syzkaller login: [ 39.004371] BUG: Bad rss-counter state mm:000000002141f809 type:MM_FILEPAGES val:33 [ 39.006438] BUG: Bad rss-counter state mm:000000002141f809 type:MM_ANONPAGES val:22 [ 39.172551] ================================================================== [ 39.173550] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.174566] Read of size 8 at addr ffff88800efaac20 by task sshd/218 [ 39.175495] [ 39.175730] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.176666] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.177723] Call Trace: [ 39.178065] [ 39.178382] dump_stack_lvl+0x91/0xf0 [ 39.178903] print_report+0xcc/0x620 [ 39.179471] ? __virt_addr_valid+0x102/0x340 [ 39.180078] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.180760] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.181446] kasan_report+0xbe/0xf0 [ 39.181966] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.182652] vma_interval_tree_remove+0xc75/0xec0 [ 39.183341] vma_prepare+0xc54/0x11a0 [ 39.183856] __split_vma+0x5af/0x950 [ 39.184380] ? __pfx___split_vma+0x10/0x10 [ 39.184947] ? find_held_lock+0x2c/0x110 [ 39.185531] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.186139] ? lock_is_held_type+0x9f/0x120 [ 39.186732] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.187412] ? mtree_range_walk+0x632/0x900 [ 39.188004] ? mas_walk+0x5c7/0x7c0 [ 39.188529] do_vmi_munmap+0x1f1/0x2b0 [ 39.189057] mmap_region+0x1f9/0x2660 [ 39.189610] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.190163] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.190979] ? __pfx_lock_acquire+0x10/0x10 [ 39.191564] ? __pfx_mmap_region+0x10/0x10 [ 39.192127] ? security_mmap_addr+0x7d/0xa0 [ 39.192700] ? get_unmapped_area+0x1f5/0x3f0 [ 39.193293] do_mmap+0x854/0xf00 [ 39.193783] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.194332] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.194945] ksys_mmap_pgoff+0x3af/0x500 [ 39.195523] do_syscall_64+0x3f/0x90 [ 39.196044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.196748] RIP: 0033:0x7fb7b742ad82 [ 39.197241] 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 [ 39.199587] RSP: 002b:00007ffd7953ac58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.200604] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb7b742ad82 [ 39.201570] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb7b6864000 [ 39.202526] RBP: 00007fb7b6864000 R08: 0000000000000009 R09: 0000000000001000 [ 39.203510] R10: 0000000000000812 R11: 0000000000000206 R12: 000055684d384d90 [ 39.204469] R13: 00007ffd7953ac70 R14: 00007ffd7953aca0 R15: 00007ffd7953b000 [ 39.205451] [ 39.205781] [ 39.206021] Allocated by task 211: [ 39.206522] kasan_save_stack+0x22/0x50 [ 39.207094] kasan_set_track+0x25/0x30 [ 39.207656] __kasan_slab_alloc+0x59/0x70 [ 39.208236] kmem_cache_alloc+0x16b/0x370 [ 39.208815] vm_area_dup+0x20/0x160 [ 39.209348] __split_vma+0x170/0x950 [ 39.209878] split_vma+0xc6/0x110 [ 39.210380] mprotect_fixup+0x8d2/0xb30 [ 39.210943] do_mprotect_pkey+0x87e/0xd40 [ 39.211564] __x64_sys_mprotect+0x78/0xc0 [ 39.212145] do_syscall_64+0x3f/0x90 [ 39.212679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.213418] [ 39.213660] Freed by task 211: [ 39.214094] kasan_save_stack+0x22/0x50 [ 39.214689] kasan_set_track+0x25/0x30 [ 39.215249] kasan_save_free_info+0x2b/0x50 [ 39.216030] __kasan_slab_free+0x10a/0x190 [ 39.216731] kmem_cache_free+0x10d/0x4d0 [ 39.217278] rcu_core+0x8c8/0x2860 [ 39.217767] __do_softirq+0x1b7/0x7d4 [ 39.218283] [ 39.218539] Last potentially related work creation: [ 39.219181] kasan_save_stack+0x22/0x50 [ 39.219734] __kasan_record_aux_stack+0x8e/0xa0 [ 39.220368] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.221068] remove_vma+0x139/0x170 [ 39.221567] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.222174] do_vmi_munmap+0x1f1/0x2b0 [ 39.222730] __vm_munmap+0x138/0x3a0 [ 39.223250] __x64_sys_munmap+0x59/0x80 [ 39.223805] do_syscall_64+0x3f/0x90 [ 39.224331] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.225023] [ 39.225258] Second to last potentially related work creation: [ 39.226010] kasan_save_stack+0x22/0x50 [ 39.226575] __kasan_record_aux_stack+0x8e/0xa0 [ 39.227205] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.227908] remove_vma+0x139/0x170 [ 39.228401] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.229002] do_vmi_munmap+0x1f1/0x2b0 [ 39.229534] mmap_region+0x1f9/0x2660 [ 39.230062] do_mmap+0x854/0xf00 [ 39.230551] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.231102] ksys_mmap_pgoff+0x3af/0x500 [ 39.231659] do_syscall_64+0x3f/0x90 [ 39.232173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.232877] [ 39.233111] The buggy address belongs to the object at ffff88800efaabc8 [ 39.233111] which belongs to the cache vm_area_struct of size 168 [ 39.234745] The buggy address is located 88 bytes inside of [ 39.234745] freed 168-byte region [ffff88800efaabc8, ffff88800efaac70) [ 39.236309] [ 39.236544] The buggy address belongs to the physical page: [ 39.237254] page:0000000029af9f6a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefaa [ 39.238451] memcg:ffff88800eac1401 [ 39.238918] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.239693] page_type: 0xffffffff() [ 39.240185] raw: 0100000000000200 ffff88800879fc80 ffffea00003775c0 dead000000000003 [ 39.241189] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eac1401 [ 39.242172] page dumped because: kasan: bad access detected [ 39.242908] [ 39.243164] Memory state around the buggy address: [ 39.243801] ffff88800efaab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.244731] ffff88800efaab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.245658] >ffff88800efaac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.246603] ^ [ 39.247192] ffff88800efaac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.248381] ffff88800efaad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.249588] ================================================================== [ 39.251054] Disabling lock debugging due to kernel taint [ 41.256634] BUG: Bad rss-counter state mm:0000000093fcd855 type:MM_FILEPAGES val:33 [ 41.258063] BUG: Bad rss-counter state mm:0000000093fcd855 type:MM_ANONPAGES val:22 [ 41.707367] BUG: Bad rss-counter state mm:0000000058476eb9 type:MM_FILEPAGES val:33 [ 41.708658] BUG: Bad rss-counter state mm:0000000058476eb9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6286' (ECDSA) to the list of known hosts. 2023/06/19 16:22:56 fuzzer started 2023/06/19 16:22:57 dialing manager at localhost:44161 2023/06/19 16:22:57 checking machine... 2023/06/19 16:22:57 checking revisions... [ 42.415200] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:22:57 testing simple program... [ 42.472693] cgroup: Unknown subsys name 'net' [ 42.552932] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:22:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800d997498 RCX=ffffffff86137501 RDX=1ffff11001b32e9e RSI=0000000000000000 RDI=ffff88800d997498 RBP=ffff88800d9974f0 RSP=ffff88800d997480 R8 =ffffffff86137542 R9 =ffff88800d9974d8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88800d997560 R13=0000000000000000 R14=ffff8880100a51c0 R15=0000000000000cc0 RIP=ffffffff8113038e 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 00007f62713bd900 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=00007fffccb16000 CR3=000000001ca28000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007f94a74f7760 CR3=000000001466e000 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=2036353a32323a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a32323a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000