syzkaller login: [ 30.689404] BUG: Bad rss-counter state mm:000000004ee270aa type:MM_FILEPAGES val:33 [ 30.691744] BUG: Bad rss-counter state mm:000000004ee270aa type:MM_ANONPAGES val:22 [ 30.853851] ================================================================== [ 30.854904] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.856019] Read of size 8 at addr ffff888016a33140 by task sshd/221 [ 30.856927] [ 30.857136] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.857941] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.858880] Call Trace: [ 30.859190] [ 30.859462] dump_stack_lvl+0x91/0xf0 [ 30.859926] print_report+0xcc/0x620 [ 30.860387] ? __virt_addr_valid+0x102/0x340 [ 30.860903] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.861486] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.862060] kasan_report+0xbe/0xf0 [ 30.862517] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.863111] vma_interval_tree_remove+0xc75/0xec0 [ 30.863703] vma_prepare+0xc54/0x11a0 [ 30.864164] __split_vma+0x5af/0x950 [ 30.864623] ? __pfx___split_vma+0x10/0x10 [ 30.865152] ? find_held_lock+0x2c/0x110 [ 30.865659] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.866213] ? lock_is_held_type+0x9f/0x120 [ 30.866749] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.867379] ? mtree_range_walk+0x632/0x900 [ 30.867926] ? mas_walk+0x5c7/0x7c0 [ 30.868404] do_vmi_munmap+0x1f1/0x2b0 [ 30.868888] mmap_region+0x1f9/0x2660 [ 30.869367] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.869876] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.870583] ? __pfx_lock_acquire+0x10/0x10 [ 30.871124] ? __pfx_mmap_region+0x10/0x10 [ 30.871644] ? security_mmap_addr+0x7d/0xa0 [ 30.872173] ? get_unmapped_area+0x1f5/0x3f0 [ 30.872716] do_mmap+0x854/0xf00 [ 30.873153] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.873636] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.874195] ksys_mmap_pgoff+0x3af/0x500 [ 30.874687] do_syscall_64+0x3f/0x90 [ 30.875167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.875803] RIP: 0033:0x7f2559a69d82 [ 30.876262] 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 [ 30.878368] RSP: 002b:00007ffcab279208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.879277] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2559a69d82 [ 30.880116] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2558ea3000 [ 30.880944] RBP: 00007f2558ea3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.881770] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557556458ec0 [ 30.882607] R13: 00007ffcab279220 R14: 00007ffcab279250 R15: 00007ffcab2795b0 [ 30.883448] [ 30.883731] [ 30.883943] Allocated by task 214: [ 30.884364] kasan_save_stack+0x22/0x50 [ 30.884859] kasan_set_track+0x25/0x30 [ 30.885342] __kasan_slab_alloc+0x59/0x70 [ 30.885865] kmem_cache_alloc+0x16b/0x370 [ 30.886372] vm_area_dup+0x20/0x160 [ 30.886820] __split_vma+0x170/0x950 [ 30.887291] split_vma+0xc6/0x110 [ 30.887721] mprotect_fixup+0x8d2/0xb30 [ 30.888214] do_mprotect_pkey+0x87e/0xd40 [ 30.888735] __x64_sys_mprotect+0x78/0xc0 [ 30.889248] do_syscall_64+0x3f/0x90 [ 30.889718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.890362] [ 30.890574] Freed by task 214: [ 30.890964] kasan_save_stack+0x22/0x50 [ 30.891466] kasan_set_track+0x25/0x30 [ 30.891955] kasan_save_free_info+0x2b/0x50 [ 30.892483] __kasan_slab_free+0x10a/0x190 [ 30.893008] kmem_cache_free+0x10d/0x4d0 [ 30.893518] rcu_core+0x8c8/0x2860 [ 30.893957] __do_softirq+0x1b7/0x7d4 [ 30.894427] [ 30.894637] Last potentially related work creation: [ 30.895227] kasan_save_stack+0x22/0x50 [ 30.895723] __kasan_record_aux_stack+0x8e/0xa0 [ 30.896300] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.896926] remove_vma+0x139/0x170 [ 30.897370] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.898017] do_vmi_munmap+0x1f1/0x2b0 [ 30.898495] __vm_munmap+0x138/0x3a0 [ 30.898963] __x64_sys_munmap+0x59/0x80 [ 30.899459] do_syscall_64+0x3f/0x90 [ 30.899928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.900564] [ 30.900773] The buggy address belongs to the object at ffff888016a330e8 [ 30.900773] which belongs to the cache vm_area_struct of size 168 [ 30.902227] The buggy address is located 88 bytes inside of [ 30.902227] freed 168-byte region [ffff888016a330e8, ffff888016a33190) [ 30.903631] [ 30.903841] The buggy address belongs to the physical page: [ 30.904486] page:00000000c9857e3c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a33 [ 30.905553] memcg:ffff88800fcec101 [ 30.905967] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.906601] page_type: 0xffffffff() [ 30.907055] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.907968] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fcec101 [ 30.908865] page dumped because: kasan: bad access detected [ 30.909520] [ 30.909733] Memory state around the buggy address: [ 30.910308] ffff888016a33000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.911152] ffff888016a33080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.911986] >ffff888016a33100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.912839] ^ [ 30.913472] ffff888016a33180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.914323] ffff888016a33200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.915183] ================================================================== [ 30.916080] Disabling lock debugging due to kernel taint [ 32.880907] BUG: Bad rss-counter state mm:000000007283455a type:MM_FILEPAGES val:33 [ 32.881923] BUG: Bad rss-counter state mm:000000007283455a type:MM_ANONPAGES val:22 [ 33.365532] BUG: Bad rss-counter state mm:00000000ac36ce50 type:MM_FILEPAGES val:33 [ 33.366667] BUG: Bad rss-counter state mm:00000000ac36ce50 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24241' (ECDSA) to the list of known hosts. 2023/06/20 21:27:30 fuzzer started 2023/06/20 21:27:30 dialing manager at localhost:36067 2023/06/20 21:27:30 checking machine... 2023/06/20 21:27:30 checking revisions... [ 34.069703] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:27:30 testing simple program... [ 34.111353] cgroup: Unknown subsys name 'net' [ 34.159343] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:27:30 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff888015c1fdd8 RSI=ffff888015c1fda0 RDI=ffff88806ce09aa8 RBP=ffff88806ce09b30 RSP=ffff88806ce09a98 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000023906 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88801463b680 R15=ffff88800dbcda00 RIP=ffffffff810bd05d 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 00007f648721c900 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=00007f648665c580 CR3=000000000d82a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=df88694257e1e09800000000000ae988 XMM05=81e6e2f9cd7c2bc90000000000133288 XMM06=e4cb8bb95a7664b60000000000132140 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ff8f95720b0 CR3=000000000dc4c000 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=2030333a37323a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a37323a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000