syzkaller login: [ 33.230526] BUG: Bad rss-counter state mm:000000008655393a type:MM_FILEPAGES val:33 [ 33.232265] BUG: Bad rss-counter state mm:000000008655393a type:MM_ANONPAGES val:22 [ 33.402025] ================================================================== [ 33.402931] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.403860] Read of size 8 at addr ffff88800eb23880 by task sshd/220 [ 33.404625] [ 33.404845] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.405815] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.406777] Call Trace: [ 33.407091] [ 33.407379] dump_stack_lvl+0x91/0xf0 [ 33.407877] print_report+0xcc/0x620 [ 33.408365] ? __virt_addr_valid+0x102/0x340 [ 33.408916] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.409537] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.410178] kasan_report+0xbe/0xf0 [ 33.410654] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.411289] vma_interval_tree_remove+0xc75/0xec0 [ 33.411917] vma_prepare+0xc54/0x11a0 [ 33.412411] __split_vma+0x5af/0x950 [ 33.412906] ? __pfx___split_vma+0x10/0x10 [ 33.413458] ? find_held_lock+0x2c/0x110 [ 33.414008] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.414601] ? lock_is_held_type+0x9f/0x120 [ 33.415164] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.415799] ? mtree_range_walk+0x632/0x900 [ 33.416386] ? mas_walk+0x5c7/0x7c0 [ 33.416883] do_vmi_munmap+0x1f1/0x2b0 [ 33.417399] mmap_region+0x1f9/0x2660 [ 33.417910] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.418445] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.419197] ? __pfx_lock_acquire+0x10/0x10 [ 33.419759] ? __pfx_mmap_region+0x10/0x10 [ 33.420320] ? security_mmap_addr+0x7d/0xa0 [ 33.420883] ? get_unmapped_area+0x1f5/0x3f0 [ 33.421458] do_mmap+0x854/0xf00 [ 33.421929] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.422448] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.423028] ksys_mmap_pgoff+0x3af/0x500 [ 33.423549] do_syscall_64+0x3f/0x90 [ 33.424039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.424697] RIP: 0033:0x7f85dca82d82 [ 33.425167] 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 [ 33.427343] RSP: 002b:00007ffdf753b738 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.428265] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f85dca82d82 [ 33.429136] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85dbebc000 [ 33.430028] RBP: 00007f85dbebc000 R08: 0000000000000009 R09: 0000000000001000 [ 33.430884] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a4d0d1cec0 [ 33.431754] R13: 00007ffdf753b750 R14: 00007ffdf753b780 R15: 00007ffdf753bae0 [ 33.432634] [ 33.432932] [ 33.433150] Allocated by task 213: [ 33.433588] kasan_save_stack+0x22/0x50 [ 33.434115] kasan_set_track+0x25/0x30 [ 33.434620] __kasan_slab_alloc+0x59/0x70 [ 33.435159] kmem_cache_alloc+0x16b/0x370 [ 33.435685] vm_area_dup+0x20/0x160 [ 33.436145] __split_vma+0x170/0x950 [ 33.436614] split_vma+0xc6/0x110 [ 33.437061] mprotect_fixup+0x8d2/0xb30 [ 33.437585] do_mprotect_pkey+0x87e/0xd40 [ 33.438130] __x64_sys_mprotect+0x78/0xc0 [ 33.438666] do_syscall_64+0x3f/0x90 [ 33.439144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.439794] [ 33.440016] Freed by task 213: [ 33.440419] kasan_save_stack+0x22/0x50 [ 33.440945] kasan_set_track+0x25/0x30 [ 33.441450] kasan_save_free_info+0x2b/0x50 [ 33.442008] __kasan_slab_free+0x10a/0x190 [ 33.442557] kmem_cache_free+0x10d/0x4d0 [ 33.443078] rcu_core+0x8c8/0x2860 [ 33.443543] __do_softirq+0x1b7/0x7d4 [ 33.444032] [ 33.444247] Last potentially related work creation: [ 33.444839] kasan_save_stack+0x22/0x50 [ 33.445354] __kasan_record_aux_stack+0x8e/0xa0 [ 33.445955] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.446617] remove_vma+0x139/0x170 [ 33.447087] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.447671] do_vmi_munmap+0x1f1/0x2b0 [ 33.448170] __vm_munmap+0x138/0x3a0 [ 33.448649] __x64_sys_munmap+0x59/0x80 [ 33.449159] do_syscall_64+0x3f/0x90 [ 33.449649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.450322] [ 33.450542] Second to last potentially