syzkaller login: [ 39.264828] BUG: Bad rss-counter state mm:000000001405b5f6 type:MM_FILEPAGES val:33 [ 39.265787] BUG: Bad rss-counter state mm:000000001405b5f6 type:MM_ANONPAGES val:22 [ 39.445605] ================================================================== [ 39.446638] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.447817] Read of size 8 at addr ffff8880198c1058 by task sshd/220 [ 39.448732] [ 39.448988] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.450023] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.451184] Call Trace: [ 39.451548] [ 39.451875] dump_stack_lvl+0x91/0xf0 [ 39.452442] print_report+0xcc/0x620 [ 39.452996] ? __virt_addr_valid+0x102/0x340 [ 39.453627] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.454328] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.455050] kasan_report+0xbe/0xf0 [ 39.455594] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.456303] vma_interval_tree_remove+0xc75/0xec0 [ 39.456998] vma_prepare+0xc54/0x11a0 [ 39.457545] __split_vma+0x5af/0x950 [ 39.458115] ? __pfx___split_vma+0x10/0x10 [ 39.458763] ? find_held_lock+0x2c/0x110 [ 39.459416] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.460116] ? lock_is_held_type+0x9f/0x120 [ 39.460769] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.461498] ? mtree_range_walk+0x632/0x900 [ 39.462154] ? mas_walk+0x5c7/0x7c0 [ 39.462714] do_vmi_munmap+0x1f1/0x2b0 [ 39.463313] mmap_region+0x1f9/0x2660 [ 39.463903] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.464488] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.465300] ? __pfx_lock_acquire+0x10/0x10 [ 39.465909] ? __pfx_mmap_region+0x10/0x10 [ 39.466512] ? security_mmap_addr+0x7d/0xa0 [ 39.467140] ? get_unmapped_area+0x1f5/0x3f0 [ 39.467779] do_mmap+0x854/0xf00 [ 39.468312] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.468926] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.469621] ksys_mmap_pgoff+0x3af/0x500 [ 39.470231] do_syscall_64+0x3f/0x90 [ 39.470803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.471571] RIP: 0033:0x7f6c84567d82 [ 39.472128] 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 [ 39.474671] RSP: 002b:00007fff322d9de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.475769] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6c84567d82 [ 39.476780] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6c839a1000 [ 39.477810] RBP: 00007f6c839a1000 R08: 0000000000000009 R09: 0000000000001000 [ 39.478827] R10: 0000000000000812 R11: 0000000000000206 R12: 000056298cf05d90 [ 39.479866] R13: 00007fff322d9e00 R14: 00007fff322d9e30 R15: 00007fff322da190 [ 39.480887] [ 39.481229] [ 39.481485] Allocated by task 211: [ 39.481990] kasan_save_stack+0x22/0x50 [ 39.482598] kasan_set_track+0x25/0x30 [ 39.483190] __kasan_slab_alloc+0x59/0x70 [ 39.483824] kmem_cache_alloc+0x16b/0x370 [ 39.484442] vm_area_dup+0x20/0x160 [ 39.484986] __split_vma+0x170/0x950 [ 39.485540] split_vma+0xc6/0x110 [ 39.486069] mprotect_fixup+0x8d2/0xb30 [ 39.486670] do_mprotect_pkey+0x87e/0xd40 [ 39.487307] __x64_sys_mprotect+0x78/0xc0 [ 39.487934] do_syscall_64+0x3f/0x90 [ 39.488493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.489313] [ 39.489565] Freed by task 211: [ 39.490049] kasan_save_stack+0x22/0x50 [ 39.490652] kasan_set_track+0x25/0x30 [ 39.491261] kasan_save_free_info+0x2b/0x50 [ 39.491888] __kasan_slab_free+0x10a/0x190 [ 39.492527] kmem_cache_free+0x10d/0x4d0 [ 39.493132] rcu_core+0x8c8/0x2860 [ 39.493669] __do_softirq+0x1b7/0x7d4 [ 39.494242] [ 39.494499] Last potentially related work creation: [ 39.495219] kasan_save_stack+0x22/0x50 [ 39.495819] __kasan_record_aux_stack+0x8e/0xa0 [ 39.496505] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.497262] remove_vma+0x139/0x170 [ 39.497799] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.498443] do_vmi_munmap+0x1f1/0x2b0 [ 39.499037] __vm_munmap+0x138/0x3a0 [ 39.499597] __x64_sys_munmap+0x59/0x80 [ 39.500185] do_syscall_64+0x3f/0x90 [ 39.500751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.501516] [ 39.501771] Second to last potentially related work creation: [ 39.502597] kasan_save_stack+0x22/0x50 [ 39.503195] __kasan_record_aux_stack+0x8e/0xa0 [ 39.503862] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.504629] remove_vma+0x139/0x170 [ 