[ 31.262897] BUG: Bad rss-counter state mm:00000000f6b71b39 type:MM_FILEPAGES val:33 [ 31.264137] BUG: Bad rss-counter state mm:00000000f6b71b39 type:MM_ANONPAGES val:22 [ 31.388673] ================================================================== [ 31.389739] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.390964] Read of size 8 at addr ffff88801bc22ed8 by task sshd/218 [ 31.391824] [ 31.392044] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.392918] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.393882] Call Trace: [ 31.394199] [ 31.394489] dump_stack_lvl+0x91/0xf0 [ 31.394992] print_report+0xcc/0x620 [ 31.395496] ? __virt_addr_valid+0x102/0x340 [ 31.396039] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.396665] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.397293] kasan_report+0xbe/0xf0 [ 31.397769] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.398391] vma_interval_tree_remove+0xc75/0xec0 [ 31.398993] vma_prepare+0xc54/0x11a0 [ 31.399503] __split_vma+0x5af/0x950 [ 31.399978] ? __pfx___split_vma+0x10/0x10 [ 31.400514] ? find_held_lock+0x2c/0x110 [ 31.401037] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.401604] ? lock_is_held_type+0x9f/0x120 [ 31.402144] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.402753] ? mtree_range_walk+0x632/0x900 [ 31.403317] ? mas_walk+0x5c7/0x7c0 [ 31.403791] do_vmi_munmap+0x1f1/0x2b0 [ 31.404278] mmap_region+0x1f9/0x2660 [ 31.404761] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.405273] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.405987] ? __pfx_lock_acquire+0x10/0x10 [ 31.406527] ? __pfx_mmap_region+0x10/0x10 [ 31.407059] ? security_mmap_addr+0x7d/0xa0 [ 31.407606] ? get_unmapped_area+0x1f5/0x3f0 [ 31.408163] do_mmap+0x854/0xf00 [ 31.408603] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.409100] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.409666] ksys_mmap_pgoff+0x3af/0x500 [ 31.410172] do_syscall_64+0x3f/0x90 [ 31.410657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.411325] RIP: 0033:0x7fa24d591d82 [ 31.411781] 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 [ 31.413891] RSP: 002b:00007ffff73e9958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.414798] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa24d591d82 [ 31.415648] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa24c9cb000 [ 31.416499] RBP: 00007fa24c9cb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.417358] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fc715afec0 [ 31.418212] R13: 00007ffff73e9970 R14: 00007ffff73e99a0 R15: 00007ffff73e9d00 [ 31.419077] [ 31.419390] [ 31.419607] Allocated by task 207: [ 31.420037] kasan_save_stack+0x22/0x50 [ 31.420538] kasan_set_track+0x25/0x30 [ 31.421037] __kasan_slab_alloc+0x59/0x70 [ 31.421566] kmem_cache_alloc+0x16b/0x370 [ 31.422086] vm_area_dup+0x20/0x160 [ 31.422534] __split_vma+0x170/0x950 [ 31.423002] split_vma+0xc6/0x110 [ 31.423465] mprotect_fixup+0x8d2/0xb30 [ 31.423967] do_mprotect_pkey+0x87e/0xd40 [ 31.424487] __x64_sys_mprotect+0x78/0xc0 [ 31.425010] do_syscall_64+0x3f/0x90 [ 31.425498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.426145] [ 31.426367] Freed by task 207: [ 31.426766] kasan_save_stack+0x22/0x50 [ 31.427278] kasan_set_track+0x25/0x30 [ 31.427776] kasan_save_free_info+0x2b/0x50 [ 31.428322] __kasan_slab_free+0x10a/0x190 [ 31.428863] kmem_cache_free+0x10d/0x4d0 [ 31.429373] rcu_core+0x8c8/0x2860 [ 31.429816] __do_softirq+0x1b7/0x7d4 [ 31.430292] [ 31.430509] Last potentially related work creation: [ 31.431096] kasan_save_stack+0x22/0x50 [ 31.431615] __kasan_record_aux_stack+0x8e/0xa0 [ 31.432190] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.432836] remove_vma+0x139/0x170 [ 31.433291] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.433847] do_vmi_munmap+0x1f1/0x2b0 [ 31.434335] __vm_munmap+0x138/0x3a0 [ 31.434804] __x64_sys_munmap+0x59/0x80 [ 31.435306] do_syscall_64+0x3f/0x90 [ 31.435783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.436427] [ 31.436647] The buggy address belongs to the object at ffff88801bc22e80 [ 31.436647] which belongs to the cache vm_area_struct of size 168 [ 31.438110] The buggy address is located 88 bytes inside of [ 31.438110] freed 168-byte region [ffff88801bc22e80, ffff88801bc22f28) [ 31.439529] [ 31.439749] The buggy address belongs to the physical page: [ 31.440404] page:000000006aff8686 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc22 [ 31.441500] memcg:ffff88801bc1a101 [ 31.441932] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.442584] page_type: 0xffffffff() [ 31.443031] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.443963] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc1a101 [ 31.444863] page dumped because: kasan: bad access detected [ 31.445540] [ 31.445756] Memory state around the buggy address: [ 31.446342] ffff88801bc22d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.447196] ffff88801bc22e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.448066] >ffff88801bc22e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.448913] ^ [ 31.449638] ffff88801bc22f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.450487] ffff88801bc22f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.451354] ================================================================== [ 31.452330] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.185967] BUG: Bad rss-counter state mm:0000000063cf7a2e type:MM_FILEPAGES val:33 [ 33.187711] BUG: Bad rss-counter state mm:0000000063cf7a2e type:MM_ANONPAGES val:22 [ 33.635285] BUG: Bad rss-counter state mm:00000000f9861116 type:MM_FILEPAGES val:33 [ 33.636289] BUG: Bad rss-counter state mm:00000000f9861116 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44444' (ECDSA) to the list of known hosts. 2023/06/20 23:49:38 fuzzer started 2023/06/20 23:49:39 dialing manager at localhost:36067 2023/06/20 23:49:39 checking machine... 2023/06/20 23:49:39 checking revisions... [ 34.391769] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:49:39 testing simple program... [ 34.443788] cgroup: Unknown subsys name 'net' [ 34.494833] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:49:38 Registers: info registers vcpu 0 RAX=ffffffff86139623 RBX=0000000000000001 RCX=ffffffff8613961e RDX=0000000000000000 RSI=1ffffffff0c272c4 RDI=ffffffff85dfe50c RBP=ffff8880166178c8 RSP=ffff888016617800 R8 =ffffffff861395f4 R9 =ffff8880166178b0 R10=0000000000038001 R11=0000000000020ed2 R12=ffff8880166178d0 R13=ffff8880166178b8 R14=ffff8880166178b1 R15=ffff888016617870 RIP=ffffffff81130a5b RFL=00000212 [----A--] 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 00007fd06d9a1900 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=00007fd06df58618 CR3=000000000f6f0000 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=563412feff00545000000000000080fe 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 info registers vcpu 1 RAX=ffffea000040c840 RBX=ffff888010321720 RCX=ffffea0000000000 RDX=ffff88800844f780 RSI=ffffffff813782f8 RDI=ffff88800844f780 RBP=ffff88806cf09e58 RSP=ffff88806cf09e30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800844f780 R13=ffff888090321720 R14=ffffffff813782f8 R15=ffff8880103217a0 RIP=ffffffff81809a4f RFL=00000282 [--S----] 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 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=00007f87e5fdd7d0 CR3=000000000df6a000 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=2038333a39343a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a39343a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000