[ 39.317919] ================================================================== [ 39.318768] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.319592] Read of size 8 at addr ffff88800cbb56b0 by task sshd/221 [ 39.320289] [ 39.320474] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.321363] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.322292] Call Trace: [ 39.322572] <TASK> [ 39.322808] dump_stack_lvl+0x91/0xf0 [ 39.323228] print_report+0xcc/0x620 [ 39.323676] ? __virt_addr_valid+0x102/0x340 [ 39.324195] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.324728] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.325225] kasan_report+0xbe/0xf0 [ 39.325627] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.326167] vma_interval_tree_remove+0xc75/0xec0 [ 39.326682] vma_prepare+0xc54/0x11a0 [ 39.327087] __split_vma+0x5af/0x950 [ 39.327491] ? __pfx___split_vma+0x10/0x10 [ 39.327977] ? find_held_lock+0x2c/0x110 [ 39.328419] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.328913] ? lock_is_held_type+0x9f/0x120 [ 39.329381] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.329897] ? mtree_range_walk+0x632/0x900 [ 39.330379] ? mas_walk+0x5c7/0x7c0 [ 39.330803] do_vmi_munmap+0x1f1/0x2b0 [ 39.331244] mmap_region+0x1f9/0x2660 [ 39.331659] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.332192] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.332808] ? __pfx_lock_acquire+0x10/0x10 [ 39.333282] ? __pfx_mmap_region+0x10/0x10 [ 39.333778] ? security_mmap_addr+0x7d/0xa0 [ 39.334230] ? get_unmapped_area+0x1f5/0x3f0 [ 39.334769] do_mmap+0x854/0xf00 [ 39.335168] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.335612] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.336166] ksys_mmap_pgoff+0x3af/0x500 [ 39.336628] do_syscall_64+0x3f/0x90 [ 39.337062] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.337651] RIP: 0033:0x7f1bd22cad82 [ 39.338068] 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 [ 39.340047] RSP: 002b:00007ffc8c935638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.340900] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1bd22cad82 [ 39.341664] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1bd1704000 [ 39.342427] RBP: 00007f1bd1704000 R08: 0000000000000009 R09: 0000000000001000 [ 39.343185] R10: 0000000000000812 R11: 0000000000000206 R12: 00005568a11d8ec0 [ 39.344008] R13: 00007ffc8c935650 R14: 00007ffc8c935680 R15: 00007ffc8c9359e0 [ 39.344774] </TASK> [ 39.345045] [ 39.345234] Allocated by task 213: [ 39.345618] kasan_save_stack+0x22/0x50 [ 39.346081] kasan_set_track+0x25/0x30 [ 39.346525] __kasan_slab_alloc+0x59/0x70 [ 39.347000] kmem_cache_alloc+0x16b/0x370 [ 39.347461] vm_area_dup+0x20/0x160 [ 39.347881] __split_vma+0x170/0x950 [ 39.348350] split_vma+0xc6/0x110 [ 39.348745] mprotect_fixup+0x8d2/0xb30 [ 39.349201] do_mprotect_pkey+0x87e/0xd40 [ 39.349674] __x64_sys_mprotect+0x78/0xc0 [ 39.350135] do_syscall_64+0x3f/0x90 [ 39.350554] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.351135] [ 39.351324] Freed by task 213: [ 39.351678] kasan_save_stack+0x22/0x50 [ 39.352219] kasan_set_track+0x25/0x30 [ 39.352675] kasan_save_free_info+0x2b/0x50 [ 39.353129] __kasan_slab_free+0x10a/0x190 [ 39.353595] kmem_cache_free+0x10d/0x4d0 [ 39.354069] rcu_core+0x8c8/0x2860 [ 39.354452] __do_softirq+0x1b7/0x7d4 [ 39.354869] [ 39.355058] Last potentially related work creation: [ 39.355546] kasan_save_stack+0x22/0x50 [ 39.356017] __kasan_record_aux_stack+0x8e/0xa0 [ 39.356507] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.357014] remove_vma+0x139/0x170 [ 39.357330] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.357712] do_vmi_munmap+0x1f1/0x2b0 [ 39.358030] __vm_munmap+0x138/0x3a0 [ 39.358332] __x64_sys_munmap+0x59/0x80 [ 39.358656] do_syscall_64+0x3f/0x90 [ 39.358966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.359386] [ 39.359527] The buggy address belongs to the object at ffff88800cbb5658 [ 39.359527] which belongs to the cache vm_area_struct of size 168 [ 39.360612] The buggy address is located 88 bytes inside of [ 39.360612] freed 168-byte region [ffff88800cbb5658, ffff88800cbb5700) [ 39.361565] [ 39.361707] The buggy address belongs to the physical page: [ 39.362154] page:00000000bd494605 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbb5 [ 39.363041] memcg:ffff88800d0f3d01 [ 39.363315] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.363837] page_type: 0xffffffff() [ 39.364240] raw: 0100000000000200 ffff8880087a0c80 ffffea000037c8c0 dead000000000003 [ 39.365098] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d0f3d01 [ 39.365937] page dumped because: kasan: bad access detected [ 39.366536] [ 39.366729] Memory state around the buggy address: [ 39.367251] ffff88800cbb5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.367825] ffff88800cbb5600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.368459] >ffff88800cbb5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.369016] ^ [ 39.369403] ffff88800cbb5700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 39.369986] ffff88800cbb5780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 39.370550] ================================================================== [ 39.371228] Disabling lock debugging due to kernel taint [ 41.346819] BUG: Bad rss-counter state mm:0000000031e4484b type:MM_FILEPAGES val:33 [ 41.347765] BUG: Bad rss-counter state mm:0000000031e4484b type:MM_ANONPAGES val:22 [ 41.714229] BUG: Bad rss-counter state mm:00000000665b912f type:MM_FILEPAGES val:33 [ 41.714960] BUG: Bad rss-counter state mm:00000000665b912f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12041' (ECDSA) to the list of known hosts. 2023/06/21 09:43:15 fuzzer started 2023/06/21 09:43:15 dialing manager at localhost:36067 2023/06/21 09:43:15 checking machine... 2023/06/21 09:43:15 checking revisions... [ 42.322159] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:43:15 testing simple program... [ 42.349191] cgroup: Unknown subsys name 'net' [ 42.389948] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:43:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f19a000 RCX=0000000000000000 RDX=1ffffffff0b7d655 RSI=ffffffff83c16fe7 RDI=ffffffff85beb2a8 RBP=ffff88800d9e7da8 RSP=ffff88800d9e7bd0 R8 =0000000000000001 R9 =0000000000000003 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c0860 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 00007fa72ef6c900 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=00007fa72e3ceea0 CR3=000000000c61e000 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=d9a034f65413b0867541bc29f540b4d1 XMM02=000000000011b2d0eff9b2d0a8fce9cb XMM03=000000000011b3a02c67c8bc2e329bc3 XMM04=9269213127547a9a00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131c10 XMM06=900f32dc177d2c160000000000130de8 XMM07=e042d86d42eb936e00000000001223e0 XMM08=8726b18c159715e4000000000011b3a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffffffff85652b60 RCX=0000000080000000 RDX=ffff888019fd3680 RSI=ffffffff814c8467 RDI=ffffffff85652b60 RBP=00007f4cc1f06e07 RSP=ffff888018c07638 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f4cc1f06e07 R13=0000000000000000 R14=ffff888019fd3680 R15=0000000000000000 RIP=ffffffff814c0871 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 00007f4cc1374900 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=00007f4cc133e008 CR3=0000000016930000 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=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