[ 23.981999] BUG: Bad rss-counter state mm:000000006725f629 type:MM_FILEPAGES val:33 [ 23.983065] BUG: Bad rss-counter state mm:000000006725f629 type:MM_ANONPAGES val:22 [ 24.135898] ================================================================== [ 24.137165] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.138328] Read of size 8 at addr ffff88800de13df0 by task sshd/220 [ 24.139164] [ 24.139392] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.140294] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.141335] Call Trace: [ 24.141675] [ 24.141976] dump_stack_lvl+0x91/0xf0 [ 24.142489] print_report+0xcc/0x620 [ 24.142998] ? __virt_addr_valid+0x102/0x340 [ 24.143580] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.144224] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.144878] kasan_report+0xbe/0xf0 [ 24.145376] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.146023] vma_interval_tree_remove+0xc75/0xec0 [ 24.146656] vma_prepare+0xc54/0x11a0 [ 24.147162] __split_vma+0x5af/0x950 [ 24.147655] ? __pfx___split_vma+0x10/0x10 [ 24.148209] ? find_held_lock+0x2c/0x110 [ 24.148747] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.149364] ? lock_is_held_type+0x9f/0x120 [ 24.149927] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.150565] ? mtree_range_walk+0x632/0x900 [ 24.151149] ? mas_walk+0x5c7/0x7c0 [ 24.151647] do_vmi_munmap+0x1f1/0x2b0 [ 24.152162] mmap_region+0x1f9/0x2660 [ 24.152665] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.153208] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.153960] ? __pfx_lock_acquire+0x10/0x10 [ 24.154513] ? __pfx_mmap_region+0x10/0x10 [ 24.155066] ? security_mmap_addr+0x7d/0xa0 [ 24.155619] ? get_unmapped_area+0x1f5/0x3f0 [ 24.156186] do_mmap+0x854/0xf00 [ 24.156643] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.157162] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.157755] ksys_mmap_pgoff+0x3af/0x500 [ 24.158288] do_syscall_64+0x3f/0x90 [ 24.158786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.159477] RIP: 0033:0x7fb4e81a5d82 [ 24.159954] 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 [ 24.162235] RSP: 002b:00007ffdd21ff0b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.163183] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb4e81a5d82 [ 24.164074] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb4e75df000 [ 24.164970] RBP: 00007fb4e75df000 R08: 0000000000000009 R09: 0000000000001000 [ 24.165864] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b5fe6daec0 [ 24.166758] R13: 00007ffdd21ff0d0 R14: 00007ffdd21ff100 R15: 00007ffdd21ff460 [ 24.167645] [ 24.167939] [ 24.168163] Allocated by task 213: [ 24.168611] kasan_save_stack+0x22/0x50 [ 24.169133] kasan_set_track+0x25/0x30 [ 24.169645] __kasan_slab_alloc+0x59/0x70 [ 24.170169] kmem_cache_alloc+0x16b/0x370 [ 24.170699] vm_area_dup+0x20/0x160 [ 24.171166] __split_vma+0x170/0x950 [ 24.171648] split_vma+0xc6/0x110 [ 24.172095] mprotect_fixup+0x8d2/0xb30 [ 24.172610] do_mprotect_pkey+0x87e/0xd40 [ 24.173121] __x64_sys_mprotect+0x78/0xc0 [ 24.173643] do_syscall_64+0x3f/0x90 [ 24.174115] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.174747] [ 24.174961] Freed by task 204: [ 24.175354] kasan_save_stack+0x22/0x50 [ 24.175855] kasan_set_track+0x25/0x30 [ 24.176342] kasan_save_free_info+0x2b/0x50 [ 24.176877] __kasan_slab_free+0x10a/0x190 [ 24.177417] kmem_cache_free+0x10d/0x4d0 [ 24.177912] rcu_core+0x8c8/0x2860 [ 24.178347] __do_softirq+0x1b7/0x7d4 [ 24.178820] [ 24.179031] Last potentially related work creation: [ 24.179595] kasan_save_stack+0x22/0x50 [ 24.180102] __kasan_record_aux_stack+0x8e/0xa0 [ 24.180661] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.181300] remove_vma+0x139/0x170 [ 24.181749] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.182294] do_vmi_munmap+0x1f1/0x2b0 [ 24.182768] __vm_munmap+0x138/0x3a0 [ 24.183228] __x64_sys_munmap+0x59/0x80 [ 24.183727] do_syscall_64+0x3f/0x90 [ 24.184193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.184840] [ 24.185053] Second to last potentially related