syzkaller login: [ 38.780966] BUG: Bad rss-counter state mm:00000000b9e000ee type:MM_FILEPAGES val:33 [ 38.782157] BUG: Bad rss-counter state mm:00000000b9e000ee type:MM_ANONPAGES val:22 [ 38.818432] ================================================================== [ 38.819365] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.820333] Read of size 8 at addr ffff88800df13968 by task sshd/219 [ 38.821051] [ 38.821256] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.822068] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.822997] Call Trace: [ 38.823302] [ 38.823571] dump_stack_lvl+0x91/0xf0 [ 38.824032] print_report+0xcc/0x620 [ 38.824483] ? __virt_addr_valid+0x102/0x340 [ 38.824994] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.825564] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.826170] kasan_report+0xbe/0xf0 [ 38.826619] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.827199] vma_interval_tree_remove+0xc75/0xec0 [ 38.827764] vma_prepare+0xc54/0x11a0 [ 38.828212] __split_vma+0x5af/0x950 [ 38.828652] ? __pfx___split_vma+0x10/0x10 [ 38.829178] ? find_held_lock+0x2c/0x110 [ 38.829707] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.830249] ? lock_is_held_type+0x9f/0x120 [ 38.830763] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.831332] ? mtree_range_walk+0x632/0x900 [ 38.831849] ? mas_walk+0x5c7/0x7c0 [ 38.832297] do_vmi_munmap+0x1f1/0x2b0 [ 38.832759] mmap_region+0x1f9/0x2660 [ 38.833212] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.833695] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.834411] ? __pfx_lock_acquire+0x10/0x10 [ 38.834912] ? __pfx_mmap_region+0x10/0x10 [ 38.835408] ? security_mmap_addr+0x7d/0xa0 [ 38.835901] ? get_unmapped_area+0x1f5/0x3f0 [ 38.836417] do_mmap+0x854/0xf00 [ 38.836829] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.837299] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.837835] ksys_mmap_pgoff+0x3af/0x500 [ 38.838311] do_syscall_64+0x3f/0x90 [ 38.838759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.839364] RIP: 0033:0x7fc8be41ad82 [ 38.839794] 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 [ 38.841828] RSP: 002b:00007ffc32252eb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.842741] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc8be41ad82 [ 38.843606] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc8bd854000 [ 38.844468] RBP: 00007fc8bd854000 R08: 0000000000000009 R09: 0000000000001000 [ 38.845330] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c228b30ec0 [ 38.846203] R13: 00007ffc32252ed0 R14: 00007ffc32252f00 R15: 00007ffc32253260 [ 38.847074] [ 38.847363] [ 38.847579] Allocated by task 212: [ 38.848012] kasan_save_stack+0x22/0x50 [ 38.848523] kasan_set_track+0x25/0x30 [ 38.849009] __kasan_slab_alloc+0x59/0x70 [ 38.849528] kmem_cache_alloc+0x16b/0x370 [ 38.850049] vm_area_dup+0x20/0x160 [ 38.850506] __split_vma+0x170/0x950 [ 38.850971] split_vma+0xc6/0x110 [ 38.851406] mprotect_fixup+0x8d2/0xb30 [ 38.851909] do_mprotect_pkey+0x87e/0xd40 [ 38.852425] __x64_sys_mprotect+0x78/0xc0 [ 38.852945] do_syscall_64+0x3f/0x90 [ 38.853414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.854062] [ 38.854280] Freed by task 19: [ 38.854662] kasan_save_stack+0x22/0x50 [ 38.855165] kasan_set_track+0x25/0x30 [ 38.855652] kasan_save_free_info+0x2b/0x50 [ 38.856180] __kasan_slab_free+0x10a/0x190 [ 38.856719] kmem_cache_free+0x10d/0x4d0 [ 38.857224] rcu_core+0x8c8/0x2860 [ 38.857662] __do_softirq+0x1b7/0x7d4 [ 38.858151] [ 38.858367] Last potentially related work creation: [ 38.858947] kasan_save_stack+0x22/0x50 [ 38.859452] __kasan_record_aux_stack+0x8e/0xa0 [ 38.860024] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.860668] remove_vma+0x139/0x170 [ 38.861121] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.861672] do_vmi_munmap+0x1f1/0x2b0 [ 38.862165] __vm_munmap+0x138/0x3a0 [ 38.862629] __x64_sys_munmap+0x59/0x80 [ 38.863130] do_syscall_64+0x3f/0x90 [ 38.863599] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.864238] [ 38.864453] Second to last potentially related work creation: [ 38.865136] kasan_save_stack+0x22/0x50 [ 38.865634] __kasan_record_aux_stack+0x8e/0xa0 [ 38.866212] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.866857] remove_vma+0x139/0x170 [ 38.867303] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.867853] do_vmi_munmap+0x1f1/0x2b0 [ 38.868338] mmap_region+0x1f9/0x2660 [ 38.868814] do_mmap+0x854/0xf00 [ 38.869246] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.869752] ksys_mmap_pgoff+0x3af/0x500 [ 38.870260] do_syscall_64+0x3f/0x90 [ 38.870738] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.871383] [ 38.871601] The buggy address belongs to the object at ffff88800df13910 [ 38.871601] which belongs to the cache vm_area_struct of size 168 [ 38.873055] The buggy address is located 88 bytes inside of [ 38.873055] freed 168-byte region [ffff88800df13910, ffff88800df139b8) [ 38.874453] [ 38.874667] The buggy address belongs to the physical page: [ 38.875328] page:000000007ff013a1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf13 [ 38.876415] memcg:ffff88800df1be01 [ 38.876840] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.877482] page_type: 0xffffffff() [ 38.877941] raw: 0100000000000200 ffff8880087a0c80 ffffea000039f600 dead000000000006 [ 38.878856] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df1be01 [ 38.879755] page dumped because: kasan: bad access detected [ 38.880410] [ 38.880622] Memory state around the buggy address: [ 38.881202] ffff88800df13800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.882078] ffff88800df13880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.882929] >ffff88800df13900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.883780] ^ [ 38.884555] ffff88800df13980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.885407] ffff88800df13a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.886276] ================================================================== [ 38.887440] Disabling lock debugging due to kernel taint [ 40.992149] BUG: Bad rss-counter state mm:0000000023bc2051 type:MM_FILEPAGES val:33 [ 40.993328] BUG: Bad rss-counter state mm:0000000023bc2051 type:MM_ANONPAGES val:22 [ 41.365662] BUG: Bad rss-counter state mm:000000006c3d8566 type:MM_FILEPAGES val:33 [ 41.366664] BUG: Bad rss-counter state mm:000000006c3d8566 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52016' (ECDSA) to the list of known hosts. 2023/06/20 22:48:50 fuzzer started 2023/06/20 22:48:51 dialing manager at localhost:36067 2023/06/20 22:48:51 checking machine... 2023/06/20 22:48:51 checking revisions... [ 42.120603] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:48:51 testing simple program... [ 42.170482] cgroup: Unknown subsys name 'net' [ 42.215333] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:48:50 Registers: info registers vcpu 0 RAX=ffffffff863b3bde RBX=ffffffff85fa53a8 RCX=ffffffff8363e063 RDX=0000000000000000 RSI=ffffffff863b3bde RDI=ffffffff85fa53a8 RBP=ffffffff85fa53ac RSP=ffff88801032f4b8 R8 =ffffffff863b3bde R9 =ffff88801032f5a0 R10=0000000000038001 R11=000000000008aa79 R12=ffffffff85fa53a8 R13=ffffffff85fa53a8 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcb7 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 00007f76e706d900 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=00007ffec9bb4000 CR3=000000000dc78000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f6020bfd740 CR3=000000000daf8000 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=3355670a7e63c69d95479752fae754e8 XMM02=2c67c8bc2e329bc3000000000011b4f0 XMM03=fb795ef6d65770560000000000121e90 XMM04=7114ff57b64833c100000000000ae988 XMM05=dfcdbad4f1609c370000000000132d98 XMM06=6fe9e02328588fd50000000000131f70 XMM07=e042d86d42eb936e0000000000122168 XMM08=0421206566d3e3d7000000000011b550 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000