[ 24.079025] BUG: Bad rss-counter state mm:0000000096b88016 type:MM_FILEPAGES val:33 [ 24.080769] BUG: Bad rss-counter state mm:0000000096b88016 type:MM_ANONPAGES val:22 [ 24.248013] ================================================================== [ 24.248949] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.249879] Read of size 8 at addr ffff88800c91d6b0 by task sshd/219 [ 24.250632] [ 24.250847] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.251834] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.252836] Call Trace: [ 24.253154] [ 24.253437] dump_stack_lvl+0x91/0xf0 [ 24.253926] print_report+0xcc/0x620 [ 24.254424] ? __virt_addr_valid+0x102/0x340 [ 24.254975] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.255592] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.256229] kasan_report+0xbe/0xf0 [ 24.256716] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.257337] vma_interval_tree_remove+0xc75/0xec0 [ 24.257942] vma_prepare+0xc54/0x11a0 [ 24.258414] __split_vma+0x5af/0x950 [ 24.258882] ? __pfx___split_vma+0x10/0x10 [ 24.259408] ? find_held_lock+0x2c/0x110 [ 24.259924] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.260482] ? lock_is_held_type+0x9f/0x120 [ 24.261040] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.261639] ? mtree_range_walk+0x632/0x900 [ 24.262194] ? mas_walk+0x5c7/0x7c0 [ 24.262680] do_vmi_munmap+0x1f1/0x2b0 [ 24.263177] mmap_region+0x1f9/0x2660 [ 24.263657] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.264171] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.264902] ? __pfx_lock_acquire+0x10/0x10 [ 24.265432] ? __pfx_mmap_region+0x10/0x10 [ 24.265967] ? security_mmap_addr+0x7d/0xa0 [ 24.266497] ? get_unmapped_area+0x1f5/0x3f0 [ 24.267042] do_mmap+0x854/0xf00 [ 24.267481] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.267978] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.268550] ksys_mmap_pgoff+0x3af/0x500 [ 24.269080] do_syscall_64+0x3f/0x90 [ 24.269554] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.270199] RIP: 0033:0x7f3175c44d82 [ 24.270652] 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 [ 24.272805] RSP: 002b:00007fffea208298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.273706] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3175c44d82 [ 24.274555] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f317507e000 [ 24.275405] RBP: 00007f317507e000 R08: 0000000000000009 R09: 0000000000001000 [ 24.276252] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ac34b81ec0 [ 24.277103] R13: 00007fffea2082b0 R14: 00007fffea2082e0 R15: 00007fffea208640 [ 24.277957] [ 24.278253] [ 24.278470] Allocated by task 212: [ 24.278895] kasan_save_stack+0x22/0x50 [ 24.279394] kasan_set_track+0x25/0x30 [ 24.279883] __kasan_slab_alloc+0x59/0x70 [ 24.280410] kmem_cache_alloc+0x16b/0x370 [ 24.280932] vm_area_dup+0x20/0x160 [ 24.281381] __split_vma+0x170/0x950 [ 24.281848] split_vma+0xc6/0x110 [ 24.282293] mprotect_fixup+0x8d2/0xb30 [ 24.282789] do_mprotect_pkey+0x87e/0xd40 [ 24.283305] __x64_sys_mprotect+0x78/0xc0 [ 24.283824] do_syscall_64+0x3f/0x90 [ 24.284293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.284963] [ 24.285178] Freed by task 212: [ 24.285566] kasan_save_stack+0x22/0x50 [ 24.286063] kasan_set_track+0x25/0x30 [ 24.286550] kasan_save_free_info+0x2b/0x50 [ 24.287091] __kasan_slab_free+0x10a/0x190 [ 24.287621] kmem_cache_free+0x10d/0x4d0 [ 24.288125] rcu_core+0x8c8/0x2860 [ 24.288564] __do_softirq+0x1b7/0x7d4 [ 24.289049] [ 24.289261] Last potentially related work creation: [ 24.289843] kasan_save_stack+0x22/0x50 [ 24.290342] __kasan_record_aux_stack+0x8e/0xa0 [ 24.290908] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.291551] remove_vma+0x139/0x170 [ 24.291997] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.292553] do_vmi_munmap+0x1f1/0x2b0 [ 24.293067] __vm_munmap+0x138/0x3a0 [ 24.293538] __x64_sys_munmap+0x59/0x80 [ 24.294037] do_syscall_64+0x3f/0x90 [ 24.294514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.295161] [ 24.295380] The buggy address belongs to the object at ffff88800c91d658 [ 24.295380] which belongs to the cache vm_area_struct of size 168 [ 24.296858] The buggy address is located 88 bytes inside of [ 24.296858] freed 168-byte region [ffff88800c91d658, ffff88800c91d700) [ 24.298247] [ 24.298461] The buggy address belongs to the physical page: [ 24.299107] page:00000000246873a9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc91d [ 24.300178] memcg:ffff88800d6e5201 [ 24.300621] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.301276] page_type: 0xffffffff() [ 24.301722] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c7f80 dead000000000002 [ 24.302637] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6e5201 [ 24.303540] page dumped because: kasan: bad access detected [ 24.304194] [ 24.304407] Memory state around the buggy address: [ 24.304984] ffff88800c91d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.305828] ffff88800c91d600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.306676] >ffff88800c91d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.307528] ^ [ 24.308110] ffff88800c91d700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 24.308974] ffff88800c91d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 24.309811] ================================================================== [ 24.310774] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.427759] BUG: Bad rss-counter state mm:000000003303fd8c type:MM_FILEPAGES val:33 [ 26.428736] BUG: Bad rss-counter state mm:000000003303fd8c type:MM_ANONPAGES val:22 [ 26.835920] BUG: Bad rss-counter state mm:00000000f71f2b6b type:MM_FILEPAGES val:33 [ 26.836937] BUG: Bad rss-counter state mm:00000000f71f2b6b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41005' (ECDSA) to the list of known hosts. 2023/06/21 10:14:08 fuzzer started 2023/06/21 10:14:08 dialing manager at localhost:36067 2023/06/21 10:14:08 checking machine... 2023/06/21 10:14:08 checking revisions... [ 27.610817] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:14:08 testing simple program... [ 27.671638] cgroup: Unknown subsys name 'net' [ 27.712786] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:14:08 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff815343f6 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81810727 RSP=ffff88806ce09de8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000200 R13=ffffea00003bfdc0 R14=ffffffff813782f8 R15=ffff88800eff71b0 RIP=ffffffff81534400 RFL=00000047 [---Z-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 00007fbf5e7ab900 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=00007fbf5ed630b0 CR3=000000001c542000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a78 RCX=0000000000000002 RDX=1ffff1100d9e1350 RSI=ffff88806cf09e48 RDI=ffff88806cf09a80 RBP=ffff88806cf09e48 RSP=ffff88806cf099d0 R8 =ffffffff8613897a R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020cbd R12=0000000000000008 R13=ffff88806cf09ac0 R14=ffff88806cf09e50 R15=ffff88806cf09a78 RIP=ffffffff81130445 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 00007fea85241900 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=00007fea84634e40 CR3=000000000c9de000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5d85af2b6e81345700000000000ae988 XMM05=eecd091b7bd55e930000000000132958 XMM06=dfcdbad4f1609c370000000000131480 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000