syzkaller login: [ 28.594661] BUG: Bad rss-counter state mm:00000000e5850afc type:MM_FILEPAGES val:33 [ 28.595276] BUG: Bad rss-counter state mm:00000000e5850afc type:MM_ANONPAGES val:22 [ 28.651102] sshd (217) used greatest stack depth: 24128 bytes left [ 28.808240] ================================================================== [ 28.809340] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.810869] Read of size 8 at addr ffff88800d3eaa50 by task sshd/222 [ 28.811971] [ 28.812225] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.813148] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.814234] Call Trace: [ 28.814589] [ 28.814955] dump_stack_lvl+0x91/0xf0 [ 28.815632] print_report+0xcc/0x620 [ 28.816267] ? __virt_addr_valid+0x102/0x340 [ 28.816999] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.817817] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.818636] kasan_report+0xbe/0xf0 [ 28.819294] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.820085] vma_interval_tree_remove+0xc75/0xec0 [ 28.820861] vma_prepare+0xc54/0x11a0 [ 28.821445] __split_vma+0x5af/0x950 [ 28.821941] ? __pfx___split_vma+0x10/0x10 [ 28.822497] ? find_held_lock+0x2c/0x110 [ 28.823128] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.823753] ? lock_is_held_type+0x9f/0x120 [ 28.824295] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.824930] ? mtree_range_walk+0x632/0x900 [ 28.825543] ? mas_walk+0x5c7/0x7c0 [ 28.826081] do_vmi_munmap+0x1f1/0x2b0 [ 28.826621] mmap_region+0x1f9/0x2660 [ 28.827122] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.827671] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.828452] ? __pfx_lock_acquire+0x10/0x10 [ 28.829020] ? __pfx_mmap_region+0x10/0x10 [ 28.829557] ? security_mmap_addr+0x7d/0xa0 [ 28.830120] ? get_unmapped_area+0x1f5/0x3f0 [ 28.830696] do_mmap+0x854/0xf00 [ 28.831225] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.831739] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.832302] ksys_mmap_pgoff+0x3af/0x500 [ 28.832835] do_syscall_64+0x3f/0x90 [ 28.833361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.834118] RIP: 0033:0x7fdedbc12d82 [ 28.834610] 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 [ 28.836900] RSP: 002b:00007fff82886ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.837857] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdedbc12d82 [ 28.838806] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdedb04c000 [ 28.839713] RBP: 00007fdedb04c000 R08: 0000000000000009 R09: 0000000000001000 [ 28.840596] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d33e59ec0 [ 28.841533] R13: 00007fff82886b00 R14: 00007fff82886b30 R15: 00007fff82886e90 [ 28.842437] [ 28.842765] [ 28.842984] Allocated by task 212: [ 28.843442] kasan_save_stack+0x22/0x50 [ 28.844047] kasan_set_track+0x25/0x30 [ 28.844548] __kasan_slab_alloc+0x59/0x70 [ 28.845084] kmem_cache_alloc+0x16b/0x370 [ 28.845610] vm_area_dup+0x20/0x160 [ 28.846105] __split_vma+0x170/0x950 [ 28.846639] split_vma+0xc6/0x110 [ 28.847126] mprotect_fixup+0x8d2/0xb30 [ 28.847647] do_mprotect_pkey+0x87e/0xd40 [ 28.848197] __x64_sys_mprotect+0x78/0xc0 [ 28.848733] do_syscall_64+0x3f/0x90 [ 28.849311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.849977] [ 28.850195] Freed by task 19: [ 28.850582] kasan_save_stack+0x22/0x50 [ 28.851220] kasan_set_track+0x25/0x30 [ 28.851815] kasan_save_free_info+0x2b/0x50 [ 28.852384] __kasan_slab_free+0x10a/0x190 [ 28.852936] kmem_cache_free+0x10d/0x4d0 [ 28.853467] rcu_core+0x8c8/0x2860 [ 28.853957] __do_softirq+0x1b7/0x7d4 [ 28.854496] [ 28.854739] Last potentially related work creation: [ 28.855352] kasan_save_stack+0x22/0x50 [ 28.855899] __kasan_record_aux_stack+0x8e/0xa0 [ 28.856493] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.857228] remove_vma+0x139/0x170 [ 28.857697] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.858259] do_vmi_munmap+0x1f1/0x2b0 [ 28.858773] __vm_munmap+0x138/0x3a0 [ 28.859252] __x64_sys_munmap+0x59/0x80 [ 28.859778] do_syscall_64+0x3f/0x90 [ 28.860257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.860919] [ 28.861134] The buggy address belongs to the object at ffff88800d3ea9f8 [ 28.861134] which belongs to the cache vm_area_struct of size 168 [ 28.862667] The buggy address is located 88 bytes inside of [ 28.862667] freed 168-byte region [ffff88800d3ea9f8, ffff88800d3eaaa0) [ 28.864187] [ 28.864406] The buggy address belongs to the physical page: [ 28.865104] page:00000000f2b46562 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd3ea [ 28.866299] memcg:ffff88800d3c9201 [ 28.866743] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.867490] page_type: 0xffffffff() [ 28.868029] raw: 0100000000000200 ffff8880087a0c80 ffffea0000369900 dead000000000005 [ 28.869008] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3c9201 [ 28.869965] page dumped because: kasan: bad access detected [ 28.870715] [ 28.870954] Memory state around the buggy address: [ 28.871555] ffff88800d3ea900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.872450] ffff88800d3ea980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 28.873411] >ffff88800d3eaa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.874304] ^ [ 28.875049] ffff88800d3eaa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 28.876032] ffff88800d3eab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.876927] ================================================================== [ 28.877896] Disabling lock debugging due to kernel taint [ 31.239111] BUG: Bad rss-counter state mm:0000000026eeba3f type:MM_FILEPAGES val:33 [ 31.240610] BUG: Bad rss-counter state mm:0000000026eeba3f type:MM_ANONPAGES val:22 [ 31.693528] BUG: Bad rss-counter state mm:00000000b0f8a67a type:MM_FILEPAGES val:33 [ 31.694475] BUG: Bad rss-counter state mm:00000000b0f8a67a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18342' (ECDSA) to the list of known hosts. 2023/06/21 01:56:18 fuzzer started 2023/06/21 01:56:19 dialing manager at localhost:36067 2023/06/21 01:56:19 checking machine... 2023/06/21 01:56:19 checking revisions... [ 32.431387] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:56:19 testing simple program... [ 32.474144] cgroup: Unknown subsys name 'net' [ 32.511714] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:56:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652b60 RCX=0000000000000100 RDX=ffff88800c4451c0 RSI=ffffffff814c8467 RDI=ffffffff85652b60 RBP=00007f275bc1120c RSP=ffff88806ce09a20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f275bc1120c R13=0000000000000000 R14=ffff88800c4451c0 R15=ffff888019dbd958 RIP=ffffffff8135bd40 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 00007f275b71e900 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=00007f275bcd3650 CR3=00000000100d6000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbfc32 RBX=ffffffff85dfe190 RCX=ffffffff8180ce88 RDX=0000000000000000 RSI=ffffffff86139066 RDI=ffffffff85dfe158 RBP=ffffffff85dfe180 RSP=ffff8880158bf640 R8 =ffffffff86139066 R9 =ffff8880158bf738 R10=0000000000038001 R11=0000000000020de5 R12=ffffffff85dfe1a4 R13=ffffffff85dfe158 R14=ffffffff85dfe17c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007f0c99521900 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=00007f0c9894e0e0 CR3=000000001039e000 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=1eded518d06edfd200000000000ae988 XMM05=038f205279ee63700000000000132fd0 XMM06=4fda316b135da52b0000000000131dc0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000