syzkaller login: [ 28.792081] BUG: Bad rss-counter state mm:000000004743616c type:MM_FILEPAGES val:33 [ 28.793582] BUG: Bad rss-counter state mm:000000004743616c type:MM_ANONPAGES val:22 [ 28.943914] ================================================================== [ 28.944870] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.945873] Read of size 8 at addr ffff88800df79b38 by task sshd/220 [ 28.946678] [ 28.946906] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.947974] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.948987] Call Trace: [ 28.949336] [ 28.949634] dump_stack_lvl+0x91/0xf0 [ 28.950151] print_report+0xcc/0x620 [ 28.950655] ? __virt_addr_valid+0x102/0x340 [ 28.951229] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.951878] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.952522] kasan_report+0xbe/0xf0 [ 28.953019] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.953684] vma_interval_tree_remove+0xc75/0xec0 [ 28.954319] vma_prepare+0xc54/0x11a0 [ 28.954825] __split_vma+0x5af/0x950 [ 28.955315] ? __pfx___split_vma+0x10/0x10 [ 28.955870] ? find_held_lock+0x2c/0x110 [ 28.956407] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.957003] ? lock_is_held_type+0x9f/0x120 [ 28.957590] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.958219] ? mtree_range_walk+0x632/0x900 [ 28.958790] ? mas_walk+0x5c7/0x7c0 [ 28.959284] do_vmi_munmap+0x1f1/0x2b0 [ 28.959801] mmap_region+0x1f9/0x2660 [ 28.960306] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.960832] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.961582] ? __pfx_lock_acquire+0x10/0x10 [ 28.962144] ? __pfx_mmap_region+0x10/0x10 [ 28.962696] ? security_mmap_addr+0x7d/0xa0 [ 28.963262] ? get_unmapped_area+0x1f5/0x3f0 [ 28.963839] do_mmap+0x854/0xf00 [ 28.964296] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.964807] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.965413] ksys_mmap_pgoff+0x3af/0x500 [ 28.965942] do_syscall_64+0x3f/0x90 [ 28.966444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.967120] RIP: 0033:0x7fa8d9b0ad82 [ 28.967598] 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 [ 28.969805] RSP: 002b:00007fff8ee4f8b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.970749] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa8d9b0ad82 [ 28.971636] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa8d8f44000 [ 28.972513] RBP: 00007fa8d8f44000 R08: 0000000000000009 R09: 0000000000001000 [ 28.973407] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560e42d99b20 [ 28.974289] R13: 00007fff8ee4f8d0 R14: 00007fff8ee4f900 R15: 00007fff8ee4fc60 [ 28.975187] [ 28.975489] [ 28.975709] Allocated by task 212: [ 28.976169] kasan_save_stack+0x22/0x50 [ 28.976690] kasan_set_track+0x25/0x30 [ 28.977237] __kasan_slab_alloc+0x59/0x70 [ 28.977797] kmem_cache_alloc+0x16b/0x370 [ 28.978334] vm_area_dup+0x20/0x160 [ 28.978809] __split_vma+0x170/0x950 [ 28.979301] split_vma+0xc6/0x110 [ 28.979753] mprotect_fixup+0x8d2/0xb30 [ 28.980277] do_mprotect_pkey+0x87e/0xd40 [ 28.980810] __x64_sys_mprotect+0x78/0xc0 [ 28.981367] do_syscall_64+0x3f/0x90 [ 28.981857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.982531] [ 28.982758] Freed by task 212: [ 28.983173] kasan_save_stack+0x22/0x50 [ 28.983697] kasan_set_track+0x25/0x30 [ 28.984219] kasan_save_free_info+0x2b/0x50 [ 28.984782] __kasan_slab_free+0x10a/0x190 [ 28.985356] kmem_cache_free+0x10d/0x4d0 [ 28.985892] rcu_core+0x8c8/0x2860 [ 28.986361] __do_softirq+0x1b7/0x7d4 [ 28.986856] [ 28.987079] Last potentially related work creation: [ 28.987692] kasan_save_stack+0x22/0x50 [ 28.988216] __kasan_record_aux_stack+0x8e/0xa0 [ 28.988896] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.989577] remove_vma+0x139/0x170 [ 28.990049] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.990629] do_vmi_munmap+0x1f1/0x2b0 [ 28.991138] __vm_munmap+0x138/0x3a0 [ 28.991634] __x64_sys_munmap+0x59/0x80 [ 28.992160] do_syscall_64+0x3f/0x90 [ 28.992660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.993357] [ 28.993583] The buggy address belongs to the object at ffff88800df79ae0 [ 28.993583] which belongs to the cache vm_area_struct of size 168 [ 28.995146] The buggy address is located 88 bytes inside of [ 28.995146] freed 168-byte region [ffff88800df79ae0, ffff88800df79b88) [ 28.996616] [ 28.996836] The buggy address belongs to the physical page: [ 28.997536] page:00000000b94f0f1f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf79 [ 28.998727] memcg:ffff88800dfa6d01 [ 28.999191] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.999952] page_type: 0xffffffff() [ 29.000448] raw: 0100000000000200 ffff8880087a0c80 ffffea000025ec80 dead000000000005 [ 29.001458] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfa6d01 [ 29.002432] page dumped because: kasan: bad access detected [ 29.003141] [ 29.003370] Memory state around the buggy address: [ 29.003980] ffff88800df79a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.004894] ffff88800df79a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 29.005816] >ffff88800df79b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.006736] ^ [ 29.007385] ffff88800df79b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 29.008298] ffff88800df79c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 29.009232] ================================================================== [ 29.010305] Disabling lock debugging due to kernel taint [ 31.623958] BUG: Bad rss-counter state mm:0000000090d22769 type:MM_FILEPAGES val:33 [ 31.625047] BUG: Bad rss-counter state mm:0000000090d22769 type:MM_ANONPAGES val:22 [ 32.114064] BUG: Bad rss-counter state mm:00000000350d60a1 type:MM_FILEPAGES val:33 [ 32.115316] BUG: Bad rss-counter state mm:00000000350d60a1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20991' (ECDSA) to the list of known hosts. 2023/06/20 16:12:20 fuzzer started 2023/06/20 16:12:20 dialing manager at localhost:36067 2023/06/20 16:12:20 checking machine... 2023/06/20 16:12:20 checking revisions... [ 32.833635] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:12:20 testing simple program... [ 32.882403] cgroup: Unknown subsys name 'net' [ 32.931908] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:12:20 Registers: info registers vcpu 0 RAX=0000000000000040 RBX=ffff888019167950 RCX=0000000000000001 RDX=1ffff1100322cf40 RSI=ffffffff8186d48e RDI=ffff88801916795c RBP=ffff888019167a00 RSP=ffff888019167868 R8 =0000000000000001 R9 =ffff8880191678c8 R10=0000000000038001 R11=00000000000229d9 R12=ffff888019167950 R13=0000000000000000 R14=ffff88800c92d1c0 R15=0000000000092cc0 RIP=ffffffff813ad553 RFL=00000287 [--S--PC] 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 00007f3c02fe2900 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=00007f3c03597650 CR3=0000000015cae000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008df7e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011befd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fffecfb37e8 CR3=000000001816e000 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=2039313a32313a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a32313a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000