syzkaller login: [ 33.675713] BUG: Bad rss-counter state mm:0000000003b60430 type:MM_FILEPAGES val:33 [ 33.676987] BUG: Bad rss-counter state mm:0000000003b60430 type:MM_ANONPAGES val:22 [ 33.821233] ================================================================== [ 33.822274] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.823210] Read of size 8 at addr ffff8880102b0c20 by task sshd/221 [ 33.824067] [ 33.824347] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.825282] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.826331] Call Trace: [ 33.826671] [ 33.826973] dump_stack_lvl+0x91/0xf0 [ 33.827499] print_report+0xcc/0x620 [ 33.828019] ? __virt_addr_valid+0x102/0x340 [ 33.828603] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.829293] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.829952] kasan_report+0xbe/0xf0 [ 33.830464] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.831124] vma_interval_tree_remove+0xc75/0xec0 [ 33.831762] vma_prepare+0xc54/0x11a0 [ 33.832277] __split_vma+0x5af/0x950 [ 33.832784] ? __pfx___split_vma+0x10/0x10 [ 33.833368] ? find_held_lock+0x2c/0x110 [ 33.833921] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.834532] ? lock_is_held_type+0x9f/0x120 [ 33.835110] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.835764] ? mtree_range_walk+0x632/0x900 [ 33.836352] ? mas_walk+0x5c7/0x7c0 [ 33.836857] do_vmi_munmap+0x1f1/0x2b0 [ 33.837402] mmap_region+0x1f9/0x2660 [ 33.837924] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.838479] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.839245] ? __pfx_lock_acquire+0x10/0x10 [ 33.839817] ? __pfx_mmap_region+0x10/0x10 [ 33.840380] ? security_mmap_addr+0x7d/0xa0 [ 33.840951] ? get_unmapped_area+0x1f5/0x3f0 [ 33.841563] do_mmap+0x854/0xf00 [ 33.842032] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.842575] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.843181] ksys_mmap_pgoff+0x3af/0x500 [ 33.843728] do_syscall_64+0x3f/0x90 [ 33.844241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.844931] RIP: 0033:0x7f5be3366d82 [ 33.845434] 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 [ 33.847696] RSP: 002b:00007ffd6ee9e4a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.848670] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5be3366d82 [ 33.849592] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5be27a0000 [ 33.850502] RBP: 00007f5be27a0000 R08: 0000000000000009 R09: 0000000000001000 [ 33.851420] R10: 0000000000000812 R11: 0000000000000206 R12: 00005617f1df1d90 [ 33.852332] R13: 00007ffd6ee9e4c0 R14: 00007ffd6ee9e4f0 R15: 00007ffd6ee9e850 [ 33.853277] [ 33.853595] [ 33.853825] Allocated by task 214: [ 33.854285] kasan_save_stack+0x22/0x50 [ 33.854827] kasan_set_track+0x25/0x30 [ 33.855355] __kasan_slab_alloc+0x59/0x70 [ 33.855913] kmem_cache_alloc+0x16b/0x370 [ 33.856473] vm_area_dup+0x20/0x160 [ 33.856969] __split_vma+0x170/0x950 [ 33.857488] split_vma+0xc6/0x110 [ 33.857965] mprotect_fixup+0x8d2/0xb30 [ 33.858510] do_mprotect_pkey+0x87e/0xd40 [ 33.859068] __x64_sys_mprotect+0x78/0xc0 [ 33.859632] do_syscall_64+0x3f/0x90 [ 33.860148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.860834] [ 33.861067] Freed by task 214: [ 33.861515] kasan_save_stack+0x22/0x50 [ 33.862059] kasan_set_track+0x25/0x30 [ 33.862587] kasan_save_free_info+0x2b/0x50 [ 33.863167] __kasan_slab_free+0x10a/0x190 [ 33.863746] kmem_cache_free+0x10d/0x4d0 [ 33.864295] rcu_core+0x8c8/0x2860 [ 33.864772] __do_softirq+0x1b7/0x7d4 [ 33.865299] [ 33.865535] Last potentially related work creation: [ 33.866164] kasan_save_stack+0x22/0x50 [ 33.866702] __kasan_record_aux_stack+0x8e/0xa0 [ 33.867322] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.868018] remove_vma+0x139/0x170 [ 