syzkaller login: [ 30.861223] BUG: Bad rss-counter state mm:0000000036760b25 type:MM_FILEPAGES val:33 [ 30.862780] BUG: Bad rss-counter state mm:0000000036760b25 type:MM_ANONPAGES val:22 [ 31.029641] ================================================================== [ 31.030772] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.032071] Read of size 8 at addr ffff888016c12a50 by task sshd/221 [ 31.032877] [ 31.033093] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.033971] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.034928] Call Trace: [ 31.035245] [ 31.035527] dump_stack_lvl+0x91/0xf0 [ 31.036013] print_report+0xcc/0x620 [ 31.036493] ? __virt_addr_valid+0x102/0x340 [ 31.037035] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.037662] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.038290] kasan_report+0xbe/0xf0 [ 31.038764] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.039380] vma_interval_tree_remove+0xc75/0xec0 [ 31.039981] vma_prepare+0xc54/0x11a0 [ 31.040457] __split_vma+0x5af/0x950 [ 31.040922] ? __pfx___split_vma+0x10/0x10 [ 31.041467] ? find_held_lock+0x2c/0x110 [ 31.041981] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.042548] ? lock_is_held_type+0x9f/0x120 [ 31.043078] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.043678] ? mtree_range_walk+0x632/0x900 [ 31.044228] ? mas_walk+0x5c7/0x7c0 [ 31.044702] do_vmi_munmap+0x1f1/0x2b0 [ 31.045199] mmap_region+0x1f9/0x2660 [ 31.045682] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.046188] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.046898] ? __pfx_lock_acquire+0x10/0x10 [ 31.047430] ? __pfx_mmap_region+0x10/0x10 [ 31.047951] ? security_mmap_addr+0x7d/0xa0 [ 31.048476] ? get_unmapped_area+0x1f5/0x3f0 [ 31.049022] do_mmap+0x854/0xf00 [ 31.049471] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.049958] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.050523] ksys_mmap_pgoff+0x3af/0x500 [ 31.051028] do_syscall_64+0x3f/0x90 [ 31.051581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.052226] RIP: 0033:0x7f4c68e65d82 [ 31.052685] 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 [ 31.054850] RSP: 002b:00007ffc93716e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.055755] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4c68e65d82 [ 31.056599] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4c6829f000 [ 31.057446] RBP: 00007f4c6829f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.058289] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc315f0d90 [ 31.059128] R13: 00007ffc93716e50 R14: 00007ffc93716e80 R15: 00007ffc937171e0 [ 31.059981] [ 31.060280] [ 31.060494] Allocated by task 214: [ 31.060917] kasan_save_stack+0x22/0x50 [ 31.061438] kasan_set_track+0x25/0x30 [ 31.061928] __kasan_slab_alloc+0x59/0x70 [ 31.062452] kmem_cache_alloc+0x16b/0x370 [ 31.062962] vm_area_dup+0x20/0x160 [ 31.063414] __split_vma+0x170/0x950 [ 31.063880] split_vma+0xc6/0x110 [ 31.064313] mprotect_fixup+0x8d2/0xb30 [ 31.064810] do_mprotect_pkey+0x87e/0xd40 [ 31.065341] __x64_sys_mprotect+0x78/0xc0 [ 31.065855] do_syscall_64+0x3f/0x90 [ 31.066328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.066976] [ 31.067190] Freed by task 13: [ 31.067576] kasan_save_stack+0x22/0x50 [ 31.068077] kasan_set_track+0x25/0x30 [ 31.068569] kasan_save_free_info+0x2b/0x50 [ 31.069093] __kasan_slab_free+0x10a/0x190 [ 31.069645] kmem_cache_free+0x10d/0x4d0 [ 31.070158] rcu_core+0x8c8/0x2860 [ 31.070602] __do_softirq+0x1b7/0x7d4 [ 31.071074] [ 31.071288] Last potentially related work creation: [ 31.071867] kasan_save_stack+0x22/0x50 [ 31.072364] __kasan_record_aux_stack+0x8e/0xa0 [ 31.073026] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.073680] remove_vma+0x139/0x170 [ 31.074128] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.074693] do_vmi_munmap+0x1f1/0x2b0 [ 31.075173] __vm_munmap+0x138/0x3a0 [ 31.075637] __x64_sys_munmap+0x59/0x80 [ 31.076138] do_syscall_64+0x3f/0x90 [ 31.076616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.077267] [ 31.077478] The buggy address belongs to the object at ffff888016c129f8 [ 31.077478] which belongs to the cache vm_area_struct of size 168 [ 31.078953] The buggy address is located 88 bytes inside of [ 31.078953] freed 168-byte region [ffff888016c129f8, ffff888016c12aa0) [ 31.080363] [ 31.080576] The buggy address belongs to the physical page: [ 31.081254] page:0000000067bdb703 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c12 [ 31.082342] memcg:ffff888016cf9801 [ 31.082770] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.083412] page_type: 0xffffffff() [ 31.083860] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.084764] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016cf9801 [ 31.085687] page dumped because: kasan: bad access detected [ 31.086339] [ 31.086553] Memory state around the buggy address: [ 31.087132] ffff888016c12900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.087982] ffff888016c12980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.088839] >ffff888016c12a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.089700] ^ [ 31.090399] ffff888016c12a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.091252] ffff888016c12b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.092094] ================================================================== [ 31.093010] Disabling lock debugging due to kernel taint [ 33.272658] BUG: Bad rss-counter state mm:00000000d45ecb88 type:MM_FILEPAGES val:33 [ 33.273913] BUG: Bad rss-counter state mm:00000000d45ecb88 type:MM_ANONPAGES val:22 [ 33.746033] BUG: Bad rss-counter state mm:000000001e7cf0e1 type:MM_FILEPAGES val:33 [ 33.747113] BUG: Bad rss-counter state mm:000000001e7cf0e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39440' (ECDSA) to the list of known hosts. 2023/06/20 16:15:21 fuzzer started 2023/06/20 16:15:21 dialing manager at localhost:36067 2023/06/20 16:15:21 checking machine... 2023/06/20 16:15:21 checking revisions... [ 34.520942] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:15:21 testing simple program... [ 34.572304] cgroup: Unknown subsys name 'net' [ 34.622140] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:15:21 Registers: info registers vcpu 0 RAX=ffff88806ce0a000 RBX=ffff88806ce09a50 RCX=0000000000000001 RDX=ffff88806ce09a58 RSI=ffff88806ce09a20 RDI=ffff88806ce09a60 RBP=ffff88806ce02000 RSP=ffff88806ce09990 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000006097 R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88806ce09a20 R15=ffff88806ce09a50 RIP=ffffffff81131296 RFL=00000287 [--S--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 00007f26afce2900 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=00007ffdd3b8f000 CR3=00000000161d4000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fe15ea51620 CR3=0000000009552000 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=00000000000000000000000000000000 XMM01=68a47dbbbb9e7a99ce4b99aa2c94a7aa XMM02=2c67c8bc2e329bc3000000000011a970 XMM03=fb795ef6d65770560000000000121e10 XMM04=aa9d03ed4cd3217f00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131c88 XMM06=014b8ce74c17ea110000000000130af0 XMM07=e042d86d42eb936e0000000000122090 XMM08=c7af6d4c6fdce70a000000000011a9d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000