syzkaller login: [ 30.687781] BUG: Bad rss-counter state mm:000000001c436b2d type:MM_FILEPAGES val:33 [ 30.688911] BUG: Bad rss-counter state mm:000000001c436b2d type:MM_ANONPAGES val:22 [ 30.854112] ================================================================== [ 30.855022] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.855966] Read of size 8 at addr ffff88801a222228 by task sshd/222 [ 30.856846] [ 30.857072] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.857940] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.858935] Call Trace: [ 30.859258] [ 30.859542] dump_stack_lvl+0x91/0xf0 [ 30.860038] print_report+0xcc/0x620 [ 30.860522] ? __virt_addr_valid+0x102/0x340 [ 30.861099] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.861720] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.862340] kasan_report+0xbe/0xf0 [ 30.862815] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.863438] vma_interval_tree_remove+0xc75/0xec0 [ 30.864047] vma_prepare+0xc54/0x11a0 [ 30.864527] __split_vma+0x5af/0x950 [ 30.865014] ? __pfx___split_vma+0x10/0x10 [ 30.865550] ? find_held_lock+0x2c/0x110 [ 30.866075] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.866647] ? lock_is_held_type+0x9f/0x120 [ 30.867183] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.867796] ? mtree_range_walk+0x632/0x900 [ 30.868352] ? mas_walk+0x5c7/0x7c0 [ 30.868835] do_vmi_munmap+0x1f1/0x2b0 [ 30.869333] mmap_region+0x1f9/0x2660 [ 30.869816] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.870333] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.871047] ? __pfx_lock_acquire+0x10/0x10 [ 30.871588] ? __pfx_mmap_region+0x10/0x10 [ 30.872119] ? security_mmap_addr+0x7d/0xa0 [ 30.872656] ? get_unmapped_area+0x1f5/0x3f0 [ 30.873229] do_mmap+0x854/0xf00 [ 30.873666] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.874194] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.874786] ksys_mmap_pgoff+0x3af/0x500 [ 30.875313] do_syscall_64+0x3f/0x90 [ 30.875794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.876407] RIP: 0033:0x7f01415f0d82 [ 30.876841] 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 [ 30.878858] RSP: 002b:00007ffd108bc568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.879719] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f01415f0d82 [ 30.880517] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0140a2a000 [ 30.881329] RBP: 00007f0140a2a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.882125] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e2d9e6df60 [ 30.882923] R13: 00007ffd108bc580 R14: 00007ffd108bc5b0 R15: 00007ffd108bc910 [ 30.883738] [ 30.884019] [ 30.884232] Allocated by task 215: [ 30.884659] kasan_save_stack+0x22/0x50 [ 30.885161] kasan_set_track+0x25/0x30 [ 30.885652] __kasan_slab_alloc+0x59/0x70 [ 30.886163] kmem_cache_alloc+0x16b/0x370 [ 30.886684] vm_area_dup+0x20/0x160 [ 30.887133] __split_vma+0x170/0x950 [ 30.887600] split_vma+0xc6/0x110 [ 30.888033] mprotect_fixup+0x8d2/0xb30 [ 30.888526] do_mprotect_pkey+0x87e/0xd40 [ 30.889052] __x64_sys_mprotect+0x78/0xc0 [ 30.889577] do_syscall_64+0x3f/0x90 [ 30.890045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.890687] [ 30.890894] Freed by task 215: [ 30.891285] kasan_save_stack+0x22/0x50 [ 30.891787] kasan_set_track+0x25/0x30 [ 30.892277] kasan_save_free_info+0x2b/0x50 [ 30.892804] __kasan_slab_free+0x10a/0x190 [ 30.893349] kmem_cache_free+0x10d/0x4d0 [ 30.893852] rcu_core+0x8c8/0x2860 [ 30.894296] __do_softirq+0x1b7/0x7d4 [ 30.894762] [ 30.894978] Last potentially related work creation: [ 30.895558] kasan_save_stack+0x22/0x50 [ 30.896052] __kasan_record_aux_stack+0x8e/0xa0 [ 30.896619] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.897259] remove_vma+0x139/0x170 [ 30.897712] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.898267] do_vmi_munmap+0x1f1/0x2b0 [ 30.898740] __vm_munmap+0x138/0x3a0 [ 30.899206] __x64_sys_munmap+0x59/0x80 [ 30.899696] do_syscall_64+0x3f/0x90 [ 30.900165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.900804] [ 30.901028] The buggy address belongs to the object at ffff88801a2221d0 [ 30.901028] which belongs to the cache vm_area_struct of size 168 [ 30.902489] The buggy address is located 88 bytes inside of [ 30.902489] freed 168-byte region [ffff88801a2221d0, ffff88801a222278) [ 30.903896] [ 30.904108] The buggy address belongs to the physical page: [ 30.904755] page:000000005907ee42 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a222 [ 30.905849] memcg:ffff88800fd3ba01 [ 30.906267] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.906907] page_type: 0xffffffff() [ 30.907362] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.908272] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd3ba01 [ 30.909203] page dumped because: kasan: bad access detected [ 30.909858] [ 30.910075] Memory state around the buggy address: [ 30.910650] ffff88801a222100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.911509] ffff88801a222180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.912365] >ffff88801a222200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.913280] ^ [ 30.913863] ffff88801a222280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.914736] ffff88801a222300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.915593] ================================================================== [ 30.916574] Disabling lock debugging due to kernel taint [ 32.778581] BUG: Bad rss-counter state mm:00000000c4008e75 type:MM_FILEPAGES val:33 [ 32.779393] BUG: Bad rss-counter state mm:00000000c4008e75 type:MM_ANONPAGES val:22 [ 33.196654] BUG: Bad rss-counter state mm:00000000099ef59a type:MM_FILEPAGES val:33 [ 33.197781] BUG: Bad rss-counter state mm:00000000099ef59a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38674' (ECDSA) to the list of known hosts. 2023/06/21 06:05:35 fuzzer started 2023/06/21 06:05:36 dialing manager at localhost:36067 2023/06/21 06:05:36 checking machine... 2023/06/21 06:05:36 checking revisions... [ 33.900039] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:05:36 testing simple program... [ 33.954688] cgroup: Unknown subsys name 'net' [ 33.992059] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:05:35 Registers: info registers vcpu 0 RAX=0000000063f16f34 RBX=00000000a72acb20 RCX=ffff88806ce09bdc RDX=0000000000000007 RSI=000000000000000b RDI=0000000063b45726 RBP=ffffffff813782f8 RSP=ffff88806ce09b68 R8 =000000006035e44c R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff88806ce09bd0 R15=0000000000000007 RIP=ffffffff8227049b RFL=00000202 [-------] 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 00007ff816fba900 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=00007ff81756f650 CR3=000000000eb14000 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=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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=00007ffe87ced398 CR3=000000000e716000 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=2035333a35303a3630203132206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a35303a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000