syzkaller login: [ 30.195946] BUG: Bad rss-counter state mm:000000001a5562ac type:MM_FILEPAGES val:33 [ 30.197057] BUG: Bad rss-counter state mm:000000001a5562ac type:MM_ANONPAGES val:22 [ 30.376554] ================================================================== [ 30.377550] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.378571] Read of size 8 at addr ffff88801bc116b0 by task sshd/220 [ 30.379656] [ 30.379971] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.380981] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.382053] Call Trace: [ 30.382399] [ 30.382717] dump_stack_lvl+0x91/0xf0 [ 30.383277] print_report+0xcc/0x620 [ 30.383802] ? __virt_addr_valid+0x102/0x340 [ 30.384410] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.385105] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.385775] kasan_report+0xbe/0xf0 [ 30.386314] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.386992] vma_interval_tree_remove+0xc75/0xec0 [ 30.387649] vma_prepare+0xc54/0x11a0 [ 30.388182] __split_vma+0x5af/0x950 [ 30.388688] ? __pfx___split_vma+0x10/0x10 [ 30.389281] ? find_held_lock+0x2c/0x110 [ 30.389856] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.390482] ? lock_is_held_type+0x9f/0x120 [ 30.391070] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.391850] ? mtree_range_walk+0x632/0x900 [ 30.392531] ? mas_walk+0x5c7/0x7c0 [ 30.393115] do_vmi_munmap+0x1f1/0x2b0 [ 30.393708] mmap_region+0x1f9/0x2660 [ 30.394280] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.394884] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.395753] ? __pfx_lock_acquire+0x10/0x10 [ 30.396394] ? __pfx_mmap_region+0x10/0x10 [ 30.397044] ? security_mmap_addr+0x7d/0xa0 [ 30.397676] ? get_unmapped_area+0x1f5/0x3f0 [ 30.398327] do_mmap+0x854/0xf00 [ 30.398846] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.399469] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.400151] ksys_mmap_pgoff+0x3af/0x500 [ 30.400759] do_syscall_64+0x3f/0x90 [ 30.401338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.402119] RIP: 0033:0x7f3364e8fd82 [ 30.402665] 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 [ 30.405030] RSP: 002b:00007ffcb64cc618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.406031] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3364e8fd82 [ 30.406953] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f33642c9000 [ 30.407897] RBP: 00007f33642c9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.408803] R10: 0000000000000812 R11: 0000000000000206 R12: 00005648f934f980 [ 30.409712] R13: 00007ffcb64cc630 R14: 00007ffcb64cc660 R15: 00007ffcb64cc9c0 [ 30.410634] [ 30.410949] [ 30.411184] Allocated by task 213: [ 30.411654] kasan_save_stack+0x22/0x50 [ 30.412200] kasan_set_track+0x25/0x30 [ 30.412725] __kasan_slab_alloc+0x59/0x70 [ 30.413283] kmem_cache_alloc+0x16b/0x370 [ 30.413829] vm_area_dup+0x20/0x160 [ 30.414317] __split_vma+0x170/0x950 [ 30.414830] split_vma+0xc6/0x110 [ 30.415332] mprotect_fixup+0x8d2/0xb30 [ 30.415890] do_mprotect_pkey+0x87e/0xd40 [ 30.416471] __x64_sys_mprotect+0x78/0xc0 [ 30.417050] do_syscall_64+0x3f/0x90 [ 30.417579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.418295] [ 30.418533] Freed by task 213: [ 30.418967] kasan_save_stack+0x22/0x50 [ 30.419531] kasan_set_track+0x25/0x30 [ 30.420079] kasan_save_free_info+0x2b/0x50 [ 30.420750] __kasan_slab_free+0x10a/0x190 [ 30.421342] kmem_cache_free+0x10d/0x4d0 [ 30.421910] rcu_core+0x8c8/0x2860 [ 30.422395] __do_softirq+0x1b7/0x7d4 [ 30.422925] [ 30.423174] Last potentially related work creation: [ 30.423824] kasan_save_stack+0x22/0x50 [ 30.424383] __kasan_record_aux_stack+0x8e/0xa0 [ 30.425020] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.425736] remove_vma+0x139/0x170 [ 30.426240] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.426845] do_vmi_munmap+0x1f1/0x2b0 [ 30.427397] __vm_munmap+0x138/0x3a0 [ 30.427898] __x64_sys_munmap+0x59/0x80 [ 30.428430] do_syscall_64+0x3f/0x90 [ 30.428937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.429628] [ 30.429859] The buggy address belongs to the object at ffff88801bc11658 [ 30.429859] which belongs to the cache vm_area_struct of size 168 [ 30.431507] The buggy address is located 88 bytes inside of [ 30.431507] freed 168-byte region [ffff88801bc11658, ffff88801bc11700) [ 30.433061] [ 30.433301] The buggy address belongs to the physical page: [ 30.434012] page:000000009df3d0d4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc11 [ 30.435202] memcg:ffff888016c4b101 [ 30.435669] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.436387] page_type: 0xffffffff() [ 30.436893] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.437922] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c4b101 [ 30.438945] page dumped because: kasan: bad access detected [ 30.439689] [ 30.439932] Memory state around the buggy address: [ 30.440580] ffff88801bc11580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.441535] ffff88801bc11600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.442489] >ffff88801bc11680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.443442] ^ [ 30.444093] ffff88801bc11700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.445046] ffff88801bc11780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.445997] ================================================================== [ 30.447033] Disabling lock debugging due to kernel taint [ 32.950886] BUG: Bad rss-counter state mm:0000000044e156a2 type:MM_FILEPAGES val:33 [ 32.952116] BUG: Bad rss-counter state mm:0000000044e156a2 type:MM_ANONPAGES val:22 [ 33.535961] BUG: Bad rss-counter state mm:000000002ab0b065 type:MM_FILEPAGES val:33 [ 33.537153] BUG: Bad rss-counter state mm:000000002ab0b065 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39040' (ECDSA) to the list of known hosts. 2023/06/19 14:42:07 fuzzer started 2023/06/19 14:42:07 dialing manager at localhost:44161 2023/06/19 14:42:07 checking machine... 2023/06/19 14:42:07 checking revisions... [ 34.164289] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:42:07 testing simple program... [ 34.205101] cgroup: Unknown subsys name 'net' [ 34.267949] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:42:07 Registers: info registers vcpu 0 RAX=00007f21563f3560 RBX=000055878d6f0b6a RCX=0000000000000068 RDX=0000000000000cc0 RSI=0000000000000069 RDI=00007ffce0dcc5a0 RBP=0000000000000d68 RSP=00007ffce0dcbfe8 R8 =00000000ffffffff R9 =000000000000001b R10=000055878d6f0b20 R11=0000000000000000 R12=00007f21563f28a0 R13=00007ffce0dcc5a0 R14=000000000000001f R15=000055878d6f0b69 RIP=00007f21562b71c0 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2155e3f900 00000000 00000000 GS =0000 0000000000000000 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=00007f21563f70b0 CR3=000000000eef8000 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=5f6d61702c78756e696c65735f6d6170 XMM01=2c74696d7265705f6d61702c74696e69 XMM02=2c78696e755f6d61702c74696d726570 XMM03=2c6469756e69676f6c5f6d61702c7875 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2029286e65706f5f7469647561007325 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=ffff888008c58400 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=00007fc7b8746758 CR3=0000000010220000 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=9ff4393f6dfc61b6d74cbde96d5ee7cf XMM02=ec2efd57dc4c00df000000000011cef8 XMM03=78dd258ec4e20289000000000011cfc8 XMM04=bbb802aa03cd6d5100000000000ae988 XMM05=19e9129bd510f2350000000000134038 XMM06=3b74801a16b675280000000000132ea0 XMM07=e042d86d42eb936e0000000000124458 XMM08=78dd258ec4e20289000000000011cfc8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000