[ 23.669899] BUG: Bad rss-counter state mm:00000000e048b56e type:MM_FILEPAGES val:33 [ 23.670889] BUG: Bad rss-counter state mm:00000000e048b56e type:MM_ANONPAGES val:22 [ 23.837678] ================================================================== [ 23.838583] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.839514] Read of size 8 at addr ffff88800ddb0968 by task sshd/218 [ 23.840282] [ 23.840500] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.841467] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.842480] Call Trace: [ 23.842804] [ 23.843094] dump_stack_lvl+0x91/0xf0 [ 23.843592] print_report+0xcc/0x620 [ 23.844079] ? __virt_addr_valid+0x102/0x340 [ 23.844654] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.845284] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.845913] kasan_report+0xbe/0xf0 [ 23.846388] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.847030] vma_interval_tree_remove+0xc75/0xec0 [ 23.847634] vma_prepare+0xc54/0x11a0 [ 23.848111] __split_vma+0x5af/0x950 [ 23.848614] ? __pfx___split_vma+0x10/0x10 [ 23.849139] ? find_held_lock+0x2c/0x110 [ 23.849652] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.850207] ? lock_is_held_type+0x9f/0x120 [ 23.850760] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.851368] ? mtree_range_walk+0x632/0x900 [ 23.851916] ? mas_walk+0x5c7/0x7c0 [ 23.852395] do_vmi_munmap+0x1f1/0x2b0 [ 23.852881] mmap_region+0x1f9/0x2660 [ 23.853362] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.853868] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.854581] ? __pfx_lock_acquire+0x10/0x10 [ 23.855106] ? __pfx_mmap_region+0x10/0x10 [ 23.855628] ? security_mmap_addr+0x7d/0xa0 [ 23.856172] ? get_unmapped_area+0x1f5/0x3f0 [ 23.856719] do_mmap+0x854/0xf00 [ 23.857152] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.857643] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.858207] ksys_mmap_pgoff+0x3af/0x500 [ 23.858710] do_syscall_64+0x3f/0x90 [ 23.859181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.859821] RIP: 0033:0x7f7157cded82 [ 23.860284] 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 [ 23.862370] RSP: 002b:00007ffdbf72d298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.863260] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7157cded82 [ 23.864128] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7157118000 [ 23.864981] RBP: 00007f7157118000 R08: 0000000000000009 R09: 0000000000001000 [ 23.865823] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562c6d320ec0 [ 23.866701] R13: 00007ffdbf72d2b0 R14: 00007ffdbf72d2e0 R15: 00007ffdbf72d640 [ 23.867551] [ 23.867866] [ 23.868092] Allocated by task 211: [ 23.868541] kasan_save_stack+0x22/0x50 [ 23.869044] kasan_set_track+0x25/0x30 [ 23.869530] __kasan_slab_alloc+0x59/0x70 [ 23.870049] kmem_cache_alloc+0x16b/0x370 [ 23.870557] vm_area_dup+0x20/0x160 [ 23.871004] __split_vma+0x170/0x950 [ 23.871462] split_vma+0xc6/0x110 [ 23.871897] mprotect_fixup+0x8d2/0xb30 [ 23.872402] do_mprotect_pkey+0x87e/0xd40 [ 23.872926] __x64_sys_mprotect+0x78/0xc0 [ 23.873451] do_syscall_64+0x3f/0x90 [ 23.873925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.874567] [ 23.874792] Freed by task 209: [ 23.875182] kasan_save_stack+0x22/0x50 [ 23.875691] kasan_set_track+0x25/0x30 [ 23.876218] kasan_save_free_info+0x2b/0x50 [ 23.876768] __kasan_slab_free+0x10a/0x190 [ 23.877318] kmem_cache_free+0x10d/0x4d0 [ 23.877828] rcu_core+0x8c8/0x2860 [ 23.878267] __do_softirq+0x1b7/0x7d4 [ 23.878750] [ 23.878966] Last potentially related work creation: [ 23.879551] kasan_save_stack+0x22/0x50 [ 23.880059] __kasan_record_aux_stack+0x8e/0xa0 [ 23.880639] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.881277] remove_vma+0x139/0x170 [ 23.881723] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.882272] do_vmi_munmap+0x1f1/0x2b0 [ 23.882755] __vm_munmap+0x138/0x3a0 [ 23.883250] __x64_sys_munmap+0x59/0x80 [ 23.883748] do_syscall_64+0x3f/0x90 [ 23.884241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.884883] [ 23.885110] The buggy address belongs to the object at ffff88800ddb0910 [ 23.885110] which belongs to the cache vm_area_struct of size 168 [ 23.886557] The buggy address is located 88 bytes inside of [ 23.886557] freed 168-byte region [ffff88800ddb0910, ffff88800ddb09b8) [ 23.887958] [ 23.888183] The buggy address belongs to the physical page: [ 23.888840] page:000000009c8ecbeb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddb0 [ 23.889940] memcg:ffff88800f5a0901 [ 23.890365] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.891001] page_type: 0xffffffff() [ 23.891441] raw: 0100000000000200 ffff8880087a0c80 ffffea0000395c00 dead000000000008 [ 23.892352] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f5a0901 [ 23.893248] page dumped because: kasan: bad access detected [ 23.893904] [ 23.894119] Memory state around the buggy address: [ 23.894704] ffff88800ddb0800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 23.895555] ffff88800ddb0880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 23.896454] >ffff88800ddb0900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.897333] ^ [ 23.898114] ffff88800ddb0980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 23.898954] ffff88800ddb0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.899795] ================================================================== [ 23.900735] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.649051] BUG: Bad rss-counter state mm:0000000012f329a0 type:MM_FILEPAGES val:33 [ 25.650037] BUG: Bad rss-counter state mm:0000000012f329a0 type:MM_ANONPAGES val:22 [ 26.066270] BUG: Bad rss-counter state mm:000000005151054a type:MM_FILEPAGES val:33 [ 26.066926] BUG: Bad rss-counter state mm:000000005151054a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14471' (ECDSA) to the list of known hosts. 2023/06/20 12:19:59 fuzzer started 2023/06/20 12:19:59 dialing manager at localhost:36067 2023/06/20 12:19:59 checking machine... 2023/06/20 12:19:59 checking revisions... [ 26.752957] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:20:00 testing simple program... [ 26.804786] cgroup: Unknown subsys name 'net' [ 26.842368] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:19:59 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f9c6b861e07 RCX=0000000000000000 RDX=ffff88800e6f0000 RSI=00007f9c6b861e07 RDI=ffffffff85652b60 RBP=00007f9c6b861e07 RSP=ffff88800f00f000 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800f00f118 R13=0000000000000000 R14=ffff88800e6f0000 R15=0000000000000000 RIP=ffffffff814c8456 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 00007f9c6accf900 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=00007f9c6acae020 CR3=000000000fe3e000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea0000202008 RBX=ffffea0000202040 RCX=ffffffff81660a75 RDX=ffff88801617b680 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800b95e3f8 RSP=ffff88800e62fa80 R8 =0000000000000004 R9 =00000000000001fe R10=000000000000007d R11=00000000000b6a61 R12=0000000000000000 R13=dffffc0000000000 R14=000000000000007d R15=ffffea0000202040 RIP=ffffffff814c0438 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 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=00007fa26d135b00 CR3=000000000f644000 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=2039353a39313a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a39313a3231203032 XMM08=733a755f6d65747379733d6a62757320 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000