Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.862395] BUG: Bad rss-counter state mm:0000000052aafc1c type:MM_FILEPAGES val:33 [ 30.863748] BUG: Bad rss-counter state mm:0000000052aafc1c type:MM_ANONPAGES val:22 [ 31.027089] ================================================================== [ 31.028176] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.029316] Read of size 8 at addr ffff888019ee26b0 by task sshd/218 [ 31.030379] [ 31.030647] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.031726] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.032975] Call Trace: [ 31.033371] [ 31.033698] dump_stack_lvl+0x91/0xf0 [ 31.034206] print_report+0xcc/0x620 [ 31.034703] ? __virt_addr_valid+0x102/0x340 [ 31.035309] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.035959] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.036593] kasan_report+0xbe/0xf0 [ 31.037109] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.037732] vma_interval_tree_remove+0xc75/0xec0 [ 31.038369] vma_prepare+0xc54/0x11a0 [ 31.038874] __split_vma+0x5af/0x950 [ 31.039398] ? __pfx___split_vma+0x10/0x10 [ 31.039958] ? find_held_lock+0x2c/0x110 [ 31.040496] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.041096] ? lock_is_held_type+0x9f/0x120 [ 31.041654] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.042330] ? mtree_range_walk+0x632/0x900 [ 31.042923] ? mas_walk+0x5c7/0x7c0 [ 31.043430] do_vmi_munmap+0x1f1/0x2b0 [ 31.043947] mmap_region+0x1f9/0x2660 [ 31.044440] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.044992] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.045716] ? __pfx_lock_acquire+0x10/0x10 [ 31.046274] ? __pfx_mmap_region+0x10/0x10 [ 31.046812] ? security_mmap_addr+0x7d/0xa0 [ 31.047399] ? get_unmapped_area+0x1f5/0x3f0 [ 31.047957] do_mmap+0x854/0xf00 [ 31.048405] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.048928] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.049500] ksys_mmap_pgoff+0x3af/0x500 [ 31.050024] do_syscall_64+0x3f/0x90 [ 31.050511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.051165] RIP: 0033:0x7fc1d82dcd82 [ 31.051635] 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 [ 31.053798] RSP: 002b:00007ffee324b628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.054725] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc1d82dcd82 [ 31.055573] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc1d7716000 [ 31.056425] RBP: 00007fc1d7716000 R08: 0000000000000009 R09: 0000000000001000 [ 31.057306] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cb348def70 [ 31.058164] R13: 00007ffee324b640 R14: 00007ffee324b670 R15: 00007ffee324b9d0 [ 31.059031] [ 31.059334] [ 31.059548] Allocated by task 211: [ 31.059996] kasan_save_stack+0x22/0x50 [ 31.060511] kasan_set_track+0x25/0x30 [ 31.061026] __kasan_slab_alloc+0x59/0x70 [ 31.061563] kmem_cache_alloc+0x16b/0x370 [ 31.062090] vm_area_dup+0x20/0x160 [ 31.062553] __split_vma+0x170/0x950 [ 31.063028] split_vma+0xc6/0x110 [ 31.063475] mprotect_fixup+0x8d2/0xb30 [ 31.063986] do_mprotect_pkey+0x87e/0xd40 [ 31.064514] __x64_sys_mprotect+0x78/0xc0 [ 31.065058] do_syscall_64+0x3f/0x90 [ 31.065541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.066200] [ 31.066418] Freed by task 211: [ 31.066820] kasan_save_stack+0x22/0x50 [ 31.067329] kasan_set_track+0x25/0x30 [ 31.067831] kasan_save_free_info+0x2b/0x50 [ 31.068373] __kasan_slab_free+0x10a/0x190 [ 31.068938] kmem_cache_free+0x10d/0x4d0 [ 31.069447] rcu_core+0x8c8/0x2860 [ 31.069895] __do_softirq+0x1b7/0x7d4 [ 31.070383] [ 31.070600] Last potentially related work creation: [ 31.071260] kasan_save_stack+0x22/0x50 [ 31.071771] __kasan_record_aux_stack+0x8e/0xa0 [ 31.072388] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.073048] remove_vma+0x139/0x170 [ 31.073507] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.074064] do_vmi_munmap+0x1f1/0x2b0 [ 31.074564] __vm_munmap+0x138/0x3a0 [ 31.075037] __x64_sys_munmap+0x59/0x80 [ 31.075542] do_syscall_64+0x3f/0x90 [ 31.076072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.076729] [ 31.076974] The buggy address belongs to the object at ffff888019ee2658 [ 31.076974] which belongs to the cache vm_area_struct of size 168 [ 31.078463] The buggy address is located 88 bytes inside of [ 31.078463] freed 168-byte region [ffff888019ee2658, ffff888019ee2700) [ 31.079897] [ 31.080117] The buggy address belongs to the physical page: [ 31.080796] page:00000000c454e140 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ee2 [ 31.081903] memcg:ffff88801a0c7e01 [ 31.082331] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.082984] page_type: 0xffffffff() [ 31.083441] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.084366] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0c7e01 [ 31.085292] page dumped because: kasan: bad access detected [ 31.085958] [ 31.086173] Memory state around the buggy address: [ 31.086757] ffff888019ee2580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.087627] ffff888019ee2600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.088496] >ffff888019ee2680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.089377] ^ [ 31.089970] ffff888019ee2700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.090842] ffff888019ee2780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.091709] ================================================================== [ 31.092628] Disabling lock debugging due to kernel taint [ 33.283649] BUG: Bad rss-counter state mm:000000001aa59cf1 type:MM_FILEPAGES val:33 [ 33.284895] BUG: Bad rss-counter state mm:000000001aa59cf1 type:MM_ANONPAGES val:22 [ 33.857373] BUG: Bad rss-counter state mm:000000004d27bc58 type:MM_FILEPAGES val:33 [ 33.858628] BUG: Bad rss-counter state mm:000000004d27bc58 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4918' (ECDSA) to the list of known hosts. 2023/06/20 19:11:14 fuzzer started 2023/06/20 19:11:14 dialing manager at localhost:36067 2023/06/20 19:11:14 checking machine... 2023/06/20 19:11:14 checking revisions... [ 34.540671] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:11:14 testing simple program... [ 34.602515] cgroup: Unknown subsys name 'net' [ 34.652760] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:11:13 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=1ffff1100fffb000 RSI=ffffffff81143243 RDI=0000000000000006 RBP=00000000168297a0 RSP=ffff888019e977a0 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000800 R11=0000000000000000 R12=ffff88807ffd8000 R13=ffff88807ffd8000 R14=ffffffff81c63c8c R15=0000000000000000 RIP=ffffffff8114325d 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 00007f38068d1700 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=00007fff792fb918 CR3=0000000014636000 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=2033313a31313a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a31313a3931203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88807ffd7030 RCX=0000000000000100 RDX=1ffff1100fffae06 RSI=ffffffff8114328a RDI=0000000000000006 RBP=000000001bc47410 RSP=ffff88806cf09d80 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000800 R11=1ffff1100d9e7479 R12=ffff88807ffd7000 R13=ffff88807ffd8000 R14=ffffffff813782f8 R15=ffff88800e2a98a0 RIP=ffffffff8114329f 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 00007f48b2826900 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=00007ffe879c7000 CR3=000000000f79a000 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