syzkaller login: [ 38.821888] BUG: Bad rss-counter state mm:00000000b23cce86 type:MM_FILEPAGES val:33 [ 38.822720] BUG: Bad rss-counter state mm:00000000b23cce86 type:MM_ANONPAGES val:22 [ 38.939227] ================================================================== [ 38.939879] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.940512] Read of size 8 at addr ffff88800defb228 by task sshd/219 [ 38.941034] [ 38.941185] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.941773] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.942427] Call Trace: [ 38.942648] [ 38.942844] dump_stack_lvl+0x91/0xf0 [ 38.943180] print_report+0xcc/0x620 [ 38.943637] ? __virt_addr_valid+0x102/0x340 [ 38.944013] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.944457] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.944868] kasan_report+0xbe/0xf0 [ 38.945210] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.945660] vma_interval_tree_remove+0xc75/0xec0 [ 38.946074] vma_prepare+0xc54/0x11a0 [ 38.946408] __split_vma+0x5af/0x950 [ 38.946733] ? __pfx___split_vma+0x10/0x10 [ 38.947092] ? find_held_lock+0x2c/0x110 [ 38.947459] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.947847] ? lock_is_held_type+0x9f/0x120 [ 38.948220] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.948632] ? mtree_range_walk+0x632/0x900 [ 38.949007] ? mas_walk+0x5c7/0x7c0 [ 38.949333] do_vmi_munmap+0x1f1/0x2b0 [ 38.949670] mmap_region+0x1f9/0x2660 [ 38.949997] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.950397] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.950888] ? __pfx_lock_acquire+0x10/0x10 [ 38.951252] ? __pfx_mmap_region+0x10/0x10 [ 38.951638] ? security_mmap_addr+0x7d/0xa0 [ 38.951997] ? get_unmapped_area+0x1f5/0x3f0 [ 38.952369] do_mmap+0x854/0xf00 [ 38.952670] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.953008] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.953394] ksys_mmap_pgoff+0x3af/0x500 [ 38.953740] do_syscall_64+0x3f/0x90 [ 38.954090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.954578] RIP: 0033:0x7fce93029d82 [ 38.954913] 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 [ 38.956520] RSP: 002b:00007ffd84cb0c48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.957176] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fce93029d82 [ 38.957796] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fce92463000 [ 38.958422] RBP: 00007fce92463000 R08: 0000000000000009 R09: 0000000000001000 [ 38.959039] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557ed5131ec0 [ 38.959660] R13: 00007ffd84cb0c60 R14: 00007ffd84cb0c90 R15: 00007ffd84cb0ff0 [ 38.960280] [ 38.960496] [ 38.960653] Allocated by task 212: [ 38.960963] kasan_save_stack+0x22/0x50 [ 38.961351] kasan_set_track+0x25/0x30 [ 38.961704] __kasan_slab_alloc+0x59/0x70 [ 38.962079] kmem_cache_alloc+0x16b/0x370 [ 38.962492] vm_area_dup+0x20/0x160 [ 38.962816] __split_vma+0x170/0x950 [ 38.963149] split_vma+0xc6/0x110 [ 38.963490] mprotect_fixup+0x8d2/0xb30 [ 38.963850] do_mprotect_pkey+0x87e/0xd40 [ 38.964223] __x64_sys_mprotect+0x78/0xc0 [ 38.964598] do_syscall_64+0x3f/0x90 [ 38.964937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.965400] [ 38.965553] Freed by task 19: [ 38.965836] kasan_save_stack+0x22/0x50 [ 38.966198] kasan_set_track+0x25/0x30 [ 38.966549] kasan_save_free_info+0x2b/0x50 [ 38.966929] __kasan_slab_free+0x10a/0x190 [ 38.967324] kmem_cache_free+0x10d/0x4d0 [ 38.967683] rcu_core+0x8c8/0x2860 [ 38.967998] __do_softirq+0x1b7/0x7d4 [ 38.968354] [ 38.968508] Last potentially related work creation: [ 38.968924] kasan_save_stack+0x22/0x50 [ 38.969291] __kasan_record_aux_stack+0x8e/0xa0 [ 38.969700] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.970163] remove_vma+0x139/0x170 [ 38.970489] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.970893] do_vmi_munmap+0x1f1/0x2b0 [ 38.971242] __vm_munmap+0x138/0x3a0 [ 38.971585] __x64_sys_munmap+0x59/0x80 [ 38.971938] do_syscall_64+0x3f/0x90 [ 38.972287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.972746] [ 38.972906] The buggy address belongs to the object at ffff88800defb1d0 [ 38.972906] which belongs to the cache vm_area_struct of size 168 [ 38.973952] The buggy address is located 88 bytes inside of [ 38.973952] freed 168-byte region [ffff88800defb1d0, ffff88800defb278) [ 38.975001] [ 38.975159] The buggy address belongs to the physical page: [ 38.975645] page:000000000472c646 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdefb [ 38.976419] memcg:ffff88800de3aa01 [ 38.976725] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.977190] page_type: 0xffffffff() [ 38.977511] raw: 0100000000000200 ffff8880087a0c80 ffffea0000368500 dead000000000008 [ 38.978174] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de3aa01 [ 38.978822] page dumped because: kasan: bad access detected [ 38.979336] [ 38.979494] Memory state around the buggy address: [ 38.979910] ffff88800defb100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.980540] ffff88800defb180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.981160] >ffff88800defb200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.981769] ^ [ 38.982167] ffff88800defb280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.982783] ffff88800defb300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.983411] ================================================================== [ 38.984182] Disabling lock debugging due to kernel taint [ 40.494842] BUG: Bad rss-counter state mm:0000000042ae1a28 type:MM_FILEPAGES val:33 [ 40.495620] BUG: Bad rss-counter state mm:0000000042ae1a28 type:MM_ANONPAGES val:22 [ 40.856280] BUG: Bad rss-counter state mm:000000002cf2fed8 type:MM_FILEPAGES val:33 [ 40.857413] BUG: Bad rss-counter state mm:000000002cf2fed8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10052' (ECDSA) to the list of known hosts. 2023/06/21 09:13:23 fuzzer started 2023/06/21 09:13:24 dialing manager at localhost:36067 2023/06/21 09:13:24 checking machine... 2023/06/21 09:13:24 checking revisions... [ 41.471273] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:13:24 testing simple program... [ 41.504371] cgroup: Unknown subsys name 'net' [ 41.534321] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:13:23 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=0000000000000001 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=00007ffd515e9948 CR3=0000000005482000 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=00007fae373db51000005624af3b0790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888009b523b8 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88800f0474f8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000c5e00000c5e R12=0000000000000000 R13=0000000000000077 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff84511dd6 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 00007f56a2e41900 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=00007f56a33f8618 CR3=000000001864e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000