syzkaller login: [ 30.458066] BUG: Bad rss-counter state mm:0000000060de1de8 type:MM_FILEPAGES val:33 [ 30.459284] BUG: Bad rss-counter state mm:0000000060de1de8 type:MM_ANONPAGES val:22 [ 30.621665] ================================================================== [ 30.622602] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.623641] Read of size 8 at addr ffff88800c4e5df0 by task sshd/220 [ 30.624394] [ 30.624612] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.625497] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.626476] Call Trace: [ 30.626790] [ 30.627076] dump_stack_lvl+0x91/0xf0 [ 30.627556] print_report+0xcc/0x620 [ 30.628031] ? __virt_addr_valid+0x102/0x340 [ 30.628570] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.629184] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.629786] kasan_report+0xbe/0xf0 [ 30.630275] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.630893] vma_interval_tree_remove+0xc75/0xec0 [ 30.631494] vma_prepare+0xc54/0x11a0 [ 30.631969] __split_vma+0x5af/0x950 [ 30.632442] ? __pfx___split_vma+0x10/0x10 [ 30.632965] ? find_held_lock+0x2c/0x110 [ 30.633483] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.634075] ? lock_is_held_type+0x9f/0x120 [ 30.634610] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.635213] ? mtree_range_walk+0x632/0x900 [ 30.635760] ? mas_walk+0x5c7/0x7c0 [ 30.636229] do_vmi_munmap+0x1f1/0x2b0 [ 30.636716] mmap_region+0x1f9/0x2660 [ 30.637195] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.637705] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.638425] ? __pfx_lock_acquire+0x10/0x10 [ 30.638968] ? __pfx_mmap_region+0x10/0x10 [ 30.639497] ? security_mmap_addr+0x7d/0xa0 [ 30.640021] ? get_unmapped_area+0x1f5/0x3f0 [ 30.640561] do_mmap+0x854/0xf00 [ 30.640996] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.641482] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.642045] ksys_mmap_pgoff+0x3af/0x500 [ 30.642551] do_syscall_64+0x3f/0x90 [ 30.643023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.643663] RIP: 0033:0x7f11c235bd82 [ 30.644119] 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 [ 30.646247] RSP: 002b:00007fff8ebf64c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.647140] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f11c235bd82 [ 30.647980] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f11c1795000 [ 30.648828] RBP: 00007f11c1795000 R08: 0000000000000009 R09: 0000000000001000 [ 30.649667] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561bde7d5ec0 [ 30.650515] R13: 00007fff8ebf64e0 R14: 00007fff8ebf6510 R15: 00007fff8ebf6870 [ 30.651365] [ 30.651654] [ 30.651869] Allocated by task 213: [ 30.652293] kasan_save_stack+0x22/0x50 [ 30.652792] kasan_set_track+0x25/0x30 [ 30.653283] __kasan_slab_alloc+0x59/0x70 [ 30.653801] kmem_cache_alloc+0x16b/0x370 [ 30.654335] vm_area_dup+0x20/0x160 [ 30.654790] __split_vma+0x170/0x950 [ 30.655255] split_vma+0xc6/0x110 [ 30.655689] mprotect_fixup+0x8d2/0xb30 [ 30.656191] do_mprotect_pkey+0x87e/0xd40 [ 30.656708] __x64_sys_mprotect+0x78/0xc0 [ 30.657228] do_syscall_64+0x3f/0x90 [ 30.657694] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.658337] [ 30.658553] Freed by task 213: [ 30.658939] kasan_save_stack+0x22/0x50 [ 30.659435] kasan_set_track+0x25/0x30 [ 30.659927] kasan_save_free_info+0x2b/0x50 [ 30.660449] __kasan_slab_free+0x10a/0x190 [ 30.660979] kmem_cache_free+0x10d/0x4d0 [ 30.661481] rcu_core+0x8c8/0x2860 [ 30.661934] __do_softirq+0x1b7/0x7d4 [ 30.662401] [ 30.662612] Last potentially related work creation: [ 30.663190] kasan_save_stack+0x22/0x50 [ 30.663689] __kasan_record_aux_stack+0x8e/0xa0 [ 30.664257] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.664885] remove_vma+0x139/0x170 [ 30.665329] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.665884] do_vmi_munmap+0x1f1/0x2b0 [ 30.666365] __vm_munmap+0x138/0x3a0 [ 30.666825] __x64_sys_munmap+0x59/0x80 [ 30.667324] do_syscall_64+0x3f/0x90 [ 30.667795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.668437] [ 30.668649] The buggy address belongs to the object at ffff88800c4e5d98 [ 30.668649] which belongs to the cache vm_area_struct of size 168 [ 30.670111] The buggy address is located 88 bytes inside of [ 30.670111] freed 168-byte region [ffff88800c4e5d98, ffff88800c4e5e40) [ 30.671529] [ 30.671744] The buggy address belongs to the physical page: [ 30.672399] page:0000000003d5026f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4e5 [ 30.673473] memcg:ffff88800f7d4201 [ 30.673919] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.674551] page_type: 0xffffffff() [ 30.674995] raw: 0100000000000200 ffff88800879fc80 ffffea00003a6540 dead000000000008 [ 30.675900] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f7d4201 [ 30.676793] page dumped because: kasan: bad access detected [ 30.677450] [ 30.677663] Memory state around the buggy address: [ 30.678242] ffff88800c4e5c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.679081] ffff88800c4e5d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.679927] >ffff88800c4e5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.680781] ^ [ 30.681612] ffff88800c4e5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.682515] ffff88800c4e5e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.683389] ================================================================== [ 30.684408] Disabling lock debugging due to kernel taint [ 32.841413] BUG: Bad rss-counter state mm:000000008df8a952 type:MM_FILEPAGES val:33 [ 32.842435] BUG: Bad rss-counter state mm:000000008df8a952 type:MM_ANONPAGES val:22 [ 33.279048] BUG: Bad rss-counter state mm:00000000279464b0 type:MM_FILEPAGES val:33 [ 33.279817] BUG: Bad rss-counter state mm:00000000279464b0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58135' (ECDSA) to the list of known hosts. 2023/06/20 03:14:34 fuzzer started 2023/06/20 03:14:34 dialing manager at localhost:44161 2023/06/20 03:14:34 checking machine... 2023/06/20 03:14:34 checking revisions... [ 33.930144] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:14:34 testing simple program... [ 33.969044] cgroup: Unknown subsys name 'net' [ 34.012783] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:14:33 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f184a23e610 CR3=000000000d68a000 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=a8e083d66f8f57b10e4d437305362fa2 XMM02=000000000011d3b8ec2efd57dc4c00df XMM03=00000000001244c81a04495f91f92b65 XMM04=4c0d0ea4bd8bfc1400000000000ae988 XMM05=19e9129bd510f2350000000000134070 XMM06=0bad7885fd6a7cb60000000000132ed8 XMM07=e042d86d42eb936e0000000000124748 XMM08=1a04495f91f92b65000000000011d418 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff846000aa RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800e7079f0 RSI=ffffffff846000aa RDI=ffff88800e7079a8 RBP=ffff88800e707a00 RSP=ffff88800e707938 R8 =0000000000000001 R9 =ffff88800e7079e8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88800e707a70 R13=ffff88800e7079f0 R14=ffff888010098000 R15=ffff88800e7079a8 RIP=ffffffff81130641 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 00007f14c0d68900 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=00007ffe23d7b000 CR3=000000000d942000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000