Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 37.143312] BUG: Bad rss-counter state mm:00000000bd06f61d type:MM_FILEPAGES val:33 [ 37.144558] BUG: Bad rss-counter state mm:00000000bd06f61d type:MM_ANONPAGES val:22 [ 37.323647] ================================================================== [ 37.324699] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.325808] Read of size 8 at addr ffff88800dc744e0 by task sshd/218 [ 37.326963] [ 37.327209] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.328198] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.329315] Call Trace: [ 37.329684] [ 37.329996] dump_stack_lvl+0x91/0xf0 [ 37.330552] print_report+0xcc/0x620 [ 37.331086] ? __virt_addr_valid+0x102/0x340 [ 37.331735] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.332431] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.333132] kasan_report+0xbe/0xf0 [ 37.333686] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.334383] vma_interval_tree_remove+0xc75/0xec0 [ 37.335069] vma_prepare+0xc54/0x11a0 [ 37.335636] __split_vma+0x5af/0x950 [ 37.336168] ? __pfx___split_vma+0x10/0x10 [ 37.336798] ? find_held_lock+0x2c/0x110 [ 37.337389] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.338035] ? lock_is_held_type+0x9f/0x120 [ 37.338649] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.339328] ? mtree_range_walk+0x632/0x900 [ 37.339968] ? mas_walk+0x5c7/0x7c0 [ 37.340526] do_vmi_munmap+0x1f1/0x2b0 [ 37.341083] mmap_region+0x1f9/0x2660 [ 37.341637] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.342212] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.343019] ? __pfx_lock_acquire+0x10/0x10 [ 37.343643] ? __pfx_mmap_region+0x10/0x10 [ 37.344236] ? security_mmap_addr+0x7d/0xa0 [ 37.344862] ? get_unmapped_area+0x1f5/0x3f0 [ 37.345472] do_mmap+0x854/0xf00 [ 37.345983] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.346542] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.347181] ksys_mmap_pgoff+0x3af/0x500 [ 37.347781] do_syscall_64+0x3f/0x90 [ 37.348339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.349076] RIP: 0033:0x7f85b5538d82 [ 37.349605] 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 [ 37.351972] RSP: 002b:00007ffda5f7f198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.353029] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f85b5538d82 [ 37.353989] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85b4972000 [ 37.354955] RBP: 00007f85b4972000 R08: 0000000000000009 R09: 0000000000001000 [ 37.355905] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564f664b7980 [ 37.356866] R13: 00007ffda5f7f1b0 R14: 00007ffda5f7f1e0 R15: 00007ffda5f7f540 [ 37.357808] [ 37.358123] [ 37.358358] Allocated by task 211: [ 37.358842] kasan_save_stack+0x22/0x50 [ 37.359388] kasan_set_track+0x25/0x30 [ 37.359957] __kasan_slab_alloc+0x59/0x70 [ 37.360573] kmem_cache_alloc+0x16b/0x370 [ 37.361141] vm_area_dup+0x20/0x160 [ 37.361648] __split_vma+0x170/0x950 [ 37.362163] split_vma+0xc6/0x110 [ 37.362669] mprotect_fixup+0x8d2/0xb30 [ 37.363228] do_mprotect_pkey+0x87e/0xd40 [ 37.363828] __x64_sys_mprotect+0x78/0xc0 [ 37.364409] do_syscall_64+0x3f/0x90 [ 37.364938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.365657] [ 37.365904] Freed by task 211: [ 37.366338] kasan_save_stack+0x22/0x50 [ 37.367083] kasan_set_track+0x25/0x30 [ 37.367669] kasan_save_free_info+0x2b/0x50 [ 37.368246] __kasan_slab_free+0x10a/0x190 [ 37.368869] kmem_cache_free+0x10d/0x4d0 [ 37.369423] rcu_core+0x8c8/0x2860 [ 37.369940] __do_softirq+0x1b7/0x7d4 [ 37.370470] [ 37.370729] Last potentially related work creation: [ 37.371386] kasan_save_stack+0x22/0x50 [ 37.371985] __kasan_record_aux_stack+0x8e/0xa0 [ 37.372684] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.373414] remove_vma+0x139/0x170 [ 37.373942] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.374592] do_vmi_munmap+0x1f1/0x2b0 [ 37.375139] __vm_munmap+0x138/0x3a0 [ 37.375707] __x64_sys_munmap+0x59/0x80 [ 