syzkaller login: [ 53.994086] BUG: Bad rss-counter state mm:0000000074c185cd type:MM_FILEPAGES val:33 [ 53.995622] BUG: Bad rss-counter state mm:0000000074c185cd type:MM_ANONPAGES val:22 [ 54.157965] ================================================================== [ 54.158851] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.159801] Read of size 8 at addr ffff88800fca35c8 by task sshd/225 [ 54.160673] [ 54.160954] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 54.161810] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.162794] Call Trace: [ 54.163216] [ 54.163517] dump_stack_lvl+0x91/0xf0 [ 54.164011] print_report+0xcc/0x620 [ 54.164495] ? __virt_addr_valid+0x102/0x340 [ 54.165043] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.165664] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.166272] kasan_report+0xbe/0xf0 [ 54.166761] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.167449] vma_interval_tree_remove+0xc75/0xec0 [ 54.168096] vma_prepare+0xc54/0x11a0 [ 54.168611] __split_vma+0x5af/0x950 [ 54.169104] ? __pfx___split_vma+0x10/0x10 [ 54.169661] ? find_held_lock+0x2c/0x110 [ 54.170213] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.170817] ? lock_is_held_type+0x9f/0x120 [ 54.171380] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.172024] ? mtree_range_walk+0x632/0x900 [ 54.172610] ? mas_walk+0x5c7/0x7c0 [ 54.173110] do_vmi_munmap+0x1f1/0x2b0 [ 54.173621] mmap_region+0x1f9/0x2660 [ 54.174127] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.174661] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.175417] ? __pfx_lock_acquire+0x10/0x10 [ 54.175980] ? __pfx_mmap_region+0x10/0x10 [ 54.176542] ? security_mmap_addr+0x7d/0xa0 [ 54.177101] ? get_unmapped_area+0x1f5/0x3f0 [ 54.177680] do_mmap+0x854/0xf00 [ 54.178139] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.178663] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.179255] ksys_mmap_pgoff+0x3af/0x500 [ 54.179800] do_syscall_64+0x3f/0x90 [ 54.180299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.180980] RIP: 0033:0x7fc993574d82 [ 54.181462] 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 [ 54.183731] RSP: 002b:00007ffca56ae098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.184677] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc993574d82 [ 54.185574] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc9929ae000 [ 54.186472] RBP: 00007fc9929ae000 R08: 0000000000000009 R09: 0000000000001000 [ 54.187366] R10: 0000000000000812 R11: 0000000000000206 R12: 00005602655eaec0 [ 54.188275] R13: 00007ffca56ae0b0 R14: 00007ffca56ae0e0 R15: 00007ffca56ae440 [ 54.189187] [ 54.189493] [ 54.189720] Allocated by task 218: [ 54.190162] kasan_save_stack+0x22/0x50 [ 54.190696] kasan_set_track+0x25/0x30 [ 54.191223] __kasan_slab_alloc+0x59/0x70 [ 54.191791] kmem_cache_alloc+0x16b/0x370 [ 54.192335] vm_area_dup+0x20/0x160 [ 54.192818] __split_vma+0x170/0x950 [ 54.193310] split_vma+0xc6/0x110 [ 54.193779] mprotect_fixup+0x8d2/0xb30 [ 54.194312] do_mprotect_pkey+0x87e/0xd40 [ 54.194862] __x64_sys_mprotect+0x78/0xc0 [ 54.195431] do_syscall_64+0x3f/0x90 [ 54.195941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.196629] [ 54.196856] Freed by task 218: [ 54.197272] kasan_save_stack+0x22/0x50 [ 54.197801] kasan_set_track+0x25/0x30 [ 54.198319] kasan_save_free_info+0x2b/0x50 [ 54.198879] __kasan_slab_free+0x10a/0x190 [ 54.199462] kmem_cache_free+0x10d/0x4d0 [ 54.199996] rcu_core+0x8c8/0x2860 [ 54.200461] __do_softirq+0x1b7/0x7d4 [ 54.200957] [ 54.201182] Last potentially related work creation: [ 54.201795] kasan_save_stack+0x22/0x50 [ 54.202396] __kasan_record_aux_stack+0x8e/0xa0 [ 54.203000] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.203676] remove_vma+0x139/0x170 [ 