[ 24.018538] BUG: Bad rss-counter state mm:000000005e8d4154 type:MM_FILEPAGES val:33 [ 24.019731] BUG: Bad rss-counter state mm:000000005e8d4154 type:MM_ANONPAGES val:22 [ 24.166295] ================================================================== [ 24.167185] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.168115] Read of size 8 at addr ffff88800efeaa50 by task sshd/218 [ 24.168986] [ 24.169211] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.170065] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.171049] Call Trace: [ 24.171370] [ 24.171657] dump_stack_lvl+0x91/0xf0 [ 24.172153] print_report+0xcc/0x620 [ 24.172637] ? __virt_addr_valid+0x102/0x340 [ 24.173213] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.173832] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.174446] kasan_report+0xbe/0xf0 [ 24.174923] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.175549] vma_interval_tree_remove+0xc75/0xec0 [ 24.176150] vma_prepare+0xc54/0x11a0 [ 24.176631] __split_vma+0x5af/0x950 [ 24.177106] ? __pfx___split_vma+0x10/0x10 [ 24.177637] ? find_held_lock+0x2c/0x110 [ 24.178146] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.178705] ? lock_is_held_type+0x9f/0x120 [ 24.179246] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.179846] ? mtree_range_walk+0x632/0x900 [ 24.180397] ? mas_walk+0x5c7/0x7c0 [ 24.180869] do_vmi_munmap+0x1f1/0x2b0 [ 24.181369] mmap_region+0x1f9/0x2660 [ 24.181853] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.182376] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.183092] ? __pfx_lock_acquire+0x10/0x10 [ 24.183633] ? __pfx_mmap_region+0x10/0x10 [ 24.184167] ? security_mmap_addr+0x7d/0xa0 [ 24.184697] ? get_unmapped_area+0x1f5/0x3f0 [ 24.185284] do_mmap+0x854/0xf00 [ 24.185730] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.186223] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.186789] ksys_mmap_pgoff+0x3af/0x500 [ 24.187297] do_syscall_64+0x3f/0x90 [ 24.187783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.188434] RIP: 0033:0x7f5d067aed82 [ 24.188895] 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 [ 24.191038] RSP: 002b:00007ffc25581a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.191953] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d067aed82 [ 24.192805] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d05be8000 [ 24.193670] RBP: 00007f5d05be8000 R08: 0000000000000009 R09: 0000000000001000 [ 24.194524] R10: 0000000000000812 R11: 0000000000000206 R12: 00005606becddec0 [ 24.195380] R13: 00007ffc25581a30 R14: 00007ffc25581a60 R15: 00007ffc25581dc0 [ 24.196235] [ 24.196528] [ 24.196745] Allocated by task 211: [ 24.197188] kasan_save_stack+0x22/0x50 [ 24.197695] kasan_set_track+0x25/0x30 [ 24.198193] __kasan_slab_alloc+0x59/0x70 [ 24.198720] kmem_cache_alloc+0x16b/0x370 [ 24.199244] vm_area_dup+0x20/0x160 [ 24.199699] __split_vma+0x170/0x950 [ 24.200164] split_vma+0xc6/0x110 [ 24.200603] mprotect_fixup+0x8d2/0xb30 [ 24.201125] do_mprotect_pkey+0x87e/0xd40 [ 24.201651] __x64_sys_mprotect+0x78/0xc0 [ 24.202172] do_syscall_64+0x3f/0x90 [ 24.202657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.203307] [ 24.203521] Freed by task 211: [ 24.203911] kasan_save_stack+0x22/0x50 [ 24.204419] kasan_set_track+0x25/0x30 [ 24.204916] kasan_save_free_info+0x2b/0x50 [ 24.205462] __kasan_slab_free+0x10a/0x190 [ 24.205994] kmem_cache_free+0x10d/0x4d0 [ 24.206504] rcu_core+0x8c8/0x2860 [ 24.206948] __do_softirq+0x1b7/0x7d4 [ 24.207433] [ 24.207649] Last potentially related work creation: [ 24.208238] kasan_save_stack+0x22/0x50 [ 24.208741] __kasan_record_aux_stack+0x8e/0xa0 [ 24.209333] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.209975] remove_vma+0x139/0x170 [ 24.210427] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.210989] do_vmi_munmap+0x1f1/0x2b0 [ 24.211478] __vm_munmap+0x138/0x3a0 [ 24.211948] __x64_sys_munmap+0x59/0x80 [ 24.212455] do_syscall_64+0x3f/0x90 [ 24.212928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.213578] [ 24.213797] Second