syzkaller login: [ 58.974474] BUG: Bad rss-counter state mm:000000000609755b type:MM_FILEPAGES val:33 [ 58.975734] BUG: Bad rss-counter state mm:000000000609755b type:MM_ANONPAGES val:22 [ 59.015376] ================================================================== [ 59.016696] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 59.018025] Read of size 8 at addr ffff888014627b38 by task sshd/225 [ 59.018953] [ 59.019183] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 59.020188] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 59.021371] Call Trace: [ 59.021746] [ 59.022066] dump_stack_lvl+0x91/0xf0 [ 59.022646] print_report+0xcc/0x620 [ 59.023239] ? __virt_addr_valid+0x102/0x340 [ 59.023894] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.024607] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.025362] kasan_report+0xbe/0xf0 [ 59.025960] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.026671] vma_interval_tree_remove+0xc75/0xec0 [ 59.027385] vma_prepare+0xc54/0x11a0 [ 59.027937] __split_vma+0x5af/0x950 [ 59.028433] ? __pfx___split_vma+0x10/0x10 [ 59.028993] ? find_held_lock+0x2c/0x110 [ 59.029661] do_vmi_align_munmap+0x2ba/0x11f0 [ 59.030248] ? lock_is_held_type+0x9f/0x120 [ 59.030825] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 59.031438] ? mtree_range_walk+0x632/0x900 [ 59.032028] ? mas_walk+0x5c7/0x7c0 [ 59.032509] do_vmi_munmap+0x1f1/0x2b0 [ 59.033020] mmap_region+0x1f9/0x2660 [ 59.033520] ? vm_mmap_pgoff+0x15c/0x3a0 [ 59.034072] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 59.034805] ? __pfx_lock_acquire+0x10/0x10 [ 59.035354] ? __pfx_mmap_region+0x10/0x10 [ 59.035904] ? security_mmap_addr+0x7d/0xa0 [ 59.036610] ? get_unmapped_area+0x1f5/0x3f0 [ 59.037371] do_mmap+0x854/0xf00 [ 59.037974] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.038645] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 59.039403] ksys_mmap_pgoff+0x3af/0x500 [ 59.040097] do_syscall_64+0x3f/0x90 [ 59.040740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.041508] RIP: 0033:0x7f4de56f0d82 [ 59.041991] 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 [ 59.044191] RSP: 002b:00007ffcab0fb3b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 59.045128] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4de56f0d82 [ 59.046029] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4de4b2a000 [ 59.046910] RBP: 00007f4de4b2a000 R08: 0000000000000009 R09: 0000000000001000 [ 59.047783] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560ac2fe1ec0 [ 59.048680] R13: 00007ffcab0fb3d0 R14: 00007ffcab0fb400 R15: 00007ffcab0fb760 [ 59.049588] [ 59.049907] [ 59.050131] Allocated by task 218: [ 59.050569] kasan_save_stack+0x22/0x50 [ 59.051090] kasan_set_track+0x25/0x30 [ 59.051588] __kasan_slab_alloc+0x59/0x70 [ 59.052139] kmem_cache_alloc+0x16b/0x370 [ 59.052658] vm_area_dup+0x20/0x160 [ 59.053128] __split_vma+0x170/0x950 [ 59.053603] split_vma+0xc6/0x110 [ 59.054064] mprotect_fixup+0x8d2/0xb30 [ 59.054579] do_mprotect_pkey+0x87e/0xd40 [ 59.055116] __x64_sys_mprotect+0x78/0xc0 [ 59.055642] do_syscall_64+0x3f/0x90 [ 59.056145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.056804] [ 59.057022] Freed by task 218: [ 59.057442] kasan_save_stack+0x22/0x50 [ 59.057973] kasan_set_track+0x25/0x30 [ 59.058488] kasan_save_free_info+0x2b/0x50 [ 59.059081] __kasan_slab_free+0x10a/0x190 [ 59.059636] kmem_cache_free+0x10d/0x4d0 [ 59.060195] rcu_core+0x8c8/0x2860 [ 59.060708] __do_softirq+0x1b7/0x7d4 [ 59.061233] [ 59.061473] Last potentially related work creation: [ 59.062106] kasan_save_stack+0x22/0x50 [ 59.062635] __kasan_record_aux_stack+0x8e/0xa0 [ 59.063249] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.063956] remove_vma+0x139/0x170 [ 