Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 38.400105] BUG: Bad rss-counter state mm:00000000f2890308 type:MM_FILEPAGES val:33 [ 38.401815] BUG: Bad rss-counter state mm:00000000f2890308 type:MM_ANONPAGES val:22 [ 38.598129] ================================================================== [ 38.598759] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.599373] Read of size 8 at addr ffff888010176798 by task sshd/222 [ 38.600997] [ 38.601151] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.601756] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.602472] Call Trace: [ 38.602692] [ 38.602882] dump_stack_lvl+0x91/0xf0 [ 38.603212] print_report+0xcc/0x620 [ 38.603575] ? __virt_addr_valid+0x102/0x340 [ 38.604107] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.604504] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.605021] kasan_report+0xbe/0xf0 [ 38.605367] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.605848] vma_interval_tree_remove+0xc75/0xec0 [ 38.606272] vma_prepare+0xc54/0x11a0 [ 38.606582] __split_vma+0x5af/0x950 [ 38.606998] ? __pfx___split_vma+0x10/0x10 [ 38.607981] ? find_held_lock+0x2c/0x110 [ 38.608328] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.608744] ? lock_is_held_type+0x9f/0x120 [ 38.609078] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.609439] ? mtree_range_walk+0x632/0x900 [ 38.609852] ? mas_walk+0x5c7/0x7c0 [ 38.610158] do_vmi_munmap+0x1f1/0x2b0 [ 38.610476] mmap_region+0x1f9/0x2660 [ 38.610841] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.611174] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.611721] ? __pfx_lock_acquire+0x10/0x10 [ 38.612068] ? __pfx_mmap_region+0x10/0x10 [ 38.612416] ? security_mmap_addr+0x7d/0xa0 [ 38.612819] ? get_unmapped_area+0x1f5/0x3f0 [ 38.613182] do_mmap+0x854/0xf00 [ 38.613474] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.613854] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.614223] ksys_mmap_pgoff+0x3af/0x500 [ 38.614558] do_syscall_64+0x3f/0x90 [ 38.614927] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.615361] RIP: 0033:0x7f1a29dd7d82 [ 38.616295] 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 [ 38.617762] RSP: 002b:00007ffd8e715118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.618319] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1a29dd7d82 [ 38.618902] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1a29211000 [ 38.619476] RBP: 00007f1a29211000 R08: 0000000000000009 R09: 0000000000001000 [ 38.620081] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f00ec4d90 [ 38.620630] R13: 00007ffd8e715130 R14: 00007ffd8e715160 R15: 00007ffd8e7154c0 [ 38.621242] [ 38.621439] [ 38.621585] Allocated by task 213: [ 38.621925] kasan_save_stack+0x22/0x50 [ 38.622338] kasan_set_track+0x25/0x30 [ 38.622740] __kasan_slab_alloc+0x59/0x70 [ 38.623156] kmem_cache_alloc+0x16b/0x370 [ 38.623609] vm_area_dup+0x20/0x160 [ 38.623988] __split_vma+0x170/0x950 [ 38.624275] split_vma+0xc6/0x110 [ 38.624559] mprotect_fixup+0x8d2/0xb30 [ 38.624944] do_mprotect_pkey+0x87e/0xd40 [ 38.625288] __x64_sys_mprotect+0x78/0xc0 [ 38.625629] do_syscall_64+0x3f/0x90 [ 38.626001] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.626423] [ 38.626567] Freed by task 19: [ 38.626873] kasan_save_stack+0x22/0x50 [ 38.627208] kasan_set_track+0x25/0x30 [ 38.628212] kasan_save_free_info+0x2b/0x50 [ 38.628563] __kasan_slab_free+0x10a/0x190 [ 38.628967] kmem_cache_free+0x10d/0x4d0 [ 38.629304] rcu_core+0x8c8/0x2860 [ 38.629601] __do_softirq+0x1b7/0x7d4 [ 38.629971] [ 38.630115] Last potentially related work creation: [ 38.630492] kasan_save_stack+0x22/0x50 [ 38.630875] __kasan_record_aux_stack+0x8e/0xa0 [ 38.631249] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.631744] remove_vma+0x139/0x170 [ 