syzkaller login: [ 32.346545] BUG: Bad rss-counter state mm:0000000010d1c274 type:MM_FILEPAGES val:33 [ 32.347789] BUG: Bad rss-counter state mm:0000000010d1c274 type:MM_ANONPAGES val:22 [ 32.389827] ================================================================== [ 32.390810] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.392007] Read of size 8 at addr ffff88800d9515c8 by task sshd/221 [ 32.392825] [ 32.393070] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.394042] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.395123] Call Trace: [ 32.395479] [ 32.395804] dump_stack_lvl+0x91/0xf0 [ 32.396360] print_report+0xcc/0x620 [ 32.396872] ? __virt_addr_valid+0x102/0x340 [ 32.397476] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.398127] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.398789] kasan_report+0xbe/0xf0 [ 32.399294] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.399978] vma_interval_tree_remove+0xc75/0xec0 [ 32.400623] vma_prepare+0xc54/0x11a0 [ 32.401133] __split_vma+0x5af/0x950 [ 32.401634] ? __pfx___split_vma+0x10/0x10 [ 32.402202] ? find_held_lock+0x2c/0x110 [ 32.402750] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.403349] ? lock_is_held_type+0x9f/0x120 [ 32.403929] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.404607] ? mtree_range_walk+0x632/0x900 [ 32.405225] ? mas_walk+0x5c7/0x7c0 [ 32.405754] do_vmi_munmap+0x1f1/0x2b0 [ 32.406314] mmap_region+0x1f9/0x2660 [ 32.406853] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.407427] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.408239] ? __pfx_lock_acquire+0x10/0x10 [ 32.408836] ? __pfx_mmap_region+0x10/0x10 [ 32.409434] ? security_mmap_addr+0x7d/0xa0 [ 32.410030] ? get_unmapped_area+0x1f5/0x3f0 [ 32.410646] do_mmap+0x854/0xf00 [ 32.411138] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.411692] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.412327] ksys_mmap_pgoff+0x3af/0x500 [ 32.412894] do_syscall_64+0x3f/0x90 [ 32.413428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.414155] RIP: 0033:0x7fc10a150d82 [ 32.414665] 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 [ 32.417075] RSP: 002b:00007ffdade12908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.418086] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc10a150d82 [ 32.419032] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc10958a000 [ 32.419983] RBP: 00007fc10958a000 R08: 0000000000000009 R09: 0000000000001000 [ 32.420924] R10: 0000000000000812 R11: 0000000000000206 R12: 000055797a6d1ec0 [ 32.421859] R13: 00007ffdade12920 R14: 00007ffdade12950 R15: 00007ffdade12cb0 [ 32.422777] [ 32.423092] [ 32.423328] Allocated by task 214: [ 32.423815] kasan_save_stack+0x22/0x50 [ 32.424377] kasan_set_track+0x25/0x30 [ 32.424911] __kasan_slab_alloc+0x59/0x70 [ 32.425474] kmem_cache_alloc+0x16b/0x370 [ 32.426031] vm_area_dup+0x20/0x160 [ 32.426519] __split_vma+0x170/0x950 [ 32.427027] split_vma+0xc6/0x110 [ 32.427504] mprotect_fixup+0x8d2/0xb30 [ 32.428056] do_mprotect_pkey+0x87e/0xd40 [ 32.428614] __x64_sys_mprotect+0x78/0xc0 [ 32.429201] do_syscall_64+0x3f/0x90 [ 32.429728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.430415] [ 32.430651] Freed by task 214: [ 32.431075] kasan_save_stack+0x22/0x50 [ 32.431617] kasan_set_track+0x25/0x30 [ 32.432192] kasan_save_free_info+0x2b/0x50 [ 32.432844] __kasan_slab_free+0x10a/0x190 [ 32.433417] kmem_cache_free+0x10d/0x4d0 [ 32.433961] rcu_core+0x8c8/0x2860 [ 32.434436] __do_softirq+0x1b7/0x7d4 [ 32.434951] [ 32.435187] Last potentially related work creation: [ 32.435824] kasan_save_stack+0x22/0x50 [ 32.436367] __kasan_record_aux_stack+0x8e/0xa0 [ 32.436978] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.437665] remove_vma+0x139/0x170 [ 32.438150] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.438742] do_vmi_munmap+0x1f1/0x2b0 [ 32.439278] __vm_munmap+0x138/0x3a0 [ 32.439803] __x64_sys_munmap+0x59/0x80 [ 32.440378] do_syscall_64+0x3f/0x90 [ 32.440911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.441618] [ 32.441854] The buggy address belongs to the object at ffff88800d951570 [ 32.441854] which belongs to the cache vm_area_struct of size 168 [ 32.443450] The buggy address is located 88 bytes inside of [ 32.443450] freed 168-byte region [ffff88800d951570, ffff88800d951618) [ 32.444981] [ 32.445216] The buggy address belongs to the physical page: [ 32.445952] page:00000000ef697bc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd951 [ 32.447152] memcg:ffff8880095cd801 [ 32.447643] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.448457] page_type: 0xffffffff() [ 32.448953] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 32.449971] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095cd801 [ 32.450977] page dumped because: kasan: bad access detected [ 32.451714] [ 32.451976] Memory state around the buggy address: [ 32.452628] ffff88800d951480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.453591] ffff88800d951500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.454555] >ffff88800d951580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.455522] ^ [ 32.456277] ffff88800d951600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 32.457235] ffff88800d951680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.458140] ================================================================== [ 32.459148] Disabling lock debugging due to kernel taint [ 34.633301] BUG: Bad rss-counter state mm:00000000f87a860d type:MM_FILEPAGES val:33 [ 34.634299] BUG: Bad rss-counter state mm:00000000f87a860d type:MM_ANONPAGES val:22 [ 35.109220] BUG: Bad rss-counter state mm:0000000024e10352 type:MM_FILEPAGES val:33 [ 35.110280] BUG: Bad rss-counter state mm:0000000024e10352 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6086' (ECDSA) to the list of known hosts. 2023/06/19 21:01:55 fuzzer started 2023/06/19 21:01:55 dialing manager at localhost:44161 2023/06/19 21:01:55 checking machine... 2023/06/19 21:01:55 checking revisions... [ 35.824761] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:01:56 testing simple program... [ 35.873768] cgroup: Unknown subsys name 'net' [ 35.911583] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:01:54 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c9df9c0 RCX=ffff88800c9df998 RDX=1ffff1100193bf3a RSI=ffffffff813ad6d0 RDI=ffff88800c9df9d0 RBP=ffff88800c9df990 RSP=ffff88800c9df8d8 R8 =0000000000000001 R9 =ffff88800c9df938 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800c9df9c0 R13=0000000000000000 R14=ffff888018218000 R15=0000000000092cc0 RIP=ffffffff813ad446 RFL=00000296 [--S-AP-] 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 00007f06ba302900 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=00007f06ba8b9618 CR3=000000000c836000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f247790b038 CR3=000000000d9be000 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=5c1084a7c8db529734437e1fc0c7288f XMM02=000000000011e128ec2efd57dc4c00df XMM03=0000000000124e50ea36654c9675b071 XMM04=32f918d909475ae400000000000ae988 XMM05=e4cb8bb95a7664b600000000001349b8 XMM06=c291bd5c70af25b90000000000134840 XMM07=e042d86d42eb936e00000000001250d0 XMM08=ea36654c9675b071000000000011e188 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000