syzkaller login: [ 30.796403] BUG: Bad rss-counter state mm:00000000f4bf49c6 type:MM_FILEPAGES val:33 [ 30.797752] BUG: Bad rss-counter state mm:00000000f4bf49c6 type:MM_ANONPAGES val:22 [ 30.835800] ================================================================== [ 30.836738] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.837697] Read of size 8 at addr ffff88800f28fa50 by task sshd/220 [ 30.838468] [ 30.838692] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.839553] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.840534] Call Trace: [ 30.840852] [ 30.841141] dump_stack_lvl+0x91/0xf0 [ 30.841648] print_report+0xcc/0x620 [ 30.842131] ? __virt_addr_valid+0x102/0x340 [ 30.842692] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.843310] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.843922] kasan_report+0xbe/0xf0 [ 30.844411] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.845039] vma_interval_tree_remove+0xc75/0xec0 [ 30.845655] vma_prepare+0xc54/0x11a0 [ 30.846133] __split_vma+0x5af/0x950 [ 30.846603] ? __pfx___split_vma+0x10/0x10 [ 30.847133] ? find_held_lock+0x2c/0x110 [ 30.847654] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.848219] ? lock_is_held_type+0x9f/0x120 [ 30.848759] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.849398] ? mtree_range_walk+0x632/0x900 [ 30.849950] ? mas_walk+0x5c7/0x7c0 [ 30.850431] do_vmi_munmap+0x1f1/0x2b0 [ 30.850918] mmap_region+0x1f9/0x2660 [ 30.851405] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.851921] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.852633] ? __pfx_lock_acquire+0x10/0x10 [ 30.853168] ? __pfx_mmap_region+0x10/0x10 [ 30.853712] ? security_mmap_addr+0x7d/0xa0 [ 30.854242] ? get_unmapped_area+0x1f5/0x3f0 [ 30.854797] do_mmap+0x854/0xf00 [ 30.855235] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.855737] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.856301] ksys_mmap_pgoff+0x3af/0x500 [ 30.856805] do_syscall_64+0x3f/0x90 [ 30.857302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.857973] RIP: 0033:0x7f2bba15ed82 [ 30.858454] 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 [ 30.860629] RSP: 002b:00007ffc9045a868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.861544] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2bba15ed82 [ 30.862388] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2bb9598000 [ 30.863432] RBP: 00007f2bb9598000 R08: 0000000000000009 R09: 0000000000001000 [ 30.864281] R10: 0000000000000812 R11: 0000000000000206 R12: 000056530459fb20 [ 30.865137] R13: 00007ffc9045a880 R14: 00007ffc9045a8b0 R15: 00007ffc9045ac10 [ 30.865999] [ 30.866288] [ 30.866503] Allocated by task 213: [ 30.866926] kasan_save_stack+0x22/0x50 [ 30.867436] kasan_set_track+0x25/0x30 [ 30.867927] __kasan_slab_alloc+0x59/0x70 [ 30.868451] kmem_cache_alloc+0x16b/0x370 [ 30.868965] vm_area_dup+0x20/0x160 [ 30.869434] __split_vma+0x170/0x950 [ 30.869897] split_vma+0xc6/0x110 [ 30.870338] mprotect_fixup+0x8d2/0xb30 [ 30.870839] do_mprotect_pkey+0x87e/0xd40 [ 30.871361] __x64_sys_mprotect+0x78/0xc0 [ 30.871878] do_syscall_64+0x3f/0x90 [ 30.872352] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.872996] [ 30.873209] Freed by task 13: [ 30.873599] kasan_save_stack+0x22/0x50 [ 30.874099] kasan_set_track+0x25/0x30 [ 30.874603] kasan_save_free_info+0x2b/0x50 [ 30.875140] __kasan_slab_free+0x10a/0x190 [ 30.875673] kmem_cache_free+0x10d/0x4d0 [ 30.876197] rcu_core+0x8c8/0x2860 [ 30.876652] __do_softirq+0x1b7/0x7d4 [ 30.877132] [ 30.877362] Last potentially related work creation: [ 30.877958] kasan_save_stack+0x22/0x50 [ 30.878456] __kasan_record_aux_stack+0x8e/0xa0 [ 30.879031] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.879673] remove_vma+0x139/0x170 [ 