Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.577047] BUG: Bad rss-counter state mm:0000000019e39b51 type:MM_FILEPAGES val:33 [ 30.578788] BUG: Bad rss-counter state mm:0000000019e39b51 type:MM_ANONPAGES val:22 [ 30.753222] ================================================================== [ 30.754229] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.755202] Read of size 8 at addr ffff88800e1694e0 by task sshd/218 [ 30.756101] [ 30.756322] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.757212] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.758249] Call Trace: [ 30.758587] [ 30.758876] dump_stack_lvl+0x91/0xf0 [ 30.759377] print_report+0xcc/0x620 [ 30.759867] ? __virt_addr_valid+0x102/0x340 [ 30.760433] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.761087] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.761719] kasan_report+0xbe/0xf0 [ 30.762214] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.762869] vma_interval_tree_remove+0xc75/0xec0 [ 30.763486] vma_prepare+0xc54/0x11a0 [ 30.763985] __split_vma+0x5af/0x950 [ 30.764461] ? __pfx___split_vma+0x10/0x10 [ 30.765006] ? find_held_lock+0x2c/0x110 [ 30.765536] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.766120] ? lock_is_held_type+0x9f/0x120 [ 30.766678] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.767290] ? mtree_range_walk+0x632/0x900 [ 30.767846] ? mas_walk+0x5c7/0x7c0 [ 30.768322] do_vmi_munmap+0x1f1/0x2b0 [ 30.768825] mmap_region+0x1f9/0x2660 [ 30.769306] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.769818] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.770532] ? __pfx_lock_acquire+0x10/0x10 [ 30.771064] ? __pfx_mmap_region+0x10/0x10 [ 30.771596] ? security_mmap_addr+0x7d/0xa0 [ 30.772134] ? get_unmapped_area+0x1f5/0x3f0 [ 30.772688] do_mmap+0x854/0xf00 [ 30.773159] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.773659] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.774228] ksys_mmap_pgoff+0x3af/0x500 [ 30.774738] do_syscall_64+0x3f/0x90 [ 30.775215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.775866] RIP: 0033:0x7fe79afb4d82 [ 30.776322] 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 [ 30.778466] RSP: 002b:00007fff024167f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.779373] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe79afb4d82 [ 30.780234] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe79a3ee000 [ 30.781099] RBP: 00007fe79a3ee000 R08: 0000000000000009 R09: 0000000000001000 [ 30.781953] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ac17ca2ec0 [ 30.782803] R13: 00007fff02416810 R14: 00007fff02416840 R15: 00007fff02416ba0 [ 30.783662] [ 30.783956] [ 30.784174] Allocated by task 211: [ 30.784608] kasan_save_stack+0x22/0x50 [ 30.785134] kasan_set_track+0x25/0x30 [ 30.785625] __kasan_slab_alloc+0x59/0x70 [ 30.786154] kmem_cache_alloc+0x16b/0x370 [ 30.786668] vm_area_dup+0x20/0x160 [ 30.787125] __split_vma+0x170/0x950 [ 30.787586] split_vma+0xc6/0x110 [ 30.788020] mprotect_fixup+0x8d2/0xb30 [ 30.788515] do_mprotect_pkey+0x87e/0xd40 [ 30.789049] __x64_sys_mprotect+0x78/0xc0 [ 30.789566] do_syscall_64+0x3f/0x90 [ 30.790043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.790677] [ 30.790892] Freed by task 211: [ 30.791282] kasan_save_stack+0x22/0x50 [ 30.791779] kasan_set_track+0x25/0x30 [ 30.792270] kasan_save_free_info+0x2b/0x50 [ 30.792825] __kasan_slab_free+0x10a/0x190 [ 30.793358] kmem_cache_free+0x10d/0x4d0 [ 30.793864] rcu_core+0x8c8/0x2860 [ 30.794310] __do_softirq+0x1b7/0x7d4 [ 30.794787] [ 30.795005] Last potentially related work creation: [ 30.795587] kasan_save_stack+0x22/0x50 [ 30.796086] __kasan_record_aux_stack+0x8e/0xa0 [ 30.796653] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.797302] remove_vma+0x139/0x170 [ 30.797752] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.798305] do_vmi_munmap+0x1f1/0x2b0 [ 30.798791] __vm_munmap+0x138/0x3a0 [ 30.799258] __x64_sys_munmap+0x59/0x80 [ 30.799760] do_syscall_64+0x3f/0x90 [ 30.800326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.801126] [ 30.801386] Second to