syzkaller login: [ 31.417398] BUG: Bad rss-counter state mm:0000000062b65a0a type:MM_FILEPAGES val:33 [ 31.418588] BUG: Bad rss-counter state mm:0000000062b65a0a type:MM_ANONPAGES val:22 [ 31.456387] ================================================================== [ 31.457427] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.458392] Read of size 8 at addr ffff88800972b968 by task sshd/222 [ 31.459164] [ 31.459382] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.460254] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.461236] Call Trace: [ 31.461549] [ 31.461834] dump_stack_lvl+0x91/0xf0 [ 31.462325] print_report+0xcc/0x620 [ 31.462812] ? __virt_addr_valid+0x102/0x340 [ 31.463373] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.463993] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.464627] kasan_report+0xbe/0xf0 [ 31.465106] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.465729] vma_interval_tree_remove+0xc75/0xec0 [ 31.466331] vma_prepare+0xc54/0x11a0 [ 31.466821] __split_vma+0x5af/0x950 [ 31.467288] ? __pfx___split_vma+0x10/0x10 [ 31.467823] ? find_held_lock+0x2c/0x110 [ 31.468344] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.468939] ? lock_is_held_type+0x9f/0x120 [ 31.469476] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.470077] ? mtree_range_walk+0x632/0x900 [ 31.470633] ? mas_walk+0x5c7/0x7c0 [ 31.471109] do_vmi_munmap+0x1f1/0x2b0 [ 31.471600] mmap_region+0x1f9/0x2660 [ 31.472080] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.472603] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.473314] ? __pfx_lock_acquire+0x10/0x10 [ 31.473846] ? __pfx_mmap_region+0x10/0x10 [ 31.474380] ? security_mmap_addr+0x7d/0xa0 [ 31.474931] ? get_unmapped_area+0x1f5/0x3f0 [ 31.475479] do_mmap+0x854/0xf00 [ 31.475918] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.476406] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.476980] ksys_mmap_pgoff+0x3af/0x500 [ 31.477492] do_syscall_64+0x3f/0x90 [ 31.477974] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.478620] RIP: 0033:0x7f102d86dd82 [ 31.479078] 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 [ 31.481215] RSP: 002b:00007ffdaa685dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.482109] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f102d86dd82 [ 31.482955] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f102cca7000 [ 31.483901] RBP: 00007f102cca7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.484777] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563c02e82b20 [ 31.485611] R13: 00007ffdaa685df0 R14: 00007ffdaa685e20 R15: 00007ffdaa686180 [ 31.486494] [ 31.486789] [ 31.487006] Allocated by task 215: [ 31.487427] kasan_save_stack+0x22/0x50 [ 31.487933] kasan_set_track+0x25/0x30 [ 31.488425] __kasan_slab_alloc+0x59/0x70 [ 31.488971] kmem_cache_alloc+0x16b/0x370 [ 31.489491] vm_area_dup+0x20/0x160 [ 31.489951] __split_vma+0x170/0x950 [ 31.490412] split_vma+0xc6/0x110 [ 31.490854] mprotect_fixup+0x8d2/0xb30 [ 31.491356] do_mprotect_pkey+0x87e/0xd40 [ 31.491886] __x64_sys_mprotect+0x78/0xc0 [ 31.492405] do_syscall_64+0x3f/0x90 [ 31.492891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.493522] [ 31.493734] Freed by task 215: [ 31.494129] kasan_save_stack+0x22/0x50 [ 31.494640] kasan_set_track+0x25/0x30 [ 31.495134] kasan_save_free_info+0x2b/0x50 [ 31.495671] __kasan_slab_free+0x10a/0x190 [ 31.496201] kmem_cache_free+0x10d/0x4d0 [ 31.496729] rcu_core+0x8c8/0x2860 [ 31.497176] __do_softirq+0x1b7/0x7d4 [ 31.497651] [ 31.497867] Last potentially related work creation: [ 31.498463] kasan_save_stack+0x22/0x50 [ 31.498973] __kasan_record_aux_stack+0x8e/0xa0 [ 31.499549] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.500185] remove_vma+0x139/0x170 [ 31.500658] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.501223] do_vmi_munmap+0x1f1/0x2b0 [ 31.501709] __vm_munmap+0x138/0x3a0 [ 31.502170] __x64_sys_munmap+0x59/0x80 [ 