syzkaller login: [ 31.071004] BUG: Bad rss-counter state mm:000000009f5ff9c8 type:MM_FILEPAGES val:33 [ 31.071552] BUG: Bad rss-counter state mm:000000009f5ff9c8 type:MM_ANONPAGES val:22 [ 31.213169] ================================================================== [ 31.214179] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.215159] Read of size 8 at addr ffff88800ec9db38 by task sshd/220 [ 31.216063] [ 31.216327] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.217213] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.218253] Call Trace: [ 31.218609] [ 31.218896] dump_stack_lvl+0x91/0xf0 [ 31.219401] print_report+0xcc/0x620 [ 31.219900] ? __virt_addr_valid+0x102/0x340 [ 31.220475] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.221104] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.221768] kasan_report+0xbe/0xf0 [ 31.222252] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.222922] vma_interval_tree_remove+0xc75/0xec0 [ 31.223564] vma_prepare+0xc54/0x11a0 [ 31.224066] __split_vma+0x5af/0x950 [ 31.224569] ? __pfx___split_vma+0x10/0x10 [ 31.225115] ? find_held_lock+0x2c/0x110 [ 31.225678] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.226281] ? lock_is_held_type+0x9f/0x120 [ 31.226857] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.227514] ? mtree_range_walk+0x632/0x900 [ 31.228096] ? mas_walk+0x5c7/0x7c0 [ 31.228598] do_vmi_munmap+0x1f1/0x2b0 [ 31.229101] mmap_region+0x1f9/0x2660 [ 31.229612] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.230170] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.230925] ? __pfx_lock_acquire+0x10/0x10 [ 31.231507] ? __pfx_mmap_region+0x10/0x10 [ 31.232062] ? security_mmap_addr+0x7d/0xa0 [ 31.232624] ? get_unmapped_area+0x1f5/0x3f0 [ 31.233194] do_mmap+0x854/0xf00 [ 31.233655] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.234174] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.234772] ksys_mmap_pgoff+0x3af/0x500 [ 31.235297] do_syscall_64+0x3f/0x90 [ 31.235817] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.236517] RIP: 0033:0x7fb211440d82 [ 31.236990] 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 [ 31.239220] RSP: 002b:00007ffe4c02de68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.240183] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb211440d82 [ 31.241062] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb21087a000 [ 31.241993] RBP: 00007fb21087a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.242887] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555ff5b03b20 [ 31.243789] R13: 00007ffe4c02de80 R14: 00007ffe4c02deb0 R15: 00007ffe4c02e210 [ 31.244701] [ 31.245009] [ 31.245230] Allocated by task 213: [ 31.245693] kasan_save_stack+0x22/0x50 [ 31.246230] kasan_set_track+0x25/0x30 [ 31.246782] __kasan_slab_alloc+0x59/0x70 [ 31.247325] kmem_cache_alloc+0x16b/0x370 [ 31.247866] vm_area_dup+0x20/0x160 [ 31.248333] __split_vma+0x170/0x950 [ 31.248826] split_vma+0xc6/0x110 [ 31.249277] mprotect_fixup+0x8d2/0xb30 [ 31.249824] do_mprotect_pkey+0x87e/0xd40 [ 31.250361] __x64_sys_mprotect+0x78/0xc0 [ 31.250915] do_syscall_64+0x3f/0x90 [ 31.251409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.252109] [ 31.252337] Freed by task 213: [ 31.252765] kasan_save_stack+0x22/0x50 [ 31.253285] kasan_set_track+0x25/0x30 [ 31.253841] kasan_save_free_info+0x2b/0x50 [ 31.254399] __kasan_slab_free+0x10a/0x190 [ 31.254963] kmem_cache_free+0x10d/0x4d0 [ 31.255505] rcu_core+0x8c8/0x2860 [ 31.255972] __do_softirq+0x1b7/0x7d4 [ 31.256493] [ 31.256774] Last potentially related work creation: [ 31.257395] kasan_save_stack+0x22/0x50 [ 31.257961] __kasan_record_aux_stack+0x8e/0xa0 [ 31.258598] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.259445] remove_vma+0x139/0x170 [ 31.260024] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.260736] do_vmi_munmap+0x1f1/0x2b0 [ 31.261365] __vm_munmap+0x138/0x3a0 [ 31.261988] __x64_sys_munmap+0x59/0x80 [ 31.262639] do_syscall_64+0x3f/0x90 [ 