syzkaller login: [ 40.337312] BUG: Bad rss-counter state mm:000000004467b4c1 type:MM_FILEPAGES val:33 [ 40.338392] BUG: Bad rss-counter state mm:000000004467b4c1 type:MM_ANONPAGES val:22 [ 40.418923] ================================================================== [ 40.419421] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.419930] Read of size 8 at addr ffff888019f02c20 by task sshd/219 [ 40.420339] [ 40.420457] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.420930] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.421451] Call Trace: [ 40.421622] [ 40.421774] dump_stack_lvl+0x91/0xf0 [ 40.422043] print_report+0xcc/0x620 [ 40.422315] ? __virt_addr_valid+0x102/0x340 [ 40.422614] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.422947] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.423276] kasan_report+0xbe/0xf0 [ 40.423531] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.423867] vma_interval_tree_remove+0xc75/0xec0 [ 40.424287] vma_prepare+0xc54/0x11a0 [ 40.424648] __split_vma+0x5af/0x950 [ 40.424906] ? __pfx___split_vma+0x10/0x10 [ 40.425186] ? find_held_lock+0x2c/0x110 [ 40.425465] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.425769] ? lock_is_held_type+0x9f/0x120 [ 40.426063] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.426397] ? mtree_range_walk+0x632/0x900 [ 40.426700] ? mas_walk+0x5c7/0x7c0 [ 40.426957] do_vmi_munmap+0x1f1/0x2b0 [ 40.427220] mmap_region+0x1f9/0x2660 [ 40.427478] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.427753] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.428139] ? __pfx_lock_acquire+0x10/0x10 [ 40.428424] ? __pfx_mmap_region+0x10/0x10 [ 40.428707] ? security_mmap_addr+0x7d/0xa0 [ 40.428993] ? get_unmapped_area+0x1f5/0x3f0 [ 40.429284] do_mmap+0x854/0xf00 [ 40.429520] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.429788] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.430087] ksys_mmap_pgoff+0x3af/0x500 [ 40.430371] do_syscall_64+0x3f/0x90 [ 40.430629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.430976] RIP: 0033:0x7f8495bcdd82 [ 40.431220] 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 [ 40.432350] RSP: 002b:00007ffe7fa63818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.432834] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8495bcdd82 [ 40.433298] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8495007000 [ 40.433749] RBP: 00007f8495007000 R08: 0000000000000009 R09: 0000000000001000 [ 40.434202] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560880458b20 [ 40.434670] R13: 00007ffe7fa63830 R14: 00007ffe7fa63860 R15: 00007ffe7fa63bc0 [ 40.435130] [ 40.435289] [ 40.435406] Allocated by task 212: [ 40.435638] kasan_save_stack+0x22/0x50 [ 40.435915] kasan_set_track+0x25/0x30 [ 40.436186] __kasan_slab_alloc+0x59/0x70 [ 40.436471] kmem_cache_alloc+0x16b/0x370 [ 40.436749] vm_area_dup+0x20/0x160 [ 40.436994] __split_vma+0x170/0x950 [ 40.437244] split_vma+0xc6/0x110 [ 40.437479] mprotect_fixup+0x8d2/0xb30 [ 40.437746] do_mprotect_pkey+0x87e/0xd40 [ 40.438024] __x64_sys_mprotect+0x78/0xc0 [ 40.438307] do_syscall_64+0x3f/0x90 [ 40.438562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.438907] [ 40.439024] Freed by task 19: [ 40.439232] kasan_save_stack+0x22/0x50 [ 40.439504] kasan_set_track+0x25/0x30 [ 40.439773] kasan_save_free_info+0x2b/0x50 [ 40.440061] __kasan_slab_free+0x10a/0x190 [ 40.440356] kmem_cache_free+0x10d/0x4d0 [ 40.440627] rcu_core+0x8c8/0x2860 [ 40.440868] __do_softirq+0x1b7/0x7d4 [ 40.441125] [ 40.441242] Last potentially related work creation: [ 40.441554] kasan_save_stack+0x22/0x50 [ 40.441825] __kasan_record_aux_stack+0x8e/0xa0 [ 40.442133] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.442496] remove_vma+0x139/0x170 [ 40.442742] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.443044] do_vmi_munmap+0x1f1/0x2b0 [ 40.443306] __vm_munmap+0x138/0x3a0 [ 40.443555] __x64_sys_munmap+0x59/0x80 [ 40.443824] do_syscall_64+0x3f/0x90 [ 40.444078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.444422] [ 40.444536] Second to last potentially related work creation: [ 40.444904] kasan_save_stack+0x22/0x50 [ 40.445176] __kasan_record_aux_stack+0x8e/0xa0 [ 40.445491] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.445843] remove_vma+0x139/0x170 [ 