39.505167] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.505827] do_vmi_munmap+0x1f1/0x2b0 [ 39.506399] mmap_region+0x1f9/0x2660 [ 39.507000] do_mmap+0x854/0xf00 [ 39.507524] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.508100] ksys_mmap_pgoff+0x3af/0x500 [ 39.508701] do_syscall_64+0x3f/0x90 [ 39.509278] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.510048] [ 39.510304] The buggy address belongs to the object at ffff8880198c1000 [ 39.510304] which belongs to the cache vm_area_struct of size 168 [ 39.512078] The buggy address is located 88 bytes inside of [ 39.512078] freed 168-byte region [ffff8880198c1000, ffff8880198c10a8) [ 39.513765] [ 39.514025] The buggy address belongs to the physical page: [ 39.514816] page:00000000fffe40f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x198c1 [ 39.516111] memcg:ffff88800c786301 [ 39.516602] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.517434] page_type: 0xffffffff() [ 39.517976] raw: 0100000000000200 ffff88800879fc80 ffffea0000518480 000000000000000b [ 39.519087] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c786301 [ 39.520173] page dumped because: kasan: bad access detected [ 39.520974] [ 39.521231] Memory state around the buggy address: [ 39.521924] ffff8880198c0f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.522950] ffff8880198c0f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.523978] >ffff8880198c1000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.525009] ^ [ 39.525880] ffff8880198c1080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 39.526911] ffff8880198c1100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.527962] ================================================================== [ 39.529053] Disabling lock debugging due to kernel taint [ 41.584783] BUG: Bad rss-counter state mm:00000000ed1ca8fc type:MM_FILEPAGES val:33 [ 41.585998] BUG: Bad rss-counter state mm:00000000ed1ca8fc type:MM_ANONPAGES val:22 [ 41.954341] BUG: Bad rss-counter state mm:000000003b17cbfd type:MM_FILEPAGES val:33 [ 41.955125] BUG: Bad rss-counter state mm:000000003b17cbfd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51559' (ECDSA) to the list of known hosts. 2023/06/19 21:08:50 fuzzer started 2023/06/19 21:08:51 dialing manager at localhost:44161 2023/06/19 21:08:51 checking machine... 2023/06/19 21:08:51 checking revisions... [ 42.601436] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:08:51 testing simple program... [ 42.646520] cgroup: Unknown subsys name 'net' [ 42.687222] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:08:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800d46c420 RCX=ffffffff812e00e5 RDX=ffffed1002cfdf9a RSI=0000000000000004 RDI=ffff8880167efcd0 RBP=1ffff11002cfdf96 RSP=ffff8880167efca8 R8 =0000000000000001 R9 =ffffed1002cfdf9a R10=0000000000000003 R11=0000000000000000 R12=ffff88800d46c428 R13=ffff88800d46c430 R14=0000000014560007 R15=000000000f147067 RIP=ffffffff812e00e9 RFL=00000297 [--S-APC] 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 00007fa5652f2900 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=00007fa5658ac34c CR3=000000000ee8e000 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=6720646572637465733a4d41503d706f 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 info registers vcpu 1 RAX=1ffffffff0a57cb9 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a2954 RDI=ffffffff852be5c8 RBP=ffff88800fc67d28 RSP=ffff88800fc67c60 R8 =0000000000000006 R9 =00000000c000003e R10=00000000c000003e R11=0000000000000000 R12=00000000000000a5 R13=ffff88800fc67d60 R14=00000000000000a5 R15=ffffc900006a9080 RIP=ffffffff815a298f 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 00007ff639bc58c0 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=00007fffe38c3c58 CR3=000000000cc40000 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=0000ff00000000000000000000000000 XMM02=616c756765723a6d726f6674616c702b XMM03=00302e79726f74616c756765723a6d72 XMM04=2f2f2f2f2f2f2f2f2f2f2f2f2f2f2f2f XMM05=000000050000000300005575191179d0 XMM06=00005575191119000000000000000009 XMM07=00000000000000000000000000000000 XMM08=74616c756765723a6d726f6674616c70 XMM09=00000000000000000000000000000000 XMM10=00000000000020000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000