31.263252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.264100] [ 31.264373] Second to last potentially related work creation: [ 31.265267] kasan_save_stack+0x22/0x50 [ 31.265932] __kasan_record_aux_stack+0x8e/0xa0 [ 31.266673] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.267496] remove_vma+0x139/0x170 [ 31.268086] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.268800] do_vmi_munmap+0x1f1/0x2b0 [ 31.269426] mmap_region+0x1f9/0x2660 [ 31.269992] do_mmap+0x854/0xf00 [ 31.270453] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.270964] ksys_mmap_pgoff+0x7d/0x500 [ 31.271495] do_syscall_64+0x3f/0x90 [ 31.271993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.272685] [ 31.272912] The buggy address belongs to the object at ffff88800ec9dae0 [ 31.272912] which belongs to the cache vm_area_struct of size 168 [ 31.274479] The buggy address is located 88 bytes inside of [ 31.274479] freed 168-byte region [ffff88800ec9dae0, ffff88800ec9db88) [ 31.275950] [ 31.276170] The buggy address belongs to the physical page: [ 31.276859] page:00000000479519df refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec9d [ 31.278008] memcg:ffff88800dfab901 [ 31.278481] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.279210] page_type: 0xffffffff() [ 31.279690] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.280650] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfab901 [ 31.281590] page dumped because: kasan: bad access detected [ 31.282289] [ 31.282537] Memory state around the buggy address: [ 31.283136] ffff88800ec9da00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.284035] ffff88800ec9da80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.284936] >ffff88800ec9db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.285849] ^ [ 31.286515] ffff88800ec9db80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 31.287410] ffff88800ec9dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.288320] ================================================================== [ 31.289361] Disabling lock debugging due to kernel taint [ 33.559139] BUG: Bad rss-counter state mm:00000000c89139b1 type:MM_FILEPAGES val:33 [ 33.560122] BUG: Bad rss-counter state mm:00000000c89139b1 type:MM_ANONPAGES val:22 [ 34.037931] BUG: Bad rss-counter state mm:0000000008227a6e type:MM_FILEPAGES val:33 [ 34.038933] BUG: Bad rss-counter state mm:0000000008227a6e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41149' (ECDSA) to the list of known hosts. 2023/06/20 10:55:24 fuzzer started 2023/06/20 10:55:24 dialing manager at localhost:36067 2023/06/20 10:55:24 checking machine... 2023/06/20 10:55:24 checking revisions... [ 34.768855] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:55:24 testing simple program... [ 34.813255] cgroup: Unknown subsys name 'net' [ 34.863896] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:55:24 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff88806ce09d18 RSP=ffff88806ce09c50 R8 =0000000000000001 R9 =ffffed100d9c1396 R10=ffff88806ce09cb7 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000002 [-------] 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 00007f8ae8531900 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=00007f8ae7952510 CR3=0000000009d68000 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=7ee8f1b51e05d7cf00000000000ae988 XMM05=ad0b04cdfff92b790000000000134580 XMM06=e4cb8bb95a7664b60000000000133358 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110013fffe1 RBX=0000000000000002 RCX=dffffc0000000000 RDX=ffff88800fc3d1c0 RSI=ffffffff83723d07 RDI=ffff888009ffff08 RBP=0000000000000003 RSP=ffff888018327640 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000001 R13=ffffffff87f99af0 R14=ffffffff83ab1580 R15=0000000000000006 RIP=ffffffff83723d2a 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 00007f9adf1ec900 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=00007f9adf7a3618 CR3=0000000019f2c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000