Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.666569] BUG: Bad rss-counter state mm:00000000fdf68b8c type:MM_FILEPAGES val:33 [ 32.667574] BUG: Bad rss-counter state mm:00000000fdf68b8c type:MM_ANONPAGES val:22 [ 32.831036] ================================================================== [ 32.831960] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.832912] Read of size 8 at addr ffff88800e9ae4e0 by task sshd/220 [ 32.833805] [ 32.834029] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.834921] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.835923] Call Trace: [ 32.836246] [ 32.836536] dump_stack_lvl+0x91/0xf0 [ 32.837047] print_report+0xcc/0x620 [ 32.837537] ? __virt_addr_valid+0x102/0x340 [ 32.838094] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.838725] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.839345] kasan_report+0xbe/0xf0 [ 32.839827] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.840461] vma_interval_tree_remove+0xc75/0xec0 [ 32.841058] vma_prepare+0xc54/0x11a0 [ 32.841546] __split_vma+0x5af/0x950 [ 32.842021] ? __pfx___split_vma+0x10/0x10 [ 32.842577] ? find_held_lock+0x2c/0x110 [ 32.843100] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.843665] ? lock_is_held_type+0x9f/0x120 [ 32.844209] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.844817] ? mtree_range_walk+0x632/0x900 [ 32.845368] ? mas_walk+0x5c7/0x7c0 [ 32.845847] do_vmi_munmap+0x1f1/0x2b0 [ 32.846349] mmap_region+0x1f9/0x2660 [ 32.846835] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.847357] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.848076] ? __pfx_lock_acquire+0x10/0x10 [ 32.848629] ? __pfx_mmap_region+0x10/0x10 [ 32.849190] ? security_mmap_addr+0x7d/0xa0 [ 32.849735] ? get_unmapped_area+0x1f5/0x3f0 [ 32.850305] do_mmap+0x854/0xf00 [ 32.850774] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.851294] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.851876] ksys_mmap_pgoff+0x3af/0x500 [ 32.852410] do_syscall_64+0x3f/0x90 [ 32.852903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.853573] RIP: 0033:0x7f24e9407d82 [ 32.854046] 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 [ 32.856293] RSP: 002b:00007ffdceba44f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.857235] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f24e9407d82 [ 32.858129] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f24e8841000 [ 32.859019] RBP: 00007f24e8841000 R08: 0000000000000009 R09: 0000000000001000 [ 32.859911] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d3cc59b20 [ 32.860800] R13: 00007ffdceba4510 R14: 00007ffdceba4540 R15: 00007ffdceba48a0 [ 32.861700] [ 32.862014] [ 32.862236] Allocated by task 213: [ 32.862702] kasan_save_stack+0x22/0x50 [ 32.863231] kasan_set_track+0x25/0x30 [ 32.863749] __kasan_slab_alloc+0x59/0x70 [ 32.864307] kmem_cache_alloc+0x16b/0x370 [ 32.864843] vm_area_dup+0x20/0x160 [ 32.865322] __split_vma+0x170/0x950 [ 32.865801] split_vma+0xc6/0x110 [ 32.866256] mprotect_fixup+0x8d2/0xb30 [ 32.866799] do_mprotect_pkey+0x87e/0xd40 [ 32.867346] __x64_sys_mprotect+0x78/0xc0 [ 32.867873] do_syscall_64+0x3f/0x90 [ 32.868364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.869028] [ 32.869256] Freed by task 213: [ 32.869665] kasan_save_stack+0x22/0x50 [ 32.870190] kasan_set_track+0x25/0x30 [ 32.870724] kasan_save_free_info+0x2b/0x50 [ 32.871285] __kasan_slab_free+0x10a/0x190 [ 32.871840] kmem_cache_free+0x10d/0x4d0 [ 32.872365] rcu_core+0x8c8/0x2860 [ 32.872835] __do_softirq+0x1b7/0x7d4 [ 32.873328] [ 32.873552] Last potentially related work creation: [ 32.874167] kasan_save_stack+0x22/0x50 [ 32.874706] __kasan_record_aux_stack+0x8e/0xa0 [ 32.875307] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.875982] remove_vma+0x139/0x170 [ 32.876455] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.877039] do_vmi_munmap+0x1f1/0x2b0 [ 32.877542] __vm_munmap+0x138/0x3a0 [ 32.878031] __x64_sys_munmap+0x59/0x80 [ 32.878556] do_syscall_64+0x3f/0x90 [ 32.879051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.879703] [ 32.879930] The buggy address belongs to the object at ffff88800e9ae488 [ 32.879930] which belongs to the cache vm_area_struct of size 168 [ 32.881437] The buggy address is located 88 bytes inside of [ 32.881437] freed 168-byte region [ffff88800e9ae488, ffff88800e9ae530) [ 32.882856] [ 32.883070] The buggy address belongs to the physical page: [ 32.883730] page:00000000fcd0ad3d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9ae [ 32.884804] memcg:ffff88800d23db01 [ 32.885227] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.885871] page_type: 0xffffffff() [ 32.886332] raw: 0100000000000200 ffff88800879fc80 ffffea0000390580 dead000000000006 [ 32.887251] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d23db01 [ 32.888152] page dumped because: kasan: bad access detected [ 32.888812] [ 32.889025] Memory state around the buggy address: [ 32.889599] ffff88800e9ae380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.890462] ffff88800e9ae400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.891315] >ffff88800e9ae480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.892163] ^ [ 32.892917] ffff88800e9ae500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.893786] ffff88800e9ae580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.894656] ================================================================== [ 32.895749] Disabling lock debugging due to kernel taint [ 35.425771] BUG: Bad rss-counter state mm:00000000191702b0 type:MM_FILEPAGES val:33 [ 35.427048] BUG: Bad rss-counter state mm:00000000191702b0 type:MM_ANONPAGES val:22 [ 35.832788] BUG: Bad rss-counter state mm:000000008cfd3e53 type:MM_FILEPAGES val:33 [ 35.833722] BUG: Bad rss-counter state mm:000000008cfd3e53 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14733' (ECDSA) to the list of known hosts. 2023/06/20 07:49:18 fuzzer started 2023/06/20 07:49:18 dialing manager at localhost:44161 2023/06/20 07:49:18 checking machine... 2023/06/20 07:49:18 checking revisions... [ 36.573896] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:49:18 testing simple program... [ 36.617440] cgroup: Unknown subsys name 'net' [ 36.670312] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:49:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffea000039bcc0 RCX=0000000000000000 RDX=ffff88800844f780 RSI=ffffffff811431c2 RDI=0000777f80000000 RBP=0000000000000000 RSP=ffff88800f05f860 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000000 R12=ffffffff81845c80 R13=ffffea000040de00 R14=ffffffff83677d2f R15=0000000000000014 RIP=ffffffff8180c49b 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f68765ea900 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=00007fa26b4c1280 CR3=000000000e75c000 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=563412feff00545000000000000080fe 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=ffff888008c58400 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=00007f6876ba1618 CR3=000000000cbdc000 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=2037313a39343a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a39343a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000