syzkaller login: [ 37.832934] BUG: Bad rss-counter state mm:00000000b974846e type:MM_FILEPAGES val:33 [ 37.834084] BUG: Bad rss-counter state mm:00000000b974846e type:MM_ANONPAGES val:22 [ 38.011799] ================================================================== [ 38.012807] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.013817] Read of size 8 at addr ffff8880158b05c8 by task sshd/220 [ 38.014761] [ 38.014999] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.015922] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.016989] Call Trace: [ 38.017332] [ 38.017637] dump_stack_lvl+0x91/0xf0 [ 38.018172] print_report+0xcc/0x620 [ 38.018688] ? __virt_addr_valid+0x102/0x340 [ 38.019281] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.019953] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.020616] kasan_report+0xbe/0xf0 [ 38.021126] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.021798] vma_interval_tree_remove+0xc75/0xec0 [ 38.022475] vma_prepare+0xc54/0x11a0 [ 38.023008] __split_vma+0x5af/0x950 [ 38.023533] ? __pfx___split_vma+0x10/0x10 [ 38.024118] ? find_held_lock+0x2c/0x110 [ 38.024693] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.025320] ? lock_is_held_type+0x9f/0x120 [ 38.025935] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.026611] ? mtree_range_walk+0x632/0x900 [ 38.027219] ? mas_walk+0x5c7/0x7c0 [ 38.027742] do_vmi_munmap+0x1f1/0x2b0 [ 38.028285] mmap_region+0x1f9/0x2660 [ 38.028817] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.029382] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.030190] ? __pfx_lock_acquire+0x10/0x10 [ 38.030780] ? __pfx_mmap_region+0x10/0x10 [ 38.031366] ? security_mmap_addr+0x7d/0xa0 [ 38.031951] ? get_unmapped_area+0x1f5/0x3f0 [ 38.032564] do_mmap+0x854/0xf00 [ 38.033047] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.033598] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.034225] ksys_mmap_pgoff+0x3af/0x500 [ 38.034787] do_syscall_64+0x3f/0x90 [ 38.035315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.036035] RIP: 0033:0x7f6075275d82 [ 38.036537] 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 [ 38.038933] RSP: 002b:00007fffd0227c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.039936] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6075275d82 [ 38.040877] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f60746af000 [ 38.041818] RBP: 00007f60746af000 R08: 0000000000000009 R09: 0000000000001000 [ 38.042764] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564122671b20 [ 38.043703] R13: 00007fffd0227c30 R14: 00007fffd0227c60 R15: 00007fffd0227fc0 [ 38.044652] [ 38.044975] [ 38.045211] Allocated by task 213: [ 38.045686] kasan_save_stack+0x22/0x50 [ 38.046258] kasan_set_track+0x25/0x30 [ 38.046809] __kasan_slab_alloc+0x59/0x70 [ 38.047386] kmem_cache_alloc+0x16b/0x370 [ 38.047956] vm_area_dup+0x20/0x160 [ 38.048459] __split_vma+0x170/0x950 [ 38.048976] split_vma+0xc6/0x110 [ 38.049462] mprotect_fixup+0x8d2/0xb30 [ 38.050024] do_mprotect_pkey+0x87e/0xd40 [ 38.050604] __x64_sys_mprotect+0x78/0xc0 [ 38.051180] do_syscall_64+0x3f/0x90 [ 38.051717] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.052404] [ 38.052633] Freed by task 203: [ 38.053056] kasan_save_stack+0x22/0x50 [ 38.053595] kasan_set_track+0x25/0x30 [ 38.054141] kasan_save_free_info+0x2b/0x50 [ 38.054714] __kasan_slab_free+0x10a/0x190 [ 38.055282] kmem_cache_free+0x10d/0x4d0 [ 38.055826] rcu_core+0x8c8/0x2860 [ 38.056301] __do_softirq+0x1b7/0x7d4 [ 38.056823] [ 38.057051] Last potentially related work creation: [ 38.057683] kasan_save_stack+0x22/0x50 [ 38.058234] __kasan_record_aux_stack+0x8e/0xa0 [ 38.058846] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.059532] remove_vma+0x139/0x170 [ 38.060012] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.060607] do_vmi_munmap+0x1f1/0x2b0 [ 38.061135] __vm_munmap+0x138/0x3a0 [ 38.061652] __x64_sys_munmap+0x59/0x80 [ 38.062201] do_syscall_64+0x3f/0x90 [ 38.062718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.063406] [ 38.063642] The buggy address belongs to the object at ffff8880158b0570 [ 38.063642] which belongs to the cache vm_area_struct of size 168 [ 38.065220] The buggy address is located 88 bytes inside of [ 38.065220] freed 168-byte region [ffff8880158b0570, ffff8880158b0618) [ 38.066757] [ 38.067012] The buggy address belongs to the physical page: [ 38.067732] page:00000000b46b6117 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x158b0 [ 38.068898] memcg:ffff88800cb66201 [ 38.069352] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.070046] page_type: 0xffffffff() [ 38.070522] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.071499] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb66201 [ 38.072465] page dumped because: kasan: bad access detected [ 38.073164] [ 38.073393] Memory state around the buggy address: [ 38.074027] ffff8880158b0480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.074940] ffff8880158b0500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 38.075847] >ffff8880158b0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.076754] ^ [ 38.077455] ffff8880158b0600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.078368] ffff8880158b0680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.079267] ================================================================== [ 38.080329] Disabling lock debugging due to kernel taint [ 40.059742] BUG: Bad rss-counter state mm:0000000012a3c680 type:MM_FILEPAGES val:33 [ 40.060961] BUG: Bad rss-counter state mm:0000000012a3c680 type:MM_ANONPAGES val:22 [ 40.520505] BUG: Bad rss-counter state mm:000000007220971f type:MM_FILEPAGES val:33 [ 40.521667] BUG: Bad rss-counter state mm:000000007220971f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41369' (ECDSA) to the list of known hosts. 2023/06/20 01:36:13 fuzzer started 2023/06/20 01:36:13 dialing manager at localhost:44161 2023/06/20 01:36:13 checking machine... 2023/06/20 01:36:13 checking revisions... [ 41.261130] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:36:13 testing simple program... [ 41.314875] cgroup: Unknown subsys name 'net' [ 41.354976] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:36:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000607f92e12b10 RCX=1ffffffff0ba7a02 RDX=1ffff11002b2c27e RSI=000000096d7b34df RDI=ffff8880159613f0 RBP=ffff888016fe7c88 RSP=ffff888016fe7b58 R8 =ffff888019af3780 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88806ce39500 R13=ffff888015960000 R14=ffff888008d71fe8 R15=ffff888008d71b40 RIP=ffffffff845180b2 RFL=00000046 [---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 00007f15b8843900 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=00007f15b8dfb0b0 CR3=000000001c894000 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=0000000080000000 RBX=000000000000006c RCX=ffffffff8189ef00 RDX=ffff88801031b680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888010277c48 RSP=ffff888010277998 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800c1be468 R13=0000000000000000 R14=ffff888010277c80 R15=0000000000000002 RIP=ffffffff814c01e1 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 00007f41ac3ec900 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=00007f41ab86ce90 CR3=000000000cb68000 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=3ec2be4efeb6c5bf00000000000ae988 XMM05=dd558f5aac6e75970000000000135120 XMM06=19e9129bd510f2350000000000133fb8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000