last potentially related work creation: [ 30.802211] kasan_save_stack+0x22/0x50 [ 30.802818] __kasan_record_aux_stack+0x8e/0xa0 [ 30.803513] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.804291] remove_vma+0x139/0x170 [ 30.804842] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.805514] do_vmi_munmap+0x1f1/0x2b0 [ 30.806110] mmap_region+0x1f9/0x2660 [ 30.806689] do_mmap+0x854/0xf00 [ 30.807213] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.807812] ksys_mmap_pgoff+0x3af/0x500 [ 30.808411] do_syscall_64+0x3f/0x90 [ 30.809005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.809788] [ 30.810050] The buggy address belongs to the object at ffff88800e169488 [ 30.810050] which belongs to the cache vm_area_struct of size 168 [ 30.811837] The buggy address is located 88 bytes inside of [ 30.811837] freed 168-byte region [ffff88800e169488, ffff88800e169530) [ 30.813556] [ 30.813815] The buggy address belongs to the physical page: [ 30.814615] page:0000000088e22491 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe169 [ 30.815937] memcg:ffff88800e763801 [ 30.816443] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.817302] page_type: 0xffffffff() [ 30.817845] raw: 0100000000000200 ffff88800879fc80 ffffea0000377f00 dead000000000003 [ 30.818969] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e763801 [ 30.820066] page dumped because: kasan: bad access detected [ 30.820875] [ 30.821131] Memory state around the buggy address: [ 30.821830] ffff88800e169380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.822863] ffff88800e169400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.823891] >ffff88800e169480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.825076] ^ [ 30.826008] ffff88800e169500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.827054] ffff88800e169580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.828090] ================================================================== [ 30.829408] Disabling lock debugging due to kernel taint [ 32.568693] BUG: Bad rss-counter state mm:00000000bc4ff651 type:MM_FILEPAGES val:33 [ 32.569347] BUG: Bad rss-counter state mm:00000000bc4ff651 type:MM_ANONPAGES val:22 [ 33.215043] BUG: Bad rss-counter state mm:000000004f43d98c type:MM_FILEPAGES val:33 [ 33.216261] BUG: Bad rss-counter state mm:000000004f43d98c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9144' (ECDSA) to the list of known hosts. 2023/06/20 03:44:36 fuzzer started 2023/06/20 03:44:36 dialing manager at localhost:44161 2023/06/20 03:44:36 checking machine... 2023/06/20 03:44:36 checking revisions... [ 33.902629] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:44:37 testing simple program... [ 33.945444] cgroup: Unknown subsys name 'net' [ 34.010553] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:44:36 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888015e591d0 RCX=0000000080000000 RDX=1ffffd40000bfa9c RSI=ffffffff81978c6f RDI=ffffea00005fd4e0 RBP=ffffea00005fd4e8 RSP=ffff8880147f7970 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6c88 R12=ffffea00005fd4c0 R13=0000000000000000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff814c07f1 RFL=00000286 [--S--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 00007f2ef937d900 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=00007f2ef87afae0 CR3=000000000d66c000 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=6effd8c0f948ee3100000000000ae988 XMM05=5bb21a4ff029ac2b0000000000137318 XMM06=751b9502027dc0b90000000000135e08 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180f424 RBX=ffffffff85dfcfd8 RCX=ffffffff8180f43a RDX=0000000000000000 RSI=ffffffff86137dcc RDI=ffffffff85dfcfd4 RBP=ffffffff85dfcfd4 RSP=ffff888008e57870 R8 =ffffffff86137dcc R9 =ffff888008e57968 R10=0000000000038001 R11=0000000000020f00 R12=ffffffff85dfcfdc R13=ffffffff85dfcfd4 R14=ffffffff85dfcfd4 R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000202 [-------] 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=00007fffca11b000 CR3=00000000165c2000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000