54.204142] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.204719] do_vmi_munmap+0x1f1/0x2b0 [ 54.205229] __vm_munmap+0x138/0x3a0 [ 54.205716] __x64_sys_munmap+0x59/0x80 [ 54.206240] do_syscall_64+0x3f/0x90 [ 54.206739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.207408] [ 54.207638] The buggy address belongs to the object at ffff88800fca3570 [ 54.207638] which belongs to the cache vm_area_struct of size 168 [ 54.209175] The buggy address is located 88 bytes inside of [ 54.209175] freed 168-byte region [ffff88800fca3570, ffff88800fca3618) [ 54.210640] [ 54.210868] The buggy address belongs to the physical page: [ 54.211570] page:00000000a234fb99 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfca3 [ 54.212690] memcg:ffff88800fe91601 [ 54.213132] flags: 0x100000000000200(slab|node=0|zone=1) [ 54.213804] page_type: 0xffffffff() [ 54.214271] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 54.215238] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe91601 [ 54.216200] page dumped because: kasan: bad access detected [ 54.216895] [ 54.217121] Memory state around the buggy address: [ 54.217727] ffff88800fca3480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 54.218618] ffff88800fca3500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 54.219533] >ffff88800fca3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.220415] ^ [ 54.221106] ffff88800fca3600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 54.222000] ffff88800fca3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.222880] ================================================================== [ 54.223972] Disabling lock debugging due to kernel taint [ 56.223510] BUG: Bad rss-counter state mm:000000005e41cfac type:MM_FILEPAGES val:33 [ 56.224507] BUG: Bad rss-counter state mm:000000005e41cfac type:MM_ANONPAGES val:22 [ 56.700586] BUG: Bad rss-counter state mm:00000000277951da type:MM_FILEPAGES val:33 [ 56.701573] BUG: Bad rss-counter state mm:00000000277951da type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28659' (ECDSA) to the list of known hosts. 2023/06/20 01:37:12 fuzzer started 2023/06/20 01:37:12 dialing manager at localhost:44161 2023/06/20 01:37:12 checking machine... 2023/06/20 01:37:12 checking revisions... [ 57.423671] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:37:12 testing simple program... [ 57.478779] cgroup: Unknown subsys name 'net' [ 57.524906] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:36:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800f2577a0 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88800f2577f8 RSP=ffff88800f257788 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800f257868 R13=0000000000000000 R14=ffff888019f11b40 R15=ffff888019e2d390 RIP=ffffffff81130399 RFL=00000207 [-----PC] 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 00007f68c6eb8900 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=00007ffc05957000 CR3=000000000e0fe000 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=dffffc0000000000 RBX=ffff88806cf09b60 RCX=ffffffff864bb001 RDX=1ffff1100d9e1384 RSI=ffffffff8450d49f RDI=ffff88806cf09b6c RBP=ffff88806cf09c20 RSP=ffff88806cf09a78 R8 =ffffffff864bb032 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88800fbebec0 RIP=ffffffff813ad4f7 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 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=00007fe12b01a020 CR3=000000000974a000 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=1ba8be20d46d4e926748344b30107683 XMM02=2c67c8bc2e329bc3000000000011d5a8 XMM03=fb795ef6d65770560000000000123f68 XMM04=50654a867cfd6e6600000000000ae988 XMM05=e7a3b750822471340000000000133798 XMM06=3d7271c6f2efcd9c0000000000132970 XMM07=e042d86d42eb936e00000000001241e8 XMM08=37b79e06b868b816000000000011d608 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000