syzkaller login: [ 51.092932] BUG: Bad rss-counter state mm:000000001cd8c94f type:MM_FILEPAGES val:33 [ 51.094190] BUG: Bad rss-counter state mm:000000001cd8c94f type:MM_ANONPAGES val:22 [ 51.261203] ================================================================== [ 51.262103] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.263047] Read of size 8 at addr ffff8880181066b0 by task sshd/219 [ 51.263916] [ 51.264132] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.265024] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.266054] Call Trace: [ 51.266389] [ 51.266685] dump_stack_lvl+0x91/0xf0 [ 51.267207] print_report+0xcc/0x620 [ 51.267722] ? __virt_addr_valid+0x102/0x340 [ 51.268285] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.268904] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.269512] kasan_report+0xbe/0xf0 [ 51.269994] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.270622] vma_interval_tree_remove+0xc75/0xec0 [ 51.271225] vma_prepare+0xc54/0x11a0 [ 51.271709] __split_vma+0x5af/0x950 [ 51.272181] ? __pfx___split_vma+0x10/0x10 [ 51.272735] ? find_held_lock+0x2c/0x110 [ 51.273260] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.273823] ? lock_is_held_type+0x9f/0x120 [ 51.274356] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.274970] ? mtree_range_walk+0x632/0x900 [ 51.275518] ? mas_walk+0x5c7/0x7c0 [ 51.275988] do_vmi_munmap+0x1f1/0x2b0 [ 51.276488] mmap_region+0x1f9/0x2660 [ 51.276974] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.277480] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.278187] ? __pfx_lock_acquire+0x10/0x10 [ 51.278714] ? __pfx_mmap_region+0x10/0x10 [ 51.279239] ? security_mmap_addr+0x7d/0xa0 [ 51.279771] ? get_unmapped_area+0x1f5/0x3f0 [ 51.280331] do_mmap+0x854/0xf00 [ 51.280766] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.281256] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.281816] ksys_mmap_pgoff+0x3af/0x500 [ 51.282321] do_syscall_64+0x3f/0x90 [ 51.282798] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.283442] RIP: 0033:0x7f0095f64d82 [ 51.283902] 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 [ 51.286119] RSP: 002b:00007fffe38bcd88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.287016] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0095f64d82 [ 51.287863] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f009539e000 [ 51.288722] RBP: 00007f009539e000 R08: 0000000000000009 R09: 0000000000001000 [ 51.289570] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bce56b2ec0 [ 51.290413] R13: 00007fffe38bcda0 R14: 00007fffe38bcdd0 R15: 00007fffe38bd130 [ 51.291275] [ 51.291565] [ 51.291779] Allocated by task 212: [ 51.292204] kasan_save_stack+0x22/0x50 [ 51.292732] kasan_set_track+0x25/0x30 [ 51.293228] __kasan_slab_alloc+0x59/0x70 [ 51.293748] kmem_cache_alloc+0x16b/0x370 [ 51.294267] vm_area_dup+0x20/0x160 [ 51.294719] __split_vma+0x170/0x950 [ 51.295185] split_vma+0xc6/0x110 [ 51.295620] mprotect_fixup+0x8d2/0xb30 [ 51.296123] do_mprotect_pkey+0x87e/0xd40 [ 51.296651] __x64_sys_mprotect+0x78/0xc0 [ 51.297167] do_syscall_64+0x3f/0x90 [ 51.297640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.298278] [ 51.298492] Freed by task 212: [ 51.298883] kasan_save_stack+0x22/0x50 [ 51.299384] kasan_set_track+0x25/0x30 [ 51.299882] kasan_save_free_info+0x2b/0x50 [ 51.300420] __kasan_slab_free+0x10a/0x190 [ 51.300951] kmem_cache_free+0x10d/0x4d0 [ 51.301453] rcu_core+0x8c8/0x2860 [ 51.301899] __do_softirq+0x1b7/0x7d4 [ 51.302375] [ 51.302598] Last potentially related work creation: [ 51.303182] kasan_save_stack+0x22/0x50 [ 51.303679] __kasan_record_aux_stack+0x8e/0xa0 [ 51.304270] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.304903] remove_vma+0x139/0x170 [ 51.305359] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.305914] do_vmi_munmap+0x1f1/0x2b0 [ 51.306399] __vm_munmap+0x138/0x3a0 [ 51.306865] __x64_sys_munmap+0x59/0x80 [ 51.307361] do_syscall_64+0x3f/0x90 [ 51.307831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.308494] [ 51.308705] The buggy address belongs to the object at ffff888018106658 [ 51.308705] which belongs to the cache vm_area_struct of size 168 [ 51.310191] The buggy address is located 88 bytes inside of [ 51.310191] freed 168-byte region [ffff888018106658, ffff888018106700) [ 51.311610] [ 51.311826] The buggy address belongs to the physical page: [ 51.312504] page:00000000bf2c210b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18106 [ 51.313599] memcg:ffff8880158f8601 [ 51.314025] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.314667] page_type: 0xffffffff() [ 51.315119] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 51.316029] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880158f8601 [ 51.316942] page dumped because: kasan: bad access detected [ 51.317604] [ 51.317818] Memory state around the buggy address: [ 51.318393] ffff888018106580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 51.319245] ffff888018106600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 51.320108] >ffff888018106680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.320969] ^ [ 51.321547] ffff888018106700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 51.322407] ffff888018106780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 51.323264] ================================================================== [ 51.324313] Disabling lock debugging due to kernel taint [ 53.107880] BUG: Bad rss-counter state mm:000000009962e220 type:MM_FILEPAGES val:33 [ 53.109171] BUG: Bad rss-counter state mm:000000009962e220 type:MM_ANONPAGES val:22 [ 53.616777] BUG: Bad rss-counter state mm:00000000226bce43 type:MM_FILEPAGES val:33 [ 53.618061] BUG: Bad rss-counter state mm:00000000226bce43 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15849' (ECDSA) to the list of known hosts. 2023/06/20 02:16:52 fuzzer started 2023/06/20 02:16:52 dialing manager at localhost:44161 2023/06/20 02:16:52 checking machine... 2023/06/20 02:16:52 checking revisions... [ 54.258814] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:16:52 testing simple program... [ 54.302222] cgroup: Unknown subsys name 'net' [ 54.351497] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:16:31 Registers: info registers vcpu 0 RAX=000000008d8d5b30 RBX=ffff88808d8d5b30 RCX=0000000000000000 RDX=dffffc0000000000 RSI=000000000d8d5b30 RDI=ffff88808d8d5b30 RBP=000000000d8d5b30 RSP=ffff88800e23f6f8 R8 =0000000000000006 R9 =ffff88800d8d5b30 R10=ffff88808d8d5b30 R11=00000000000b6996 R12=0000000000000000 R13=ffffea00003f3840 R14=ffffffff8366dfdf R15=0000000000000000 RIP=ffffffff814c02f0 RFL=00000246 [---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 00007fdec5081900 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=00007fdec5638618 CR3=000000001469a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f733675e1b0 CR3=000000000fcfe000 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=2031353a36313a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a36313a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000