syzkaller login: [ 38.838371] BUG: Bad rss-counter state mm:000000007c022bc9 type:MM_FILEPAGES val:33 [ 38.839364] BUG: Bad rss-counter state mm:000000007c022bc9 type:MM_ANONPAGES val:22 [ 39.014435] ================================================================== [ 39.015422] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.016433] Read of size 8 at addr ffff888009e2ec20 by task sshd/226 [ 39.017434] [ 39.017667] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.018572] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.019608] Call Trace: [ 39.019951] [ 39.020254] dump_stack_lvl+0x91/0xf0 [ 39.020804] print_report+0xcc/0x620 [ 39.021316] ? __virt_addr_valid+0x102/0x340 [ 39.021903] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.022553] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.023209] kasan_report+0xbe/0xf0 [ 39.023715] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.024374] vma_interval_tree_remove+0xc75/0xec0 [ 39.025038] vma_prepare+0xc54/0x11a0 [ 39.025572] __split_vma+0x5af/0x950 [ 39.026092] ? __pfx___split_vma+0x10/0x10 [ 39.026669] ? find_held_lock+0x2c/0x110 [ 39.027242] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.027865] ? lock_is_held_type+0x9f/0x120 [ 39.028470] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.029154] ? mtree_range_walk+0x632/0x900 [ 39.029764] ? mas_walk+0x5c7/0x7c0 [ 39.030294] do_vmi_munmap+0x1f1/0x2b0 [ 39.030836] mmap_region+0x1f9/0x2660 [ 39.031366] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.031928] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.032719] ? __pfx_lock_acquire+0x10/0x10 [ 39.033307] ? __pfx_mmap_region+0x10/0x10 [ 39.033887] ? security_mmap_addr+0x7d/0xa0 [ 39.034467] ? get_unmapped_area+0x1f5/0x3f0 [ 39.035071] do_mmap+0x854/0xf00 [ 39.035558] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.036102] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.036740] ksys_mmap_pgoff+0x3af/0x500 [ 39.037304] do_syscall_64+0x3f/0x90 [ 39.037841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.038550] RIP: 0033:0x7f1b1da76d82 [ 39.039050] 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 [ 39.041410] RSP: 002b:00007fff96804c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.042412] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1b1da76d82 [ 39.043338] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b1ceb0000 [ 39.044270] RBP: 00007f1b1ceb0000 R08: 0000000000000009 R09: 0000000000001000 [ 39.045202] R10: 0000000000000812 R11: 0000000000000206 R12: 00005598e5b06ec0 [ 39.046128] R13: 00007fff96804c20 R14: 00007fff96804c50 R15: 00007fff96804fb0 [ 39.047071] [ 39.047392] [ 39.047626] Allocated by task 219: [ 39.048095] kasan_save_stack+0x22/0x50 [ 39.048671] kasan_set_track+0x25/0x30 [ 39.049219] __kasan_slab_alloc+0x59/0x70 [ 39.049793] kmem_cache_alloc+0x16b/0x370 [ 39.050357] vm_area_dup+0x20/0x160 [ 39.050856] __split_vma+0x170/0x950 [ 39.051367] split_vma+0xc6/0x110 [ 39.051856] mprotect_fixup+0x8d2/0xb30 [ 39.052413] do_mprotect_pkey+0x87e/0xd40 [ 39.052994] __x64_sys_mprotect+0x78/0xc0 [ 39.053570] do_syscall_64+0x3f/0x90 [ 39.054091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.054797] [ 39.055032] Freed by task 204: [ 39.055460] kasan_save_stack+0x22/0x50 [ 39.056013] kasan_set_track+0x25/0x30 [ 39.056556] kasan_save_free_info+0x2b/0x50 [ 39.057160] __kasan_slab_free+0x10a/0x190 [ 39.057746] kmem_cache_free+0x10d/0x4d0 [ 39.058427] rcu_core+0x8c8/0x2860 [ 39.058911] __do_softirq+0x1b7/0x7d4 [ 39.059437] [ 39.059672] Last potentially related work creation: [ 39.060309] kasan_save_stack+0x22/0x50 [ 39.060876] __kasan_record_aux_stack+0x8e/0xa0 [ 39.061510] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.062218] remove_vma+0x139/0x170 [ 39.062716] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.063333] do_vmi_munmap+0x1f1/0x2b0 [ 39.063867] __vm_munmap+0x138/0x3a0 [ 39.064380] __x64_sys_munmap+0x59/0x80 [ 39.064945] do_syscall_64+0x3f/0x90 [ 39.065470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.066177] [ 39.066415] The buggy address belongs to the object at ffff888009e2ebc8 [ 39.066415] which belongs to the cache vm_area_struct of size 168 [ 39.068025] The buggy address is located 88 bytes inside of [ 39.068025] freed 168-byte region [ffff888009e2ebc8, ffff888009e2ec70) [ 39.069575] [ 39.069812] The buggy address belongs to the physical page: [ 39.070534] page:00000000ae28d054 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9e2e [ 39.071722] memcg:ffff888009e2c101 [ 39.072190] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.072909] page_type: 0xffffffff() [ 39.073408] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.074418] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009e2c101 [ 39.075411] page dumped because: kasan: bad access detected [ 39.076140] [ 39.076375] Memory state around the buggy address: [ 39.077031] ffff888009e2eb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.077983] ffff888009e2eb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.078921] >ffff888009e2ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.079837] ^ [ 39.080397] ffff888009e2ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.081309] ffff888009e2ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.082211] ================================================================== [ 39.083250] Disabling lock debugging due to kernel taint [ 41.775015] BUG: Bad rss-counter state mm:00000000ad446a60 type:MM_FILEPAGES val:33 [ 41.775980] BUG: Bad rss-counter state mm:00000000ad446a60 type:MM_ANONPAGES val:22 [ 42.276765] BUG: Bad rss-counter state mm:00000000ffd1fcb4 type:MM_FILEPAGES val:33 [ 42.277958] BUG: Bad rss-counter state mm:00000000ffd1fcb4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50472' (ECDSA) to the list of known hosts. 2023/06/20 19:37:38 fuzzer started 2023/06/20 19:37:39 dialing manager at localhost:36067 2023/06/20 19:37:39 checking machine... 2023/06/20 19:37:39 checking revisions... [ 43.058791] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:37:39 testing simple program... [ 43.123471] cgroup: Unknown subsys name 'net' [ 43.180090] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:37:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b5fba RDX=1ffff11002cd1f58 RSI=1ffff11002cd1f57 RDI=1ffff11002cd1f57 RBP=ffff88801668fab8 RSP=ffff88801668f9f0 R8 =ffffffff863b5fbe R9 =ffff88801668faa0 R10=0000000000038001 R11=000000000008b06b R12=ffff88801668fac0 R13=ffff88801668faa8 R14=ffff88801668fdb0 R15=ffff88801668fa60 RIP=ffffffff811310d4 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 00007f891b172900 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=00007f891b727650 CR3=000000001b440000 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=0000000000000010 RBX=0000000000000001 RCX=ffffffff86138976 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff8613897a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88801420f8a0 R15=ffff88806cf09a98 RIP=ffffffff81130bba 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 00007ff9b0aab900 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=00007ff9afecd138 CR3=000000000c58e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=e34a30aca33893da00000000000ae988 XMM05=78665bf991d8bbee0000000000132f30 XMM06=61c947d7c83f1e9a0000000000131960 XMM07=fb795ef6d65770560000000000121e88 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000