syzkaller login: [ 50.247798] BUG: Bad rss-counter state mm:00000000bae03d2e type:MM_FILEPAGES val:33 [ 50.249002] BUG: Bad rss-counter state mm:00000000bae03d2e type:MM_ANONPAGES val:22 [ 50.289053] ================================================================== [ 50.290147] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.291074] Read of size 8 at addr ffff88800f740a50 by task sshd/220 [ 50.292051] [ 50.292272] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.293283] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.294378] Call Trace: [ 50.294696] [ 50.295003] dump_stack_lvl+0x91/0xf0 [ 50.295580] print_report+0xcc/0x620 [ 50.296167] ? __virt_addr_valid+0x102/0x340 [ 50.296793] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.297411] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.298033] kasan_report+0xbe/0xf0 [ 50.298515] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.299139] vma_interval_tree_remove+0xc75/0xec0 [ 50.299750] vma_prepare+0xc54/0x11a0 [ 50.300230] __split_vma+0x5af/0x950 [ 50.300701] ? __pfx___split_vma+0x10/0x10 [ 50.301236] ? find_held_lock+0x2c/0x110 [ 50.301762] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.302334] ? lock_is_held_type+0x9f/0x120 [ 50.302870] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.303477] ? mtree_range_walk+0x632/0x900 [ 50.304050] ? mas_walk+0x5c7/0x7c0 [ 50.304531] do_vmi_munmap+0x1f1/0x2b0 [ 50.305032] mmap_region+0x1f9/0x2660 [ 50.305520] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.306046] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.306877] ? __pfx_lock_acquire+0x10/0x10 [ 50.307513] ? __pfx_mmap_region+0x10/0x10 [ 50.308177] ? security_mmap_addr+0x7d/0xa0 [ 50.308825] ? get_unmapped_area+0x1f5/0x3f0 [ 50.309495] do_mmap+0x854/0xf00 [ 50.310030] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.310624] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.311305] ksys_mmap_pgoff+0x3af/0x500 [ 50.311947] do_syscall_64+0x3f/0x90 [ 50.312525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.313316] RIP: 0033:0x7f2a565f2d82 [ 50.313875] 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 [ 50.316458] RSP: 002b:00007ffefe424cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.317541] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2a565f2d82 [ 50.318565] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2a55a2c000 [ 50.319604] RBP: 00007f2a55a2c000 R08: 0000000000000009 R09: 0000000000001000 [ 50.320636] R10: 0000000000000812 R11: 0000000000000206 R12: 00005571fab11ec0 [ 50.321668] R13: 00007ffefe424cf0 R14: 00007ffefe424d20 R15: 00007ffefe425080 [ 50.322722] [ 50.323075] [ 50.323329] Allocated by task 213: [ 50.323868] kasan_save_stack+0x22/0x50 [ 50.324475] kasan_set_track+0x25/0x30 [ 50.325071] __kasan_slab_alloc+0x59/0x70 [ 50.325690] kmem_cache_alloc+0x16b/0x370 [ 50.326308] vm_area_dup+0x20/0x160 [ 50.326860] __split_vma+0x170/0x950 [ 50.327413] split_vma+0xc6/0x110 [ 50.327950] mprotect_fixup+0x8d2/0xb30 [ 50.328546] do_mprotect_pkey+0x87e/0xd40 [ 50.329172] __x64_sys_mprotect+0x78/0xc0 [ 50.329806] do_syscall_64+0x3f/0x90 [ 50.330462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.331233] [ 50.331495] Freed by task 203: [ 50.332002] kasan_save_stack+0x22/0x50 [ 50.332604] kasan_set_track+0x25/0x30 [ 50.333196] kasan_save_free_info+0x2b/0x50 [ 50.333835] __kasan_slab_free+0x10a/0x190 [ 50.334475] kmem_cache_free+0x10d/0x4d0 [ 50.335074] rcu_core+0x8c8/0x2860 [ 50.335607] __do_softirq+0x1b7/0x7d4 [ 50.336177] [ 50.336433] Last potentially related work creation: [ 50.337152] kasan_save_stack+0x22/0x50 [ 50.337755] __kasan_record_aux_stack+0x8e/0xa0 [ 50.338459] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.339239] remove_vma+0x139/0x170 [ 50.339798] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.340478] do_vmi_munmap+0x1f1/0x2b0 [ 50.341070] __vm_munmap+0x138/0x3a0 [ 50.341625] __x64_sys_munmap+0x59/0x80 [ 50.342222] do_syscall_64+0x3f/0x90 [ 50.342802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.343568] [ 50.343853] Second to last potentially