40.446088] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.446398] do_vmi_munmap+0x1f1/0x2b0 [ 40.446663] mmap_region+0x1f9/0x2660 [ 40.446923] do_mmap+0x854/0xf00 [ 40.447154] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.447417] ksys_mmap_pgoff+0x3af/0x500 [ 40.447691] do_syscall_64+0x3f/0x90 [ 40.447946] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.448296] [ 40.448415] The buggy address belongs to the object at ffff888019f02bc8 [ 40.448415] which belongs to the cache vm_area_struct of size 168 [ 40.449220] The buggy address is located 88 bytes inside of [ 40.449220] freed 168-byte region [ffff888019f02bc8, ffff888019f02c70) [ 40.449984] [ 40.450101] The buggy address belongs to the physical page: [ 40.450468] page:00000000f93629e3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f02 [ 40.451063] memcg:ffff88800f1f4601 [ 40.451291] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.451639] page_type: 0xffffffff() [ 40.451885] raw: 0100000000000200 ffff88800879fc80 ffffea00003c7c80 dead000000000002 [ 40.452384] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1f4601 [ 40.452873] page dumped because: kasan: bad access detected [ 40.453236] [ 40.453353] Memory state around the buggy address: [ 40.453667] ffff888019f02b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.454130] ffff888019f02b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 40.454602] >ffff888019f02c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 40.455062] ^ [ 40.455356] ffff888019f02c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 40.455818] ffff888019f02d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 40.456279] ================================================================== [ 40.456834] Disabling lock debugging due to kernel taint [ 42.432909] BUG: Bad rss-counter state mm:000000001d448088 type:MM_FILEPAGES val:33 [ 42.434076] BUG: Bad rss-counter state mm:000000001d448088 type:MM_ANONPAGES val:22 [ 42.847830] BUG: Bad rss-counter state mm:00000000877d4529 type:MM_FILEPAGES val:33 [ 42.848923] BUG: Bad rss-counter state mm:00000000877d4529 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26971' (ECDSA) to the list of known hosts. 2023/06/19 22:03:15 fuzzer started 2023/06/19 22:03:15 dialing manager at localhost:44161 2023/06/19 22:03:15 checking machine... 2023/06/19 22:03:15 checking revisions... [ 43.583539] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:03:16 testing simple program... [ 43.625004] cgroup: Unknown subsys name 'net' [ 43.668093] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:03:05 Registers: info registers vcpu 0 RAX=ffffffff813ad6d0 RBX=ffffffff813ad420 RCX=ffff888008d7fa18 RDX=1ffff110011aff3a RSI=ffffffff813ad6d0 RDI=ffff888008d7fa40 RBP=ffff888008d7fa10 RSP=ffff888008d7f970 R8 =0000000000000001 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000003c0d R12=ffff888008d7fa40 R13=0000000000000000 R14=ffff888008d70000 R15=ffff88801a30dd90 RIP=ffffffff84532440 RFL=00000282 [--S----] 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=00007ffdaca5b9e8 CR3=0000000016c8c000 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=2035313a33303a3232203931206e754a XMM01=6964206465766965636552203a5d3832 XMM02=6f63736964203a31313a323035343320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a33303a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001e9c365 RBX=ffff8880097d23f8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800f4e1b28 RBP=ffff88800f4e23a0 RSP=ffff88800da9f888 R8 =0000000000000001 R9 =ffffed1001b53f05 R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800e45c400 R14=ffffffff83677d2f R15=ffff88800ef92480 RIP=ffffffff8184634d 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 00007fa55ec41900 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=00007fa55e073280 CR3=0000000009c72000 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=00000000000000000000000000000000 XMM01=97c6d5a4cb16689c994cf01690ec8978 XMM02=0000000000134530dfcdbad4f1609c37 XMM03=0000000000135ad02467de99a0e07f70 XMM04=b52f9dbf741e7f3e00000000000ae988 XMM05=c9be7ef1ac1f9d320000000000135ad0 XMM06=1319e678c5640f8a0000000000134530 XMM07=806171799158d96700000000001343d8 XMM08=fb795ef6d65770560000000000123640 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000