syzkaller login: [ 51.264310] BUG: Bad rss-counter state mm:00000000477934ff type:MM_FILEPAGES val:33 [ 51.265031] BUG: Bad rss-counter state mm:00000000477934ff type:MM_ANONPAGES val:22 [ 51.384271] ================================================================== [ 51.384946] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.385615] Read of size 8 at addr ffff88801a301ed8 by task sshd/220 [ 51.386147] [ 51.386303] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.386917] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.387619] Call Trace: [ 51.387896] [ 51.388090] dump_stack_lvl+0x91/0xf0 [ 51.388430] print_report+0xcc/0x620 [ 51.389012] ? __virt_addr_valid+0x102/0x340 [ 51.389402] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.389835] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.390262] kasan_report+0xbe/0xf0 [ 51.390603] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.391056] vma_interval_tree_remove+0xc75/0xec0 [ 51.391467] vma_prepare+0xc54/0x11a0 [ 51.391828] __split_vma+0x5af/0x950 [ 51.392154] ? __pfx___split_vma+0x10/0x10 [ 51.392541] ? find_held_lock+0x2c/0x110 [ 51.392940] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.393332] ? lock_is_held_type+0x9f/0x120 [ 51.393731] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.394173] ? mtree_range_walk+0x632/0x900 [ 51.394560] ? mas_walk+0x5c7/0x7c0 [ 51.394899] do_vmi_munmap+0x1f1/0x2b0 [ 51.395242] mmap_region+0x1f9/0x2660 [ 51.395573] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.395949] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.396450] ? __pfx_lock_acquire+0x10/0x10 [ 51.396821] ? __pfx_mmap_region+0x10/0x10 [ 51.397175] ? security_mmap_addr+0x7d/0xa0 [ 51.397543] ? get_unmapped_area+0x1f5/0x3f0 [ 51.397926] do_mmap+0x854/0xf00 [ 51.398238] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.398593] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.399023] ksys_mmap_pgoff+0x3af/0x500 [ 51.399387] do_syscall_64+0x3f/0x90 [ 51.399779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.400243] RIP: 0033:0x7fc8d37e4d82 [ 51.400553] 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 [ 51.402008] RSP: 002b:00007ffd6490fa28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.402650] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc8d37e4d82 [ 51.403234] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc8d2c1e000 [ 51.403846] RBP: 00007fc8d2c1e000 R08: 0000000000000009 R09: 0000000000001000 [ 51.404429] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d0aae22ec0 [ 51.405066] R13: 00007ffd6490fa40 R14: 00007ffd6490fa70 R15: 00007ffd6490fdd0 [ 51.405675] [ 51.405889] [ 51.406038] Allocated by task 213: [ 51.406346] kasan_save_stack+0x22/0x50 [ 51.406700] kasan_set_track+0x25/0x30 [ 51.407031] __kasan_slab_alloc+0x59/0x70 [ 51.407393] kmem_cache_alloc+0x16b/0x370 [ 51.407765] vm_area_dup+0x20/0x160 [ 51.408077] __split_vma+0x170/0x950 [ 51.408403] split_vma+0xc6/0x110 [ 51.408716] mprotect_fixup+0x8d2/0xb30 [ 51.409058] do_mprotect_pkey+0x87e/0xd40 [ 51.409426] __x64_sys_mprotect+0x78/0xc0 [ 51.409799] do_syscall_64+0x3f/0x90 [ 51.410133] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.410579] [ 51.410733] Freed by task 203: [ 51.411007] kasan_save_stack+0x22/0x50 [ 51.411355] kasan_set_track+0x25/0x30 [ 51.411729] kasan_save_free_info+0x2b/0x50 [ 51.412096] __kasan_slab_free+0x10a/0x190 [ 51.412465] kmem_cache_free+0x10d/0x4d0 [ 51.412814] rcu_core+0x8c8/0x2860 [ 51.413116] __do_softirq+0x1b7/0x7d4 [ 51.413438] [ 51.413584] Last potentially related work creation: [ 51.413994] kasan_save_stack+0x22/0x50 [ 51.414339] __kasan_record_aux_stack+0x8e/0xa0 [ 51.414736] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.415178] remove_vma+0x139/0x170 [ 51.415498] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.415902] do_vmi_munmap+0x1f1/0x2b0 [ 51.416236] __vm_munmap+0x138/0x3a0 [ 51.416553] __x64_sys_munmap+0x59/0x80 [ 51.416914] do_syscall_64+0x3f/0x90 [ 51.417237] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.417691] [ 51.417835] The buggy address belongs to the object at ffff88801a301e80 [ 51.417835] which belongs to the cache vm_area_struct of size 168 [ 51.418859] The buggy address is located 88 bytes inside of [ 51.418859] freed 168-byte region [ffff88801a301e80, ffff88801a301f28) [ 51.419862] [ 51.420008] The buggy address belongs to the physical page: [ 51.420467] page:000000003339881a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a301 [ 51.421211] memcg:ffff888018735e01 [ 51.421512] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.421951] page_type: 0xffffffff() [ 51.422259] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 51.422914] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018735e01 [ 51.423545] page dumped because: kasan: bad access detected [ 51.424018] [ 51.424170] Memory state around the buggy address: [ 51.424584] ffff88801a301d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 51.425179] ffff88801a301e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 51.425790] >ffff88801a301e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.426377] ^ [ 51.426897] ffff88801a301f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 51.427500] ffff88801a301f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 51.428118] ================================================================== [ 51.428811] Disabling lock debugging due to kernel taint [ 52.796723] BUG: Bad rss-counter state mm:00000000d4f1c853 type:MM_FILEPAGES val:33 [ 52.797728] BUG: Bad rss-counter state mm:00000000d4f1c853 type:MM_ANONPAGES val:22 [ 53.207222] BUG: Bad rss-counter state mm:00000000a381b645 type:MM_FILEPAGES val:33 [ 53.207971] BUG: Bad rss-counter state mm:00000000a381b645 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25622' (ECDSA) to the list of known hosts. 2023/06/20 09:21:26 fuzzer started 2023/06/20 09:21:26 dialing manager at localhost:44161 2023/06/20 09:21:26 checking machine... 2023/06/20 09:21:26 checking revisions... [ 53.696054] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:21:27 testing simple program... [ 53.735595] cgroup: Unknown subsys name 'net' [ 53.770056] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:21:06 Registers: info registers vcpu 0 RAX=1ffff11001c29a39 RBX=ffff88800e14d198 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e14d1c8 RBP=ffff88800d8da958 RSP=ffff8880142bf8e8 R8 =0000000000000001 R9 =ffffed1002857f11 R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800d9213c0 R14=ffffffff8366dfdf R15=ffff88800eeec600 RIP=ffffffff81846362 RFL=00000046 [---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 00007fb6d4a33900 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=00007fb6d3e5eeb0 CR3=000000000f2f6000 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=3d90e6d0fb1e69ab754f4ec4fd53a79c XMM02=ec2efd57dc4c00df000000000011cf18 XMM03=bd24bf9fcaae7d37000000000011cfe8 XMM04=59b61cc2dede479200000000000ae988 XMM05=728116aec9b066220000000000134d40 XMM06=4fda316b135da52b0000000000133de0 XMM07=fb795ef6d657705600000000001243f0 XMM08=2c67c8bc2e329bc3000000000011cf88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff861c7682 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800fe67930 RSP=ffff88800fe67868 R8 =ffffffff861c7686 R9 =ffff88800fe67918 R10=0000000000038001 R11=0000000000038dc4 R12=ffff88800fe67938 R13=ffff88800fe67920 R14=0000000000000015 R15=ffff88800fe678d8 RIP=ffffffff81130b17 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 00007fb4737f5900 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=00007fb473dad0b0 CR3=000000000e88c000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000