syzkaller login: [ 34.026468] BUG: Bad rss-counter state mm:0000000004986152 type:MM_FILEPAGES val:33 [ 34.027241] BUG: Bad rss-counter state mm:0000000004986152 type:MM_ANONPAGES val:22 [ 34.059074] ================================================================== [ 34.059813] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.060520] Read of size 8 at addr ffff88800ca83b38 by task sshd/220 [ 34.061076] [ 34.061237] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.061881] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.062594] Call Trace: [ 34.062835] [ 34.063058] dump_stack_lvl+0x91/0xf0 [ 34.063421] print_report+0xcc/0x620 [ 34.063784] ? __virt_addr_valid+0x102/0x340 [ 34.064199] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.064655] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.065098] kasan_report+0xbe/0xf0 [ 34.065446] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.065932] vma_interval_tree_remove+0xc75/0xec0 [ 34.066383] vma_prepare+0xc54/0x11a0 [ 34.066727] __split_vma+0x5af/0x950 [ 34.067069] ? __pfx___split_vma+0x10/0x10 [ 34.067458] ? find_held_lock+0x2c/0x110 [ 34.067836] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.068239] ? lock_is_held_type+0x9f/0x120 [ 34.068634] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.069098] ? mtree_range_walk+0x632/0x900 [ 34.069500] ? mas_walk+0x5c7/0x7c0 [ 34.069846] do_vmi_munmap+0x1f1/0x2b0 [ 34.070226] mmap_region+0x1f9/0x2660 [ 34.070791] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.071163] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.071680] ? __pfx_lock_acquire+0x10/0x10 [ 34.072076] ? __pfx_mmap_region+0x10/0x10 [ 34.072465] ? security_mmap_addr+0x7d/0xa0 [ 34.072863] ? get_unmapped_area+0x1f5/0x3f0 [ 34.073252] do_mmap+0x854/0xf00 [ 34.073570] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.073955] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.074362] ksys_mmap_pgoff+0x3af/0x500 [ 34.074738] do_syscall_64+0x3f/0x90 [ 34.075102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.075568] RIP: 0033:0x7f083a379d82 [ 34.075905] 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 [ 34.077454] RSP: 002b:00007fff74d16e58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.078141] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f083a379d82 [ 34.078760] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f08397b3000 [ 34.079372] RBP: 00007f08397b3000 R08: 0000000000000009 R09: 0000000000001000 [ 34.079996] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d59aa0b20 [ 34.080615] R13: 00007fff74d16e70 R14: 00007fff74d16ea0 R15: 00007fff74d17200 [ 34.081255] [ 34.081474] [ 34.081632] Allocated by task 213: [ 34.081973] kasan_save_stack+0x22/0x50 [ 34.082347] kasan_set_track+0x25/0x30 [ 34.082715] __kasan_slab_alloc+0x59/0x70 [ 34.083101] kmem_cache_alloc+0x16b/0x370 [ 34.083476] vm_area_dup+0x20/0x160 [ 34.083803] __split_vma+0x170/0x950 [ 34.084142] split_vma+0xc6/0x110 [ 34.084459] mprotect_fixup+0x8d2/0xb30 [ 34.084842] do_mprotect_pkey+0x87e/0xd40 [ 34.085223] __x64_sys_mprotect+0x78/0xc0 [ 34.085615] do_syscall_64+0x3f/0x90 [ 34.085977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.086454] [ 34.086611] Freed by task 203: [ 34.086910] kasan_save_stack+0x22/0x50 [ 34.087271] kasan_set_track+0x25/0x30 [ 34.087616] kasan_save_free_info+0x2b/0x50 [ 34.088001] __kasan_slab_free+0x10a/0x190 [ 34.088376] kmem_cache_free+0x10d/0x4d0 [ 34.088745] rcu_core+0x8c8/0x2860 [ 34.089068] __do_softirq+0x1b7/0x7d4 [ 34.089407] [ 34.089557] Last potentially related work creation: [ 34.089999] kasan_save_stack+0x22/0x50 [ 34.090370] __kasan_record_aux_stack+0x8e/0xa0 [ 34.090779] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.091253] remove_vma+0x139/0x170 [ 34.091585] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.091992] do_vmi_munmap+0x1f1/0x2b0 [ 34.092343] __vm_munmap+0x138/0x3a0 [ 34.092678] __x64_sys_munmap+0x59/0x80 [ 34.093039] do_syscall_64+0x3f/0x90 [ 34.093390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.093886] [ 34.094042] The buggy address belongs to the object at ffff88800ca83ae0 [ 34.094042] which belongs to the cache vm_area_struct of size 168 [ 34.095146] The buggy address is located 88 bytes inside of [ 34.095146] freed 168-byte region [ffff88800ca83ae0, ffff88800ca83b88) [ 34.096167] [ 34.096318] The buggy address belongs to the physical page: [ 34.096794] page:00000000aca19639 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca83 [ 34.097590] memcg:ffff88800d279401 [ 34.097918] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.098376] page_type: 0xffffffff() [ 34.098698] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.099381] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d279401 [ 34.100049] page dumped because: kasan: bad access detected [ 34.100531] [ 34.100686] Memory state around the buggy address: [ 34.101124] ffff88800ca83a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.101751] ffff88800ca83a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 34.102423] >ffff88800ca83b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.103037] ^ [ 34.103479] ffff88800ca83b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.104124] ffff88800ca83c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.104755] ================================================================== [ 34.105717] Disabling lock debugging due to kernel taint [ 35.632915] BUG: Bad rss-counter state mm:000000003f42decc type:MM_FILEPAGES val:33 [ 35.633646] BUG: Bad rss-counter state mm:000000003f42decc type:MM_ANONPAGES val:22 [ 35.991961] BUG: Bad rss-counter state mm:0000000013feb938 type:MM_FILEPAGES val:33 [ 35.992701] BUG: Bad rss-counter state mm:0000000013feb938 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23711' (ECDSA) to the list of known hosts. 2023/06/20 09:05:21 fuzzer started 2023/06/20 09:05:21 dialing manager at localhost:44161 2023/06/20 09:05:21 checking machine... 2023/06/20 09:05:21 checking revisions... [ 36.568119] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:05:21 testing simple program... [ 36.610437] cgroup: Unknown subsys name 'net' [ 36.645269] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:05:18 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000002 RCX=ffffffff81164e4d RDX=000000000000164e RSI=000000000000164e RDI=ffffffff864ed4f8 RBP=ffff88806ce09a78 RSP=ffff88806ce099b0 R8 =0000000000000000 R9 =ffff88806ce09a60 R10=0000000000038001 R11=0000000000007035 R12=ffff88806ce09a80 R13=ffff88806ce09a68 R14=ffff88806ce09a61 R15=ffff88806ce09a20 RIP=ffffffff811307c2 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 00007f8d26804900 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=000055f555c43318 CR3=000000000d958000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=01f61ec951ec4f8700000000000ae988 XMM05=273f275d3e6590b30000000000134850 XMM06=9da2fef148066d2500000000001338f8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888008c44000 RCX=0000000000000000 RDX=1ffff110011888ee RSI=ffffffff818942b0 RDI=ffff888008c44770 RBP=ffff888008c28768 RSP=ffff8880193d7900 R8 =0000000000000003 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000081 R13=ffffffff856f0b20 R14=ffff888008c28790 R15=ffff888008c2876a RIP=ffffffff8189431d 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 00007f301a8a6900 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=00007f301ae5b650 CR3=0000000016cfe000 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=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