syzkaller login: [ 31.247807] BUG: Bad rss-counter state mm:00000000dc03282a type:MM_FILEPAGES val:33 [ 31.249137] BUG: Bad rss-counter state mm:00000000dc03282a type:MM_ANONPAGES val:22 [ 31.403141] ================================================================== [ 31.404181] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.405231] Read of size 8 at addr ffff888016ec0140 by task sshd/221 [ 31.406260] [ 31.406503] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.407507] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.408620] Call Trace: [ 31.408978] [ 31.409296] dump_stack_lvl+0x91/0xf0 [ 31.409842] print_report+0xcc/0x620 [ 31.410378] ? __virt_addr_valid+0x102/0x340 [ 31.411006] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.411699] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.412385] kasan_report+0xbe/0xf0 [ 31.412921] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.413618] vma_interval_tree_remove+0xc75/0xec0 [ 31.414290] vma_prepare+0xc54/0x11a0 [ 31.414836] __split_vma+0x5af/0x950 [ 31.415371] ? __pfx___split_vma+0x10/0x10 [ 31.415970] ? find_held_lock+0x2c/0x110 [ 31.416554] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.417189] ? lock_is_held_type+0x9f/0x120 [ 31.417798] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.418475] ? mtree_range_walk+0x632/0x900 [ 31.419120] ? mas_walk+0x5c7/0x7c0 [ 31.419652] do_vmi_munmap+0x1f1/0x2b0 [ 31.420207] mmap_region+0x1f9/0x2660 [ 31.420749] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.421326] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.422136] ? __pfx_lock_acquire+0x10/0x10 [ 31.422742] ? __pfx_mmap_region+0x10/0x10 [ 31.423355] ? security_mmap_addr+0x7d/0xa0 [ 31.423960] ? get_unmapped_area+0x1f5/0x3f0 [ 31.424571] do_mmap+0x854/0xf00 [ 31.425069] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.425616] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.426254] ksys_mmap_pgoff+0x3af/0x500 [ 31.426845] do_syscall_64+0x3f/0x90 [ 31.427381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.428107] RIP: 0033:0x7f7581aebd82 [ 31.428619] 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 [ 31.431039] RSP: 002b:00007ffde37aa848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.432057] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7581aebd82 [ 31.433023] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7580f25000 [ 31.433978] RBP: 00007f7580f25000 R08: 0000000000000009 R09: 0000000000001000 [ 31.434955] R10: 0000000000000812 R11: 0000000000000206 R12: 000056465cd38ec0 [ 31.435906] R13: 00007ffde37aa860 R14: 00007ffde37aa890 R15: 00007ffde37aabf0 [ 31.436879] [ 31.437194] [ 31.437428] Allocated by task 214: [ 31.437884] kasan_save_stack+0x22/0x50 [ 31.438422] kasan_set_track+0x25/0x30 [ 31.438977] __kasan_slab_alloc+0x59/0x70 [ 31.439533] kmem_cache_alloc+0x16b/0x370 [ 31.440083] vm_area_dup+0x20/0x160 [ 31.440570] __split_vma+0x170/0x950 [ 31.441070] split_vma+0xc6/0x110 [ 31.441539] mprotect_fixup+0x8d2/0xb30 [ 31.442073] do_mprotect_pkey+0x87e/0xd40 [ 31.442635] __x64_sys_mprotect+0x78/0xc0 [ 31.443204] do_syscall_64+0x3f/0x90 [ 31.443719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.444428] [ 31.444661] Freed by task 204: [ 31.445090] kasan_save_stack+0x22/0x50 [ 31.445643] kasan_set_track+0x25/0x30 [ 31.446188] kasan_save_free_info+0x2b/0x50 [ 31.446791] __kasan_slab_free+0x10a/0x190 [ 31.447467] kmem_cache_free+0x10d/0x4d0 [ 31.448023] rcu_core+0x8c8/0x2860 [ 31.448511] __do_softirq+0x1b7/0x7d4 [ 31.449035] [ 31.449270] Last potentially related work creation: [ 31.449915] kasan_save_stack+0x22/0x50 [ 31.450470] __kasan_record_aux_stack+0x8e/0xa0 [ 31.451109] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.451810] remove_vma+0x139/0x170 [ 31.452308] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.452923] do_vmi_munmap+0x1f1/0x2b0 [ 31.453458] __vm_munmap+0x138/0x3a0 [ 31.453979] __x64_sys_munmap+0x59/0x80 [ 31.454524] do_syscall_64+0x3f/0x90 [ 31.455072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.455775] [ 31.456009] The buggy address belongs to the object at ffff888016ec00e8 [ 31.456009] which belongs to the cache vm_area_struct of size 168 [ 31.457616] The buggy address is located 88 bytes inside of [ 31.457616] freed 168-byte region [ffff888016ec00e8, ffff888016ec0190) [ 31.459166] [ 31.459404] The buggy address belongs to the physical page: [ 31.460124] page:000000008d887c4a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ec0 [ 31.461319] memcg:ffff888019620501 [ 31.461787] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.462496] page_type: 0xffffffff() [ 31.463002] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.464014] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019620501 [ 31.465004] page dumped because: kasan: bad access detected [ 31.465727] [ 31.465962] Memory state around the buggy address: [ 31.466592] ffff888016ec0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.467555] ffff888016ec0080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.468497] >ffff888016ec0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.469429] ^ [ 31.470130] ffff888016ec0180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.471079] ffff888016ec0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.472011] ================================================================== [ 31.473041] Disabling lock debugging due to kernel taint [ 33.854470] BUG: Bad rss-counter state mm:00000000ff033da0 type:MM_FILEPAGES val:33 [ 33.855780] BUG: Bad rss-counter state mm:00000000ff033da0 type:MM_ANONPAGES val:22 [ 34.246040] BUG: Bad rss-counter state mm:00000000c35d01b5 type:MM_FILEPAGES val:33 [ 34.247146] BUG: Bad rss-counter state mm:00000000c35d01b5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41475' (ECDSA) to the list of known hosts. 2023/06/19 16:00:36 fuzzer started 2023/06/19 16:00:36 dialing manager at localhost:44161 2023/06/19 16:00:36 checking machine... 2023/06/19 16:00:36 checking revisions... [ 35.064343] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:00:37 testing simple program... [ 35.121918] cgroup: Unknown subsys name 'net' [ 35.168064] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:00:36 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b0c6a RDX=1ffff11003333f24 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801999f930 RSP=ffff88801999f868 R8 =ffffffff863b0c6e R9 =ffff88801999f918 R10=0000000000038001 R11=000000000008a6be R12=ffff88801999f938 R13=ffff88801999f920 R14=0000000000000005 R15=ffff88801999f8d8 RIP=ffffffff81130b54 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 00007f6834702900 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=00007f6834cb7650 CR3=0000000009a68000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007fdc1be1c7a0 CR3=000000000d4e6000 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=4135997ac5572f940e44d68c9a24593f XMM02=ec2efd57dc4c00df000000000011cd00 XMM03=962f6dc4307f0d79000000000011cdd0 XMM04=2493c6a4acc2a04600000000000ae988 XMM05=6baed9e1469b682a0000000000134268 XMM06=c291bd5c70af25b90000000000133c60 XMM07=e042d86d42eb936e0000000000124490 XMM08=962f6dc4307f0d79000000000011cdd0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000