syzkaller login: [ 57.665946] BUG: Bad rss-counter state mm:000000003f829370 type:MM_FILEPAGES val:33 [ 57.667182] BUG: Bad rss-counter state mm:000000003f829370 type:MM_ANONPAGES val:22 [ 57.704395] ================================================================== [ 57.705388] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 57.706496] Read of size 8 at addr ffff88800e6a7140 by task sshd/219 [ 57.707340] [ 57.707558] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 57.708558] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 57.709527] Call Trace: [ 57.709853] [ 57.710147] dump_stack_lvl+0x91/0xf0 [ 57.710644] print_report+0xcc/0x620 [ 57.711139] ? __virt_addr_valid+0x102/0x340 [ 57.711705] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.712371] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.712983] kasan_report+0xbe/0xf0 [ 57.713462] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.714078] vma_interval_tree_remove+0xc75/0xec0 [ 57.714694] vma_prepare+0xc54/0x11a0 [ 57.715170] __split_vma+0x5af/0x950 [ 57.715640] ? __pfx___split_vma+0x10/0x10 [ 57.716165] ? find_held_lock+0x2c/0x110 [ 57.716681] do_vmi_align_munmap+0x2ba/0x11f0 [ 57.717239] ? lock_is_held_type+0x9f/0x120 [ 57.717774] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 57.718386] ? mtree_range_walk+0x632/0x900 [ 57.718964] ? mas_walk+0x5c7/0x7c0 [ 57.719431] do_vmi_munmap+0x1f1/0x2b0 [ 57.719923] mmap_region+0x1f9/0x2660 [ 57.720408] ? vm_mmap_pgoff+0x15c/0x3a0 [ 57.720920] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 57.721639] ? __pfx_lock_acquire+0x10/0x10 [ 57.722172] ? __pfx_mmap_region+0x10/0x10 [ 57.722722] ? security_mmap_addr+0x7d/0xa0 [ 57.723362] ? get_unmapped_area+0x1f5/0x3f0 [ 57.723897] do_mmap+0x854/0xf00 [ 57.724321] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.724803] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 57.725345] ksys_mmap_pgoff+0x3af/0x500 [ 57.725834] do_syscall_64+0x3f/0x90 [ 57.726293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.726926] RIP: 0033:0x7f765be99d82 [ 57.727370] 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 [ 57.729427] RSP: 002b:00007ffdbd011288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 57.730298] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f765be99d82 [ 57.731139] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f765b2d3000 [ 57.731955] RBP: 00007f765b2d3000 R08: 0000000000000009 R09: 0000000000001000 [ 57.732901] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f91d0c3ec0 [ 57.733728] R13: 00007ffdbd0112a0 R14: 00007ffdbd0112d0 R15: 00007ffdbd011630 [ 57.734567] [ 57.734853] [ 57.735070] Allocated by task 212: [ 57.735484] kasan_save_stack+0x22/0x50 [ 57.735975] kasan_set_track+0x25/0x30 [ 57.736454] __kasan_slab_alloc+0x59/0x70 [ 57.736961] kmem_cache_alloc+0x16b/0x370 [ 57.737464] vm_area_dup+0x20/0x160 [ 57.737903] __split_vma+0x170/0x950 [ 57.738355] split_vma+0xc6/0x110 [ 57.738802] mprotect_fixup+0x8d2/0xb30 [ 57.739291] do_mprotect_pkey+0x87e/0xd40 [ 57.739800] __x64_sys_mprotect+0x78/0xc0 [ 57.740303] do_syscall_64+0x3f/0x90 [ 57.740764] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.741384] [ 57.741592] Freed by task 202: [ 57.741969] kasan_save_stack+0x22/0x50 [ 57.742467] kasan_set_track+0x25/0x30 [ 57.742945] kasan_save_free_info+0x2b/0x50 [ 57.743460] __kasan_slab_free+0x10a/0x190 [ 57.743976] kmem_cache_free+0x10d/0x4d0 [ 57.744467] rcu_core+0x8c8/0x2860 [ 57.744897] __do_softirq+0x1b7/0x7d4 [ 57.745354] [ 57.745563] Last potentially related work creation: [ 57.746129] kasan_save_stack+0x22/0x50 [ 57.746623] __kasan_record_aux_stack+0x8e/0xa0 [ 57.747178] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.747794] remove_vma+0x139/0x170 [ 57.748229] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.748769] do_vmi_munmap+0x1f1/0x2b0 [ 57.749237] __vm_munmap+0x138/0x3a0 [ 57.749689] __x64_sys_munmap+0x59/0x80 [ 57.750170] do_syscall_64+0x3f/0x90 [ 57.750639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.751261] [ 57.751473] The buggy address belongs to the object at ffff88800e6a70e8 [ 57.751473] which belongs to the cache vm_area_struct of size 168 [ 57.752893] The buggy address is located 88 bytes inside of [ 57.752893] freed 168-byte region [ffff88800e6a70e8, ffff88800e6a7190) [ 57.754245] [ 57.754461] The buggy address belongs to the physical page: [ 57.755096] page:00000000aff590c7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6a7 [ 57.756141] memcg:ffff88800e19f301 [ 57.756553] flags: 0x100000000000200(slab|node=0|zone=1) [ 57.757184] page_type: 0xffffffff() [ 57.757621] raw: 0100000000000200 ffff88800879fc80 ffffea00003a6b80 dead000000000004 [ 57.758527] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e19f301 [ 57.759405] page dumped because: kasan: bad access detected [ 57.760044] [ 57.760255] Memory state around the buggy address: [ 57.760818] ffff88800e6a7000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 57.761644] ffff88800e6a7080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 57.762483] >ffff88800e6a7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 57.763334] ^ [ 57.763950] ffff88800e6a7180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 57.764771] ffff88800e6a7200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 57.765591] ================================================================== [ 57.766649] Disabling lock debugging due to kernel taint [ 60.016282] BUG: Bad rss-counter state mm:000000001a423bcc type:MM_FILEPAGES val:33 [ 60.017287] BUG: Bad rss-counter state mm:000000001a423bcc type:MM_ANONPAGES val:22 [ 60.488025] BUG: Bad rss-counter state mm:0000000071cb6a35 type:MM_FILEPAGES val:33 [ 60.488971] BUG: Bad rss-counter state mm:0000000071cb6a35 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19188' (ECDSA) to the list of known hosts. 2023/06/20 03:11:32 fuzzer started 2023/06/20 03:11:33 dialing manager at localhost:44161 2023/06/20 03:11:33 checking machine... 2023/06/20 03:11:33 checking revisions... [ 61.258805] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:11:33 testing simple program... [ 61.302358] cgroup: Unknown subsys name 'net' [ 61.355811] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:11:13 Registers: info registers vcpu 0 RAX=ffff888018e80000 RBX=ffff888018e805f0 RCX=00000000800d000b RDX=00000000800d000c RSI=ffff888018e805f0 RDI=ffff88800844f780 RBP=ffff88800b8ffb78 RSP=ffff88800b8ffae0 R8 =00000000800d000b R9 =0000000000000000 R10=ffffea000063a000 R11=00000000800d0006 R12=ffffea000063a000 R13=ffff888018e80000 R14=00000000800d000b R15=ffff88800844f780 RIP=ffffffff818095bf RFL=00000242 [---Z---] 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 00007f9c4a445900 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=00007ffca91ffd4c CR3=000000000eb68000 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=00000000000000000000000000000000 XMM02=000000000000000000000000000000ff XMM03=7a3c075121ba836dc695fbde3c182927 XMM04=9de65a3e288e8b6ff3d0c708f9b691f8 XMM05=000000000000000000000000000000ff XMM06=7a3c073e218e836dc695c7083c182927 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f2dd560e580 CR3=000000000d5be000 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=00000000000000000000000000000000 XMM01=1f0e5269bfdd06be9d4f17e7838d87d7 XMM02=000000000011fcb8eff9b2d0a8fce9cb XMM03=000000000011fd882c67c8bc2e329bc3 XMM04=47aabfd0c638c09d00000000000ae988 XMM05=dfcdbad4f1609c3700000000001348b0 XMM06=577e7cbf8cec15c80000000000133a88 XMM07=e042d86d42eb936e0000000000125a68 XMM08=891abed4dc929a0c000000000011fd88 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000