syzkaller login: [ 43.598186] BUG: Bad rss-counter state mm:0000000039324943 type:MM_FILEPAGES val:33 [ 43.599214] BUG: Bad rss-counter state mm:0000000039324943 type:MM_ANONPAGES val:22 [ 43.760737] ================================================================== [ 43.761670] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.762663] Read of size 8 at addr ffff88800f1b4310 by task sshd/224 [ 43.763565] [ 43.763781] CPU: 0 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.764657] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.765624] Call Trace: [ 43.765954] [ 43.766243] dump_stack_lvl+0x91/0xf0 [ 43.766744] print_report+0xcc/0x620 [ 43.767237] ? __virt_addr_valid+0x102/0x340 [ 43.767821] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.768445] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.769066] kasan_report+0xbe/0xf0 [ 43.769555] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.770206] vma_interval_tree_remove+0xc75/0xec0 [ 43.770806] vma_prepare+0xc54/0x11a0 [ 43.771291] __split_vma+0x5af/0x950 [ 43.771766] ? __pfx___split_vma+0x10/0x10 [ 43.772294] ? find_held_lock+0x2c/0x110 [ 43.772817] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.773387] ? lock_is_held_type+0x9f/0x120 [ 43.773934] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.774546] ? mtree_range_walk+0x632/0x900 [ 43.775105] ? mas_walk+0x5c7/0x7c0 [ 43.775605] do_vmi_munmap+0x1f1/0x2b0 [ 43.776100] mmap_region+0x1f9/0x2660 [ 43.776583] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.777102] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.777812] ? __pfx_lock_acquire+0x10/0x10 [ 43.778365] ? __pfx_mmap_region+0x10/0x10 [ 43.778943] ? security_mmap_addr+0x7d/0xa0 [ 43.779499] ? get_unmapped_area+0x1f5/0x3f0 [ 43.780060] do_mmap+0x854/0xf00 [ 43.780501] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.781002] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.781563] ksys_mmap_pgoff+0x3af/0x500 [ 43.782085] do_syscall_64+0x3f/0x90 [ 43.782558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.783231] RIP: 0033:0x7f7387b0fd82 [ 43.783721] 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 [ 43.785867] RSP: 002b:00007fff938c83f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.786782] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7387b0fd82 [ 43.787637] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7386f49000 [ 43.788481] RBP: 00007f7386f49000 R08: 0000000000000009 R09: 0000000000001000 [ 43.789322] R10: 0000000000000812 R11: 0000000000000206 R12: 00005575ae70bec0 [ 43.790180] R13: 00007fff938c8410 R14: 00007fff938c8440 R15: 00007fff938c87a0 [ 43.791046] [ 43.791354] [ 43.791573] Allocated by task 217: [ 43.792007] kasan_save_stack+0x22/0x50 [ 43.792510] kasan_set_track+0x25/0x30 [ 43.793014] __kasan_slab_alloc+0x59/0x70 [ 43.793539] kmem_cache_alloc+0x16b/0x370 [ 43.794056] vm_area_dup+0x20/0x160 [ 43.794511] __split_vma+0x170/0x950 [ 43.794991] split_vma+0xc6/0x110 [ 43.795441] mprotect_fixup+0x8d2/0xb30 [ 43.795946] do_mprotect_pkey+0x87e/0xd40 [ 43.796470] __x64_sys_mprotect+0x78/0xc0 [ 43.797006] do_syscall_64+0x3f/0x90 [ 43.797483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.798137] [ 43.798355] Freed by task 13: [ 43.798742] kasan_save_stack+0x22/0x50 [ 43.799253] kasan_set_track+0x25/0x30 [ 43.799769] kasan_save_free_info+0x2b/0x50 [ 43.800307] __kasan_slab_free+0x10a/0x190 [ 43.800844] kmem_cache_free+0x10d/0x4d0 [ 43.801355] rcu_core+0x8c8/0x2860 [ 43.801810] __do_softirq+0x1b7/0x7d4 [ 43.802295] [ 43.802509] Last potentially related work creation: [ 43.803109] kasan_save_stack+0x22/0x50 [ 43.803619] __kasan_record_aux_stack+0x8e/0xa0 [ 43.804203] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.804851] remove_vma+0x139/0x170 [ 43.805313] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.805882] do_vmi_munmap+0x1f1/0x2b0 [ 43.806372] __vm_munmap+0x138/0x3a0 [ 43.806845] __x64_sys_munmap+0x59/0x80 [ 43.807356] do_syscall_64+0x3f/0x90 [ 43.807835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.808480] [ 43.808705] The buggy address belongs to the object at ffff88800f1b42b8 [ 43.808705] which belongs to the cache vm_area_struct of size 168 [ 43.810194] The buggy address is located 88 bytes inside of [ 43.810194] freed 168-byte region [ffff88800f1b42b8, ffff88800f1b4360) [ 43.811629] [ 43.811845] The buggy address belongs to the physical page: [ 43.812512] page:000000007d089492 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1b4 [ 43.813612] memcg:ffff888015d5b601 [ 43.814044] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.814693] page_type: 0xffffffff() [ 43.815145] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 43.816072] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015d5b601 [ 43.816984] page dumped because: kasan: bad access detected [ 43.817666] [ 43.817889] Memory state around the buggy address: [ 43.818477] ffff88800f1b4200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 43.819358] ffff88800f1b4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 43.820221] >ffff88800f1b4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 43.821072] ^ [ 43.821542] ffff88800f1b4380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 43.822405] ffff88800f1b4400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 43.823271] ================================================================== [ 43.824255] Disabling lock debugging due to kernel taint [ 45.684611] sshd (224) used greatest stack depth: 24120 bytes left [ 45.685888] BUG: Bad rss-counter state mm:00000000d0592fab type:MM_FILEPAGES val:33 [ 45.687350] BUG: Bad rss-counter state mm:00000000d0592fab type:MM_ANONPAGES val:22 [ 46.171016] BUG: Bad rss-counter state mm:000000006a0324e1 type:MM_FILEPAGES val:33 [ 46.172192] BUG: Bad rss-counter state mm:000000006a0324e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23977' (ECDSA) to the list of known hosts. 2023/06/19 18:59:43 fuzzer started 2023/06/19 18:59:43 dialing manager at localhost:44161 2023/06/19 18:59:43 checking machine... 2023/06/19 18:59:43 checking revisions... [ 46.890306] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:59:43 testing simple program... [ 46.937578] cgroup: Unknown subsys name 'net' [ 46.976136] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:59:38 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=ffff88800b9c0000 RCX=0000000000000100 RDX=000000000001c062 RSI=ffffffff821920cb RDI=0000000000000007 RBP=ffff88800b9c0180 RSP=ffff88806ce09708 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c062 R11=0000000000000000 R12=000000000001c062 R13=ffff88800b9c44c8 R14=0000000000000000 R15=ffff88800b9c0008 RIP=ffffffff821920cf 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 0000000000000000 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=00007f1aa05a4350 CR3=000000000d5be000 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=d7498bf80cdf37a93343b8d0c79b7105 XMM02=eff9b2d0a8fce9cb000000000011d770 XMM03=2c67c8bc2e329bc3000000000011d898 XMM04=746dff92c72d08b500000000000ae988 XMM05=b2588da6a67abf5900000000001354a8 XMM06=993088549562ad030000000000133f28 XMM07=fb795ef6d65770560000000000124660 XMM08=2c67c8bc2e329bc3000000000011d898 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bc1435 RBX=ffffffff85e0a1a8 RCX=ffffffff818d50cc RDX=0000000000000000 RSI=ffffffff8614b878 RDI=ffffffff85e0a19c RBP=ffffffff85e0a19c RSP=ffff88801471f870 R8 =ffffffff8614b878 R9 =ffff88801471f968 R10=0000000000038001 R11=0000000000024372 R12=ffffffff85e0a1b8 R13=ffffffff85e0a19c R14=ffffffff85e0a19c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----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 00007ff5b2916900 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=00007ff5b2ece0b0 CR3=00000000196fc000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000