[ 34.994457] BUG: Bad rss-counter state mm:00000000b774c294 type:MM_FILEPAGES val:33 [ 34.995789] BUG: Bad rss-counter state mm:00000000b774c294 type:MM_ANONPAGES val:22 [ 35.150664] ================================================================== [ 35.151731] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.152875] Read of size 8 at addr ffff88800efb24e0 by task sshd/219 [ 35.154122] [ 35.154364] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.155339] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.156427] Call Trace: [ 35.156786] [ 35.157097] dump_stack_lvl+0x91/0xf0 [ 35.157676] print_report+0xcc/0x620 [ 35.158222] ? __virt_addr_valid+0x102/0x340 [ 35.158861] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.159556] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.160239] kasan_report+0xbe/0xf0 [ 35.160781] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.161488] vma_interval_tree_remove+0xc75/0xec0 [ 35.162144] vma_prepare+0xc54/0x11a0 [ 35.162712] __split_vma+0x5af/0x950 [ 35.163256] ? __pfx___split_vma+0x10/0x10 [ 35.163872] ? find_held_lock+0x2c/0x110 [ 35.164482] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.165121] ? lock_is_held_type+0x9f/0x120 [ 35.165780] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.166506] ? mtree_range_walk+0x632/0x900 [ 35.167140] ? mas_walk+0x5c7/0x7c0 [ 35.167690] do_vmi_munmap+0x1f1/0x2b0 [ 35.168246] mmap_region+0x1f9/0x2660 [ 35.168806] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.169414] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.170221] ? __pfx_lock_acquire+0x10/0x10 [ 35.170863] ? __pfx_mmap_region+0x10/0x10 [ 35.171482] ? security_mmap_addr+0x7d/0xa0 [ 35.172082] ? get_unmapped_area+0x1f5/0x3f0 [ 35.172717] do_mmap+0x854/0xf00 [ 35.173246] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.173827] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.174490] ksys_mmap_pgoff+0x3af/0x500 [ 35.175066] do_syscall_64+0x3f/0x90 [ 35.175623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.176359] RIP: 0033:0x7f5bedf41d82 [ 35.176896] 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 [ 35.179368] RSP: 002b:00007ffdc3a7e298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.180431] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5bedf41d82 [ 35.181421] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5bed37b000 [ 35.182394] RBP: 00007f5bed37b000 R08: 0000000000000009 R09: 0000000000001000 [ 35.183391] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558380623ec0 [ 35.184371] R13: 00007ffdc3a7e2b0 R14: 00007ffdc3a7e2e0 R15: 00007ffdc3a7e640 [ 35.185402] [ 35.185744] [ 35.185986] Allocated by task 211: [ 35.186505] kasan_save_stack+0x22/0x50 [ 35.187072] kasan_set_track+0x25/0x30 [ 35.187657] __kasan_slab_alloc+0x59/0x70 [ 35.188246] kmem_cache_alloc+0x16b/0x370 [ 35.188848] vm_area_dup+0x20/0x160 [ 35.189385] __split_vma+0x170/0x950 [ 35.189926] split_vma+0xc6/0x110 [ 35.190456] mprotect_fixup+0x8d2/0xb30 [ 35.191028] do_mprotect_pkey+0x87e/0xd40 [ 35.191642] __x64_sys_mprotect+0x78/0xc0 [ 35.192233] do_syscall_64+0x3f/0x90 [ 35.192787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.193547] [ 35.193793] Freed by task 211: [ 35.194238] kasan_save_stack+0x22/0x50 [ 35.195037] kasan_set_track+0x25/0x30 [ 35.195630] kasan_save_free_info+0x2b/0x50 [ 35.196238] __kasan_slab_free+0x10a/0x190 [ 35.196867] kmem_cache_free+0x10d/0x4d0 [ 35.197473] rcu_core+0x8c8/0x2860 [ 35.197977] __do_softirq+0x1b7/0x7d4 [ 35.198548] [ 35.198796] Last potentially related work creation: [ 35.199471] kasan_save_stack+0x22/0x50 [ 35.200048] __kasan_record_aux_stack+0x8e/0xa0 [ 35.200719] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.201485] remove_vma+0x139/0x170 [ 35.201998] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.202658] do_vmi_munmap+0x1f1/0x2b0 [ 35.203213] __vm_munmap+0x138/0x3a0 [ 35.203764] __x64_sys_munmap+0x59/0x80 [ 35.204328] do_syscall_64+0x3f/0x90 [ 35.204878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.205654] [ 35.205897] Second to last potentially related work creation: [ 35.206707] kasan_save_stack+0x22/0x50 [ 35.207275] __kasan_record_aux_stack+0x8e/0xa0 [ 