30.880120] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.880673] do_vmi_munmap+0x1f1/0x2b0 [ 30.881165] __vm_munmap+0x138/0x3a0 [ 30.881651] __x64_sys_munmap+0x59/0x80 [ 30.882145] do_syscall_64+0x3f/0x90 [ 30.882625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.883269] [ 30.883491] The buggy address belongs to the object at ffff88800f28f9f8 [ 30.883491] which belongs to the cache vm_area_struct of size 168 [ 30.884950] The buggy address is located 88 bytes inside of [ 30.884950] freed 168-byte region [ffff88800f28f9f8, ffff88800f28faa0) [ 30.886373] [ 30.886592] The buggy address belongs to the physical page: [ 30.887257] page:00000000ded99d0b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf28f [ 30.888333] memcg:ffff88800e053901 [ 30.888758] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.889409] page_type: 0xffffffff() [ 30.889863] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bcb00 dead000000000008 [ 30.890772] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e053901 [ 30.891677] page dumped because: kasan: bad access detected [ 30.892332] [ 30.892546] Memory state around the buggy address: [ 30.893133] ffff88800f28f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.894006] ffff88800f28f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.894857] >ffff88800f28fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.895708] ^ [ 30.896410] ffff88800f28fa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.897286] ffff88800f28fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.898138] ================================================================== [ 30.899246] Disabling lock debugging due to kernel taint [ 33.077692] BUG: Bad rss-counter state mm:0000000042df0b4f type:MM_FILEPAGES val:33 [ 33.079013] BUG: Bad rss-counter state mm:0000000042df0b4f type:MM_ANONPAGES val:22 [ 33.519464] BUG: Bad rss-counter state mm:00000000aaa6140e type:MM_FILEPAGES val:33 [ 33.520728] BUG: Bad rss-counter state mm:00000000aaa6140e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60705' (ECDSA) to the list of known hosts. 2023/06/20 22:11:39 fuzzer started 2023/06/20 22:11:39 dialing manager at localhost:36067 2023/06/20 22:11:39 checking machine... 2023/06/20 22:11:39 checking revisions... [ 34.255003] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:11:40 testing simple program... [ 34.306050] cgroup: Unknown subsys name 'net' [ 34.356224] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:11:39 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800d5021b0 RCX=ffffffff81846775 RDX=1ffff11001aa0436 RSI=0000000000000000 RDI=ffff88800d5021b0 RBP=0000000000000000 RSP=ffff88801ce47cd0 R8 =0000000000000001 R9 =ffffed1001aa0438 R10=ffff88800d5021c3 R11=0000000000000001 R12=ffffffff81845e00 R13=ffffea0000574c00 R14=ffffffff818937f2 R15=dffffc0000000000 RIP=ffffffff811430ca 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 00007fdc0cc6d900 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=00007fdc0d2250b0 CR3=000000001a31c000 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=0000000000000000 RBX=ffff888000000f78 RCX=ffffffff8175d005 RDX=ffff888014591b40 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000043 RSP=ffff88801470fcf8 R8 =0000000000000007 R9 =0000000000000000 R10=ffff88800c817f78 R11=0000000000000000 R12=000000000c817067 R13=ffff88800c817f78 R14=ffff88801470fdf0 R15=0000000000000000 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2e67762900 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=00007f2e66beffe8 CR3=000000000c5fa000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8b9219bbae9393b900000000000ae988 XMM05=bc9228b7b1bcc3320000000000132928 XMM06=19e9129bd510f23500000000001317e0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000