59.064435] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.065033] do_vmi_munmap+0x1f1/0x2b0 [ 59.065558] __vm_munmap+0x138/0x3a0 [ 59.066065] __x64_sys_munmap+0x59/0x80 [ 59.066596] do_syscall_64+0x3f/0x90 [ 59.067101] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.067792] [ 59.068031] The buggy address belongs to the object at ffff888014627ae0 [ 59.068031] which belongs to the cache vm_area_struct of size 168 [ 59.069643] The buggy address is located 88 bytes inside of [ 59.069643] freed 168-byte region [ffff888014627ae0, ffff888014627b88) [ 59.071160] [ 59.071388] The buggy address belongs to the physical page: [ 59.072106] page:00000000b10508ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14627 [ 59.073280] memcg:ffff88800fd70001 [ 59.073751] flags: 0x100000000000200(slab|node=0|zone=1) [ 59.074440] page_type: 0xffffffff() [ 59.074934] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 59.075939] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd70001 [ 59.076929] page dumped because: kasan: bad access detected [ 59.077658] [ 59.077901] Memory state around the buggy address: [ 59.078516] ffff888014627a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 59.079441] ffff888014627a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 59.080397] >ffff888014627b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.081343] ^ [ 59.082012] ffff888014627b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 59.082937] ffff888014627c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 59.083868] ================================================================== [ 59.084863] Disabling lock debugging due to kernel taint [ 61.088984] BUG: Bad rss-counter state mm:0000000006ef8747 type:MM_FILEPAGES val:33 [ 61.090160] BUG: Bad rss-counter state mm:0000000006ef8747 type:MM_ANONPAGES val:22 [ 61.550321] BUG: Bad rss-counter state mm:000000002fb7fd78 type:MM_FILEPAGES val:33 [ 61.551584] BUG: Bad rss-counter state mm:000000002fb7fd78 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13229' (ECDSA) to the list of known hosts. 2023/06/20 23:09:02 fuzzer started 2023/06/20 23:09:02 dialing manager at localhost:36067 2023/06/20 23:09:02 checking machine... 2023/06/20 23:09:02 checking revisions... [ 62.252310] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:09:02 testing simple program... [ 62.295928] cgroup: Unknown subsys name 'net' [ 62.355047] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:09:01 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8180f5bb RCX=ffffffff86138e01 RDX=1ffff1100d9c135e RSI=0000000000000000 RDI=ffffffff8180f5bb RBP=ffffffff8180f5bb RSP=ffff88806ce09a48 R8 =ffffffff86138eb4 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d9c R12=0000000000000001 R13=0000000000000000 R14=ffff88800fa8b680 R15=ffff88800ef5d700 RIP=ffffffff811fc772 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 00007f0c6e6da900 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=00007fd517622650 CR3=000000000d9c8000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=749719bc8f1ef15000000000000ae988 XMM05=1432b312fbbd3ba30000000000132368 XMM06=ae9b264101391a5b0000000000130de8 XMM07=fb795ef6d65770560000000000121350 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000002c RBX=00000000000001e0 RCX=00005559ef954010 RDX=000000000000001c RSI=0000000000000004 RDI=00005559ef990f80 RBP=00007fd51761fb80 RSP=00007fffc110fa70 R8 =00005559ef98f9f0 R9 =0000000000000000 R10=00007fd5175d2ac0 R11=0000000000000202 R12=00005559ef990f70 R13=0000000000000000 R14=0000000000000400 R15=00005559ef9897b0 RIP=00007fd5174e7bf0 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 00007fd51706d900 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=00007fd5176250b0 CR3=000000000d8c8000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000