0x1f9/0x2660 [ 31.716345] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.716843] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.717521] ? __pfx_lock_acquire+0x10/0x10 [ 31.718025] ? __pfx_mmap_region+0x10/0x10 [ 31.718546] ? security_mmap_addr+0x7d/0xa0 [ 31.719058] ? get_unmapped_area+0x1f5/0x3f0 [ 31.719616] do_mmap+0x854/0xf00 [ 31.720032] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.720504] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.721050] ksys_mmap_pgoff+0x3af/0x500 [ 31.721538] do_syscall_64+0x3f/0x90 [ 31.721995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.722627] RIP: 0033:0x7fd07719fd82 [ 31.723061] 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 [ 31.725085] RSP: 002b:00007ffd174fa2b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.725949] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd07719fd82 [ 31.726769] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd0765d9000 [ 31.727592] RBP: 00007fd0765d9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.728386] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557b95217ec0 [ 31.729203] R13: 00007ffd174fa2d0 R14: 00007ffd174fa300 R15: 00007ffd174fa660 [ 31.730037] [ 31.730312] [ 31.730534] Allocated by task 213: [ 31.730952] kasan_save_stack+0x22/0x50 [ 31.731433] kasan_set_track+0x25/0x30 [ 31.731921] __kasan_slab_alloc+0x59/0x70 [ 31.732419] kmem_cache_alloc+0x16b/0x370 [ 31.732922] vm_area_dup+0x20/0x160 [ 31.733354] __split_vma+0x170/0x950 [ 31.733804] split_vma+0xc6/0x110 [ 31.734219] mprotect_fixup+0x8d2/0xb30 [ 31.734715] do_mprotect_pkey+0x87e/0xd40 [ 31.735213] __x64_sys_mprotect+0x78/0xc0 [ 31.735778] do_syscall_64+0x3f/0x90 [ 31.736229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.736935] [ 31.737147] Freed by task 213: [ 31.737567] kasan_save_stack+0x22/0x50 [ 31.738104] kasan_set_track+0x25/0x30 [ 31.738659] kasan_save_free_info+0x2b/0x50 [ 31.739188] __kasan_slab_free+0x10a/0x190 [ 31.739778] kmem_cache_free+0x10d/0x4d0 [ 31.740275] rcu_core+0x8c8/0x2860 [ 31.740793] __do_softirq+0x1b7/0x7d4 [ 31.741261] [ 31.741478] Last potentially related work creation: [ 31.742106] kasan_save_stack+0x22/0x50 [ 31.742670] __kasan_record_aux_stack+0x8e/0xa0 [ 31.743231] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.743945] remove_vma+0x139/0x170 [ 31.744394] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.745014] do_vmi_munmap+0x1f1/0x2b0 [ 31.745508] __vm_munmap+0x138/0x3a0 [ 31.746017] __x64_sys_munmap+0x59/0x80 [ 31.746517] do_syscall_64+0x3f/0x90 [ 31.747016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.747716] [ 31.747926] The buggy address belongs to the object at ffff8880199652b8 [ 31.747926] which belongs to the cache vm_area_struct of size 168 [ 31.749441] The buggy address is located 88 bytes inside of [ 31.749441] freed 168-byte region [ffff8880199652b8, ffff888019965360) [ 31.750946] [ 31.751163] The buggy address belongs to the physical page: [ 31.751909] page:000000000e505f83 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19965 [ 31.753065] memcg:ffff888016b91c01 [ 31.753496] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.754187] page_type: 0xffffffff() [ 31.754676] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.755618] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b91c01 [ 31.756500] page dumped because: kasan: bad access detected [ 31.757145] [ 31.757356] Memory state around the buggy address: [ 31.757924] ffff888019965200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.758789] ffff888019965280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.759640] >ffff888019965300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.760472] ^ [ 31.760937] ffff888019965380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.761780] ffff888019965400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.762638] ================================================================== [ 31.763636] Disabling lock debugging due to kernel taint [ 33.744219] BUG: Bad rss-counter state mm:00000000c50b967a type:MM_FILEPAGES val:33 [ 33.745031] BUG: Bad rss-counter state mm:00000000c50b967a type:MM_ANONPAGES val:22 [ 34.162121] BUG: Bad rss-counter state mm:00000000679073ce type:MM_FILEPAGES val:33 [ 34.162897] BUG: Bad rss-counter state mm:00000000679073ce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61274' (ECDSA) to the list of known hosts. 2023/06/19 14:56:29 fuzzer started 2023/06/19 14:56:29 dialing manager at localhost:44161 2023/06/19 14:56:29 checking machine... 2023/06/19 14:56:29 checking revisions... [ 34.815642] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:56:29 testing simple program... [ 34.886683] cgroup: Unknown subsys name 'net' [ 34.972794] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:56:28 Registers: info registers vcpu 0 RAX=1ffff1100288dc39 RBX=ffff88801446e198 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801446e1c8 RBP=ffff888016bf7000 RSP=ffff88800da8f8e8 R8 =0000000000000001 R9 =ffffed1001b51f11 R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff888016c13c80 R14=ffffffff8366dfdf R15=ffff888015f8c300 RIP=ffffffff81846362 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 00007f9894a48900 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=00007f9893f68000 CR3=000000000f2c6000 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=7a1f4f18986bd99fdf44492241f52880 XMM02=ec2efd57dc4c00df000000000011c720 XMM03=9b85ec4829e81250000000000011c7f0 XMM04=b0399579310c643f00000000000ae988 XMM05=1f827e33595f4f0b0000000000134cf8 XMM06=4fda316b135da52b0000000000133ae8 XMM07=fb795ef6d65770560000000000124110 XMM08=2c67c8bc2e329bc3000000000011c790 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff81710fc3 RDX=fffff940000d56d1 RSI=0000000000000008 RDI=ffffea00006ab680 RBP=ffff888016897d90 RSP=ffff888016897c00 R8 =0000000000000001 R9 =fffff940000d56d0 R10=ffffea00006ab687 R11=0000000000000000 R12=ffffea00006ab680 R13=ffff88800f21e1d0 R14=ffff888016897db8 R15=ffffea00006ab6b4 RIP=ffffffff81710fca 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f461f43e900 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=00007f461f9f2ae8 CR3=0000000016f14000 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