31.502681] do_syscall_64+0x3f/0x90 [ 31.503157] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.503801] [ 31.504016] The buggy address belongs to the object at ffff88800972b910 [ 31.504016] which belongs to the cache vm_area_struct of size 168 [ 31.505485] The buggy address is located 88 bytes inside of [ 31.505485] freed 168-byte region [ffff88800972b910, ffff88800972b9b8) [ 31.506881] [ 31.507097] The buggy address belongs to the physical page: [ 31.507753] page:0000000029f5a826 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x972b [ 31.508833] memcg:ffff888015c64001 [ 31.509259] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.509903] page_type: 0xffffffff() [ 31.510350] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.511258] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015c64001 [ 31.512168] page dumped because: kasan: bad access detected [ 31.512843] [ 31.513059] Memory state around the buggy address: [ 31.513651] ffff88800972b800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.514497] ffff88800972b880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.515346] >ffff88800972b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.516203] ^ [ 31.516987] ffff88800972b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.517839] ffff88800972ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.518684] ================================================================== [ 31.519993] Disabling lock debugging due to kernel taint [ 33.668496] BUG: Bad rss-counter state mm:000000001a71bdec type:MM_FILEPAGES val:33 [ 33.669688] BUG: Bad rss-counter state mm:000000001a71bdec type:MM_ANONPAGES val:22 [ 34.085577] BUG: Bad rss-counter state mm:000000009448ea61 type:MM_FILEPAGES val:33 [ 34.086634] BUG: Bad rss-counter state mm:000000009448ea61 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44788' (ECDSA) to the list of known hosts. 2023/06/21 04:12:03 fuzzer started 2023/06/21 04:12:04 dialing manager at localhost:36067 2023/06/21 04:12:04 checking machine... 2023/06/21 04:12:04 checking revisions... [ 34.842811] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:12:04 testing simple program... [ 34.898408] cgroup: Unknown subsys name 'net' [ 34.938436] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:12:03 Registers: info registers vcpu 0 RAX=00000000000001c0 RBX=0000000000000006 RCX=0000000000000007 RDX=1ffff1100fffb8f0 RSI=1ffff1100fffb8e7 RDI=ffff88807ffdc780 RBP=ffff88807ffdc780 RSP=ffff888008d9fb20 R8 =0000000000000000 R9 =ffff88807ffdc7b0 R10=ffffea000076a030 R11=000000000001da80 R12=ffff88807ffdc780 R13=ffffea000076b000 R14=ffffea000076b008 R15=ffff88807ffdc500 RIP=ffffffff81789dc1 RFL=00000012 [----A--] 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=00007f24aea7f650 CR3=000000001c6d6000 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=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 info registers vcpu 1 RAX=00007ffe6b676808 RBX=00000000000af718 RCX=00000000000af718 RDX=0000000000000000 RSI=0000000000000006 RDI=000055a816189290 RBP=00007ffe6b676888 RSP=00007ffe6b6767f8 R8 =0000000000000010 R9 =00007ffe6b676810 R10=0000000000000002 R11=00007fc367e60d40 R12=00000000000af718 R13=000055a816189290 R14=0000000000000006 R15=00007ffe6b676810 RIP=00007fc3694c545f RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc368942900 00000000 00000000 GS =0000 0000000000000000 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=00007fc367d7c8c8 CR3=000000000c7c2000 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=7e8a42789393c4b7000000000011b888 XMM01=98c04652b1e661b67440b66859701911 XMM02=2c67c8bc2e329bc3000000000011bb60 XMM03=fb795ef6d65770560000000000122960 XMM04=9799cc4be44c8ee500000000000ae988 XMM05=59d5b690e0af863b0000000000132810 XMM06=00c3ffa147b8d8570000000000132698 XMM07=e042d86d42eb936e0000000000122be0 XMM08=7e580ddeb5b38a70000000000011bbc0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000