syzkaller login: [ 30.521281] BUG: Bad rss-counter state mm:0000000029333d24 type:MM_FILEPAGES val:33 [ 30.522865] BUG: Bad rss-counter state mm:0000000029333d24 type:MM_ANONPAGES val:22 [ 30.682335] ================================================================== [ 30.683254] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.684202] Read of size 8 at addr ffff88801a166df0 by task sshd/220 [ 30.684963] [ 30.685180] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.686160] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.687172] Call Trace: [ 30.687491] [ 30.687881] dump_stack_lvl+0x91/0xf0 [ 30.688406] print_report+0xcc/0x620 [ 30.688896] ? __virt_addr_valid+0x102/0x340 [ 30.689460] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.690078] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.690707] kasan_report+0xbe/0xf0 [ 30.691177] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.691801] vma_interval_tree_remove+0xc75/0xec0 [ 30.692417] vma_prepare+0xc54/0x11a0 [ 30.692909] __split_vma+0x5af/0x950 [ 30.693379] ? __pfx___split_vma+0x10/0x10 [ 30.693917] ? find_held_lock+0x2c/0x110 [ 30.694453] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.695019] ? lock_is_held_type+0x9f/0x120 [ 30.695565] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.696196] ? mtree_range_walk+0x632/0x900 [ 30.696750] ? mas_walk+0x5c7/0x7c0 [ 30.697229] do_vmi_munmap+0x1f1/0x2b0 [ 30.697720] mmap_region+0x1f9/0x2660 [ 30.698201] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.698708] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.699427] ? __pfx_lock_acquire+0x10/0x10 [ 30.699979] ? __pfx_mmap_region+0x10/0x10 [ 30.700526] ? security_mmap_addr+0x7d/0xa0 [ 30.701070] ? get_unmapped_area+0x1f5/0x3f0 [ 30.701614] do_mmap+0x854/0xf00 [ 30.702055] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.702552] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.703116] ksys_mmap_pgoff+0x3af/0x500 [ 30.703625] do_syscall_64+0x3f/0x90 [ 30.704098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.704767] RIP: 0033:0x7fdc90b9dd82 [ 30.705227] 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 [ 30.707350] RSP: 002b:00007ffec5aed3e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.708263] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdc90b9dd82 [ 30.709109] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdc8ffd7000 [ 30.709969] RBP: 00007fdc8ffd7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.710809] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564c15217b20 [ 30.711655] R13: 00007ffec5aed400 R14: 00007ffec5aed430 R15: 00007ffec5aed790 [ 30.712525] [ 30.712817] [ 30.713029] Allocated by task 213: [ 30.713454] kasan_save_stack+0x22/0x50 [ 30.713956] kasan_set_track+0x25/0x30 [ 30.714456] __kasan_slab_alloc+0x59/0x70 [ 30.714982] kmem_cache_alloc+0x16b/0x370 [ 30.715490] vm_area_dup+0x20/0x160 [ 30.715942] __split_vma+0x170/0x950 [ 30.716435] split_vma+0xc6/0x110 [ 30.716876] mprotect_fixup+0x8d2/0xb30 [ 30.717378] do_mprotect_pkey+0x87e/0xd40 [ 30.717894] __x64_sys_mprotect+0x78/0xc0 [ 30.718411] do_syscall_64+0x3f/0x90 [ 30.718881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.719518] [ 30.719736] Freed by task 213: [ 30.720122] kasan_save_stack+0x22/0x50 [ 30.720635] kasan_set_track+0x25/0x30 [ 30.721125] kasan_save_free_info+0x2b/0x50 [ 30.721664] __kasan_slab_free+0x10a/0x190 [ 30.722201] kmem_cache_free+0x10d/0x4d0 [ 30.722713] rcu_core+0x8c8/0x2860 [ 30.723156] __do_softirq+0x1b7/0x7d4 [ 30.723633] [ 30.723848] Last potentially related work creation: [ 30.724440] kasan_save_stack+0x22/0x50 [ 30.724937] __kasan_record_aux_stack+0x8e/0xa0 [ 30.725517] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.726167] remove_vma+0x139/0x170 [ 30.726619] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.727183] do_vmi_munmap+0x1f1/0x2b0 [ 30.727692] __vm_munmap+0x138/0x3a0 [ 30.728171] __x64_sys_munmap+0x59/0x80 [ 30.728672] do_syscall_64+0x3f/0x90 [ 30.729148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.729789] [ 30.730002] The buggy address belongs to the object at ffff88801a166d98 [ 30.730002] which belongs to the cache vm_area_struct of size 168 [ 30.731463] The buggy address is located 88 bytes inside of [ 30.731463] freed 168-byte region [ffff88801a166d98, ffff88801a166e40) [ 30.732867] [ 30.733082] The buggy address belongs to the physical page: [ 30.733731] page:000000007a852c8d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a166 [ 30.734809] memcg:ffff88801a288301 [ 30.735239] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.735884] page_type: 0xffffffff() [ 30.736359] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.737268] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a288301 [ 30.738165] page dumped because: kasan: bad access detected [ 30.738817] [ 30.739033] Memory state around the buggy address: [ 30.739608] ffff88801a166c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.740460] ffff88801a166d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.741327] >ffff88801a166d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.742181] ^ [ 30.742997] ffff88801a166e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.743858] ffff88801a166e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.744724] ================================================================== [ 30.745833] Disabling lock debugging due to kernel taint [ 32.573680] BUG: Bad rss-counter state mm:000000009bfbdd8b type:MM_FILEPAGES val:33 [ 32.574847] BUG: Bad rss-counter state mm:000000009bfbdd8b type:MM_ANONPAGES val:22 [ 32.971260] BUG: Bad rss-counter state mm:000000004c303234 type:MM_FILEPAGES val:33 [ 32.972371] BUG: Bad rss-counter state mm:000000004c303234 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55093' (ECDSA) to the list of known hosts. 2023/06/20 23:44:10 fuzzer started 2023/06/20 23:44:10 dialing manager at localhost:36067 2023/06/20 23:44:10 checking machine... 2023/06/20 23:44:10 checking revisions... [ 33.755397] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:44:11 testing simple program... [ 33.804705] cgroup: Unknown subsys name 'net' [ 33.853782] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:44:10 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff815342db RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81807029 RSP=ffff888016817a88 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffffffff81806f71 R12=ffff88800844f780 R13=ffff88806ce3de20 R14=ffff88806ce3de20 R15=ffff88806ce3de00 RIP=ffffffff8135b935 RFL=00000047 [---Z-PC] 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 00007f4154513900 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=00007f4154ac8650 CR3=000000001b90c000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00005584d6177290 CR3=000000000dd70000 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=2030313a34343a3332203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a34343a3332203032 XMM08=20303d64696720303d64697520612f6e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000