syzkaller login: [ 30.606623] BUG: Bad rss-counter state mm:00000000b3986d02 type:MM_FILEPAGES val:33 [ 30.607818] BUG: Bad rss-counter state mm:00000000b3986d02 type:MM_ANONPAGES val:22 [ 30.646738] ================================================================== [ 30.647686] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.648804] Read of size 8 at addr ffff88800d9b4c20 by task sshd/221 [ 30.649655] [ 30.649987] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.651063] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.652069] Call Trace: [ 30.652464] <TASK> [ 30.652750] dump_stack_lvl+0x91/0xf0 [ 30.653250] print_report+0xcc/0x620 [ 30.653817] ? __virt_addr_valid+0x102/0x340 [ 30.654535] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.655231] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.655875] kasan_report+0xbe/0xf0 [ 30.656352] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.656974] vma_interval_tree_remove+0xc75/0xec0 [ 30.657583] vma_prepare+0xc54/0x11a0 [ 30.658065] __split_vma+0x5af/0x950 [ 30.658543] ? __pfx___split_vma+0x10/0x10 [ 30.659074] ? find_held_lock+0x2c/0x110 [ 30.659596] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.660169] ? lock_is_held_type+0x9f/0x120 [ 30.660706] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.661314] ? mtree_range_walk+0x632/0x900 [ 30.661868] ? mas_walk+0x5c7/0x7c0 [ 30.662340] do_vmi_munmap+0x1f1/0x2b0 [ 30.662831] mmap_region+0x1f9/0x2660 [ 30.663312] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.663836] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.664557] ? __pfx_lock_acquire+0x10/0x10 [ 30.665090] ? __pfx_mmap_region+0x10/0x10 [ 30.665621] ? security_mmap_addr+0x7d/0xa0 [ 30.666171] ? get_unmapped_area+0x1f5/0x3f0 [ 30.666757] do_mmap+0x854/0xf00 [ 30.667215] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.667762] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.668350] ksys_mmap_pgoff+0x3af/0x500 [ 30.668887] do_syscall_64+0x3f/0x90 [ 30.669397] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.670095] RIP: 0033:0x7f7f6b847d82 [ 30.670588] 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 [ 30.672888] RSP: 002b:00007ffdf76728d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.673845] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7f6b847d82 [ 30.674759] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7f6ac81000 [ 30.675675] RBP: 00007f7f6ac81000 R08: 0000000000000009 R09: 0000000000001000 [ 30.676575] R10: 0000000000000812 R11: 0000000000000206 R12: 000056210f638f70 [ 30.677481] R13: 00007ffdf76728f0 R14: 00007ffdf7672920 R15: 00007ffdf7672c80 [ 30.678396] </TASK> [ 30.678704] [ 30.678925] Allocated by task 214: [ 30.679383] kasan_save_stack+0x22/0x50 [ 30.679913] kasan_set_track+0x25/0x30 [ 30.680439] __kasan_slab_alloc+0x59/0x70 [ 30.680996] kmem_cache_alloc+0x16b/0x370 [ 30.681541] vm_area_dup+0x20/0x160 [ 30.682025] __split_vma+0x170/0x950 [ 30.682512] split_vma+0xc6/0x110 [ 30.682974] mprotect_fixup+0x8d2/0xb30 [ 30.683509] do_mprotect_pkey+0x87e/0xd40 [ 30.684061] __x64_sys_mprotect+0x78/0xc0 [ 30.684610] do_syscall_64+0x3f/0x90 [ 30.685115] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.685795] [ 30.686019] Freed by task 214: [ 30.686429] kasan_save_stack+0x22/0x50 [ 30.686963] kasan_set_track+0x25/0x30 [ 30.687505] kasan_save_free_info+0x2b/0x50 [ 30.688063] __kasan_slab_free+0x10a/0x190 [ 30.688627] kmem_cache_free+0x10d/0x4d0 [ 30.689176] rcu_core+0x8c8/0x2860 [ 30.689650] __do_softirq+0x1b7/0x7d4 [ 30.690156] [ 30.690379] Last potentially related work creation: [ 30.691064] kasan_save_stack+0x22/0x50 [ 30.691600] __kasan_record_aux_stack+0x8e/0xa0 [ 30.692214] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.692903] remove_vma+0x139/0x170 [ 30.693375] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.693961] do_vmi_munmap+0x1f1/0x2b0 [ 30.694467] __vm_munmap+0x138/0x3a0 [ 30.694958] __x64_sys_munmap+0x59/0x80 [ 30.695496] do_syscall_64+0x3f/0x90 [ 30.695995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.696670] [ 30.696897] The buggy address belongs to the object at ffff88800d9b4bc8 [ 30.696897] which belongs to the cache vm_area_struct of size 168 [ 30.698458] The buggy address is located 88 bytes inside of [ 30.698458] freed 168-byte region [ffff88800d9b4bc8, ffff88800d9b4c70) [ 30.699958] [ 30.700187] The buggy address belongs to the physical page: [ 30.700898] page:000000005d0f786c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9b4 [ 30.702055] memcg:ffff8880095a2a01 [ 30.702505] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.703195] page_type: 0xffffffff() [ 30.703679] raw: 0100000000000200 ffff8880087a0c80 ffffea0000366280 dead000000000002 [ 30.704664] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095a2a01 [ 30.705624] page dumped because: kasan: bad access detected [ 30.706322] [ 30.706548] Memory state around the buggy address: [ 30.707168] ffff88800d9b4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.708107] ffff88800d9b4b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.709012] >ffff88800d9b4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.709915] ^ [ 30.710474] ffff88800d9b4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.711388] ffff88800d9b4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.712298] ================================================================== [ 30.713284] Disabling lock debugging due to kernel taint [ 33.368379] BUG: Bad rss-counter state mm:000000000738ab63 type:MM_FILEPAGES val:33 [ 33.369455] BUG: Bad rss-counter state mm:000000000738ab63 type:MM_ANONPAGES val:22 [ 33.909139] BUG: Bad rss-counter state mm:00000000a956cd15 type:MM_FILEPAGES val:33 [ 33.910404] BUG: Bad rss-counter state mm:00000000a956cd15 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56541' (ECDSA) to the list of known hosts. 2023/06/20 11:30:58 fuzzer started 2023/06/20 11:30:59 dialing manager at localhost:36067 2023/06/20 11:30:59 checking machine... 2023/06/20 11:30:59 checking revisions... [ 34.534931] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:30:59 testing simple program... [ 34.566702] cgroup: Unknown subsys name 'net' [ 34.627936] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:30:58 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=ffff888008c04000 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=00007ff3d4343960 CR3=0000000019550000 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=2038353a30333a3131203032206e754a XMM01=6964206465766965636552203a5d3033 XMM02=6f63736964203a31313a343930363320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a30333a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffffffff85d3e490 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100395df3b RSP=ffff88801caef9c8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=ffffffff8560b640 R13=ffffffff8189dc57 R14=ffff88801caefc68 R15=ffff88801caefc48 RIP=ffffffff812d8730 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 00007f3a1d089900 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=00007f3a1d6410b0 CR3=000000000edf2000 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=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