syzkaller login: [ 30.571416] BUG: Bad rss-counter state mm:00000000c68b2631 type:MM_FILEPAGES val:33 [ 30.572370] BUG: Bad rss-counter state mm:00000000c68b2631 type:MM_ANONPAGES val:22 [ 30.738730] ================================================================== [ 30.739673] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.740610] Read of size 8 at addr ffff88800cac1ed8 by task sshd/220 [ 30.741393] [ 30.741613] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.742578] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.743604] Call Trace: [ 30.743942] [ 30.744235] dump_stack_lvl+0x91/0xf0 [ 30.744739] print_report+0xcc/0x620 [ 30.745235] ? __virt_addr_valid+0x102/0x340 [ 30.745792] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.746417] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.747062] kasan_report+0xbe/0xf0 [ 30.747558] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.748206] vma_interval_tree_remove+0xc75/0xec0 [ 30.748831] vma_prepare+0xc54/0x11a0 [ 30.749331] __split_vma+0x5af/0x950 [ 30.749834] ? __pfx___split_vma+0x10/0x10 [ 30.750399] ? find_held_lock+0x2c/0x110 [ 30.750944] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.751554] ? lock_is_held_type+0x9f/0x120 [ 30.752127] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.752763] ? mtree_range_walk+0x632/0x900 [ 30.753354] ? mas_walk+0x5c7/0x7c0 [ 30.753853] do_vmi_munmap+0x1f1/0x2b0 [ 30.754372] mmap_region+0x1f9/0x2660 [ 30.754874] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.755429] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.756199] ? __pfx_lock_acquire+0x10/0x10 [ 30.756760] ? __pfx_mmap_region+0x10/0x10 [ 30.757318] ? security_mmap_addr+0x7d/0xa0 [ 30.757885] ? get_unmapped_area+0x1f5/0x3f0 [ 30.758469] do_mmap+0x854/0xf00 [ 30.758925] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.759458] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.760047] ksys_mmap_pgoff+0x3af/0x500 [ 30.760577] do_syscall_64+0x3f/0x90 [ 30.761080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.761765] RIP: 0033:0x7fa6fd2bbd82 [ 30.762241] 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 [ 30.764522] RSP: 002b:00007fff90ee5ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.765477] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa6fd2bbd82 [ 30.766374] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa6fc6f5000 [ 30.767273] RBP: 00007fa6fc6f5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.768168] R10: 0000000000000812 R11: 0000000000000206 R12: 00005597cc55cb20 [ 30.769058] R13: 00007fff90ee6010 R14: 00007fff90ee6040 R15: 00007fff90ee63a0 [ 30.769969] [ 30.770280] [ 30.770501] Allocated by task 213: [ 30.770951] kasan_save_stack+0x22/0x50 [ 30.771499] kasan_set_track+0x25/0x30 [ 30.772013] __kasan_slab_alloc+0x59/0x70 [ 30.772566] kmem_cache_alloc+0x16b/0x370 [ 30.773122] vm_area_dup+0x20/0x160 [ 30.773596] __split_vma+0x170/0x950 [ 30.774083] split_vma+0xc6/0x110 [ 30.774546] mprotect_fixup+0x8d2/0xb30 [ 30.775079] do_mprotect_pkey+0x87e/0xd40 [ 30.775626] __x64_sys_mprotect+0x78/0xc0 [ 30.776180] do_syscall_64+0x3f/0x90 [ 30.776691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.777373] [ 30.777596] Freed by task 13: [ 30.778002] kasan_save_stack+0x22/0x50 [ 30.778533] kasan_set_track+0x25/0x30 [ 30.779058] kasan_save_free_info+0x2b/0x50 [ 30.779612] __kasan_slab_free+0x10a/0x190 [ 30.780164] kmem_cache_free+0x10d/0x4d0 [ 30.780691] rcu_core+0x8c8/0x2860 [ 30.781154] __do_softirq+0x1b7/0x7d4 [ 30.781664] [ 30.781891] Last potentially related work creation: [ 30.782501] kasan_save_stack+0x22/0x50 [ 30.783022] __kasan_record_aux_stack+0x8e/0xa0 [ 30.783639] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.784311] remove_vma+0x139/0x170 [ 30.784783] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.785376] do_vmi_munmap+0x1f1/0x2b0 [ 30.785886] __vm_munmap+0x138/0x3a0 [ 30.786373] __x64_sys_munmap+0x59/0x80 [ 30.786906] do_syscall_64+0x3f/0x90 [ 30.787408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.788077] [ 30.788299] The buggy address belongs to the object at ffff88800cac1e80 [ 30.788299] which belongs to the cache vm_area_struct of size 168 [ 30.789849] The buggy address is located 88 bytes inside of [ 30.789849] freed 168-byte region [ffff88800cac1e80, ffff88800cac1f28) [ 30.791350] [ 30.791572] The buggy address belongs to the physical page: [ 30.792269] page:00000000e55f15fd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcac1 [ 30.793411] memcg:ffff88800edf7901 [ 30.793861] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.794546] page_type: 0xffffffff() [ 30.795020] raw: 0100000000000200 ffff8880087a0c80 ffffea0000329040 dead000000000002 [ 30.796007] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edf7901 [ 30.796968] page dumped because: kasan: bad access detected [ 30.797680] [ 30.797909] Memory state around the buggy address: [ 30.798524] ffff88800cac1d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.799455] ffff88800cac1e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.800365] >ffff88800cac1e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.801276] ^ [ 30.802045] ffff88800cac1f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.802966] ffff88800cac1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.803887] ================================================================== [ 30.804916] Disabling lock debugging due to kernel taint [ 32.611323] BUG: Bad rss-counter state mm:00000000ddcfaacf type:MM_FILEPAGES val:33 [ 32.612056] BUG: Bad rss-counter state mm:00000000ddcfaacf type:MM_ANONPAGES val:22 [ 33.056386] BUG: Bad rss-counter state mm:00000000e7badcce type:MM_FILEPAGES val:33 [ 33.057375] BUG: Bad rss-counter state mm:00000000e7badcce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58610' (ECDSA) to the list of known hosts. 2023/06/20 11:33:43 fuzzer started 2023/06/20 11:33:43 dialing manager at localhost:36067 2023/06/20 11:33:43 checking machine... 2023/06/20 11:33:43 checking revisions... [ 33.735369] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:33:43 testing simple program... [ 33.785645] cgroup: Unknown subsys name 'net' [ 33.830859] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:33:43 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f4de0c3efa0 CR3=000000000d636000 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=612d485ec6c58ba36141fde4d598c060 XMM02=2c67c8bc2e329bc3000000000011a600 XMM03=fb795ef6d65770560000000000121e70 XMM04=def67ce454d7ba1b00000000000ae988 XMM05=f27f3ca96349495d0000000000132a98 XMM06=4fda316b135da52b0000000000131b38 XMM07=e042d86d42eb936e00000000001220f0 XMM08=2d895cec08cd821e000000000011a660 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000000000000000e RCX=ffffffff8449cc1f RDX=ffff88800f241b40 RSI=0000000000000000 RDI=0000000000000000 RBP=dffffc0000000000 RSP=ffff88801c9f70a0 R8 =0000000000000000 R9 =000000000000000e R10=000000000000000e R11=000056519ba7c000 R12=ffff88800c67ec80 R13=000000000000000e R14=000000000000000e R15=0000000000000068 RIP=ffffffff814c0860 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 00007f6fab1e0900 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=00007f6fab1aa008 CR3=00000000099ce000 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=00000000000000000000000000000000 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