[ 30.806372] BUG: Bad rss-counter state mm:000000006fe0c156 type:MM_FILEPAGES val:33 [ 30.807382] BUG: Bad rss-counter state mm:000000006fe0c156 type:MM_ANONPAGES val:22 [ 30.974334] ================================================================== [ 30.975255] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.976183] Read of size 8 at addr ffff88800e120a50 by task sshd/219 [ 30.976947] [ 30.977166] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.978158] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.979136] Call Trace: [ 30.979457] [ 30.979744] dump_stack_lvl+0x91/0xf0 [ 30.980399] print_report+0xcc/0x620 [ 30.980988] ? __virt_addr_valid+0x102/0x340 [ 30.981647] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.982372] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.983138] kasan_report+0xbe/0xf0 [ 30.983756] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.984506] vma_interval_tree_remove+0xc75/0xec0 [ 30.985236] vma_prepare+0xc54/0x11a0 [ 30.985815] __split_vma+0x5af/0x950 [ 30.986386] ? __pfx___split_vma+0x10/0x10 [ 30.987044] ? find_held_lock+0x2c/0x110 [ 30.987680] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.988373] ? lock_is_held_type+0x9f/0x120 [ 30.989026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.989765] ? mtree_range_walk+0x632/0x900 [ 30.990429] ? mas_walk+0x5c7/0x7c0 [ 30.991059] do_vmi_munmap+0x1f1/0x2b0 [ 30.991628] mmap_region+0x1f9/0x2660 [ 30.992111] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.992622] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.993343] ? __pfx_lock_acquire+0x10/0x10 [ 30.993883] ? __pfx_mmap_region+0x10/0x10 [ 30.994443] ? security_mmap_addr+0x7d/0xa0 [ 30.994984] ? get_unmapped_area+0x1f5/0x3f0 [ 30.995528] do_mmap+0x854/0xf00 [ 30.995966] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.996471] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.997041] ksys_mmap_pgoff+0x3af/0x500 [ 30.997553] do_syscall_64+0x3f/0x90 [ 30.998033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.998700] RIP: 0033:0x7f5d3e8f6d82 [ 30.999170] 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 [ 31.001338] RSP: 002b:00007fffaadda4c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.002236] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d3e8f6d82 [ 31.003098] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d3dd30000 [ 31.003934] RBP: 00007f5d3dd30000 R08: 0000000000000009 R09: 0000000000001000 [ 31.004770] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d944f8dd90 [ 31.005629] R13: 00007fffaadda4e0 R14: 00007fffaadda510 R15: 00007fffaadda870 [ 31.006516] [ 31.006839] [ 31.007057] Allocated by task 212: [ 31.007487] kasan_save_stack+0x22/0x50 [ 31.007995] kasan_set_track+0x25/0x30 [ 31.008488] __kasan_slab_alloc+0x59/0x70 [ 31.009022] kmem_cache_alloc+0x16b/0x370 [ 31.009538] vm_area_dup+0x20/0x160 [ 31.009998] __split_vma+0x170/0x950 [ 31.010465] split_vma+0xc6/0x110 [ 31.010928] mprotect_fixup+0x8d2/0xb30 [ 31.011432] do_mprotect_pkey+0x87e/0xd40 [ 31.011955] __x64_sys_mprotect+0x78/0xc0 [ 31.012480] do_syscall_64+0x3f/0x90 [ 31.012953] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.013602] [ 31.013816] Freed by task 212: [ 31.014207] kasan_save_stack+0x22/0x50 [ 31.014723] kasan_set_track+0x25/0x30 [ 31.015212] kasan_save_free_info+0x2b/0x50 [ 31.015752] __kasan_slab_free+0x10a/0x190 [ 31.016282] kmem_cache_free+0x10d/0x4d0 [ 31.016785] rcu_core+0x8c8/0x2860 [ 31.017229] __do_softirq+0x1b7/0x7d4 [ 31.017714] [ 31.017930] Last potentially related work creation: [ 31.018513] kasan_save_stack+0x22/0x50 [ 31.019031] __kasan_record_aux_stack+0x8e/0xa0 [ 31.019604] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.020241] remove_vma+0x139/0x170 [ 31.020715] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.021286] do_vmi_munmap+0x1f1/0x2b0 [ 31.021793] __vm_munmap+0x138/0x3a0 [ 31.022266] __x64_sys_munmap+0x59/0x80 [ 31.022772] do_syscall_64+0x3f/0x90 [ 31.023258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.023920] [ 31.024145] The buggy address belongs to the object at ffff88800e1209f8 [ 31.024145] which belongs to the cache vm_area_struct of size 168 [ 31.025633] The buggy address is located 88 bytes inside of [ 31.025633] freed 168-byte region [ffff88800e1209f8, ffff88800e120aa0) [ 31.027069] [ 31.027287] The buggy address belongs to the physical page: [ 31.027966] page:000000005e1a9492 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe120 [ 31.029050] memcg:ffff88800d68cd01 [ 31.029484] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.030194] page_type: 0xffffffff() [ 31.030675] raw: 0100000000000200 ffff88800879fc80 ffffea00003a7b80 dead000000000005 [ 31.031602] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d68cd01 [ 31.032520] page dumped because: kasan: bad access detected [ 31.033181] [ 31.033399] Memory state around the buggy address: [ 31.033986] ffff88800e120900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.034868] ffff88800e120980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.035716] >ffff88800e120a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.036558] ^ [ 31.037255] ffff88800e120a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 31.038098] ffff88800e120b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.038947] ================================================================== [ 31.040052] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.503305] BUG: Bad rss-counter state mm:0000000037eff98c type:MM_FILEPAGES val:33 [ 33.504453] BUG: Bad rss-counter state mm:0000000037eff98c type:MM_ANONPAGES val:22 [ 33.894616] BUG: Bad rss-counter state mm:00000000b3ec3aeb type:MM_FILEPAGES val:33 [ 33.896168] BUG: Bad rss-counter state mm:00000000b3ec3aeb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54264' (ECDSA) to the list of known hosts. 2023/06/19 13:36:15 fuzzer started 2023/06/19 13:36:16 dialing manager at localhost:44161 2023/06/19 13:36:16 checking machine... 2023/06/19 13:36:16 checking revisions... [ 34.686354] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:36:16 testing simple program... [ 34.741076] cgroup: Unknown subsys name 'net' [ 34.800100] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:36:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860ab1ec RDX=1ffff1100d9c1356 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09ac0 RSP=ffff88806ce099f8 R8 =ffffffff860ab1f0 R9 =ffff88806ce09aa8 R10=0000000000038001 R11=00000000000097aa R12=ffff88806ce09ac8 R13=ffff88806ce09ab0 R14=0000000000000005 R15=ffff88806ce09a68 RIP=ffffffff81130b54 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 00007fc24e3ac900 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=00007ffc368f8000 CR3=000000000c760000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f28097b2f50 CR3=000000000ddae000 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=2035313a36333a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a36333a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000