syzkaller login: [ 30.608193] BUG: Bad rss-counter state mm:000000006d1b38f9 type:MM_FILEPAGES val:33 [ 30.609202] BUG: Bad rss-counter state mm:000000006d1b38f9 type:MM_ANONPAGES val:22 [ 30.647666] ================================================================== [ 30.648753] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.649752] Read of size 8 at addr ffff88800edbeed8 by task sshd/220 [ 30.650704] [ 30.650924] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.651961] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.653061] Call Trace: [ 30.653468] [ 30.653778] dump_stack_lvl+0x91/0xf0 [ 30.654347] print_report+0xcc/0x620 [ 30.654899] ? __virt_addr_valid+0x102/0x340 [ 30.655566] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.656288] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.657023] kasan_report+0xbe/0xf0 [ 30.657566] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.658289] vma_interval_tree_remove+0xc75/0xec0 [ 30.658989] vma_prepare+0xc54/0x11a0 [ 30.659497] __split_vma+0x5af/0x950 [ 30.660029] ? __pfx___split_vma+0x10/0x10 [ 30.660666] ? find_held_lock+0x2c/0x110 [ 30.661194] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.661782] ? lock_is_held_type+0x9f/0x120 [ 30.662427] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.663038] ? mtree_range_walk+0x632/0x900 [ 30.663714] ? mas_walk+0x5c7/0x7c0 [ 30.664263] do_vmi_munmap+0x1f1/0x2b0 [ 30.664862] mmap_region+0x1f9/0x2660 [ 30.665412] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.666028] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.666847] ? __pfx_lock_acquire+0x10/0x10 [ 30.667539] ? __pfx_mmap_region+0x10/0x10 [ 30.668124] ? security_mmap_addr+0x7d/0xa0 [ 30.668665] ? get_unmapped_area+0x1f5/0x3f0 [ 30.669218] do_mmap+0x854/0xf00 [ 30.669659] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.670169] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.670728] ksys_mmap_pgoff+0x3af/0x500 [ 30.671244] do_syscall_64+0x3f/0x90 [ 30.671730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.672390] RIP: 0033:0x7f79417a9d82 [ 30.672851] 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 [ 30.675046] RSP: 002b:00007ffcd55bc5f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.675969] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f79417a9d82 [ 30.676857] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7940be3000 [ 30.677720] RBP: 00007f7940be3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.678578] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563798e65980 [ 30.679434] R13: 00007ffcd55bc610 R14: 00007ffcd55bc640 R15: 00007ffcd55bc9a0 [ 30.680311] [ 30.680607] [ 30.680820] Allocated by task 213: [ 30.681253] kasan_save_stack+0x22/0x50 [ 30.681761] kasan_set_track+0x25/0x30 [ 30.682270] __kasan_slab_alloc+0x59/0x70 [ 30.682802] kmem_cache_alloc+0x16b/0x370 [ 30.683322] vm_area_dup+0x20/0x160 [ 30.683781] __split_vma+0x170/0x950 [ 30.684280] split_vma+0xc6/0x110 [ 30.684722] mprotect_fixup+0x8d2/0xb30 [ 30.685238] do_mprotect_pkey+0x87e/0xd40 [ 30.685766] __x64_sys_mprotect+0x78/0xc0 [ 30.686297] do_syscall_64+0x3f/0x90 [ 30.686776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.687431] [ 30.687646] Freed by task 213: [ 30.688048] kasan_save_stack+0x22/0x50 [ 30.688563] kasan_set_track+0x25/0x30 [ 30.689065] kasan_save_free_info+0x2b/0x50 [ 30.689599] __kasan_slab_free+0x10a/0x190 [ 30.690129] kmem_cache_free+0x10d/0x4d0 [ 30.690640] rcu_core+0x8c8/0x2860 [ 30.691094] __do_softirq+0x1b7/0x7d4 [ 30.691579] [ 30.691792] Last potentially related work creation: [ 30.692462] kasan_save_stack+0x22/0x50 [ 30.692971] __kasan_record_aux_stack+0x8e/0xa0 [ 30.693553] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.694199] remove_vma+0x139/0x170 [ 30.694656] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.695217] do_vmi_munmap+0x1f1/0x2b0 [ 30.695737] __vm_munmap+0x138/0x3a0 [ 30.696231] __x64_sys_munmap+0x59/0x80 [ 30.696737] do_syscall_64+0x3f/0x90 [ 30.697221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.697871] [ 30.698087] The buggy address belongs to the object at ffff88800edbee80 [ 30.698087] which belongs to the cache vm_area_struct of size 168 [ 30.699574] The buggy address is located 88 bytes inside of [ 30.699574] freed 168-byte region [ffff88800edbee80, ffff88800edbef28) [ 30.700992] [ 30.701207] The buggy address belongs to the physical page: [ 30.701869] page:00000000aa220cf6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedbe [ 30.702965] memcg:ffff888019c80101 [ 30.703394] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.704054] page_type: 0xffffffff() [ 30.704536] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.705465] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c80101 [ 30.706392] page dumped because: kasan: bad access detected [ 30.707066] [ 30.707283] Memory state around the buggy address: [ 30.707871] ffff88800edbed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.708746] ffff88800edbee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.709616] >ffff88800edbee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.710487] ^ [ 30.711226] ffff88800edbef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.712097] ffff88800edbef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.712990] ================================================================== [ 30.713992] Disabling lock debugging due to kernel taint [ 32.524590] BUG: Bad rss-counter state mm:00000000df16b28d type:MM_FILEPAGES val:33 [ 32.525593] BUG: Bad rss-counter state mm:00000000df16b28d type:MM_ANONPAGES val:22 [ 32.968190] BUG: Bad rss-counter state mm:00000000b2969646 type:MM_FILEPAGES val:33 [ 32.969304] BUG: Bad rss-counter state mm:00000000b2969646 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56915' (ECDSA) to the list of known hosts. 2023/06/20 19:55:24 fuzzer started 2023/06/20 19:55:25 dialing manager at localhost:36067 2023/06/20 19:55:25 checking machine... 2023/06/20 19:55:25 checking revisions... [ 33.649673] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:55:25 testing simple program... [ 33.708344] cgroup: Unknown subsys name 'net' [ 33.776766] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:55:24 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff864b381a RDX=0000000000000008 RSI=ffffffff85407e18 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a20 R8 =ffffffff864b381e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b547f R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407e20 R15=ffff88806ce09a98 RIP=ffffffff811303f0 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 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=00005627828a2290 CR3=0000000005482000 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=00007f7a6bbee510000055827efc7790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85652c60 RCX=ffffffff814c84a1 RDX=ffff88800fdfb680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801030f980 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f1d684a9477 R13=0000000000000000 R14=ffff88800fdfb680 R15=ffff88800dd58720 RIP=ffffffff814c027c 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 00007f1d67fb6900 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=00007f1d6856e0b0 CR3=0000000010298000 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