syzkaller login: [ 31.439264] BUG: Bad rss-counter state mm:0000000056bfae4f type:MM_FILEPAGES val:33 [ 31.440304] BUG: Bad rss-counter state mm:0000000056bfae4f type:MM_ANONPAGES val:22 [ 31.607581] ================================================================== [ 31.608547] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.609535] Read of size 8 at addr ffff88801a277d08 by task sshd/219 [ 31.610368] [ 31.610596] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.611634] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.612674] Call Trace: [ 31.613016] <TASK> [ 31.613325] dump_stack_lvl+0x91/0xf0 [ 31.613842] print_report+0xcc/0x620 [ 31.614402] ? __virt_addr_valid+0x102/0x340 [ 31.615044] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.615710] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.616362] kasan_report+0xbe/0xf0 [ 31.616867] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.617522] vma_interval_tree_remove+0xc75/0xec0 [ 31.618173] vma_prepare+0xc54/0x11a0 [ 31.618695] __split_vma+0x5af/0x950 [ 31.619192] ? __pfx___split_vma+0x10/0x10 [ 31.619748] ? find_held_lock+0x2c/0x110 [ 31.620301] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.620892] ? lock_is_held_type+0x9f/0x120 [ 31.621462] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.622103] ? mtree_range_walk+0x632/0x900 [ 31.622693] ? mas_walk+0x5c7/0x7c0 [ 31.623201] do_vmi_munmap+0x1f1/0x2b0 [ 31.623716] mmap_region+0x1f9/0x2660 [ 31.624223] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.624766] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.625522] ? __pfx_lock_acquire+0x10/0x10 [ 31.626088] ? __pfx_mmap_region+0x10/0x10 [ 31.626666] ? security_mmap_addr+0x7d/0xa0 [ 31.627225] ? get_unmapped_area+0x1f5/0x3f0 [ 31.627797] do_mmap+0x854/0xf00 [ 31.628261] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.628786] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.629375] ksys_mmap_pgoff+0x3af/0x500 [ 31.629906] do_syscall_64+0x3f/0x90 [ 31.630411] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.631087] RIP: 0033:0x7fa2fcd79d82 [ 31.631563] 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 [ 31.633790] RSP: 002b:00007fff0a7df8a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.634751] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa2fcd79d82 [ 31.635639] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa2fc1b3000 [ 31.636528] RBP: 00007fa2fc1b3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.637425] R10: 0000000000000812 R11: 0000000000000206 R12: 00005638731a8b20 [ 31.638334] R13: 00007fff0a7df8c0 R14: 00007fff0a7df8f0 R15: 00007fff0a7dfc50 [ 31.639232] </TASK> [ 31.639544] [ 31.639770] Allocated by task 212: [ 31.640247] kasan_save_stack+0x22/0x50 [ 31.640784] kasan_set_track+0x25/0x30 [ 31.641310] __kasan_slab_alloc+0x59/0x70 [ 31.641857] kmem_cache_alloc+0x16b/0x370 [ 31.642409] vm_area_dup+0x20/0x160 [ 31.642888] __split_vma+0x170/0x950 [ 31.643373] split_vma+0xc6/0x110 [ 31.643842] mprotect_fixup+0x8d2/0xb30 [ 31.644374] do_mprotect_pkey+0x87e/0xd40 [ 31.644923] __x64_sys_mprotect+0x78/0xc0 [ 31.645471] do_syscall_64+0x3f/0x90 [ 31.645965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.646653] [ 31.646882] Freed by task 212: [ 31.647305] kasan_save_stack+0x22/0x50 [ 31.647837] kasan_set_track+0x25/0x30 [ 31.648371] kasan_save_free_info+0x2b/0x50 [ 31.648939] __kasan_slab_free+0x10a/0x190 [ 31.649511] kmem_cache_free+0x10d/0x4d0 [ 31.650052] rcu_core+0x8c8/0x2860 [ 31.650539] __do_softirq+0x1b7/0x7d4 [ 31.651040] [ 31.651273] Last potentially related work creation: [ 31.651896] kasan_save_stack+0x22/0x50 [ 31.652430] __kasan_record_aux_stack+0x8e/0xa0 [ 31.653039] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.653720] remove_vma+0x139/0x170 [ 31.654200] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.654796] do_vmi_munmap+0x1f1/0x2b0 [ 31.655315] __vm_munmap+0x138/0x3a0 [ 31.655810] __x64_sys_munmap+0x59/0x80 [ 31.656332] do_syscall_64+0x3f/0x90 [ 31.656835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.657515] [ 31.657745] The buggy address belongs to the object at ffff88801a277cb0 [ 31.657745] which belongs to the cache vm_area_struct of size 168 [ 31.659311] The buggy address is located 88 bytes inside of [ 31.659311] freed 168-byte region [ffff88801a277cb0, ffff88801a277d58) [ 31.660788] [ 31.661018] The buggy address belongs to the physical page: [ 31.661716] page:000000003a83da04 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a277 [ 31.662889] memcg:ffff88800d84c301 [ 31.663341] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.664025] page_type: 0xffffffff() [ 31.664506] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.665479] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d84c301 [ 31.666452] page dumped because: kasan: bad access detected [ 31.667156] [ 31.667390] Memory state around the buggy address: [ 31.668002] ffff88801a277c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.668903] ffff88801a277c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.669800] >ffff88801a277d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.670697] ^ [ 31.671162] ffff88801a277d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.672063] ffff88801a277e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.672964] ================================================================== [ 31.674280] Disabling lock debugging due to kernel taint [ 33.693356] BUG: Bad rss-counter state mm:00000000ed5a69f3 type:MM_FILEPAGES val:33 [ 33.694584] BUG: Bad rss-counter state mm:00000000ed5a69f3 type:MM_ANONPAGES val:22 [ 34.266033] BUG: Bad rss-counter state mm:00000000cfd4406c type:MM_FILEPAGES val:33 [ 34.267046] BUG: Bad rss-counter state mm:00000000cfd4406c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19575' (ECDSA) to the list of known hosts. 2023/06/20 00:56:56 fuzzer started 2023/06/20 00:56:56 dialing manager at localhost:44161 2023/06/20 00:56:56 checking machine... 2023/06/20 00:56:56 checking revisions... [ 34.904841] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:56:56 testing simple program... [ 34.951947] cgroup: Unknown subsys name 'net' [ 34.988726] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:56:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800c5cf7a0 RCX=0000000000000001 RDX=1ffff110018b9ef6 RSI=ffff88800c5cfaa8 RDI=ffff88800c5cf7b0 RBP=ffff88800c5cfaa8 RSP=ffff88800c5cf6f8 R8 =ffffffff861c7686 R9 =ffff88800c5cf7e0 R10=0000000000038001 R11=0000000000038dc4 R12=0000000000000008 R13=ffff88800c5c8000 R14=ffff88800c5cfab0 R15=ffff88800c5cf7a0 RIP=ffffffff81130468 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 00007fb5e0ec3900 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=00007fb5e147b0b0 CR3=000000001b26a000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f606726ab30 CR3=000000000fa0e000 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=2036353a36353a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a36353a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000