syzkaller login: [ 31.076317] BUG: Bad rss-counter state mm:00000000c7872b8f type:MM_FILEPAGES val:33 [ 31.077355] BUG: Bad rss-counter state mm:00000000c7872b8f type:MM_ANONPAGES val:22 [ 31.243431] ================================================================== [ 31.244325] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.245273] Read of size 8 at addr ffff88800f16b6b0 by task sshd/219 [ 31.246056] [ 31.246373] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.247252] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.248228] Call Trace: [ 31.248547] [ 31.248835] dump_stack_lvl+0x91/0xf0 [ 31.249362] print_report+0xcc/0x620 [ 31.249843] ? __virt_addr_valid+0x102/0x340 [ 31.250393] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.251019] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.251638] kasan_report+0xbe/0xf0 [ 31.252123] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.252751] vma_interval_tree_remove+0xc75/0xec0 [ 31.253370] vma_prepare+0xc54/0x11a0 [ 31.253849] __split_vma+0x5af/0x950 [ 31.254333] ? __pfx___split_vma+0x10/0x10 [ 31.254869] ? find_held_lock+0x2c/0x110 [ 31.255394] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.255963] ? lock_is_held_type+0x9f/0x120 [ 31.256501] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.257122] ? mtree_range_walk+0x632/0x900 [ 31.257679] ? mas_walk+0x5c7/0x7c0 [ 31.258159] do_vmi_munmap+0x1f1/0x2b0 [ 31.258652] mmap_region+0x1f9/0x2660 [ 31.259139] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.259653] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.260370] ? __pfx_lock_acquire+0x10/0x10 [ 31.260913] ? __pfx_mmap_region+0x10/0x10 [ 31.261473] ? security_mmap_addr+0x7d/0xa0 [ 31.262007] ? get_unmapped_area+0x1f5/0x3f0 [ 31.262568] do_mmap+0x854/0xf00 [ 31.263011] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.263514] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.264087] ksys_mmap_pgoff+0x3af/0x500 [ 31.264597] do_syscall_64+0x3f/0x90 [ 31.265094] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.265753] RIP: 0033:0x7f27ad7a4d82 [ 31.266214] 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 [ 31.268349] RSP: 002b:00007ffd5b117908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.269269] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f27ad7a4d82 [ 31.270129] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f27acbde000 [ 31.270993] RBP: 00007f27acbde000 R08: 0000000000000009 R09: 0000000000001000 [ 31.271852] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c6473c5b20 [ 31.272716] R13: 00007ffd5b117920 R14: 00007ffd5b117950 R15: 00007ffd5b117cb0 [ 31.273604] [ 31.273903] [ 31.274121] Allocated by task 212: [ 31.274554] kasan_save_stack+0x22/0x50 [ 31.275063] kasan_set_track+0x25/0x30 [ 31.275562] __kasan_slab_alloc+0x59/0x70 [ 31.276085] kmem_cache_alloc+0x16b/0x370 [ 31.276603] vm_area_dup+0x20/0x160 [ 31.277064] __split_vma+0x170/0x950 [ 31.277536] split_vma+0xc6/0x110 [ 31.277978] mprotect_fixup+0x8d2/0xb30 [ 31.278475] do_mprotect_pkey+0x87e/0xd40 [ 31.278997] __x64_sys_mprotect+0x78/0xc0 [ 31.279519] do_syscall_64+0x3f/0x90 [ 31.279990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.280635] [ 31.280851] Freed by task 212: [ 31.281266] kasan_save_stack+0x22/0x50 [ 31.281769] kasan_set_track+0x25/0x30 [ 31.282260] kasan_save_free_info+0x2b/0x50 [ 31.282801] __kasan_slab_free+0x10a/0x190 [ 31.283334] kmem_cache_free+0x10d/0x4d0 [ 31.283845] rcu_core+0x8c8/0x2860 [ 31.284293] __do_softirq+0x1b7/0x7d4 [ 31.284775] [ 31.284997] Last potentially related work creation: [ 31.285591] kasan_save_stack+0x22/0x50 [ 31.286095] __kasan_record_aux_stack+0x8e/0xa0 [ 31.286667] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.287322] remove_vma+0x139/0x170 [ 31.287772] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.288338] do_vmi_munmap+0x1f1/0x2b0 [ 