syzkaller login: [ 32.983976] BUG: Bad rss-counter state mm:00000000a34cc242 type:MM_FILEPAGES val:33 [ 32.985397] BUG: Bad rss-counter state mm:00000000a34cc242 type:MM_ANONPAGES val:22 [ 33.132019] ================================================================== [ 33.132939] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.133899] Read of size 8 at addr ffff8880196a2140 by task sshd/221 [ 33.134754] [ 33.134976] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.135843] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.136850] Call Trace: [ 33.137171] [ 33.137458] dump_stack_lvl+0x91/0xf0 [ 33.137953] print_report+0xcc/0x620 [ 33.138433] ? __virt_addr_valid+0x102/0x340 [ 33.138997] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.139629] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.140251] kasan_report+0xbe/0xf0 [ 33.140732] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.141368] vma_interval_tree_remove+0xc75/0xec0 [ 33.141975] vma_prepare+0xc54/0x11a0 [ 33.142454] __split_vma+0x5af/0x950 [ 33.142927] ? __pfx___split_vma+0x10/0x10 [ 33.143463] ? find_held_lock+0x2c/0x110 [ 33.143997] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.144561] ? lock_is_held_type+0x9f/0x120 [ 33.145097] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.145706] ? mtree_range_walk+0x632/0x900 [ 33.146256] ? mas_walk+0x5c7/0x7c0 [ 33.146738] do_vmi_munmap+0x1f1/0x2b0 [ 33.147250] mmap_region+0x1f9/0x2660 [ 33.147732] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.148242] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.148953] ? __pfx_lock_acquire+0x10/0x10 [ 33.149483] ? __pfx_mmap_region+0x10/0x10 [ 33.150011] ? security_mmap_addr+0x7d/0xa0 [ 33.150538] ? get_unmapped_area+0x1f5/0x3f0 [ 33.151086] do_mmap+0x854/0xf00 [ 33.151538] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.152033] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.152597] ksys_mmap_pgoff+0x3af/0x500 [ 33.153101] do_syscall_64+0x3f/0x90 [ 33.153577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.154223] RIP: 0033:0x7f77b9354d82 [ 33.154679] 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 [ 33.156811] RSP: 002b:00007ffd8e526468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.157725] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f77b9354d82 [ 33.158577] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f77b878e000 [ 33.159452] RBP: 00007f77b878e000 R08: 0000000000000009 R09: 0000000000001000 [ 33.160310] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564ca6a65f70 [ 33.161155] R13: 00007ffd8e526480 R14: 00007ffd8e5264b0 R15: 00007ffd8e526810 [ 33.162015] [ 33.162314] [ 33.162530] Allocated by task 214: [ 33.162967] kasan_save_stack+0x22/0x50 [ 33.163481] kasan_set_track+0x25/0x30 [ 33.163973] __kasan_slab_alloc+0x59/0x70 [ 33.164499] kmem_cache_alloc+0x16b/0x370 [ 33.165021] vm_area_dup+0x20/0x160 [ 33.165474] __split_vma+0x170/0x950 [ 33.165949] split_vma+0xc6/0x110 [ 33.166386] mprotect_fixup+0x8d2/0xb30 [ 33.166888] do_mprotect_pkey+0x87e/0xd40 [ 33.167440] __x64_sys_mprotect+0x78/0xc0 [ 33.167968] do_syscall_64+0x3f/0x90 [ 33.168443] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.169081] [ 33.169297] Freed by task 214: [ 33.169686] kasan_save_stack+0x22/0x50 [ 33.170189] kasan_set_track+0x25/0x30 [ 33.170684] kasan_save_free_info+0x2b/0x50 [ 33.171225] __kasan_slab_free+0x10a/0x190 [ 33.171760] kmem_cache_free+0x10d/0x4d0 [ 33.172275] rcu_core+0x8c8/0x2860 [ 33.172728] __do_softirq+0x1b7/0x7d4 [ 33.173215] [ 33.173429] Last potentially related work creation: [ 33.174025] kasan_save_stack+0x22/0x50 [ 33.174547] __kasan_record_aux_stack+0x8e/0xa0 [ 33.175139] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.175808] remove_vma+0x139/0x170 [ 33.176270] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.176839] do_vmi_munmap+0x1f1/0x2b0 [ 33.177342] __vm_munmap+0x138/0x3a0 [ 33.177821] __x64_sys_munmap+0x59/0x80 [ 33.178325] do_syscall_64+0x3f/0x90 [ 33.178803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.179469] [ 33.179684] The buggy address belongs to the object at ffff8880196a20e8 [ 33.179684] which belongs to the cache vm_area_struct of size 168 [ 33.181192] The buggy address is located 88 bytes inside of [ 33.181192] freed 168-byte region [ffff8880196a20e8, ffff8880196a2190) [ 33.182611] [ 33.182826] The buggy address belongs to the physical page: [ 33.183494] page:000000001bc9b398 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x196a2 [ 33.184589] memcg:ffff88801975ca01 [ 33.185019] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.185664] page_type: 0xffffffff() [ 33.186126] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.187050] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801975ca01 [ 33.187984] page dumped because: kasan: bad access detected [ 33.188651] [ 33.188871] Memory state around the buggy address: [ 33.189454] ffff8880196a2000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.190322] ffff8880196a2080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 33.191200] >ffff8880196a2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.192063] ^ [ 33.192704] ffff8880196a2180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.193567] ffff8880196a2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.194426] ================================================================== [ 33.195597] Disabling lock debugging due to kernel taint [ 35.049685] BUG: Bad rss-counter state mm:000000006209b742 type:MM_FILEPAGES val:33 [ 35.050998] BUG: Bad rss-counter state mm:000000006209b742 type:MM_ANONPAGES val:22 [ 35.540864] BUG: Bad rss-counter state mm:000000008279c9bc type:MM_FILEPAGES val:33 [ 35.542475] BUG: Bad rss-counter state mm:000000008279c9bc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28209' (ECDSA) to the list of known hosts. 2023/06/20 07:53:45 fuzzer started 2023/06/20 07:53:45 dialing manager at localhost:44161 2023/06/20 07:53:45 checking machine... 2023/06/20 07:53:45 checking revisions... [ 36.264469] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:53:45 testing simple program... [ 36.316954] cgroup: Unknown subsys name 'net' [ 36.369139] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:53:43 Registers: info registers vcpu 0 RAX=ffff8880103c1b40 RBX=0000000000000200 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff818060d2 RDI=0000000000000000 RBP=ffff88806ce3de20 RSP=ffff88800d82f7d0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000d000c R12=ffff88800844f780 R13=ffffea00003a5500 R14=ffffea00003dd300 R15=0000000000000001 RIP=ffffffff81806190 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc48c07e900 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=00007fc48b49ebb0 CR3=000000000c628000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b4d37a2e439242c400000000000ae988 XMM05=0c0f8e183b54a68100000000001348c0 XMM06=c291bd5c70af25b900000000001336b0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007fb9bee36618 CR3=000000000c6c6000 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=2034343a33353a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a33353a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000