syzkaller login: [ 38.784150] BUG: Bad rss-counter state mm:00000000f43938a8 type:MM_FILEPAGES val:33 [ 38.785213] BUG: Bad rss-counter state mm:00000000f43938a8 type:MM_ANONPAGES val:22 [ 38.939251] ================================================================== [ 38.940221] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.941216] Read of size 8 at addr ffff88800e21cb38 by task sshd/218 [ 38.942167] [ 38.942415] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.943331] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.944384] Call Trace: [ 38.944725] [ 38.945025] dump_stack_lvl+0x91/0xf0 [ 38.945549] print_report+0xcc/0x620 [ 38.946063] ? __virt_addr_valid+0x102/0x340 [ 38.946659] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.947313] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.947961] kasan_report+0xbe/0xf0 [ 38.948465] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.949124] vma_interval_tree_remove+0xc75/0xec0 [ 38.949767] vma_prepare+0xc54/0x11a0 [ 38.950281] __split_vma+0x5af/0x950 [ 38.950805] ? __pfx___split_vma+0x10/0x10 [ 38.951373] ? find_held_lock+0x2c/0x110 [ 38.951932] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.952536] ? lock_is_held_type+0x9f/0x120 [ 38.953117] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.953767] ? mtree_range_walk+0x632/0x900 [ 38.954366] ? mas_walk+0x5c7/0x7c0 [ 38.954880] do_vmi_munmap+0x1f1/0x2b0 [ 38.955405] mmap_region+0x1f9/0x2660 [ 38.955916] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.956459] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.957232] ? __pfx_lock_acquire+0x10/0x10 [ 38.957799] ? __pfx_mmap_region+0x10/0x10 [ 38.958367] ? security_mmap_addr+0x7d/0xa0 [ 38.958935] ? get_unmapped_area+0x1f5/0x3f0 [ 38.959524] do_mmap+0x854/0xf00 [ 38.959992] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.960517] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.961115] ksys_mmap_pgoff+0x3af/0x500 [ 38.961654] do_syscall_64+0x3f/0x90 [ 38.962166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.962871] RIP: 0033:0x7f53a1e6cd82 [ 38.963356] 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 [ 38.965617] RSP: 002b:00007fff5e7c82e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.966582] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f53a1e6cd82 [ 38.967491] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f53a12a6000 [ 38.968395] RBP: 00007f53a12a6000 R08: 0000000000000009 R09: 0000000000001000 [ 38.969300] R10: 0000000000000812 R11: 0000000000000206 R12: 00005622ef591ec0 [ 38.970197] R13: 00007fff5e7c8300 R14: 00007fff5e7c8330 R15: 00007fff5e7c8690 [ 38.971125] [ 38.971435] [ 38.971663] Allocated by task 211: [ 38.972114] kasan_save_stack+0x22/0x50 [ 38.972649] kasan_set_track+0x25/0x30 [ 38.973172] __kasan_slab_alloc+0x59/0x70 [ 38.973725] kmem_cache_alloc+0x16b/0x370 [ 38.974272] vm_area_dup+0x20/0x160 [ 38.974761] __split_vma+0x170/0x950 [ 38.975256] split_vma+0xc6/0x110 [ 38.975716] mprotect_fixup+0x8d2/0xb30 [ 38.976252] do_mprotect_pkey+0x87e/0xd40 [ 38.976808] __x64_sys_mprotect+0x78/0xc0 [ 38.977367] do_syscall_64+0x3f/0x90 [ 38.977872] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.978569] [ 38.978798] Freed by task 211: [ 38.979219] kasan_save_stack+0x22/0x50 [ 38.979754] kasan_set_track+0x25/0x30 [ 38.980278] kasan_save_free_info+0x2b/0x50 [ 38.980847] __kasan_slab_free+0x10a/0x190 [ 38.981421] kmem_cache_free+0x10d/0x4d0 [ 38.981966] rcu_core+0x8c8/0x2860 [ 38.982455] __do_softirq+0x1b7/0x7d4 [ 38.982968] [ 38.983197] Last potentially related work creation: [ 38.983818] kasan_save_stack+0x22/0x50 [ 38.984353] __kasan_record_aux_stack+0x8e/0xa0 [ 38.984959] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.985643] remove_vma+0x139/0x170 [ 38.986125] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.986719] do_vmi_munmap+0x1f1/0x2b0 [ 38.987232] __vm_munmap+0x138/0x3a0 [ 38.987725] __x64_sys_munmap+0x59/0x80 [ 38.988247] do_syscall_64+0x3f/0x90 [ 38.988753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.989435] [ 38.989664] Second to last potentially related work creation: [ 38.990400] kasan_save_stack+0x22/0x50 [ 38.990930] __kasan_record_aux_stack+0x8e/0xa0 [ 38.991537] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.992210] remove_vma+0x139/0x170 [ 38.992680] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.993274] do_vmi_munmap+0x1f1/0x2b0 [ 38.993787] mmap_region+0x1f9/0x2660 [ 38.994298] do_mmap+0x854/0xf00 [ 38.994784] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.995298] ksys_mmap_pgoff+0x3af/0x500 [ 38.995832] do_syscall_64+0x3f/0x90 [ 38.996340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.997025] [ 38.997255] The buggy address belongs to the object at ffff88800e21cae0 [ 38.997255] which belongs to the cache vm_area_struct of size 168 [ 38.998802] The buggy address is located 88 bytes inside of [ 38.998802] freed 168-byte region [ffff88800e21cae0, ffff88800e21cb88) [ 39.000298] [ 39.000528] The buggy address belongs to the physical page: [ 39.001235] page:0000000029f6c8f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe21c [ 39.002394] memcg:ffff88800de5a601 [ 39.002841] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.003579] page_type: 0xffffffff() [ 39.004057] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bb0c0 dead000000000003 [ 39.005026] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de5a601 [ 39.005986] page dumped because: kasan: bad access detected [ 39.006701] [ 39.006930] Memory state around the buggy address: [ 39.007547] ffff88800e21ca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.008452] ffff88800e21ca80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 39.009354] >ffff88800e21cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.010254] ^ [ 39.010904] ffff88800e21cb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 39.011822] ffff88800e21cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.012733] ================================================================== [ 39.013814] Disabling lock debugging due to kernel taint [ 40.867408] BUG: Bad rss-counter state mm:0000000030671f75 type:MM_FILEPAGES val:33 [ 40.868570] BUG: Bad rss-counter state mm:0000000030671f75 type:MM_ANONPAGES val:22 [ 41.301930] BUG: Bad rss-counter state mm:0000000053f081a8 type:MM_FILEPAGES val:33 [ 41.302694] BUG: Bad rss-counter state mm:0000000053f081a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6504' (ECDSA) to the list of known hosts. 2023/06/20 18:51:37 fuzzer started 2023/06/20 18:51:38 dialing manager at localhost:36067 2023/06/20 18:51:38 checking machine... 2023/06/20 18:51:38 checking revisions... [ 42.002039] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:51:38 testing simple program... [ 42.041711] cgroup: Unknown subsys name 'net' [ 42.082678] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:51:37 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=ffff88800e669198 RCX=0000000000000000 RDX=ffff8880181b51c0 RSI=ffffffff83868bf8 RDI=ffffffff85d3d350 RBP=ffff88801ce1fb18 RSP=ffff88801ce1f9f0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=1ffff11001ccd233 R13=00000000000000e3 R14=ffff888008fe8ea0 R15=ffff88800e669100 RIP=ffffffff814c086b RFL=00000086 [--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 00007f9b414e4900 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=00007ffc100c5000 CR3=000000000e516000 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=00007fa6086f5230 CR3=000000000c714000 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=5081613fee92b0a4c540ca9584a42438 XMM02=ec2efd57dc4c00df000000000011b9b8 XMM03=34d6abcd3252043d000000000011ba88 XMM04=a03aa3e76996259700000000000ae988 XMM05=751b9502027dc0b900000000001332c8 XMM06=d6552f626d51656700000000001324a0 XMM07=e042d86d42eb936e00000000001226a0 XMM08=34d6abcd3252043d000000000011ba88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000