syzkaller login: [ 30.648631] BUG: Bad rss-counter state mm:000000009b4f3001 type:MM_FILEPAGES val:33 [ 30.650046] BUG: Bad rss-counter state mm:000000009b4f3001 type:MM_ANONPAGES val:22 [ 30.796172] ================================================================== [ 30.797071] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.798023] Read of size 8 at addr ffff88800cd44140 by task sshd/221 [ 30.798779] [ 30.798997] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.800059] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.801023] Call Trace: [ 30.801354] [ 30.801633] dump_stack_lvl+0x91/0xf0 [ 30.802122] print_report+0xcc/0x620 [ 30.802606] ? __virt_addr_valid+0x102/0x340 [ 30.803154] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.803759] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.804372] kasan_report+0xbe/0xf0 [ 30.804839] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.805473] vma_interval_tree_remove+0xc75/0xec0 [ 30.806073] vma_prepare+0xc54/0x11a0 [ 30.806543] __split_vma+0x5af/0x950 [ 30.807010] ? __pfx___split_vma+0x10/0x10 [ 30.807534] ? find_held_lock+0x2c/0x110 [ 30.808048] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.808610] ? lock_is_held_type+0x9f/0x120 [ 30.809142] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.809746] ? mtree_range_walk+0x632/0x900 [ 30.810291] ? mas_walk+0x5c7/0x7c0 [ 30.810764] do_vmi_munmap+0x1f1/0x2b0 [ 30.811247] mmap_region+0x1f9/0x2660 [ 30.811726] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.812228] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.812928] ? __pfx_lock_acquire+0x10/0x10 [ 30.813474] ? __pfx_mmap_region+0x10/0x10 [ 30.813997] ? security_mmap_addr+0x7d/0xa0 [ 30.814526] ? get_unmapped_area+0x1f5/0x3f0 [ 30.815065] do_mmap+0x854/0xf00 [ 30.815507] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.815996] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.816557] ksys_mmap_pgoff+0x3af/0x500 [ 30.817056] do_syscall_64+0x3f/0x90 [ 30.817551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.818193] RIP: 0033:0x7f2df54c4d82 [ 30.818645] 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 [ 30.820740] RSP: 002b:00007ffce7e74618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.821635] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2df54c4d82 [ 30.822473] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2df48fe000 [ 30.823316] RBP: 00007f2df48fe000 R08: 0000000000000009 R09: 0000000000001000 [ 30.824159] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f1a6d7b20 [ 30.825008] R13: 00007ffce7e74630 R14: 00007ffce7e74660 R15: 00007ffce7e749c0 [ 30.825881] [ 30.826174] [ 30.826390] Allocated by task 214: [ 30.826817] kasan_save_stack+0x22/0x50 [ 30.827325] kasan_set_track+0x25/0x30 [ 30.827814] __kasan_slab_alloc+0x59/0x70 [ 30.828336] kmem_cache_alloc+0x16b/0x370 [ 30.828841] vm_area_dup+0x20/0x160 [ 30.829294] __split_vma+0x170/0x950 [ 30.829765] split_vma+0xc6/0x110 [ 30.830199] mprotect_fixup+0x8d2/0xb30 [ 30.830691] do_mprotect_pkey+0x87e/0xd40 [ 30.831202] __x64_sys_mprotect+0x78/0xc0 [ 30.831718] do_syscall_64+0x3f/0x90 [ 30.832191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.832826] [ 30.833043] Freed by task 211: [ 30.833443] kasan_save_stack+0x22/0x50 [ 30.833951] kasan_set_track+0x25/0x30 [ 30.834439] kasan_save_free_info+0x2b/0x50 [ 30.834959] __kasan_slab_free+0x10a/0x190 [ 30.835491] kmem_cache_free+0x10d/0x4d0 [ 30.835989] rcu_core+0x8c8/0x2860 [ 30.836430] __do_softirq+0x1b7/0x7d4 [ 30.836909] [ 30.837121] Last potentially related work creation: [ 30.837717] kasan_save_stack+0x22/0x50 [ 30.838215] __kasan_record_aux_stack+0x8e/0xa0 [ 30.838777] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.839412] remove_vma+0x139/0x170 [ 30.839862] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.840413] do_vmi_munmap+0x1f1/0x2b0 [ 30.840966] __vm_munmap+0x138/0x3a0 [ 30.841436] __x64_sys_munmap+0x59/0x80 [ 30.841926] do_syscall_64+0x3f/0x90 [ 30.842398] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.843035] [ 30.843254] The buggy address belongs to the object at ffff88800cd440e8 [ 30.843254] which belongs to the cache vm_area_struct of size 168 [ 30.844700] The buggy address is located 88 bytes inside of [ 30.844700] freed 168-byte region [ffff88800cd440e8, ffff88800cd44190) [ 30.846115] [ 30.846332] The buggy address belongs to the physical page: [ 30.847019] page:00000000809ee57b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcd44 [ 30.848163] memcg:ffff888016547701 [ 30.848611] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.849290] page_type: 0xffffffff() [ 30.849773] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.850736] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016547701 [ 30.851691] page dumped because: kasan: bad access detected [ 30.852387] [ 30.852607] Memory state around the buggy address: [ 30.853215] ffff88800cd44000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.854157] ffff88800cd44080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.855061] >ffff88800cd44100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.855963] ^ [ 30.856629] ffff88800cd44180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.857535] ffff88800cd44200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.858430] ================================================================== [ 30.859458] Disabling lock debugging due to kernel taint [ 33.059188] BUG: Bad rss-counter state mm:00000000175cefc2 type:MM_FILEPAGES val:33 [ 33.060414] BUG: Bad rss-counter state mm:00000000175cefc2 type:MM_ANONPAGES val:22 [ 33.450292] BUG: Bad rss-counter state mm:00000000ca2ac6ea type:MM_FILEPAGES val:33 [ 33.451810] BUG: Bad rss-counter state mm:00000000ca2ac6ea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30235' (ECDSA) to the list of known hosts. 2023/06/21 06:09:56 fuzzer started 2023/06/21 06:09:56 dialing manager at localhost:36067 2023/06/21 06:09:56 checking machine... 2023/06/21 06:09:56 checking revisions... [ 34.188345] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:09:56 testing simple program... [ 34.241340] cgroup: Unknown subsys name 'net' [ 34.297126] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:09:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=ffff8880103551c0 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff110028c9e38 RSP=ffff88801464f1a8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=0000000000092820 RIP=ffffffff8180fea8 RFL=00000256 [---ZAP-] 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 00007f31cc99f700 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=00007f46660050b0 CR3=000000000dafa000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3133325b646873732035353a3930 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303133 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007fa99daec670 CR3=000000000dafa000 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=2035353a39303a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a39303a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000