33.868508] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.869122] do_vmi_munmap+0x1f1/0x2b0 [ 33.869647] __vm_munmap+0x138/0x3a0 [ 33.870153] __x64_sys_munmap+0x59/0x80 [ 33.870692] do_syscall_64+0x3f/0x90 [ 33.871201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.871886] [ 33.872121] The buggy address belongs to the object at ffff8880102b0bc8 [ 33.872121] which belongs to the cache vm_area_struct of size 168 [ 33.873701] The buggy address is located 88 bytes inside of [ 33.873701] freed 168-byte region [ffff8880102b0bc8, ffff8880102b0c70) [ 33.875204] [ 33.875442] The buggy address belongs to the physical page: [ 33.876145] page:00000000d2132501 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102b0 [ 33.877328] memcg:ffff88800e21c001 [ 33.877781] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.878473] page_type: 0xffffffff() [ 33.878957] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.879934] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e21c001 [ 33.880910] page dumped because: kasan: bad access detected [ 33.881644] [ 33.881875] Memory state around the buggy address: [ 33.882496] ffff8880102b0b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.883422] ffff8880102b0b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.884344] >ffff8880102b0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.885269] ^ [ 33.885822] ffff8880102b0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.886742] ffff8880102b0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.887654] ================================================================== [ 33.888847] Disabling lock debugging due to kernel taint [ 36.593538] BUG: Bad rss-counter state mm:0000000085030775 type:MM_FILEPAGES val:33 [ 36.594744] BUG: Bad rss-counter state mm:0000000085030775 type:MM_ANONPAGES val:22 [ 37.086395] BUG: Bad rss-counter state mm:00000000da0b4f6e type:MM_FILEPAGES val:33 [ 37.087593] BUG: Bad rss-counter state mm:00000000da0b4f6e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37654' (ECDSA) to the list of known hosts. 2023/06/20 02:28:28 fuzzer started 2023/06/20 02:28:28 dialing manager at localhost:44161 2023/06/20 02:28:28 checking machine... 2023/06/20 02:28:28 checking revisions... [ 37.714433] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:28:28 testing simple program... [ 37.768647] cgroup: Unknown subsys name 'net' [ 37.814535] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:28:24 Registers: info registers vcpu 0 RAX=ffffffff80000000 RBX=ffff88800cf885f0 RCX=000000008015000f RDX=ffff88808cf885f0 RSI=ffff8880191c98f8 RDI=ffff8880087b6500 RBP=0000000000000000 RSP=ffff8880147af808 R8 =ffff88800cf885f0 R9 =0000000000000000 R10=ffffea0000647200 R11=000000008015000f R12=dffffc0000000000 R13=ffff8880147af848 R14=0000000000000000 R15=ffff8880191c98f8 RIP=ffffffff818101f6 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f731955a900 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=00007f73189535c0 CR3=000000000d81a000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=409af4899263299000000000000ae988 XMM05=a4014c12b9d983d10000000000135148 XMM06=c291bd5c70af25b900000000001341e8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000025 RCX=0000000000000000 RDX=0000000000000048 RSI=0000000000000000 RDI=ffff88801598fc20 RBP=0000000000000025 RSP=ffff88801598fa70 R8 =0000000000000000 R9 =ffff88801598fd68 R10=ffff88801598fc20 R11=00000000000b6996 R12=ffff88801598fd68 R13=0000000000000001 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8450d3e9 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 00007fe1efd69900 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=00007fff3b70e000 CR3=000000000eca4000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000