[ 23.779696] BUG: Bad rss-counter state mm:00000000efbac9db type:MM_FILEPAGES val:33 [ 23.780868] BUG: Bad rss-counter state mm:00000000efbac9db type:MM_ANONPAGES val:22 [ 23.821181] ================================================================== [ 23.822203] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.823166] Read of size 8 at addr ffff88800d97c4e0 by task sshd/219 [ 23.823971] [ 23.824200] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.825086] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.826070] Call Trace: [ 23.826393] [ 23.826696] dump_stack_lvl+0x91/0xf0 [ 23.827193] print_report+0xcc/0x620 [ 23.827678] ? __virt_addr_valid+0x102/0x340 [ 23.828316] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.829011] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.829699] kasan_report+0xbe/0xf0 [ 23.830223] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.830907] vma_interval_tree_remove+0xc75/0xec0 [ 23.831514] vma_prepare+0xc54/0x11a0 [ 23.832001] __split_vma+0x5af/0x950 [ 23.832474] ? __pfx___split_vma+0x10/0x10 [ 23.833010] ? find_held_lock+0x2c/0x110 [ 23.833536] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.834100] ? lock_is_held_type+0x9f/0x120 [ 23.834654] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.835275] ? mtree_range_walk+0x632/0x900 [ 23.835836] ? mas_walk+0x5c7/0x7c0 [ 23.836313] do_vmi_munmap+0x1f1/0x2b0 [ 23.836815] mmap_region+0x1f9/0x2660 [ 23.837312] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.837843] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.838565] ? __pfx_lock_acquire+0x10/0x10 [ 23.839099] ? __pfx_mmap_region+0x10/0x10 [ 23.839637] ? security_mmap_addr+0x7d/0xa0 [ 23.840176] ? get_unmapped_area+0x1f5/0x3f0 [ 23.840734] do_mmap+0x854/0xf00 [ 23.841178] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.841675] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.842241] ksys_mmap_pgoff+0x3af/0x500 [ 23.842774] do_syscall_64+0x3f/0x90 [ 23.843262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.843925] RIP: 0033:0x7f88d193fd82 [ 23.844387] 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 [ 23.846516] RSP: 002b:00007ffc637151d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.847430] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88d193fd82 [ 23.848277] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88d0d79000 [ 23.849122] RBP: 00007f88d0d79000 R08: 0000000000000009 R09: 0000000000001000 [ 23.849977] R10: 0000000000000812 R11: 0000000000000206 R12: 00005604108a9f60 [ 23.850845] R13: 00007ffc637151f0 R14: 00007ffc63715220 R15: 00007ffc63715580 [ 23.851696] [ 23.851991] [ 23.852209] Allocated by task 212: [ 23.852646] kasan_save_stack+0x22/0x50 [ 23.853165] kasan_set_track+0x25/0x30 [ 23.853675] __kasan_slab_alloc+0x59/0x70 [ 23.854204] kmem_cache_alloc+0x16b/0x370 [ 23.854757] vm_area_dup+0x20/0x160 [ 23.855215] __split_vma+0x170/0x950 [ 23.855684] split_vma+0xc6/0x110 [ 23.856137] mprotect_fixup+0x8d2/0xb30 [ 23.856645] do_mprotect_pkey+0x87e/0xd40 [ 23.857178] __x64_sys_mprotect+0x78/0xc0 [ 23.857706] do_syscall_64+0x3f/0x90 [ 23.858193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.858869] [ 23.859092] Freed by task 212: [ 23.859486] kasan_save_stack+0x22/0x50 [ 23.860001] kasan_set_track+0x25/0x30 [ 23.860507] kasan_save_free_info+0x2b/0x50 [ 23.861045] __kasan_slab_free+0x10a/0x190 [ 23.861587] kmem_cache_free+0x10d/0x4d0 [ 23.862100] rcu_core+0x8c8/0x2860 [ 23.862555] __do_softirq+0x1b7/0x7d4 [ 23.863032] [ 23.863255] Last potentially related work creation: [ 23.863847] kasan_save_stack+0x22/0x50 [ 23.864350] __kasan_record_aux_stack+0x8e/0xa0 [ 23.864924] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.865578] remove_vma+0x139/0x170 [ 23.866031] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.866603] do_vmi_munmap+0x1f1/0x2b0 [ 23.867097] __vm_munmap+0x138/0x3a0 [ 23.867569] __x64_sys_munmap+0x59/0x80 [ 23.868077] do_syscall_64+0x3f/0x90 [ 23.868556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.869197] [ 23.869411] Second to last potentially related work creation: [ 23.870094] kasan_save_stack+0x22/0x50 [ 23.870614] __kasan_record_aux_stack+0x8e/0xa0 [ 23.871196] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.871851] remove_vma+0x139/0x170 [ 23.872302] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.872864] do_vmi_munmap+0x1f1/0x2b0 [ 23.873357] mmap_region+0x1f9/0x2660 [ 23.873838] do_mmap+0x854/0xf00 [ 23.874266] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.874771] ksys_mmap_pgoff+0x3af/0x500 [ 23.875278] do_syscall_64+0x3f/0x90 [ 23.875762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.876403] [ 23.876622] The buggy address belongs to the object at ffff88800d97c488 [ 23.876622] which belongs to the cache vm_area_struct of size 168 [ 23.878093] The buggy address is located 88 bytes inside of [ 23.878093] freed 168-byte region [ffff88800d97c488, ffff88800d97c530) [ 23.879513] [ 23.879736] The buggy address belongs to the physical page: [ 23.880409] page:00000000795ef56a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd97c [ 23.881519] memcg:ffff8880094b6301 [ 23.881951] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.882681] page_type: 0xffffffff() [ 23.883143] raw: 0100000000000200 ffff8880087a0c80 ffffea0000378dc0 dead000000000004 [ 23.884187] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094b6301 [ 23.885121] page dumped because: kasan: bad access detected [ 23.885797] [ 23.886022] Memory state around the buggy address: [ 23.886638] ffff88800d97c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 23.887514] ffff88800d97c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 23.888393] >ffff88800d97c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.889272] ^ [ 23.890050] ffff88800d97c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 23.890937] ffff88800d97c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.891820] ================================================================== [ 23.892918] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.467774] BUG: Bad rss-counter state mm:00000000841f4d50 type:MM_FILEPAGES val:33 [ 25.468947] BUG: Bad rss-counter state mm:00000000841f4d50 type:MM_ANONPAGES val:22 [ 25.957183] BUG: Bad rss-counter state mm:000000005d08f381 type:MM_FILEPAGES val:33 [ 25.958192] BUG: Bad rss-counter state mm:000000005d08f381 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37538' (ECDSA) to the list of known hosts. 2023/06/21 02:46:26 fuzzer started 2023/06/21 02:46:26 dialing manager at localhost:36067 2023/06/21 02:46:26 checking machine... 2023/06/21 02:46:26 checking revisions... [ 26.715031] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:46:26 testing simple program... [ 26.767972] cgroup: Unknown subsys name 'net' [ 26.829817] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:46:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce3de20 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81806deb RDI=0000000000000000 RBP=ffff888016c57bb0 RSP=ffff888016c57af0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffffffff81806f71 R12=ffff88800844f780 R13=0000000000000000 R14=ffffea00003806c0 R15=ffff88806ce3de00 RIP=ffffffff81806e5f RFL=00000046 [---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 00007f64f5d23900 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=00007f64f62da618 CR3=000000000f306000 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=36343a3230203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303333 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=000000120b9a9340 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000012 RSI=ffff88806cf28140 RDI=00000000000535db RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000eea30 R11=0000000000000001 R12=00000000000535db R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff81106295 RFL=00000016 [----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2677658700 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=00007f312b340990 CR3=00000000099d2000 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=2035323a36343a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a36343a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000