syzkaller login: [ 31.329488] BUG: Bad rss-counter state mm:0000000010f7eecf type:MM_FILEPAGES val:33 [ 31.330915] BUG: Bad rss-counter state mm:0000000010f7eecf type:MM_ANONPAGES val:22 [ 31.371055] ================================================================== [ 31.372101] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.373039] Read of size 8 at addr ffff88800fcbddf0 by task sshd/220 [ 31.373816] [ 31.374035] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.374896] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.375865] Call Trace: [ 31.376183] <TASK> [ 31.376466] dump_stack_lvl+0x91/0xf0 [ 31.376968] print_report+0xcc/0x620 [ 31.377459] ? __virt_addr_valid+0x102/0x340 [ 31.378022] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.378645] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.379266] kasan_report+0xbe/0xf0 [ 31.379745] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.380368] vma_interval_tree_remove+0xc75/0xec0 [ 31.380984] vma_prepare+0xc54/0x11a0 [ 31.381464] __split_vma+0x5af/0x950 [ 31.381942] ? __pfx___split_vma+0x10/0x10 [ 31.382477] ? find_held_lock+0x2c/0x110 [ 31.382994] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.383554] ? lock_is_held_type+0x9f/0x120 [ 31.384095] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.384728] ? mtree_range_walk+0x632/0x900 [ 31.385279] ? mas_walk+0x5c7/0x7c0 [ 31.385762] do_vmi_munmap+0x1f1/0x2b0 [ 31.386255] mmap_region+0x1f9/0x2660 [ 31.386745] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.387250] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.387963] ? __pfx_lock_acquire+0x10/0x10 [ 31.388494] ? __pfx_mmap_region+0x10/0x10 [ 31.389033] ? security_mmap_addr+0x7d/0xa0 [ 31.389563] ? get_unmapped_area+0x1f5/0x3f0 [ 31.390120] do_mmap+0x854/0xf00 [ 31.390562] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.391050] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.391619] ksys_mmap_pgoff+0x3af/0x500 [ 31.392127] do_syscall_64+0x3f/0x90 [ 31.392619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.393262] RIP: 0033:0x7fd196aa6d82 [ 31.393713] 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 [ 31.395817] RSP: 002b:00007ffc651163a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.396739] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd196aa6d82 [ 31.397586] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd195ee0000 [ 31.398428] RBP: 00007fd195ee0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.399272] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e771562f70 [ 31.400112] R13: 00007ffc651163c0 R14: 00007ffc651163f0 R15: 00007ffc65116750 [ 31.400976] </TASK> [ 31.401269] [ 31.401490] Allocated by task 213: [ 31.401912] kasan_save_stack+0x22/0x50 [ 31.402420] kasan_set_track+0x25/0x30 [ 31.402908] __kasan_slab_alloc+0x59/0x70 [ 31.403434] kmem_cache_alloc+0x16b/0x370 [ 31.403958] vm_area_dup+0x20/0x160 [ 31.404416] __split_vma+0x170/0x950 [ 31.404901] split_vma+0xc6/0x110 [ 31.405342] mprotect_fixup+0x8d2/0xb30 [ 31.405843] do_mprotect_pkey+0x87e/0xd40 [ 31.406361] __x64_sys_mprotect+0x78/0xc0 [ 31.406877] do_syscall_64+0x3f/0x90 [ 31.407361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.408004] [ 31.408220] Freed by task 213: [ 31.408631] kasan_save_stack+0x22/0x50 [ 31.409132] kasan_set_track+0x25/0x30 [ 31.409621] kasan_save_free_info+0x2b/0x50 [ 31.410149] __kasan_slab_free+0x10a/0x190 [ 31.410677] kmem_cache_free+0x10d/0x4d0 [ 31.411188] rcu_core+0x8c8/0x2860 [ 31.411634] __do_softirq+0x1b7/0x7d4 [ 31.412112] [ 31.412337] Last potentially related work creation: [ 31.412925] kasan_save_stack+0x22/0x50 [ 31.413427] __kasan_record_aux_stack+0x8e/0xa0 [ 31.413995] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.414642] remove_vma+0x139/0x170 [ 31.415094] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.415655] do_vmi_munmap+0x1f1/0x2b0 [ 31.416139] __vm_munmap+0x138/0x3a0 [ 