[ 24.049166] BUG: Bad rss-counter state mm:000000001f3c59d2 type:MM_FILEPAGES val:33 [ 24.050877] BUG: Bad rss-counter state mm:000000001f3c59d2 type:MM_ANONPAGES val:22 [ 24.231557] ================================================================== [ 24.232533] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.233500] Read of size 8 at addr ffff88800f3624e0 by task sshd/221 [ 24.234293] [ 24.234515] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.235478] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.236498] Call Trace: [ 24.236849] [ 24.237146] dump_stack_lvl+0x91/0xf0 [ 24.237658] print_report+0xcc/0x620 [ 24.238162] ? __virt_addr_valid+0x102/0x340 [ 24.238729] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.239366] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.240001] kasan_report+0xbe/0xf0 [ 24.240526] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.241159] vma_interval_tree_remove+0xc75/0xec0 [ 24.241776] vma_prepare+0xc54/0x11a0 [ 24.242272] __split_vma+0x5af/0x950 [ 24.242767] ? __pfx___split_vma+0x10/0x10 [ 24.243322] ? find_held_lock+0x2c/0x110 [ 24.243854] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.244453] ? lock_is_held_type+0x9f/0x120 [ 24.245011] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.245643] ? mtree_range_walk+0x632/0x900 [ 24.246218] ? mas_walk+0x5c7/0x7c0 [ 24.246708] do_vmi_munmap+0x1f1/0x2b0 [ 24.247221] mmap_region+0x1f9/0x2660 [ 24.247718] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.248263] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.248998] ? __pfx_lock_acquire+0x10/0x10 [ 24.249548] ? __pfx_mmap_region+0x10/0x10 [ 24.250090] ? security_mmap_addr+0x7d/0xa0 [ 24.250646] ? get_unmapped_area+0x1f5/0x3f0 [ 24.251219] do_mmap+0x854/0xf00 [ 24.251667] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.252177] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.252766] ksys_mmap_pgoff+0x3af/0x500 [ 24.253294] do_syscall_64+0x3f/0x90 [ 24.253784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.254450] RIP: 0033:0x7effe4c2ad82 [ 24.254918] 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 [ 24.257135] RSP: 002b:00007fff40c46728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.258058] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007effe4c2ad82 [ 24.258936] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007effe4064000 [ 24.259817] RBP: 00007effe4064000 R08: 0000000000000009 R09: 0000000000001000 [ 24.260705] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d6b210fec0 [ 24.261586] R13: 00007fff40c46740 R14: 00007fff40c46770 R15: 00007fff40c46ad0 [ 24.262468] [ 24.262762] [ 24.262984] Allocated by task 208: [ 24.263426] kasan_save_stack+0x22/0x50 [ 24.263956] kasan_set_track+0x25/0x30 [ 24.264478] __kasan_slab_alloc+0x59/0x70 [ 24.265015] kmem_cache_alloc+0x16b/0x370 [ 24.265556] vm_area_dup+0x20/0x160 [ 24.266020] __split_vma+0x170/0x950 [ 24.266498] split_vma+0xc6/0x110 [ 24.266952] mprotect_fixup+0x8d2/0xb30 [ 24.267463] do_mprotect_pkey+0x87e/0xd40 [ 24.268004] __x64_sys_mprotect+0x78/0xc0 [ 24.268556] do_syscall_64+0x3f/0x90 [ 24.269045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.269709] [ 24.269931] Freed by task 208: [ 24.270334] kasan_save_stack+0x22/0x50 [ 24.270855] kasan_set_track+0x25/0x30 [ 24.271364] kasan_save_free_info+0x2b/0x50 [ 24.271904] __kasan_slab_free+0x10a/0x190 [ 24.272468] kmem_cache_free+0x10d/0x4d0 [ 24.273008] rcu_core+0x8c8/0x2860 [ 24.273479] __do_softirq+0x1b7/0x7d4 [ 24.273967] [ 24.274186] Last potentially related work creation: [ 24.274799] kasan_save_stack+0x22/0x50 [ 24.275334] __kasan_record_aux_stack+0x8e/0xa0 [ 24.275928] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.276629] remove_vma+0x139/0x170 [ 24.277116] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.277703] do_vmi_munmap+0x1f1/0x2b0 [ 24.278226] __vm_munmap+0x138/0x3a0 [ 24.278721] __x64_sys_munmap+0x59/0x80 [ 24.279252] do_syscall_64+0x3f/0x90 [ 24.279760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.280456] [ 24.280682] The buggy address belongs to the object at ffff88800f362488 [ 24.280682] which belongs to the cache vm_area_struct of size 168 [ 24.282248] The buggy address is located 88 bytes inside of [ 24.282248] freed 168-byte region [ffff88800f362488, ffff88800f362530) [ 24.283730] [ 24.283952] The buggy address belongs to the physical page: [ 24.284648] page:000000002533c889 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf362 [ 24.285775] memcg:ffff88800d5ecd01 [ 24.286213] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.286875] page_type: 0xffffffff() [ 24.287348] raw: 0100000000000200 ffff8880087a0c80 ffffea00005995c0 000000000000000c [ 24.288323] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5ecd01 [ 24.289268] page dumped because: kasan: bad access detected [ 24.289960] [ 24.290182] Memory state around the buggy address: [ 24.290793] ffff88800f362380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.291694] ffff88800f362400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.292604] >ffff88800f362480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.293501] ^ [ 24.294288] ffff88800f362500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.295176] ffff88800f362580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.296091] ================================================================== [ 24.297094] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.442993] BUG: Bad rss-counter state mm:000000003a79904b type:MM_FILEPAGES val:33 [ 26.443996] BUG: Bad rss-counter state mm:000000003a79904b type:MM_ANONPAGES val:22 [ 26.896021] BUG: Bad rss-counter state mm:00000000455bc268 type:MM_FILEPAGES val:33 [ 26.897555] BUG: Bad rss-counter state mm:00000000455bc268 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65190' (ECDSA) to the list of known hosts. 2023/06/21 01:50:08 fuzzer started 2023/06/21 01:50:08 dialing manager at localhost:36067 2023/06/21 01:50:08 checking machine... 2023/06/21 01:50:08 checking revisions... [ 27.511463] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:50:08 testing simple program... [ 27.559036] cgroup: Unknown subsys name 'net' [ 27.632161] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:50:08 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888015cbe5c0 RCX=ffffffff81b4d54b RDX=ffff888006a29b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffffea00005c1b40 RSP=ffff88801475fac8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6d53 R12=0000000000000000 R13=0000000000000000 R14=ffff88800febe000 R15=ffff88800febe410 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f991f14f900 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=00007f991e5c7c00 CR3=00000000099d6000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=17d82042bb4a9f3800000000000ae988 XMM05=1267b7ca7f6673230000000000133320 XMM06=dfcdbad4f1609c370000000000131e68 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007f476c775000 RBX=00007ffcc08e5230 RCX=00007ffcc08e5170 RDX=0000000000000014 RSI=000000000000002c RDI=00007f476cf7b060 RBP=00007ffcc08e5360 RSP=fffffe0000049fd0 R8 =000055be94142640 R9 =00007ffcc08e5260 R10=000000000000002c R11=0000000000000246 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff84601260 RFL=00000006 [-----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f476c3d9900 00000000 00000000 GS =0000 0000000000000000 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=00007f476c7753ec CR3=0000000019ea2000 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