related work creation: [ 33.451235] kasan_save_stack+0x22/0x50 [ 33.451748] __kasan_record_aux_stack+0x8e/0xa0 [ 33.452346] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.453008] remove_vma+0x139/0x170 [ 33.453476] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.454047] do_vmi_munmap+0x1f1/0x2b0 [ 33.454550] mmap_region+0x1f9/0x2660 [ 33.455048] do_mmap+0x854/0xf00 [ 33.455495] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.456002] ksys_mmap_pgoff+0x3af/0x500 [ 33.456524] do_syscall_64+0x3f/0x90 [ 33.457014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.457678] [ 33.457902] The buggy address belongs to the object at ffff88800eb23828 [ 33.457902] which belongs to the cache vm_area_struct of size 168 [ 33.459409] The buggy address is located 88 bytes inside of [ 33.459409] freed 168-byte region [ffff88800eb23828, ffff88800eb238d0) [ 33.460852] [ 33.461070] The buggy address belongs to the physical page: [ 33.461760] page:00000000525d3bfd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb23 [ 33.462884] memcg:ffff8880102f4901 [ 33.463329] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.463988] page_type: 0xffffffff() [ 33.464458] raw: 0100000000000200 ffff88800879fc80 ffffea0000678040 dead000000000006 [ 33.465408] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880102f4901 [ 33.466345] page dumped because: kasan: bad access detected [ 33.467020] [ 33.467242] Memory state around the buggy address: [ 33.467834] ffff88800eb23780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.468701] ffff88800eb23800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.469584] >ffff88800eb23880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.470476] ^ [ 33.470905] ffff88800eb23900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.471796] ffff88800eb23980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 33.472684] ================================================================== [ 33.473743] Disabling lock debugging due to kernel taint [ 35.057671] BUG: Bad rss-counter state mm:00000000e80b6b76 type:MM_FILEPAGES val:33 [ 35.058859] BUG: Bad rss-counter state mm:00000000e80b6b76 type:MM_ANONPAGES val:22 [ 35.352260] BUG: Bad rss-counter state mm:00000000c2d8943a type:MM_FILEPAGES val:33 [ 35.353508] BUG: Bad rss-counter state mm:00000000c2d8943a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17502' (ECDSA) to the list of known hosts. 2023/06/19 17:24:22 fuzzer started 2023/06/19 17:24:22 dialing manager at localhost:44161 2023/06/19 17:24:22 checking machine... 2023/06/19 17:24:22 checking revisions... [ 36.083264] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:24:23 testing simple program... [ 36.134748] cgroup: Unknown subsys name 'net' [ 36.192680] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:24:20 Registers: info registers vcpu 0 RAX=ffffffff8180c8da RBX=ffffffff813ad420 RCX=ffffffff86137d01 RDX=1ffff110028a0ee6 RSI=ffffffff8180c8da RDI=ffff8880145077a0 RBP=ffff888014507770 RSP=ffff8880145076c8 R8 =ffffffff86137dd6 R9 =ffff888014507718 R10=0000000000038001 R11=0000000000020f00 R12=ffff8880145077a0 R13=0000000000000000 R14=ffff888015821b40 R15=0000000000000000 RIP=ffffffff84532446 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 00007fa43dc43900 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=00007fa43dc0d008 CR3=000000001bec8000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf39500 RCX=0000000000000000 RDX=1ffff1100d9e73fc RSI=0000000000000004 RDI=0000000000000001 RBP=1ffff1100d9e13be RSP=ffff88806cf09dc0 R8 =0000000000000001 R9 =ffffed100d9e13cc R10=0000000000000003 R11=ffff88806cf09ff8 R12=ffff888008d71b78 R13=ffff88806cf39fe0 R14=ffff88806cf39f08 R15=ffff88806cf39500 RIP=ffffffff810a656b RFL=00000086 [--S--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 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=00007f41fcdaa5c0 CR3=000000000d478000 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=2032323a34323a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a34323a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000