[ 30.105036] BUG: Bad rss-counter state mm:000000009268e64b type:MM_FILEPAGES val:33 [ 30.106167] BUG: Bad rss-counter state mm:000000009268e64b type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.260874] ================================================================== [ 30.261781] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.262711] Read of size 8 at addr ffff88800df9c5c8 by task sshd/219 [ 30.263477] [ 30.263796] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.264653] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.265676] Call Trace: [ 30.266018] [ 30.266302] dump_stack_lvl+0x91/0xf0 [ 30.266788] print_report+0xcc/0x620 [ 30.267270] ? __virt_addr_valid+0x102/0x340 [ 30.267822] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.268446] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.269085] kasan_report+0xbe/0xf0 [ 30.269565] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.270186] vma_interval_tree_remove+0xc75/0xec0 [ 30.270785] vma_prepare+0xc54/0x11a0 [ 30.271263] __split_vma+0x5af/0x950 [ 30.271732] ? __pfx___split_vma+0x10/0x10 [ 30.272262] ? find_held_lock+0x2c/0x110 [ 30.272783] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.273352] ? lock_is_held_type+0x9f/0x120 [ 30.273892] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.274493] ? mtree_range_walk+0x632/0x900 [ 30.275045] ? mas_walk+0x5c7/0x7c0 [ 30.275520] do_vmi_munmap+0x1f1/0x2b0 [ 30.276021] mmap_region+0x1f9/0x2660 [ 30.276516] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.277044] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.277771] ? __pfx_lock_acquire+0x10/0x10 [ 30.278304] ? __pfx_mmap_region+0x10/0x10 [ 30.278856] ? security_mmap_addr+0x7d/0xa0 [ 30.279383] ? get_unmapped_area+0x1f5/0x3f0 [ 30.279939] do_mmap+0x854/0xf00 [ 30.280380] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.280877] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.281467] ksys_mmap_pgoff+0x3af/0x500 [ 30.281977] do_syscall_64+0x3f/0x90 [ 30.282456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.283103] RIP: 0033:0x7f7f8de8cd82 [ 30.283554] 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 [ 30.285694] RSP: 002b:00007ffcabf9aa98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.286605] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7f8de8cd82 [ 30.287454] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7f8d2c6000 [ 30.288300] RBP: 00007f7f8d2c6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.289201] R10: 0000000000000812 R11: 0000000000000206 R12: 000056241027cd90 [ 30.290052] R13: 00007ffcabf9aab0 R14: 00007ffcabf9aae0 R15: 00007ffcabf9ae40 [ 30.290919] [ 30.291217] [ 30.291431] Allocated by task 212: [ 30.291862] kasan_save_stack+0x22/0x50 [ 30.292365] kasan_set_track+0x25/0x30 [ 30.292859] __kasan_slab_alloc+0x59/0x70 [ 30.293392] kmem_cache_alloc+0x16b/0x370 [ 30.293908] vm_area_dup+0x20/0x160 [ 30.294366] __split_vma+0x170/0x950 [ 30.294833] split_vma+0xc6/0x110 [ 30.295281] mprotect_fixup+0x8d2/0xb30 [ 30.295775] do_mprotect_pkey+0x87e/0xd40 [ 30.296295] __x64_sys_mprotect+0x78/0xc0 [ 30.296821] do_syscall_64+0x3f/0x90 [ 30.297305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.297947] [ 30.298167] Freed by task 203: [ 30.298559] kasan_save_stack+0x22/0x50 [ 30.299063] kasan_set_track+0x25/0x30 [ 30.299556] kasan_save_free_info+0x2b/0x50 [ 30.300087] __kasan_slab_free+0x10a/0x190 [ 30.300618] kmem_cache_free+0x10d/0x4d0 [ 30.301153] rcu_core+0x8c8/0x2860 [ 30.301600] __do_softirq+0x1b7/0x7d4 [ 30.302078] [ 30.302295] Last potentially related work creation: [ 30.302877] kasan_save_stack+0x22/0x50 [ 30.303378] __kasan_record_aux_stack+0x8e/0xa0 [ 30.303948] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.304587] remove_vma+0x139/0x170 [ 30.305055] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.305619] do_vmi_munmap+0x1f1/0x2b0 [ 30.306115] __vm_munmap+0x138/0x3a0 [ 30.306588] __x64_sys_munmap+0x59/0x80 [ 30.307081] do_syscall_64+0x3f/0x90 [ 30.307562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.308211] [ 30.308433] Second to last potentially related work creation: [ 30.309132] kasan_save_stack+0x22/0x50 [ 30.309634] __kasan_record_aux_stack+0x8e/0xa0 [ 30.310219] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.310877] remove_vma+0x139/0x170 [ 30.311339] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.311907] do_vmi_munmap+0x1f1/0x2b0 [ 30.312395] mmap_region+0x1f9/0x2660 [ 30.312885] do_mmap+0x854/0xf00 [ 30.313350] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.313847] ksys_mmap_pgoff+0x3af/0x500 [ 30.314360] do_syscall_64+0x3f/0x90 [ 30.314832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.315483] [ 30.315699] The buggy address belongs to the object at ffff88800df9c570 [ 30.315699] which belongs to the cache vm_area_struct of size 168 [ 30.317200] The buggy address is located 88 bytes inside of [ 30.317200] freed 168-byte region [ffff88800df9c570, ffff88800df9c618) [ 30.318631] [ 30.318845] The buggy address belongs to the physical page: [ 30.319518] page:000000005c2f5429 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf9c [ 30.320626] memcg:ffff88800d34a601 [ 30.321057] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.321721] page_type: 0xffffffff() [ 30.322171] raw: 0100000000000200 ffff8880087a0c80 ffffea0000241340 dead000000000008 [ 30.323115] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d34a601 [ 30.324031] page dumped because: kasan: bad access detected [ 30.324700] [ 30.324931] Memory state around the buggy address: [ 30.325526] ffff88800df9c480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.326395] ffff88800df9c500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.327271] >ffff88800df9c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.328151] ^ [ 30.328833] ffff88800df9c600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.329705] ffff88800df9c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.330573] ================================================================== [ 30.331706] Disabling lock debugging due to kernel taint [ 32.186068] BUG: Bad rss-counter state mm:00000000a89e14cf type:MM_FILEPAGES val:33 [ 32.187079] BUG: Bad rss-counter state mm:00000000a89e14cf type:MM_ANONPAGES val:22 [ 32.728593] BUG: Bad rss-counter state mm:00000000651f79db type:MM_FILEPAGES val:33 [ 32.729822] BUG: Bad rss-counter state mm:00000000651f79db type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20791' (ECDSA) to the list of known hosts. 2023/06/21 06:01:01 fuzzer started 2023/06/21 06:01:01 dialing manager at localhost:36067 2023/06/21 06:01:01 checking machine... 2023/06/21 06:01:01 checking revisions... [ 33.434432] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:01:01 testing simple program... [ 33.487668] cgroup: Unknown subsys name 'net' [ 33.541021] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:01:01 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffffffff85d3e490 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100d9c132e RSP=ffff88806ce09960 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652d08 R15=ffff888013998410 RIP=ffffffff812d8730 RFL=00000246 [---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 0000000000000000 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=00007fe9d9488978 CR3=000000000c99c000 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=00000000000000000000000000000000 XMM01=1f2227ba9a39aeb1c74543181adf4c75 XMM02=ec2efd57dc4c00df000000000011a4e0 XMM03=ae1559d9d1b50b90000000000011a5b0 XMM04=76e617dcd02654be00000000000ae988 XMM05=0d0c0c1cdefcab570000000000133688 XMM06=806171799158d96700000000001323b8 XMM07=e042d86d42eb936e0000000000121678 XMM08=ae1559d9d1b50b90000000000011a5b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=00007f3b584366c3 RCX=0000000080000000 RDX=1ffff110033c7f36 RSI=ffffffff81007b50 RDI=00007f3b584366c3 RBP=00007f3b584366c3 RSP=ffff888019e3f8d8 R8 =ffffffff864bbb58 R9 =ffff888019e3f998 R10=0000000000038001 R11=00000000000b6a61 R12=ffff888019e3fa20 R13=0000000000000000 R14=ffff88800e9b51c0 R15=ffff888006b22d80 RIP=ffffffff814c0871 RFL=00000207 [-----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 00007f3b57f53900 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=00007ffc9d52b000 CR3=000000000eebe000 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=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