syzkaller login: [ 51.478481] BUG: Bad rss-counter state mm:00000000365dc03c type:MM_FILEPAGES val:33 [ 51.479686] BUG: Bad rss-counter state mm:00000000365dc03c type:MM_ANONPAGES val:22 [ 51.617572] ================================================================== [ 51.618191] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.618847] Read of size 8 at addr ffff88800999f228 by task sshd/219 [ 51.619368] [ 51.619516] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.620090] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.620747] Call Trace: [ 51.620963] [ 51.621154] dump_stack_lvl+0x91/0xf0 [ 51.621607] print_report+0xcc/0x620 [ 51.621956] ? __virt_addr_valid+0x102/0x340 [ 51.622335] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.622759] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.623174] kasan_report+0xbe/0xf0 [ 51.623497] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.623930] vma_interval_tree_remove+0xc75/0xec0 [ 51.624339] vma_prepare+0xc54/0x11a0 [ 51.624663] __split_vma+0x5af/0x950 [ 51.624981] ? __pfx___split_vma+0x10/0x10 [ 51.625339] ? find_held_lock+0x2c/0x110 [ 51.625693] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.626073] ? lock_is_held_type+0x9f/0x120 [ 51.626437] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.626872] ? mtree_range_walk+0x632/0x900 [ 51.627246] ? mas_walk+0x5c7/0x7c0 [ 51.627567] do_vmi_munmap+0x1f1/0x2b0 [ 51.627897] mmap_region+0x1f9/0x2660 [ 51.628225] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.628571] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.629050] ? __pfx_lock_acquire+0x10/0x10 [ 51.629406] ? __pfx_mmap_region+0x10/0x10 [ 51.629763] ? security_mmap_addr+0x7d/0xa0 [ 51.630123] ? get_unmapped_area+0x1f5/0x3f0 [ 51.630503] do_mmap+0x854/0xf00 [ 51.630802] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.631134] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.631516] ksys_mmap_pgoff+0x3af/0x500 [ 51.631861] do_syscall_64+0x3f/0x90 [ 51.632185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.632616] RIP: 0033:0x7f1855fb9d82 [ 51.632922] 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 [ 51.634343] RSP: 002b:00007ffc23bf6cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.634966] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1855fb9d82 [ 51.635537] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f18553f3000 [ 51.636104] RBP: 00007f18553f3000 R08: 0000000000000009 R09: 0000000000001000 [ 51.636673] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564fd9f09f70 [ 51.637240] R13: 00007ffc23bf6ce0 R14: 00007ffc23bf6d10 R15: 00007ffc23bf7070 [ 51.637816] [ 51.638015] [ 51.638164] Allocated by task 212: [ 51.638474] kasan_save_stack+0x22/0x50 [ 51.638816] kasan_set_track+0x25/0x30 [ 51.639153] __kasan_slab_alloc+0x59/0x70 [ 51.639506] kmem_cache_alloc+0x16b/0x370 [ 51.639852] vm_area_dup+0x20/0x160 [ 51.640159] __split_vma+0x170/0x950 [ 51.640474] split_vma+0xc6/0x110 [ 51.640771] mprotect_fixup+0x8d2/0xb30 [ 51.641109] do_mprotect_pkey+0x87e/0xd40 [ 51.641459] __x64_sys_mprotect+0x78/0xc0 [ 51.641811] do_syscall_64+0x3f/0x90 [ 51.642130] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.642569] [ 51.642715] Freed by task 19: [ 51.642972] kasan_save_stack+0x22/0x50 [ 51.643311] kasan_set_track+0x25/0x30 [ 51.643641] kasan_save_free_info+0x2b/0x50 [ 51.643995] __kasan_slab_free+0x10a/0x190 [ 51.644353] kmem_cache_free+0x10d/0x4d0 [ 51.644697] rcu_core+0x8c8/0x2860 [ 51.644999] __do_softirq+0x1b7/0x7d4 [ 51.645322] [ 51.645467] Last potentially related work creation: [ 51.645859] kasan_save_stack+0x22/0x50 [ 51.646201] __kasan_record_aux_stack+0x8e/0xa0 [ 51.646598] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.647031] remove_vma+0x139/0x170 [ 51.647334] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.647705] do_vmi_munmap+0x1f1/0x2b0 [ 51.648030] __vm_munmap+0x138/0x3a0 [ 51.648343] __x64_sys_munmap+0x59/0x80 [ 51.648673] do_syscall_64+0x3f/0x90 [ 51.648987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.649416] [ 51.649561] The buggy address belongs to the object at ffff88800999f1d0 [ 51.649561] which belongs to the cache vm_area_struct of size 168 [ 51.650666] The buggy address is located 88 bytes inside of [ 51.650666] freed 168-byte region [ffff88800999f1d0, ffff88800999f278) [ 51.652356] [ 51.652611] The buggy address belongs to the physical page: [ 51.653388] page:00000000f0be6be2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x999f [ 51.654704] memcg:ffff888017470d01 [ 51.655188] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 51.655928] page_type: 0xffffffff() [ 51.656409] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 51.657381] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017470d01 [ 51.658339] page dumped because: kasan: bad access detected [ 51.659052] [ 51.659282] Memory state around the buggy address: [ 51.659900] ffff88800999f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.660815] ffff88800999f180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 51.661750] >ffff88800999f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 51.662673] ^ [ 51.663072] ffff88800999f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 51.663676] ffff88800999f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 51.664291] ================================================================== [ 51.665141] Disabling lock debugging due to kernel taint [ 54.424136] BUG: Bad rss-counter state mm:00000000087bd825 type:MM_FILEPAGES val:33 [ 54.425118] BUG: Bad rss-counter state mm:00000000087bd825 type:MM_ANONPAGES val:22 [ 54.911764] BUG: Bad rss-counter state mm:00000000d3166b61 type:MM_FILEPAGES val:33 [ 54.913160] BUG: Bad rss-counter state mm:00000000d3166b61 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43160' (ECDSA) to the list of known hosts. 2023/06/20 00:43:26 fuzzer started 2023/06/20 00:43:26 dialing manager at localhost:44161 2023/06/20 00:43:26 checking machine... 2023/06/20 00:43:26 checking revisions... [ 55.647646] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:43:26 testing simple program... [ 55.691555] cgroup: Unknown subsys name 'net' [ 55.743463] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:42:58 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=ffff888015de9680 RCX=0000000000000000 RDX=1ffff11001eb9220 RSI=ffffffff81b2894c RDI=ffff888015de9d30 RBP=ffff888015de93d0 RSP=ffff88801582f748 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000400 R11=00000000000b6c88 R12=ffff88800defc200 R13=ffff88800fedc000 R14=ffff88800fedc738 R15=ffff88800f5c9100 RIP=ffffffff81b28a17 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4673a46900 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=00007f4672f67028 CR3=000000000ed54000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=cc30c50d585ab01100000000000ae988 XMM05=788e38c8bc3a3b580000000000135c68 XMM06=dfcdbad4f1609c370000000000134790 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8180c584 RDX=00000000000080c5 RSI=00000000000080c5 RDI=ffffffff86507ed4 RBP=ffff8880166e6ff0 RSP=ffff8880166e6f28 R8 =0000000000000000 R9 =ffff8880166e6fd8 R10=0000000000038001 R11=0000000000020d8a R12=ffff8880166e6ff8 R13=ffff8880166e6fe0 R14=ffff8880166e6fd9 R15=ffff8880166e6f98 RIP=ffffffff8113077a RFL=00000213 [----A-C] 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 00007f4f48bdf900 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=00007f4f48bbe020 CR3=0000000019e54000 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=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