syzkaller login: [ 30.883544] BUG: Bad rss-counter state mm:000000008566a9bf type:MM_FILEPAGES val:33 [ 30.884787] BUG: Bad rss-counter state mm:000000008566a9bf type:MM_ANONPAGES val:22 [ 31.065709] ================================================================== [ 31.066687] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.067685] Read of size 8 at addr ffff88801a23c228 by task sshd/222 [ 31.068573] [ 31.068838] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.069765] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.070829] Call Trace: [ 31.071169] [ 31.071474] dump_stack_lvl+0x91/0xf0 [ 31.072004] print_report+0xcc/0x620 [ 31.072544] ? __virt_addr_valid+0x102/0x340 [ 31.073131] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.073785] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.074441] kasan_report+0xbe/0xf0 [ 31.074965] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.075648] vma_interval_tree_remove+0xc75/0xec0 [ 31.076314] vma_prepare+0xc54/0x11a0 [ 31.076838] __split_vma+0x5af/0x950 [ 31.077358] ? __pfx___split_vma+0x10/0x10 [ 31.077939] ? find_held_lock+0x2c/0x110 [ 31.078509] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.079131] ? lock_is_held_type+0x9f/0x120 [ 31.079726] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.080404] ? mtree_range_walk+0x632/0x900 [ 31.081020] ? mas_walk+0x5c7/0x7c0 [ 31.081553] do_vmi_munmap+0x1f1/0x2b0 [ 31.082098] mmap_region+0x1f9/0x2660 [ 31.082637] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.083195] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.083978] ? __pfx_lock_acquire+0x10/0x10 [ 31.084589] ? __pfx_mmap_region+0x10/0x10 [ 31.085171] ? security_mmap_addr+0x7d/0xa0 [ 31.085761] ? get_unmapped_area+0x1f5/0x3f0 [ 31.086368] do_mmap+0x854/0xf00 [ 31.086858] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.087406] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.088021] ksys_mmap_pgoff+0x3af/0x500 [ 31.088584] do_syscall_64+0x3f/0x90 [ 31.089109] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.089826] RIP: 0033:0x7f39796f1d82 [ 31.090327] 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 [ 31.092709] RSP: 002b:00007ffd54fe8718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.093705] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f39796f1d82 [ 31.094634] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3978b2b000 [ 31.095563] RBP: 00007f3978b2b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.096500] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ec1f63dec0 [ 31.097429] R13: 00007ffd54fe8730 R14: 00007ffd54fe8760 R15: 00007ffd54fe8ac0 [ 31.098370] [ 31.098690] [ 31.098924] Allocated by task 213: [ 31.099397] kasan_save_stack+0x22/0x50 [ 31.099948] kasan_set_track+0x25/0x30 [ 31.100502] __kasan_slab_alloc+0x59/0x70 [ 31.101078] kmem_cache_alloc+0x16b/0x370 [ 31.101640] vm_area_dup+0x20/0x160 [ 31.102137] __split_vma+0x170/0x950 [ 31.102646] split_vma+0xc6/0x110 [ 31.103124] mprotect_fixup+0x8d2/0xb30 [ 31.103682] do_mprotect_pkey+0x87e/0xd40 [ 31.104270] __x64_sys_mprotect+0x78/0xc0 [ 31.104843] do_syscall_64+0x3f/0x90 [ 31.105361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.106064] [ 31.106298] Freed by task 110: [ 31.106726] kasan_save_stack+0x22/0x50 [ 31.107278] kasan_set_track+0x25/0x30 [ 31.107819] kasan_save_free_info+0x2b/0x50 [ 31.108412] __kasan_slab_free+0x10a/0x190 [ 31.109001] kmem_cache_free+0x10d/0x4d0 [ 31.109559] rcu_core+0x8c8/0x2860 [ 31.110144] __do_softirq+0x1b7/0x7d4 [ 31.110672] [ 31.110911] Last potentially related work creation: [ 31.111555] kasan_save_stack+0x22/0x50 [ 31.112109] __kasan_record_aux_stack+0x8e/0xa0 [ 31.112764] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.113474] remove_vma+0x139/0x170 [ 31.113976] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.114591] do_vmi_munmap+0x1f1/0x2b0 [ 31.115120] __vm_munmap+0x138/0x3a0 [ 31.115635] __x64_sys_munmap+0x59/0x80 [ 31.116182] do_syscall_64+0x3f/0x90 [ 31.116714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.117427] [ 31.117663] The buggy address belongs to the object at ffff88801a23c1d0 [ 31.117663] which belongs to the cache vm_area_struct of size 168 [ 31.119286] The buggy address is located 88 bytes inside of [ 31.119286] freed 168-byte region [ffff88801a23c1d0, ffff88801a23c278) [ 31.120851] [ 31.121092] The buggy address belongs to the physical page: [ 31.121816] page:00000000cdda4c57 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a23c [ 31.123026] memcg:ffff888016b4f901 [ 31.123495] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.124228] page_type: 0xffffffff() [ 31.124730] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.125747] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b4f901 [ 31.126754] page dumped because: kasan: bad access detected [ 31.127484] [ 31.127719] Memory state around the buggy address: [ 31.128368] ffff88801a23c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.129323] ffff88801a23c180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.130277] >ffff88801a23c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.131217] ^ [ 31.131827] ffff88801a23c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.132781] ffff88801a23c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.133718] ================================================================== [ 31.134757] Disabling lock debugging due to kernel taint [ 33.328441] BUG: Bad rss-counter state mm:00000000d764c848 type:MM_FILEPAGES val:33 [ 33.329664] BUG: Bad rss-counter state mm:00000000d764c848 type:MM_ANONPAGES val:22 [ 33.861443] BUG: Bad rss-counter state mm:00000000a47328e4 type:MM_FILEPAGES val:33 [ 33.862674] BUG: Bad rss-counter state mm:00000000a47328e4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16376' (ECDSA) to the list of known hosts. 2023/06/20 22:44:06 fuzzer started 2023/06/20 22:44:06 dialing manager at localhost:36067 2023/06/20 22:44:06 checking machine... 2023/06/20 22:44:06 checking revisions... [ 34.565363] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:44:06 testing simple program... [ 34.609814] cgroup: Unknown subsys name 'net' [ 34.653171] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:44:06 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000003 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88806ce09ee8 RBP=0000000000000004 RSP=ffff88806ce09e58 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88806ce09ee8 R14=ffff88806ce35000 R15=ffff8880168f71b0 RIP=ffffffff8137fc7f 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 00007f01a0876700 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=00007ffd39ae6aa8 CR3=0000000015994000 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=2036303a34343a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a34343a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800c783720 RBX=ffff88800c783720 RCX=00000000000d000c RDX=00000000800d000c RSI=ffff88800c783720 RDI=ffff88800844e900 RBP=ffff88800f66f9d8 RSP=ffff88800f66f950 R8 =00000000000d000c R9 =ffffed1001ecdf18 R10=0000000000000003 R11=00000000000d000c R12=ffff88800844f780 R13=ffff88800844e900 R14=ffffea000031e0c0 R15=00000000800d000c RIP=ffffffff81805e3b RFL=00000042 [---Z---] 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 00007f8d3ebaf900 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=00007f8d3f1670b0 CR3=0000000013e36000 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