syzkaller login: [ 49.150133] BUG: Bad rss-counter state mm:000000008765516f type:MM_FILEPAGES val:33 [ 49.150869] BUG: Bad rss-counter state mm:000000008765516f type:MM_ANONPAGES val:22 [ 49.267388] ================================================================== [ 49.268049] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.268716] Read of size 8 at addr ffff88800dfacb38 by task sshd/219 [ 49.269252] [ 49.269411] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.270021] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.270802] Call Trace: [ 49.271029] [ 49.271230] dump_stack_lvl+0x91/0xf0 [ 49.271589] print_report+0xcc/0x620 [ 49.271933] ? __virt_addr_valid+0x102/0x340 [ 49.272322] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.272754] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.273204] kasan_report+0xbe/0xf0 [ 49.273542] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.273878] vma_interval_tree_remove+0xc75/0xec0 [ 49.274181] vma_prepare+0xc54/0x11a0 [ 49.274424] __split_vma+0x5af/0x950 [ 49.274669] ? __pfx___split_vma+0x10/0x10 [ 49.274935] ? find_held_lock+0x2c/0x110 [ 49.275200] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.275492] ? lock_is_held_type+0x9f/0x120 [ 49.275765] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.276069] ? mtree_range_walk+0x632/0x900 [ 49.276348] ? mas_walk+0x5c7/0x7c0 [ 49.276588] do_vmi_munmap+0x1f1/0x2b0 [ 49.276841] mmap_region+0x1f9/0x2660 [ 49.277092] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.277352] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.277713] ? __pfx_lock_acquire+0x10/0x10 [ 49.277983] ? __pfx_mmap_region+0x10/0x10 [ 49.278252] ? security_mmap_addr+0x7d/0xa0 [ 49.278519] ? get_unmapped_area+0x1f5/0x3f0 [ 49.278802] do_mmap+0x854/0xf00 [ 49.279024] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.279274] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.279575] ksys_mmap_pgoff+0x3af/0x500 [ 49.279832] do_syscall_64+0x3f/0x90 [ 49.280071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.280396] RIP: 0033:0x7fcfb3186d82 [ 49.280626] 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 [ 49.281674] RSP: 002b:00007fffcea1d548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.282123] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcfb3186d82 [ 49.282543] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcfb25c0000 [ 49.282963] RBP: 00007fcfb25c0000 R08: 0000000000000009 R09: 0000000000001000 [ 49.283382] R10: 0000000000000812 R11: 0000000000000206 R12: 00005605a2db9ec0 [ 49.283820] R13: 00007fffcea1d560 R14: 00007fffcea1d590 R15: 00007fffcea1d8f0 [ 49.284244] [ 49.284391] [ 49.284499] Allocated by task 212: [ 49.284719] kasan_save_stack+0x22/0x50 [ 49.284972] kasan_set_track+0x25/0x30 [ 49.285218] __kasan_slab_alloc+0x59/0x70 [ 49.285481] kmem_cache_alloc+0x16b/0x370 [ 49.285739] vm_area_dup+0x20/0x160 [ 49.285966] __split_vma+0x170/0x950 [ 49.286227] split_vma+0xc6/0x110 [ 49.286462] mprotect_fixup+0x8d2/0xb30 [ 49.286735] do_mprotect_pkey+0x87e/0xd40 [ 49.287011] __x64_sys_mprotect+0x78/0xc0 [ 49.287294] do_syscall_64+0x3f/0x90 [ 49.287556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.287908] [ 49.288025] Freed by task 13: [ 49.288230] kasan_save_stack+0x22/0x50 [ 49.288497] kasan_set_track+0x25/0x30 [ 49.288766] kasan_save_free_info+0x2b/0x50 [ 49.289050] __kasan_slab_free+0x10a/0x190 [ 49.289332] kmem_cache_free+0x10d/0x4d0 [ 49.289602] rcu_core+0x8c8/0x2860 [ 49.289847] __do_softirq+0x1b7/0x7d4 [ 49.290107] [ 49.290221] Last potentially related work creation: [ 49.290541] kasan_save_stack+0x22/0x50 [ 49.290809] __kasan_record_aux_stack+0x8e/0xa0 [ 49.291115] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.291472] remove_vma+0x139/0x170 [ 49.291717] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.292013] do_vmi_munmap+0x1f1/0x2b0 [ 49.292270] __vm_munmap+0x138/0x3a0 [ 49.292519] __x64_sys_munmap+0x59/0x80 [ 49.292794] do_syscall_64+0x3f/0x90 [ 49.293044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.293385] [ 49.293499] Second