syzkaller login: [ 28.715656] BUG: Bad rss-counter state mm:000000000a6b67d5 type:MM_FILEPAGES val:33 [ 28.717120] BUG: Bad rss-counter state mm:000000000a6b67d5 type:MM_ANONPAGES val:22 [ 28.880744] ================================================================== [ 28.881616] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.882504] Read of size 8 at addr ffff8880168b3ed8 by task sshd/221 [ 28.883234] [ 28.883544] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.884362] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.885320] Call Trace: [ 28.885643] [ 28.885914] dump_stack_lvl+0x91/0xf0 [ 28.886384] print_report+0xcc/0x620 [ 28.886849] ? __virt_addr_valid+0x102/0x340 [ 28.887374] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.887956] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.888538] kasan_report+0xbe/0xf0 [ 28.888984] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.889581] vma_interval_tree_remove+0xc75/0xec0 [ 28.890153] vma_prepare+0xc54/0x11a0 [ 28.890617] __split_vma+0x5af/0x950 [ 28.891073] ? __pfx___split_vma+0x10/0x10 [ 28.891586] ? find_held_lock+0x2c/0x110 [ 28.892082] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.892620] ? lock_is_held_type+0x9f/0x120 [ 28.893148] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.893732] ? mtree_range_walk+0x632/0x900 [ 28.894278] ? mas_walk+0x5c7/0x7c0 [ 28.894737] do_vmi_munmap+0x1f1/0x2b0 [ 28.895220] mmap_region+0x1f9/0x2660 [ 28.895691] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.896178] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.896876] ? __pfx_lock_acquire+0x10/0x10 [ 28.897410] ? __pfx_mmap_region+0x10/0x10 [ 28.897923] ? security_mmap_addr+0x7d/0xa0 [ 28.898439] ? get_unmapped_area+0x1f5/0x3f0 [ 28.898970] do_mmap+0x854/0xf00 [ 28.899396] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.899859] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.900399] ksys_mmap_pgoff+0x3af/0x500 [ 28.900884] do_syscall_64+0x3f/0x90 [ 28.901366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.901975] RIP: 0033:0x7f9c91fbad82 [ 28.902409] 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 [ 28.904443] RSP: 002b:00007ffc72ef4fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.905317] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9c91fbad82 [ 28.906124] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9c913f4000 [ 28.906945] RBP: 00007f9c913f4000 R08: 0000000000000009 R09: 0000000000001000 [ 28.907762] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ec1d33aec0 [ 28.908583] R13: 00007ffc72ef5000 R14: 00007ffc72ef5030 R15: 00007ffc72ef5390 [ 28.909418] [ 28.909693] [ 28.909900] Allocated by task 214: [ 28.910299] kasan_save_stack+0x22/0x50 [ 28.910779] kasan_set_track+0x25/0x30 [ 28.911256] __kasan_slab_alloc+0x59/0x70 [ 28.911753] kmem_cache_alloc+0x16b/0x370 [ 28.912244] vm_area_dup+0x20/0x160 [ 28.912694] __split_vma+0x170/0x950 [ 28.913146] split_vma+0xc6/0x110 [ 28.913566] mprotect_fixup+0x8d2/0xb30 [ 28.914053] do_mprotect_pkey+0x87e/0xd40 [ 28.914564] __x64_sys_mprotect+0x78/0xc0 [ 28.915058] do_syscall_64+0x3f/0x90 [ 28.915511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.916134] [ 28.916345] Freed by task 211: [ 28.916720] kasan_save_stack+0x22/0x50 [ 28.917225] kasan_set_track+0x25/0x30 [ 28.917688] kasan_save_free_info+0x2b/0x50 [ 28.918193] __kasan_slab_free+0x10a/0x190 [ 28.918692] kmem_cache_free+0x10d/0x4d0 [ 28.919183] rcu_core+0x8c8/0x2860 [ 28.919604] __do_softirq+0x1b7/0x7d4 [ 28.920059] [ 28.920266] Last potentially related work creation: [ 28.920826] kasan_save_stack+0x22/0x50 [ 28.921312] __kasan_record_aux_stack+0x8e/0xa0 [ 28.921855] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.922459] remove_vma+0x139/0x170 [ 28.922880] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.923414] do_vmi_munmap+0x1f1/0x2b0 [ 28.923874] __vm_munmap+0x138/0x3a0 [ 28.924324] __x64_sys_munmap+0x59/0x80 [ 28.924805] do_syscall_64+0x3f/0x90 [ 28.925269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.925871] [ 28.926071] The buggy address belongs to the object at ffff8880168b3e80 [ 28.926071] which belongs to the cache vm_area_struct of size 168 [ 28.927492] The buggy address is located 88 bytes inside of [ 28.927492] freed 168-byte region [ffff8880168b3e80, ffff8880168b3f28) [ 28.928830] [ 28.929037] The buggy address belongs to the physical page: [ 28.929698] page:00000000e113e8de refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168b3 [ 28.930729] memcg:ffff88800dcec201 [ 28.931133] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.931746] page_type: 0xffffffff() [ 28.932171] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.933048] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcec201 [ 28.933942] page dumped because: kasan: bad access detected [ 28.934571] [ 28.934778] Memory state around the buggy address: [ 28.935334] ffff8880168b3d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.936176] ffff8880168b3e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 28.936978] >ffff8880168b3e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.937799] ^ [ 28.938482] ffff8880168b3f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 28.939285] ffff8880168b3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.940082] ================================================================== [ 28.941028] Disabling lock debugging due to kernel taint [ 31.287239] BUG: Bad rss-counter state mm:000000001311116a type:MM_FILEPAGES val:33 [ 31.288371] BUG: Bad rss-counter state mm:000000001311116a type:MM_ANONPAGES val:22 [ 31.683696] BUG: Bad rss-counter state mm:0000000036946a14 type:MM_FILEPAGES val:33 [ 31.684733] BUG: Bad rss-counter state mm:0000000036946a14 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25609' (ECDSA) to the list of known hosts. 2023/06/20 23:11:36 fuzzer started 2023/06/20 23:11:36 dialing manager at localhost:36067 2023/06/20 23:11:36 checking machine... 2023/06/20 23:11:36 checking revisions... [ 32.378660] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:11:36 testing simple program... [ 32.438317] cgroup: Unknown subsys name 'net' [ 32.483802] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:11:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800909a658 RCX=0000000000000000 RDX=ffff88800f4bd1c0 RSI=ffffffff818d5889 RDI=ffff88800909aab0 RBP=dffffc0000000000 RSP=ffff8880147bf718 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=3830306234386136 R12=000000000000021c R13=0000000000000200 R14=ffffffff87f35080 R15=000000005b3cd92f RIP=ffffffff818d58b2 RFL=00000216 [----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 00007f1f3cfa7900 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=00007f1f3c403ee0 CR3=000000000c7f4000 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=246a754f1ac2642400000000000ae988 XMM05=b4fe8b63ae7fa0260000000000133ae8 XMM06=c291bd5c70af25b900000000001328d8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff815342db RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81839bfd RSP=ffff88806cf09db0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88807ffdc000 R13=0000000000000005 R14=00000000fffffe80 R15=0000000000000000 RIP=ffffffff8180f135 RFL=00000046 [---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 00007ff8f4c6d900 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=00007ff8f5224618 CR3=000000000eb52000 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