syzkaller login: [ 63.436806] BUG: Bad rss-counter state mm:0000000071903bc9 type:MM_FILEPAGES val:33 [ 63.437715] BUG: Bad rss-counter state mm:0000000071903bc9 type:MM_ANONPAGES val:22 [ 63.622837] ================================================================== [ 63.624193] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 63.625222] Read of size 8 at addr ffff888015eed4e0 by task sshd/223 [ 63.626100] [ 63.626346] CPU: 1 PID: 223 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 63.627444] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 63.628526] Call Trace: [ 63.628871] [ 63.629181] dump_stack_lvl+0x91/0xf0 [ 63.629714] print_report+0xcc/0x620 [ 63.630235] ? __virt_addr_valid+0x102/0x340 [ 63.630842] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.631508] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.632193] kasan_report+0xbe/0xf0 [ 63.632733] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.633400] vma_interval_tree_remove+0xc75/0xec0 [ 63.634068] vma_prepare+0xc54/0x11a0 [ 63.634577] __split_vma+0x5af/0x950 [ 63.635091] ? __pfx___split_vma+0x10/0x10 [ 63.635673] ? find_held_lock+0x2c/0x110 [ 63.636266] do_vmi_align_munmap+0x2ba/0x11f0 [ 63.636884] ? lock_is_held_type+0x9f/0x120 [ 63.637497] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 63.638148] ? mtree_range_walk+0x632/0x900 [ 63.638750] ? mas_walk+0x5c7/0x7c0 [ 63.639267] do_vmi_munmap+0x1f1/0x2b0 [ 63.639802] mmap_region+0x1f9/0x2660 [ 63.640323] ? vm_mmap_pgoff+0x15c/0x3a0 [ 63.640891] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 63.641671] ? __pfx_lock_acquire+0x10/0x10 [ 63.642251] ? __pfx_mmap_region+0x10/0x10 [ 63.642839] ? security_mmap_addr+0x7d/0xa0 [ 63.643431] ? get_unmapped_area+0x1f5/0x3f0 [ 63.644049] do_mmap+0x854/0xf00 [ 63.644540] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.645075] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 63.645689] ksys_mmap_pgoff+0x3af/0x500 [ 63.646229] do_syscall_64+0x3f/0x90 [ 63.646749] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.647443] RIP: 0033:0x7f3ec65b8d82 [ 63.647955] 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 [ 63.650199] RSP: 002b:00007fffee519c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 63.651168] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3ec65b8d82 [ 63.652093] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3ec59f2000 [ 63.652972] RBP: 00007f3ec59f2000 R08: 0000000000000009 R09: 0000000000001000 [ 63.653835] R10: 0000000000000812 R11: 0000000000000206 R12: 00005643342c5ec0 [ 63.654685] R13: 00007fffee519c90 R14: 00007fffee519cc0 R15: 00007fffee51a020 [ 63.655555] [ 63.655868] [ 63.656085] Allocated by task 216: [ 63.656532] kasan_save_stack+0x22/0x50 [ 63.657092] kasan_set_track+0x25/0x30 [ 63.657618] __kasan_slab_alloc+0x59/0x70 [ 63.658153] kmem_cache_alloc+0x16b/0x370 [ 63.658682] vm_area_dup+0x20/0x160 [ 63.659147] __split_vma+0x170/0x950 [ 63.659621] split_vma+0xc6/0x110 [ 63.660086] mprotect_fixup+0x8d2/0xb30 [ 63.660596] do_mprotect_pkey+0x87e/0xd40 [ 63.661120] __x64_sys_mprotect+0x78/0xc0 [ 63.661646] do_syscall_64+0x3f/0x90 [ 63.662145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.662848] [ 63.663073] Freed by task 216: [ 63.663471] kasan_save_stack+0x22/0x50 [ 63.664105] kasan_set_track+0x25/0x30 [ 63.664604] kasan_save_free_info+0x2b/0x50 [ 63.665138] __kasan_slab_free+0x10a/0x190 [ 63.665682] kmem_cache_free+0x10d/0x4d0 [ 63.666197] rcu_core+0x8c8/0x2860 [ 63.666651] __do_softirq+0x1b7/0x7d4 [ 63.667131] [ 63.667349] Last potentially related work creation: [ 63.668022] kasan_save_stack+0x22/0x50 [ 63.668574] __kasan_record_aux_stack+0x8e/0xa0 [ 63.669163] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.669805] remove_vma+0x139/0x170 [ 63.670260] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.670815] do_vmi_munmap+0x1f1/0x2b0 [ 63.671298] __vm_munmap+0x138/0x3a0 [ 63.671782] __x64_sys_munmap+0x59/0x80 [ 63.672292] do_syscall_64+0x3f/0x90 [ 63.672792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.673508] [ 63.673751] The buggy address belongs to the object at ffff888015eed488 [ 63.673751] which belongs to the cache vm_area_struct of size 168 [ 63.675351] The buggy address is located 88 bytes inside of [ 63.675351] freed 168-byte region [ffff888015eed488, ffff888015eed530) [ 63.676951] [ 63.677194] The buggy address belongs to the physical page: [ 63.677920] page:000000004fb8e88f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15eed [ 63.679119] memcg:ffff888015ee4201 [ 63.679578] flags: 0x100000000000200(slab|node=0|zone=1) [ 63.680258] page_type: 0xffffffff() [ 63.680768] raw: 0100000000000200 ffff88800879fc80 ffffea00003822c0 dead000000000002 [ 63.681774] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ee4201 [ 63.682730] page dumped because: kasan: bad access detected [ 63.683468] [ 63.683686] Memory state around the buggy address: [ 63.684321] ffff888015eed380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 63.685239] ffff888015eed400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 63.686149] >ffff888015eed480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.687074] ^ [ 63.687932] ffff888015eed500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 63.688869] ffff888015eed580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 63.689796] ================================================================== [ 63.690811] Disabling lock debugging due to kernel taint [ 65.207320] BUG: Bad rss-counter state mm:0000000044941767 type:MM_FILEPAGES val:33 [ 65.208122] BUG: Bad rss-counter state mm:0000000044941767 type:MM_ANONPAGES val:22 [ 65.674483] BUG: Bad rss-counter state mm:00000000179af923 type:MM_FILEPAGES val:33 [ 65.675781] BUG: Bad rss-counter state mm:00000000179af923 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11292' (ECDSA) to the list of known hosts. 2023/06/19 19:37:34 fuzzer started 2023/06/19 19:37:35 dialing manager at localhost:44161 2023/06/19 19:37:35 checking machine... 2023/06/19 19:37:35 checking revisions... [ 66.297091] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:37:35 testing simple program... [ 66.331285] cgroup: Unknown subsys name 'net' [ 66.370078] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:37:02 Registers: info registers vcpu 0 RAX=ffffffff863dbc36 RBX=0000000000000001 RCX=ffffffff83863942 RDX=0000000000000000 RSI=ffffffff863dbc36 RDI=ffffffff85fbf970 RBP=ffff88806ce09aa8 RSP=ffff88806ce099c8 R8 =ffffffff863dbc36 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000091967 R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcbd RFL=00000282 [--S----] 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 00007fb9a96a0900 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=00007fb9a9c580b0 CR3=000000000d69c000 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=2034333a37333a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a37333a3931203931 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=00007f498befe000 CR3=0000000009968000 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=3e13f02bad1d7d90d74664e98cd7af04 XMM02=2c67c8bc2e329bc30000000000121c88 XMM03=fb795ef6d65770560000000000128a68 XMM04=50cc5df48093716600000000000ae988 XMM05=5a9d233068761c4a0000000000138ba8 XMM06=564c66b1081e249b0000000000137a10 XMM07=e042d86d42eb936e0000000000128ce8 XMM08=9e31d13e0b28cb5b0000000000121ce8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000