31.288832] __vm_munmap+0x138/0x3a0 [ 31.289312] __x64_sys_munmap+0x59/0x80 [ 31.289809] do_syscall_64+0x3f/0x90 [ 31.290282] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.290931] [ 31.291146] The buggy address belongs to the object at ffff88800f16b658 [ 31.291146] which belongs to the cache vm_area_struct of size 168 [ 31.292620] The buggy address is located 88 bytes inside of [ 31.292620] freed 168-byte region [ffff88800f16b658, ffff88800f16b700) [ 31.294054] [ 31.294270] The buggy address belongs to the physical page: [ 31.294925] page:00000000baf98c74 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf16b [ 31.296015] memcg:ffff88800eb9b501 [ 31.296443] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.297160] page_type: 0xffffffff() [ 31.297605] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.298528] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb9b501 [ 31.299440] page dumped because: kasan: bad access detected [ 31.300136] [ 31.300355] Memory state around the buggy address: [ 31.300941] ffff88800f16b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.301819] ffff88800f16b600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.302676] >ffff88800f16b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.303521] ^ [ 31.304107] ffff88800f16b700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.304986] ffff88800f16b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.305842] ================================================================== [ 31.306823] Disabling lock debugging due to kernel taint [ 33.228867] BUG: Bad rss-counter state mm:000000008c9fa613 type:MM_FILEPAGES val:33 [ 33.229908] BUG: Bad rss-counter state mm:000000008c9fa613 type:MM_ANONPAGES val:22 [ 33.767551] BUG: Bad rss-counter state mm:00000000b518c9e9 type:MM_FILEPAGES val:33 [ 33.768722] BUG: Bad rss-counter state mm:00000000b518c9e9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21193' (ECDSA) to the list of known hosts. 2023/06/21 04:38:10 fuzzer started 2023/06/21 04:38:10 dialing manager at localhost:36067 2023/06/21 04:38:10 checking machine... 2023/06/21 04:38:10 checking revisions... [ 34.441094] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:38:10 testing simple program... [ 34.481169] cgroup: Unknown subsys name 'net' [ 34.524568] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:38:10 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880183d3130 RCX=ffff88800844f780 RDX=ffffea000060f4c0 RSI=0000000000000008 RDI=ffffffff84535ffc RBP=0000000000000000 RSP=ffff88800cb07a38 R8 =ffff8880183d3260 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000d000c R12=dffffc0000000000 R13=ffff88800cb07a78 R14=ffff88800844f780 R15=ffff8880183d3390 RIP=ffffffff81810316 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 00007f78b0ef1900 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=00007ffcf624a000 CR3=000000001cdec000 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=ffffc90000660000 RBX=ffff88800f3f0b80 RCX=1ffff11001e7e22e RDX=1ffff11001e7e1b6 RSI=0000000000000004 RDI=ffff88800f3f1170 RBP=1ffff110011e6f76 RSP=ffff888008f37b38 R8 =0000000000000001 R9 =ffffed10011e6f55 R10=0000000000000003 R11=0000000000000128 R12=ffff88800f3f0d98 R13=0000000000000000 R14=ffff88800f3f0000 R15=ffff88800f3f0b80 RIP=ffffffff8302b78d 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 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=00007fe84727db00 CR3=000000000c542000 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=34785042ef5f33844d47f42f170606d1 XMM02=000000000011a840ec2efd57dc4c00df XMM03=0000000000121d803faac38330c48607 XMM04=9a783f146deb651300000000000ae988 XMM05=d2557906007041220000000000132618 XMM06=806171799158d9670000000000131a40 XMM07=e042d86d42eb936e0000000000122000 XMM08=3faac38330c48607000000000011a8a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000