37.376270] do_syscall_64+0x3f/0x90 [ 37.376841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.377576] [ 37.377823] Second to last potentially related work creation: [ 37.378613] kasan_save_stack+0x22/0x50 [ 37.379178] __kasan_record_aux_stack+0x8e/0xa0 [ 37.379853] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.380610] remove_vma+0x139/0x170 [ 37.381119] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.381760] do_vmi_munmap+0x1f1/0x2b0 [ 37.382304] mmap_region+0x1f9/0x2660 [ 37.382860] do_mmap+0x854/0xf00 [ 37.383348] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.383928] ksys_mmap_pgoff+0x3af/0x500 [ 37.384538] do_syscall_64+0x3f/0x90 [ 37.385086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.385837] [ 37.386087] The buggy address belongs to the object at ffff88800dc74488 [ 37.386087] which belongs to the cache vm_area_struct of size 168 [ 37.387803] The buggy address is located 88 bytes inside of [ 37.387803] freed 168-byte region [ffff88800dc74488, ffff88800dc74530) [ 37.389414] [ 37.389674] The buggy address belongs to the physical page: [ 37.390414] page:00000000a949bde2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc74 [ 37.391679] memcg:ffff888009a0eb01 [ 37.392155] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.392900] page_type: 0xffffffff() [ 37.393397] raw: 0100000000000200 ffff88800879fc80 ffffea000035e180 dead000000000002 [ 37.394431] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a0eb01 [ 37.395443] page dumped because: kasan: bad access detected [ 37.396279] [ 37.396571] Memory state around the buggy address: [ 37.397261] ffff88800dc74380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.398297] ffff88800dc74400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 37.399323] >ffff88800dc74480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.400373] ^ [ 37.401286] ffff88800dc74500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 37.402321] ffff88800dc74580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.403324] ================================================================== [ 37.404591] Disabling lock debugging due to kernel taint [ 39.222075] BUG: Bad rss-counter state mm:00000000c020143a type:MM_FILEPAGES val:33 [ 39.222913] BUG: Bad rss-counter state mm:00000000c020143a type:MM_ANONPAGES val:22 [ 39.575174] BUG: Bad rss-counter state mm:000000001d74d47a type:MM_FILEPAGES val:33 [ 39.575943] BUG: Bad rss-counter state mm:000000001d74d47a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47882' (ECDSA) to the list of known hosts. 2023/06/19 19:01:01 fuzzer started 2023/06/19 19:01:01 dialing manager at localhost:44161 2023/06/19 19:01:01 checking machine... 2023/06/19 19:01:01 checking revisions... [ 40.308571] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:01:01 testing simple program... [ 40.353123] cgroup: Unknown subsys name 'net' [ 40.426241] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:00:54 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880087e5800 RCX=0000000000000000 RDX=1ffff110010fcb27 RSI=ffffffff83c59007 RDI=ffff8880087e5938 RBP=ffff888016c70ec0 RSP=ffff88800fb7f4a8 R8 =0000000000000004 R9 =0000000000000000 R10=ffff888016c70ed8 R11=00000000000b6996 R12=ffff88801bee8140 R13=ffff88800f9a2000 R14=ffff88800fb7f728 R15=000000006490a5ec RIP=ffffffff83c59030 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 00007f671f2f7900 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=00007f671f8ae618 CR3=000000000e61c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fe0f7111b40 CR3=000000000ed22000 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=c4167d6f484009947f4e8e54dece3bf7 XMM02=ec2efd57dc4c00df000000000011d200 XMM03=1f7a506ca244847d000000000011d2d0 XMM04=af46db443256b83100000000000ae988 XMM05=751b9502027dc0b90000000000134b68 XMM06=fd4df4d3716d61be0000000000133d40 XMM07=e042d86d42eb936e0000000000124260 XMM08=1f7a506ca244847d000000000011d2d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000