35.207945] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.208690] remove_vma+0x139/0x170 [ 35.209211] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.209864] do_vmi_munmap+0x1f1/0x2b0 [ 35.210432] mmap_region+0x1f9/0x2660 [ 35.210986] do_mmap+0x854/0xf00 [ 35.211488] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.212040] ksys_mmap_pgoff+0x3af/0x500 [ 35.212621] do_syscall_64+0x3f/0x90 [ 35.213150] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.213897] [ 35.214135] The buggy address belongs to the object at ffff88800efb2488 [ 35.214135] which belongs to the cache vm_area_struct of size 168 [ 35.215801] The buggy address is located 88 bytes inside of [ 35.215801] freed 168-byte region [ffff88800efb2488, ffff88800efb2530) [ 35.217365] [ 35.217616] The buggy address belongs to the physical page: [ 35.218336] page:0000000048648e02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefb2 [ 35.219566] memcg:ffff888009619e01 [ 35.220038] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.220760] page_type: 0xffffffff() [ 35.221269] raw: 0100000000000200 ffff88800879fc80 ffffea00003a51c0 dead000000000006 [ 35.222322] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009619e01 [ 35.223389] page dumped because: kasan: bad access detected [ 35.224153] [ 35.224410] Memory state around the buggy address: [ 35.225078] ffff88800efb2380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.226100] ffff88800efb2400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 35.227120] >ffff88800efb2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.228090] ^ [ 35.228842] ffff88800efb2500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 35.229733] ffff88800efb2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.230631] ================================================================== [ 35.231664] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 37.218690] BUG: Bad rss-counter state mm:000000001d7b41a7 type:MM_FILEPAGES val:33 [ 37.219740] BUG: Bad rss-counter state mm:000000001d7b41a7 type:MM_ANONPAGES val:22 [ 37.683923] BUG: Bad rss-counter state mm:0000000001109b3a type:MM_FILEPAGES val:33 [ 37.684936] BUG: Bad rss-counter state mm:0000000001109b3a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45081' (ECDSA) to the list of known hosts. 2023/06/19 17:19:19 fuzzer started 2023/06/19 17:19:19 dialing manager at localhost:44161 2023/06/19 17:19:19 checking machine... 2023/06/19 17:19:19 checking revisions... [ 38.443829] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:19:19 testing simple program... [ 38.496961] cgroup: Unknown subsys name 'net' [ 38.555994] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:19:15 Registers: info registers vcpu 0 RAX=1ffffffff0f6f6e8 RBX=0000000000000001 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff8114320f RDI=0000000000000006 RBP=000000000ee9e8d0 RSP=ffff88801031fb90 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000800 R11=0000000000000001 R12=0000000000000000 R13=0000000000000800 R14=ffffffff81893972 R15=ffff88801031fe9e RIP=ffffffff81143228 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 00007f81707e4900 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=00007f8170d99650 CR3=000000000d9bc000 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=00000000ca7be102 RBX=000000006d6ba8ea RCX=ffff888008e57abc RDX=0000000000000007 RSI=000000000000000b RDI=00000000f60834fc RBP=ffffffff813782a8 RSP=ffff888008e57a48 R8 =00000000ed58e5a0 R9 =ffff888008e579b8 R10=0000000000038001 R11=0000000000000128 R12=0000000000000001 R13=0000000000000000 R14=ffff888008e57ab0 R15=0000000000000007 RIP=ffffffff82270eb0 RFL=00000282 [--S----] 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=00007fa7a5bc6000 CR3=00000000095dc000 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=778f847e635ca9a5b9422b1604107c66 XMM02=eff9b2d0a8fce9cb000000000011d408 XMM03=2c67c8bc2e329bc3000000000011d530 XMM04=49cfcc5e7024d56000000000000ae988 XMM05=320f2cd85795f5d50000000000135ec8 XMM06=806171799158d9670000000000134948 XMM07=fb795ef6d65770560000000000123e68 XMM08=2c67c8bc2e329bc3000000000011d530 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000