31.416619] __x64_sys_munmap+0x59/0x80 [ 31.417115] do_syscall_64+0x3f/0x90 [ 31.417590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.418241] [ 31.418454] Second to last potentially related work creation: [ 31.419130] kasan_save_stack+0x22/0x50 [ 31.419635] __kasan_record_aux_stack+0x8e/0xa0 [ 31.420205] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.420856] remove_vma+0x139/0x170 [ 31.421308] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.421859] do_vmi_munmap+0x1f1/0x2b0 [ 31.422342] mmap_region+0x1f9/0x2660 [ 31.422813] do_mmap+0x854/0xf00 [ 31.423244] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.423736] ksys_mmap_pgoff+0x3af/0x500 [ 31.424239] do_syscall_64+0x3f/0x90 [ 31.424736] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.425383] [ 31.425603] The buggy address belongs to the object at ffff88800fcbdd98 [ 31.425603] which belongs to the cache vm_area_struct of size 168 [ 31.427064] The buggy address is located 88 bytes inside of [ 31.427064] freed 168-byte region [ffff88800fcbdd98, ffff88800fcbde40) [ 31.428458] [ 31.428687] The buggy address belongs to the physical page: [ 31.429338] page:00000000a03fdcf1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfcbd [ 31.430411] memcg:ffff88800e027c01 [ 31.430834] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.431481] page_type: 0xffffffff() [ 31.431938] raw: 0100000000000200 ffff8880087a0c80 ffffea000039ea00 dead000000000006 [ 31.432869] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e027c01 [ 31.433770] page dumped because: kasan: bad access detected [ 31.434432] [ 31.434650] Memory state around the buggy address: [ 31.435223] ffff88800fcbdc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.436084] ffff88800fcbdd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.436951] >ffff88800fcbdd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.437799] ^ [ 31.438612] ffff88800fcbde00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.439468] ffff88800fcbde80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.440311] ================================================================== [ 31.441371] Disabling lock debugging due to kernel taint [ 33.381420] BUG: Bad rss-counter state mm:000000004edf31d1 type:MM_FILEPAGES val:33 [ 33.382465] BUG: Bad rss-counter state mm:000000004edf31d1 type:MM_ANONPAGES val:22 [ 33.853454] BUG: Bad rss-counter state mm:00000000ba730b1f type:MM_FILEPAGES val:33 [ 33.855116] BUG: Bad rss-counter state mm:00000000ba730b1f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60450' (ECDSA) to the list of known hosts. 2023/06/21 04:04:32 fuzzer started 2023/06/21 04:04:32 dialing manager at localhost:36067 2023/06/21 04:04:32 checking machine... 2023/06/21 04:04:32 checking revisions... [ 34.602911] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:04:32 testing simple program... [ 34.645009] cgroup: Unknown subsys name 'net' [ 34.741799] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:04:31 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=0000000000000001 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=00007ffe341edaa8 CR3=0000000005482000 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=00007f84c12ea510000055da95718790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff83636c06 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002d37ee0 RSI=ffffffff83636c06 RDI=ffff8880169bf770 RBP=ffff8880169bf740 RSP=ffff8880169bf6a0 R8 =0000000000000001 R9 =ffff8880169bf6e8 R10=0000000000038001 R11=0000000000091bda R12=ffff8880169bf770 R13=0000000000000000 R14=ffff888016cd51c0 R15=0000000000000001 RIP=ffffffff84538440 RFL=00000286 [--S--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 00007f6b22133900 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=00007ffc5a83a000 CR3=0000000016d76000 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=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