to last potentially related work creation: [ 24.214485] kasan_save_stack+0x22/0x50 [ 24.214990] __kasan_record_aux_stack+0x8e/0xa0 [ 24.215574] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.216219] remove_vma+0x139/0x170 [ 24.216675] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.217262] do_vmi_munmap+0x1f1/0x2b0 [ 24.217752] mmap_region+0x1f9/0x2660 [ 24.218230] do_mmap+0x854/0xf00 [ 24.218661] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.219150] ksys_mmap_pgoff+0x3af/0x500 [ 24.219661] do_syscall_64+0x3f/0x90 [ 24.220139] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.220795] [ 24.221016] The buggy address belongs to the object at ffff88800efea9f8 [ 24.221016] which belongs to the cache vm_area_struct of size 168 [ 24.222499] The buggy address is located 88 bytes inside of [ 24.222499] freed 168-byte region [ffff88800efea9f8, ffff88800efeaaa0) [ 24.223895] [ 24.224117] The buggy address belongs to the physical page: [ 24.224775] page:0000000011bbd335 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefea [ 24.225858] memcg:ffff88800d968601 [ 24.226291] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.226938] page_type: 0xffffffff() [ 24.227404] raw: 0100000000000200 ffff8880087a0c80 ffffea000060f7c0 0000000000000002 [ 24.228331] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d968601 [ 24.229255] page dumped because: kasan: bad access detected [ 24.229919] [ 24.230137] Memory state around the buggy address: [ 24.230723] ffff88800efea900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.231591] ffff88800efea980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 24.232453] >ffff88800efeaa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.233311] ^ [ 24.234014] ffff88800efeaa80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 24.234870] ffff88800efeab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.235721] ================================================================== [ 24.236680] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.221996] BUG: Bad rss-counter state mm:00000000dffeaf2f type:MM_FILEPAGES val:33 [ 26.223156] BUG: Bad rss-counter state mm:00000000dffeaf2f type:MM_ANONPAGES val:22 [ 26.620250] BUG: Bad rss-counter state mm:00000000d4977a86 type:MM_FILEPAGES val:33 [ 26.621524] BUG: Bad rss-counter state mm:00000000d4977a86 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28268' (ECDSA) to the list of known hosts. 2023/06/21 04:42:07 fuzzer started 2023/06/21 04:42:08 dialing manager at localhost:36067 2023/06/21 04:42:08 checking machine... 2023/06/21 04:42:08 checking revisions... [ 27.336149] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:42:08 testing simple program... [ 27.383559] cgroup: Unknown subsys name 'net' [ 27.438384] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:42:07 Registers: info registers vcpu 0 RAX=1ffff110018886d1 RBX=ffff88800c443658 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800c443688 RBP=ffff8880143ca2f0 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff8880143e79c0 R14=ffffffff818d9c06 R15=ffff8880144e1100 RIP=ffffffff818464e2 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa7cf6e1900 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=00007fa7cfc96650 CR3=00000000166c0000 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=1ffffffff0a57e9d RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a29d4 RDI=ffffffff852bf4e8 RBP=ffff8880145afd28 RSP=ffff8880145afc60 R8 =0000000000000006 R9 =0000000000000101 R10=000000000000000f R11=0000000000000000 R12=0000000000000015 R13=ffff8880145afd60 R14=0000000000000015 R15=ffffc9000068d118 RIP=ffffffff815a2a0f 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 00007fd64ae9e900 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=00007fd64a2f89b0 CR3=0000000009750000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e9f42e3990de704e00000000000ae988 XMM05=1a9991f54aa497c00000000000132fd0 XMM06=e79b6e8da1ca72c50000000000131a00 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000