work creation: [ 24.185720] kasan_save_stack+0x22/0x50 [ 24.186213] __kasan_record_aux_stack+0x8e/0xa0 [ 24.186771] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.187405] remove_vma+0x139/0x170 [ 24.187842] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.188379] do_vmi_munmap+0x1f1/0x2b0 [ 24.188970] mmap_region+0x1f9/0x2660 [ 24.189596] do_mmap+0x854/0xf00 [ 24.190019] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.190492] ksys_mmap_pgoff+0x3af/0x500 [ 24.190977] do_syscall_64+0x3f/0x90 [ 24.191435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.192055] [ 24.192266] The buggy address belongs to the object at ffff88800de13d98 [ 24.192266] which belongs to the cache vm_area_struct of size 168 [ 24.193703] The buggy address is located 88 bytes inside of [ 24.193703] freed 168-byte region [ffff88800de13d98, ffff88800de13e40) [ 24.195063] [ 24.195270] The buggy address belongs to the physical page: [ 24.195909] page:00000000faa21c0d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde13 [ 24.196975] memcg:ffff88800d604401 [ 24.197391] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.198024] page_type: 0xffffffff() [ 24.198456] raw: 0100000000000200 ffff8880087a0c80 ffffea000037f900 dead000000000008 [ 24.199477] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d604401 [ 24.200502] page dumped because: kasan: bad access detected [ 24.201251] [ 24.201493] Memory state around the buggy address: [ 24.202146] ffff88800de13c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 24.203107] ffff88800de13d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 24.204074] >ffff88800de13d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.205038] ^ [ 24.205954] ffff88800de13e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.206913] ffff88800de13e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.207883] ================================================================== [ 24.209219] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.442970] BUG: Bad rss-counter state mm:00000000beb9e455 type:MM_FILEPAGES val:33 [ 26.443983] BUG: Bad rss-counter state mm:00000000beb9e455 type:MM_ANONPAGES val:22 [ 26.954266] BUG: Bad rss-counter state mm:000000007eb4d2b7 type:MM_FILEPAGES val:33 [ 26.955439] BUG: Bad rss-counter state mm:000000007eb4d2b7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6061' (ECDSA) to the list of known hosts. 2023/06/20 16:28:42 fuzzer started 2023/06/20 16:28:42 dialing manager at localhost:36067 2023/06/20 16:28:42 checking machine... 2023/06/20 16:28:42 checking revisions... [ 27.709720] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:28:42 testing simple program... [ 27.759613] cgroup: Unknown subsys name 'net' [ 27.854543] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:28:41 Registers: info registers vcpu 0 RAX=ffff888019eab321 RBX=0000000000000073 RCX=000000000000000e RDX=1ffff110028dceed RSI=ffffffff818d4f93 RDI=ffff8880146e7768 RBP=ffff8880146e7760 RSP=ffff8880146e74d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000040 R11=0000000000000001 R12=0000000000000040 R13=ffff88800c141be8 R14=ffff8880146e7788 R15=ffff8880146e7760 RIP=ffffffff818d4fe0 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 00007f5c447c8900 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=00007f5c43c0ffc0 CR3=000000000c5e4000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=a0d0b883d101968a00000000000ae988 XMM05=50b21b293c216b9d0000000000133980 XMM06=4fda316b135da52b0000000000132400 XMM07=fb795ef6d65770560000000000121608 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=1ffff11003187f66 RCX=ffffffff8366a43e RDX=ffff888015901b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888018c3fb20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00000000ffffffff R14=0000000000000cc0 R15=0000000000000000 RIP=ffffffff814c0261 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 00007f47b8f2f900 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=00007fffff307000 CR3=0000000009720000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000