syzkaller login: [ 36.421122] BUG: Bad rss-counter state mm:00000000f483667b type:MM_FILEPAGES val:33 [ 36.422331] BUG: Bad rss-counter state mm:00000000f483667b type:MM_ANONPAGES val:22 [ 36.545902] ================================================================== [ 36.546992] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.548113] Read of size 8 at addr ffff88800d804228 by task sshd/220 [ 36.549190] [ 36.549456] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.550079] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.550631] Call Trace: [ 36.550813] [ 36.550971] dump_stack_lvl+0x91/0xf0 [ 36.551257] print_report+0xcc/0x620 [ 36.551529] ? __virt_addr_valid+0x102/0x340 [ 36.551851] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.552205] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.552557] kasan_report+0xbe/0xf0 [ 36.552833] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.553178] vma_interval_tree_remove+0xc75/0xec0 [ 36.553519] vma_prepare+0xc54/0x11a0 [ 36.553787] __split_vma+0x5af/0x950 [ 36.554052] ? __pfx___split_vma+0x10/0x10 [ 36.554350] ? find_held_lock+0x2c/0x110 [ 36.554651] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.554988] ? lock_is_held_type+0x9f/0x120 [ 36.555314] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.555693] ? mtree_range_walk+0x632/0x900 [ 36.556024] ? mas_walk+0x5c7/0x7c0 [ 36.556323] do_vmi_munmap+0x1f1/0x2b0 [ 36.556623] mmap_region+0x1f9/0x2660 [ 36.556918] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.557229] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.557666] ? __pfx_lock_acquire+0x10/0x10 [ 36.557993] ? __pfx_mmap_region+0x10/0x10 [ 36.558316] ? security_mmap_addr+0x7d/0xa0 [ 36.558634] ? get_unmapped_area+0x1f5/0x3f0 [ 36.558963] do_mmap+0x854/0xf00 [ 36.559222] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.559514] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.559847] ksys_mmap_pgoff+0x3af/0x500 [ 36.560145] do_syscall_64+0x3f/0x90 [ 36.560438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.560846] RIP: 0033:0x7f5466998d82 [ 36.561123] 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 [ 36.562439] RSP: 002b:00007ffef37f17f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.562994] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5466998d82 [ 36.563472] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5465dd2000 [ 36.563987] RBP: 00007f5465dd2000 R08: 0000000000000009 R09: 0000000000001000 [ 36.564509] R10: 0000000000000812 R11: 0000000000000206 R12: 00005632a47b4ec0 [ 36.565045] R13: 00007ffef37f1810 R14: 00007ffef37f1840 R15: 00007ffef37f1ba0 [ 36.565555] [ 36.565728] [ 36.565853] Allocated by task 213: [ 36.566110] kasan_save_stack+0x22/0x50 [ 36.566410] kasan_set_track+0x25/0x30 [ 36.566703] __kasan_slab_alloc+0x59/0x70 [ 36.567018] kmem_cache_alloc+0x16b/0x370 [ 36.567326] vm_area_dup+0x20/0x160 [ 36.567607] __split_vma+0x170/0x950 [ 36.567887] split_vma+0xc6/0x110 [ 36.568150] mprotect_fixup+0x8d2/0xb30 [ 36.568451] do_mprotect_pkey+0x87e/0xd40 [ 36.568773] __x64_sys_mprotect+0x78/0xc0 [ 36.569084] do_syscall_64+0x3f/0x90 [ 36.569361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.569735] [ 36.569863] Freed by task 213: [ 36.570089] kasan_save_stack+0x22/0x50 [ 36.570382] kasan_set_track+0x25/0x30 [ 36.570676] kasan_save_free_info+0x2b/0x50 [ 36.570995] __kasan_slab_free+0x10a/0x190 [ 36.571308] kmem_cache_free+0x10d/0x4d0 [ 36.571613] rcu_core+0x8c8/0x2860 [ 36.571874] __do_softirq+0x1b7/0x7d4 [ 36.572158] [ 36.572281] Last potentially related work creation: [ 36.572637] kasan_save_stack+0x22/0x50 [ 36.572936] __kasan_record_aux_stack+0x8e/0xa0 [ 36.573277] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.573658] remove_vma+0x139/0x170 [ 36.573925] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.574251] do_vmi_munmap+0x1f1/0x2b0 [ 36.574539] __vm_munmap+0x138/0x3a0 [ 36.574816] __x64_sys_munmap+0x59/0x80 [ 36.575110] do_syscall_64+0x3f/0x90 [ 36.575391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.575768] [ 36.575896] The buggy address belongs to the object at ffff88800d8041d0 [ 36.575896] which belongs to the cache vm_area_struct of size 168 [ 36.576759] The buggy address is located 88 bytes inside of [ 36.576759] freed 168-byte region [ffff88800d8041d0, ffff88800d804278) [ 36.577607] [ 36.577733] The buggy address belongs to the physical page: [ 36.578131] page:00000000e02fcd3a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd804 [ 36.578776] memcg:ffff88800e354d01 [ 36.579030] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.579413] page_type: 0xffffffff() [ 36.579687] raw: 0100000000000200 ffff8880087a0c80 ffffea000038c7c0 dead000000000002 [ 36.580226] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e354d01 [ 36.580782] page dumped because: kasan: bad access detected [ 36.581168] [ 36.581296] Memory state around the buggy address: [ 36.581644] ffff88800d804100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.582162] ffff88800d804180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 36.582672] >ffff88800d804200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 36.583181] ^ [ 36.583517] ffff88800d804280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 36.584027] ffff88800d804300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 36.584540] ================================================================== [ 36.585095] Disabling lock debugging due to kernel taint [ 38.818190] BUG: Bad rss-counter state mm:00000000f5e4ff78 type:MM_FILEPAGES val:33 [ 38.819194] BUG: Bad rss-counter state mm:00000000f5e4ff78 type:MM_ANONPAGES val:22 [ 39.277657] BUG: Bad rss-counter state mm:00000000fd89df2e type:MM_FILEPAGES val:33 [ 39.278672] BUG: Bad rss-counter state mm:00000000fd89df2e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39049' (ECDSA) to the list of known hosts. 2023/06/20 22:12:31 fuzzer started 2023/06/20 22:12:31 dialing manager at localhost:36067 2023/06/20 22:12:31 checking machine... 2023/06/20 22:12:31 checking revisions... [ 40.003764] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:12:31 testing simple program... [ 40.053661] cgroup: Unknown subsys name 'net' [ 40.116690] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:12:31 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff1100205ae79 RSI=ffffffff8180c5af RDI=ffff8880102d7438 RBP=ffff8880102d7408 RSP=ffff8880102d7368 R8 =ffffffff86138eb4 R9 =ffff8880102d73b0 R10=0000000000038001 R11=0000000000020d9c R12=ffff8880102d7438 R13=0000000000000000 R14=ffff8880090dd1c0 R15=0000000000002000 RIP=ffffffff813ad47e RFL=00000286 [--S--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 00007f22757c0900 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=00007ffd423a5ff8 CR3=000000000c622000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f3802b29110 CR3=000000000e10e000 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=2031333a32313a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a32313a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000