38.632042] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.632406] do_vmi_munmap+0x1f1/0x2b0 [ 38.632757] __vm_munmap+0x138/0x3a0 [ 38.633060] __x64_sys_munmap+0x59/0x80 [ 38.633389] do_syscall_64+0x3f/0x90 [ 38.633761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.634184] [ 38.634329] Second to last potentially related work creation: [ 38.634822] kasan_save_stack+0x22/0x50 [ 38.635154] __kasan_record_aux_stack+0x8e/0xa0 [ 38.636131] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.636553] remove_vma+0x139/0x170 [ 38.636903] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.637270] do_vmi_munmap+0x1f1/0x2b0 [ 38.637592] __vm_munmap+0x138/0x3a0 [ 38.637955] elf_map+0x26f/0x310 [ 38.638252] load_elf_binary+0x3417/0x5030 [ 38.638608] bprm_execve+0x803/0x1940 [ 38.638968] kernel_execve+0x3ee/0x510 [ 38.639287] kernel_init+0x14f/0x2d0 [ 38.639625] ret_from_fork+0x2c/0x50 [ 38.639990] [ 38.640134] The buggy address belongs to the object at ffff888010176740 [ 38.640134] which belongs to the cache vm_area_struct of size 168 [ 38.641125] The buggy address is located 88 bytes inside of [ 38.641125] freed 168-byte region [ffff888010176740, ffff8880101767e8) [ 38.642079] [ 38.642223] The buggy address belongs to the physical page: [ 38.642694] page:00000000ff9a7472 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10176 [ 38.643990] memcg:ffff88800d1ebe01 [ 38.644275] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.644784] page_type: 0xffffffff() [ 38.645082] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c0500 dead000000000003 [ 38.645740] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d1ebe01 [ 38.646322] page dumped because: kasan: bad access detected [ 38.646888] [ 38.647032] Memory state around the buggy address: [ 38.647434] ffff888010176680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.648041] ffff888010176700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.648836] >ffff888010176780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.649473] ^ [ 38.649904] ffff888010176800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.650539] ffff888010176880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.651235] ================================================================== [ 38.662931] Disabling lock debugging due to kernel taint [ 43.624062] BUG: Bad rss-counter state mm:00000000b33d2e86 type:MM_FILEPAGES val:33 [ 43.625842] BUG: Bad rss-counter state mm:00000000b33d2e86 type:MM_ANONPAGES val:22 [ 44.166335] BUG: Bad rss-counter state mm:00000000189f5472 type:MM_FILEPAGES val:33 [ 44.167266] BUG: Bad rss-counter state mm:00000000189f5472 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55781' (ECDSA) to the list of known hosts. 2023/06/21 08:23:02 fuzzer started 2023/06/21 08:23:03 dialing manager at localhost:36067 2023/06/21 08:23:03 checking machine... 2023/06/21 08:23:03 checking revisions... [ 45.188738] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:23:03 testing simple program... [ 45.249371] cgroup: Unknown subsys name 'net' [ 45.308383] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:23:02 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fc6644ec328 CR3=0000000005482000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801bc52be0 RCX=0000000000000000 RDX=ffffffff87b89c40 RSI=ffffffff848ff1e0 RDI=ffff88801bc52c00 RBP=ffff88801bc52bf8 RSP=ffff88800fe0f870 R8 =0000000000000002 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff87b89c40 R13=0000000000000000 R14=ffff88801bc52c28 R15=ffff88801bc52be0 RIP=ffffffff812db2a2 RFL=00000296 [--S-AP-] 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 00007f5bdcceb900 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=00007f5bdcceb6f8 CR3=000000000df0e000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000