to last potentially related work creation: [ 49.293860] kasan_save_stack+0x22/0x50 [ 49.294128] __kasan_record_aux_stack+0x8e/0xa0 [ 49.294433] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.294773] remove_vma+0x139/0x170 [ 49.295014] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.295307] do_vmi_munmap+0x1f1/0x2b0 [ 49.295580] mmap_region+0x1f9/0x2660 [ 49.295840] do_mmap+0x854/0xf00 [ 49.296081] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.296353] ksys_mmap_pgoff+0x3af/0x500 [ 49.296638] do_syscall_64+0x3f/0x90 [ 49.296904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.297267] [ 49.297390] The buggy address belongs to the object at ffff88800dfacae0 [ 49.297390] which belongs to the cache vm_area_struct of size 168 [ 49.298235] The buggy address is located 88 bytes inside of [ 49.298235] freed 168-byte region [ffff88800dfacae0, ffff88800dfacb88) [ 49.299047] [ 49.299170] The buggy address belongs to the physical page: [ 49.299566] page:00000000efd06fe5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfac [ 49.300186] memcg:ffff88800e1f7201 [ 49.300428] flags: 0x100000000000200(slab|node=0|zone=1) [ 49.300792] page_type: 0xffffffff() [ 49.301046] raw: 0100000000000200 ffff88800879fc80 ffffea0000258bc0 dead000000000008 [ 49.301566] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1f7201 [ 49.302070] page dumped because: kasan: bad access detected [ 49.302444] [ 49.302562] Memory state around the buggy address: [ 49.302893] ffff88800dfaca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.303380] ffff88800dfaca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 49.303885] >ffff88800dfacb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.304359] ^ [ 49.304702] ffff88800dfacb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 49.305189] ffff88800dfacc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 49.305659] ================================================================== [ 49.306228] Disabling lock debugging due to kernel taint [ 51.083813] BUG: Bad rss-counter state mm:00000000c3718b7c type:MM_FILEPAGES val:33 [ 51.084417] BUG: Bad rss-counter state mm:00000000c3718b7c type:MM_ANONPAGES val:22 [ 51.506375] BUG: Bad rss-counter state mm:000000003e951545 type:MM_FILEPAGES val:33 [ 51.507418] BUG: Bad rss-counter state mm:000000003e951545 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34745' (ECDSA) to the list of known hosts. 2023/06/19 12:54:28 fuzzer started 2023/06/19 12:54:28 dialing manager at localhost:44161 2023/06/19 12:54:28 checking machine... 2023/06/19 12:54:28 checking revisions... [ 52.253837] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:54:28 testing simple program... [ 52.305709] cgroup: Unknown subsys name 'net' [ 52.359740] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:54:17 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff1100d9c13ab RSP=ffff88806ce09d48 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff81803a7c R14=ffffffff818d9dc6 R15=ffff88800c77b380 RIP=ffffffff812d8ad3 RFL=00000247 [---Z-PC] 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 00007feff6ebf900 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=00007f75effea650 CR3=000000000c8e0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6bbce22197d153a000000000000ae988 XMM05=b20c116b0079c6470000000000136600 XMM06=19e9129bd510f2350000000000135128 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8363c1b1 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888018f1fe01 RSI=ffff888018f1fe18 RDI=ffff888018f1fe18 RBP=ffff888018f1f9d0 RSP=ffff888018f1f908 R8 =ffffffff863b0d4c R9 =ffff888018f1f9b8 R10=0000000000038001 R11=000000000008a6e6 R12=ffff888018f1f9d8 R13=ffff888018f1f9c0 R14=ffff888018f1fe20 R15=ffff888018f1f978 RIP=ffffffff81131041 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 00007f75efa35900 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=00007f75effec618 CR3=000000001cafc000 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=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