syzkaller login: [ 31.148961] BUG: Bad rss-counter state mm:0000000003112255 type:MM_FILEPAGES val:33 [ 31.150638] BUG: Bad rss-counter state mm:0000000003112255 type:MM_ANONPAGES val:22 [ 31.314877] ================================================================== [ 31.316200] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.317530] Read of size 8 at addr ffff88801686f058 by task sshd/219 [ 31.318475] [ 31.318742] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.319806] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.320996] Call Trace: [ 31.321389] [ 31.321734] dump_stack_lvl+0x91/0xf0 [ 31.322324] print_report+0xcc/0x620 [ 31.322794] ? __virt_addr_valid+0x102/0x340 [ 31.323312] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.323896] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.324472] kasan_report+0xbe/0xf0 [ 31.324928] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.325519] vma_interval_tree_remove+0xc75/0xec0 [ 31.326086] vma_prepare+0xc54/0x11a0 [ 31.326571] __split_vma+0x5af/0x950 [ 31.327021] ? __pfx___split_vma+0x10/0x10 [ 31.327521] ? find_held_lock+0x2c/0x110 [ 31.328016] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.328554] ? lock_is_held_type+0x9f/0x120 [ 31.329064] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.329638] ? mtree_range_walk+0x632/0x900 [ 31.330158] ? mas_walk+0x5c7/0x7c0 [ 31.330616] do_vmi_munmap+0x1f1/0x2b0 [ 31.331091] mmap_region+0x1f9/0x2660 [ 31.331547] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.332036] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.332738] ? __pfx_lock_acquire+0x10/0x10 [ 31.333272] ? __pfx_mmap_region+0x10/0x10 [ 31.333808] ? security_mmap_addr+0x7d/0xa0 [ 31.334334] ? get_unmapped_area+0x1f5/0x3f0 [ 31.334882] do_mmap+0x854/0xf00 [ 31.335318] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.335816] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.336370] ksys_mmap_pgoff+0x3af/0x500 [ 31.336879] do_syscall_64+0x3f/0x90 [ 31.337363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.338006] RIP: 0033:0x7f5a5b0f4d82 [ 31.338483] 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 [ 31.340588] RSP: 002b:00007ffec876d318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.341481] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a5b0f4d82 [ 31.342329] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a5a52e000 [ 31.343165] RBP: 00007f5a5a52e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.344011] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a7d3417ec0 [ 31.344850] R13: 00007ffec876d330 R14: 00007ffec876d360 R15: 00007ffec876d6c0 [ 31.345698] [ 31.345981] [ 31.346190] Allocated by task 212: [ 31.346637] kasan_save_stack+0x22/0x50 [ 31.347130] kasan_set_track+0x25/0x30 [ 31.347620] __kasan_slab_alloc+0x59/0x70 [ 31.348133] kmem_cache_alloc+0x16b/0x370 [ 31.348648] vm_area_dup+0x20/0x160 [ 31.349104] __split_vma+0x170/0x950 [ 31.349564] split_vma+0xc6/0x110 [ 31.349992] mprotect_fixup+0x8d2/0xb30 [ 31.350509] do_mprotect_pkey+0x87e/0xd40 [ 31.351034] __x64_sys_mprotect+0x78/0xc0 [ 31.351547] do_syscall_64+0x3f/0x90 [ 31.352016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.352652] [ 31.352923] Freed by task 212: [ 31.353363] kasan_save_stack+0x22/0x50 [ 31.353869] kasan_set_track+0x25/0x30 [ 31.354376] kasan_save_free_info+0x2b/0x50 [ 31.354904] __kasan_slab_free+0x10a/0x190 [ 31.355436] kmem_cache_free+0x10d/0x4d0 [ 31.355933] rcu_core+0x8c8/0x2860 [ 31.356371] __do_softirq+0x1b7/0x7d4 [ 31.356854] [ 31.357073] Last potentially related work creation: [ 31.357649] kasan_save_stack+0x22/0x50 [ 31.358142] __kasan_record_aux_stack+0x8e/0xa0 [ 31.358735] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.359366] remove_vma+0x139/0x170 [ 31.359811] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.360361] do_vmi_munmap+0x1f1/0x2b0 [ 31.360849] __vm_munmap+0x138/0x3a0 [ 31.361307] __x64_sys_munmap+0x59/0x80 [ 31.361807] do_syscall_64+0x3f/0x90 [ 31.362288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.362927] [ 31.363137] The buggy address belongs to the object at ffff88801686f000 [ 31.363137] which belongs to the cache vm_area_struct of size 168 [ 31.364578] The buggy address is located 88 bytes inside of [ 31.364578] freed 168-byte region [ffff88801686f000, ffff88801686f0a8) [ 31.365968] [ 31.366185] The buggy address belongs to the physical page: [ 31.366867] page:000000003d349c0e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1686f [ 31.367944] memcg:ffff8880187c3301 [ 31.368359] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.369000] page_type: 0xffffffff() [ 31.369444] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.370373] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880187c3301 [ 31.371262] page dumped because: kasan: bad access detected [ 31.371909] [ 31.372128] Memory state around the buggy address: [ 31.372699] ffff88801686ef00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.373544] ffff88801686ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.374394] >ffff88801686f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.375239] ^ [ 31.375959] ffff88801686f080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.376802] ffff88801686f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.377644] ================================================================== [ 31.378722] Disabling lock debugging due to kernel taint [ 33.539311] BUG: Bad rss-counter state mm:00000000ad55ee8b type:MM_FILEPAGES val:33 [ 33.540557] BUG: Bad rss-counter state mm:00000000ad55ee8b type:MM_ANONPAGES val:22 [ 34.050018] BUG: Bad rss-counter state mm:00000000509b735f type:MM_FILEPAGES val:33 [ 34.051236] BUG: Bad rss-counter state mm:00000000509b735f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20103' (ECDSA) to the list of known hosts. 2023/06/20 14:13:05 fuzzer started 2023/06/20 14:13:05 dialing manager at localhost:36067 2023/06/20 14:13:05 checking machine... 2023/06/20 14:13:05 checking revisions... [ 34.729814] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:13:05 testing simple program... [ 34.789774] cgroup: Unknown subsys name 'net' [ 34.858805] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:13:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880167d7630 RCX=0000000000000001 RDX=1ffff11002cfaed1 RSI=ffff8880167d7f48 RDI=ffff8880167d7630 RBP=ffff8880167d7688 RSP=ffff8880167d7618 R8 =0000000000000001 R9 =ffff8880167d7670 R10=0000000000038001 R11=00000000000b5080 R12=ffff8880167d76f8 R13=0000000000000000 R14=ffff88800ccf1b40 R15=ffff88801a100be0 RIP=ffffffff8113038e 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 00007fbc35893700 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=00007f8f305e8210 CR3=000000000d826000 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=2035303a33313a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a33313a3431203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007ff15d9855c0 RBX=000055c4dbda1350 RCX=0000000000000000 RDX=0000000000000000 RSI=00007ff15d18e580 RDI=00007ff15d1920c8 RBP=000055c4dbdc1810 RSP=00007ffcaf407ac8 R8 =0000000000000007 R9 =00007ffcaf400eb8 R10=000055c4dbdc72c0 R11=0000000000000246 R12=00007ff15d18e340 R13=0000000000000000 R14=00007ffcaf407ed0 R15=00007ffcaf407c80 RIP=00007ff15d1a43e0 RFL=00000202 [-------] 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 00007ff15cde4900 00000000 00000000 GS =0000 0000000000000000 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=00007ffcaf402000 CR3=000000001652a000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000