related work creation: [ 50.344677] kasan_save_stack+0x22/0x50 [ 50.345281] __kasan_record_aux_stack+0x8e/0xa0 [ 50.345970] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.346742] remove_vma+0x139/0x170 [ 50.347294] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.347982] do_vmi_munmap+0x1f1/0x2b0 [ 50.348568] mmap_region+0x1f9/0x2660 [ 50.349152] do_mmap+0x854/0xf00 [ 50.349674] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.350264] ksys_mmap_pgoff+0x3af/0x500 [ 50.350873] do_syscall_64+0x3f/0x90 [ 50.351439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.352225] [ 50.352485] The buggy address belongs to the object at ffff88800f7409f8 [ 50.352485] which belongs to the cache vm_area_struct of size 168 [ 50.354290] The buggy address is located 88 bytes inside of [ 50.354290] freed 168-byte region [ffff88800f7409f8, ffff88800f740aa0) [ 50.356020] [ 50.356277] The buggy address belongs to the physical page: [ 50.357090] page:0000000085efec4f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf740 [ 50.358406] memcg:ffff88800f741001 [ 50.358928] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.359711] page_type: 0xffffffff() [ 50.360275] raw: 0100000000000200 ffff88800879fc80 ffffea0000332bc0 dead000000000004 [ 50.361398] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f741001 [ 50.362499] page dumped because: kasan: bad access detected [ 50.363303] [ 50.363560] Memory state around the buggy address: [ 50.364274] ffff88800f740900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.365322] ffff88800f740980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 50.366376] >ffff88800f740a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.367414] ^ [ 50.368285] ffff88800f740a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 50.369339] ffff88800f740b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.370374] ================================================================== [ 50.371611] Disabling lock debugging due to kernel taint [ 52.190108] BUG: Bad rss-counter state mm:000000003c45e4b5 type:MM_FILEPAGES val:33 [ 52.190945] BUG: Bad rss-counter state mm:000000003c45e4b5 type:MM_ANONPAGES val:22 [ 52.714732] BUG: Bad rss-counter state mm:000000009e126d71 type:MM_FILEPAGES val:33 [ 52.716112] BUG: Bad rss-counter state mm:000000009e126d71 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64028' (ECDSA) to the list of known hosts. 2023/06/19 14:49:55 fuzzer started 2023/06/19 14:49:55 dialing manager at localhost:44161 2023/06/19 14:49:56 checking machine... 2023/06/19 14:49:56 checking revisions... [ 53.470817] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:49:56 testing simple program... [ 53.501984] cgroup: Unknown subsys name 'net' [ 53.538464] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:49:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000055c57e1615a0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000008000 RDI=000055c57e13d350 RBP=0000000000000000 RSP=00007fff60335fe8 R8 =0000000000008000 R9 =0000000000000000 R10=000055c57e153770 R11=0000000000000000 R12=000000000000000a R13=000055c57e13d350 R14=0000000000000000 R15=0000000000000001 RIP=00007f21f22375e2 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f21f2295900 00000000 00000000 GS =0000 0000000000000000 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=00007f21f284d0b0 CR3=000000000961e000 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=1ffff110019b4839 RBX=ffff88800cda4198 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800cda41c8 RBP=ffff88800ce02570 RSP=ffff88806cf09da8 R8 =0000000000000001 R9 =ffffed100d9e13a9 R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88800cde2b40 R14=ffffffff811f7e84 R15=ffff88800e30b580 RIP=ffffffff81846362 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 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=00007fbec6a24000 CR3=000000000da3e000 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=2035353a39343a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a39343a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000