syzkaller login: [ 62.313424] BUG: Bad rss-counter state mm:00000000bd12dd0c type:MM_FILEPAGES val:33 [ 62.314899] BUG: Bad rss-counter state mm:00000000bd12dd0c type:MM_ANONPAGES val:22 [ 62.483367] ================================================================== [ 62.484379] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.485405] Read of size 8 at addr ffff8880099e73f8 by task sshd/220 [ 62.486373] [ 62.486614] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.487551] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.488772] Call Trace: [ 62.489164] [ 62.489510] dump_stack_lvl+0x91/0xf0 [ 62.490101] print_report+0xcc/0x620 [ 62.490691] ? __virt_addr_valid+0x102/0x340 [ 62.491360] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.492110] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.492906] kasan_report+0xbe/0xf0 [ 62.493512] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.494306] vma_interval_tree_remove+0xc75/0xec0 [ 62.495076] vma_prepare+0xc54/0x11a0 [ 62.495689] __split_vma+0x5af/0x950 [ 62.496299] ? __pfx___split_vma+0x10/0x10 [ 62.497006] ? find_held_lock+0x2c/0x110 [ 62.497594] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.498217] ? lock_is_held_type+0x9f/0x120 [ 62.498816] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.499484] ? mtree_range_walk+0x632/0x900 [ 62.500095] ? mas_walk+0x5c7/0x7c0 [ 62.500620] do_vmi_munmap+0x1f1/0x2b0 [ 62.501161] mmap_region+0x1f9/0x2660 [ 62.501688] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.502255] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.503040] ? __pfx_lock_acquire+0x10/0x10 [ 62.503619] ? __pfx_mmap_region+0x10/0x10 [ 62.504199] ? security_mmap_addr+0x7d/0xa0 [ 62.504788] ? get_unmapped_area+0x1f5/0x3f0 [ 62.505392] do_mmap+0x854/0xf00 [ 62.505871] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.506419] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.507042] ksys_mmap_pgoff+0x3af/0x500 [ 62.507598] do_syscall_64+0x3f/0x90 [ 62.508119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.508846] RIP: 0033:0x7fee1ca4dd82 [ 62.509348] 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 [ 62.511670] RSP: 002b:00007ffeb83d9298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.512657] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee1ca4dd82 [ 62.513576] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee1be87000 [ 62.514500] RBP: 00007fee1be87000 R08: 0000000000000009 R09: 0000000000001000 [ 62.515421] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e0d760ec0 [ 62.516349] R13: 00007ffeb83d92b0 R14: 00007ffeb83d92e0 R15: 00007ffeb83d9640 [ 62.517295] [ 62.517616] [ 62.517850] Allocated by task 213: [ 62.518313] kasan_save_stack+0x22/0x50 [ 62.518861] kasan_set_track+0x25/0x30 [ 62.519395] __kasan_slab_alloc+0x59/0x70 [ 62.519968] kmem_cache_alloc+0x16b/0x370 [ 62.520543] vm_area_dup+0x20/0x160 [ 62.521043] __split_vma+0x170/0x950 [ 62.521557] split_vma+0xc6/0x110 [ 62.522041] mprotect_fixup+0x8d2/0xb30 [ 62.522587] do_mprotect_pkey+0x87e/0xd40 [ 62.523147] __x64_sys_mprotect+0x78/0xc0 [ 62.523705] do_syscall_64+0x3f/0x90 [ 62.524229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.524936] [ 62.525170] Freed by task 210: [ 62.525595] kasan_save_stack+0x22/0x50 [ 62.526144] kasan_set_track+0x25/0x30 [ 62.526681] kasan_save_free_info+0x2b/0x50 [ 62.527253] __kasan_slab_free+0x10a/0x190 [ 62.527923] kmem_cache_free+0x10d/0x4d0 [ 62.528473] rcu_core+0x8c8/0x2860 [ 62.528966] __do_softirq+0x1b7/0x7d4 [ 62.529475] [ 62.529707] Last potentially related work creation: [ 62.530342] kasan_save_stack+0x22/0x50 [ 62.530884] __kasan_record_aux_stack+0x8e/0xa0 [ 62.531499] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.532192] remove_vma+0x139/0x170 [ 62.532686] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.533285] do_vmi_munmap+0x1f1/0x2b0 [ 62.533809] __vm_munmap+0x138/0x3a0 [ 62.534311] __x64_sys_munmap+0x59/0x80 [ 62.534847] do_syscall_64+0x3f/0x90 [ 62.535353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.536036] [ 62.536262] The buggy address belongs to the object at ffff8880099e73a0 [ 62.536262] which belongs to the cache vm_area_struct of size 168 [ 62.537859] The buggy address is located 88 bytes inside of [ 62.537859] freed 168-byte region [ffff8880099e73a0, ffff8880099e7448) [ 62.539373] [ 62.539606] The buggy address belongs to the physical page: [ 62.540305] page:000000001c49d3f4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99e7 [ 62.541467] memcg:ffff888019c74601 [ 62.541930] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.542624] page_type: 0xffffffff() [ 62.543105] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 62.544094] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c74601 [ 62.545058] page dumped because: kasan: bad access detected [ 62.545751] [ 62.545979] Memory state around the buggy address: [ 62.546592] ffff8880099e7280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 62.547509] ffff8880099e7300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 62.548419] >ffff8880099e7380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 62.549332] ^ [ 62.550225] ffff8880099e7400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 62.551135] ffff8880099e7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.552033] ================================================================== [ 62.553158] Disabling lock debugging due to kernel taint [ 64.555451] BUG: Bad rss-counter state mm:00000000fc4195b6 type:MM_FILEPAGES val:33 [ 64.557154] BUG: Bad rss-counter state mm:00000000fc4195b6 type:MM_ANONPAGES val:22 [ 65.113376] BUG: Bad rss-counter state mm:000000006ad12e4f type:MM_FILEPAGES val:33 [ 65.114543] BUG: Bad rss-counter state mm:000000006ad12e4f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59574' (ECDSA) to the list of known hosts. 2023/06/20 07:33:24 fuzzer started 2023/06/20 07:33:24 dialing manager at localhost:44161 2023/06/20 07:33:24 checking machine... 2023/06/20 07:33:24 checking revisions... [ 65.750570] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:33:24 testing simple program... [ 65.807189] cgroup: Unknown subsys name 'net' [ 65.864037] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:32:53 Registers: info registers vcpu 0 RAX=1ffff110039b66f7 RBX=ffff88801cdb3788 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801cdb37b8 RBP=ffff8880199b79c0 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff8880199baa00 R14=ffffffff818d9dc6 R15=ffff88800d6f2b00 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 00007fb835003700 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=00007f9e5c9a1618 CR3=000000000df94000 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=2034323a33333a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a33333a3730203032 XMM08=3d656e696c646d632022656369767265 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=0000000000000001 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=00007f2727b66500 CR3=000000000946c000 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=1054890637b16eb7534e65b8747c8b70 XMM02=000000000011f920ec2efd57dc4c00df XMM03=00000000001240c08cac23a9de196b0f XMM04=e9495e7164749ed200000000000ae988 XMM05=14f9527a98851d530000000000134a20 XMM06=c291bd5c70af25b90000000000133ac0 XMM07=e042d86d42eb936e0000000000124340 XMM08=8cac23a9de196b0f000000000011f980 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000