syzkaller login: [ 26.524474] BUG: Bad rss-counter state mm:00000000c8658999 type:MM_FILEPAGES val:33 [ 26.525864] BUG: Bad rss-counter state mm:00000000c8658999 type:MM_ANONPAGES val:22 [ 26.702672] ================================================================== [ 26.703760] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.704995] Read of size 8 at addr ffff88800f550c20 by task sshd/218 [ 26.706154] [ 26.706483] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.707848] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.709055] Call Trace: [ 26.709426] [ 26.709761] dump_stack_lvl+0x91/0xf0 [ 26.710386] print_report+0xcc/0x620 [ 26.710959] ? __virt_addr_valid+0x102/0x340 [ 26.711610] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.712351] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.713110] kasan_report+0xbe/0xf0 [ 26.713649] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.714380] vma_interval_tree_remove+0xc75/0xec0 [ 26.715099] vma_prepare+0xc54/0x11a0 [ 26.715678] __split_vma+0x5af/0x950 [ 26.716239] ? __pfx___split_vma+0x10/0x10 [ 26.716860] ? find_held_lock+0x2c/0x110 [ 26.717494] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.718151] ? lock_is_held_type+0x9f/0x120 [ 26.718769] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.719480] ? mtree_range_walk+0x632/0x900 [ 26.720142] ? mas_walk+0x5c7/0x7c0 [ 26.720690] do_vmi_munmap+0x1f1/0x2b0 [ 26.721288] mmap_region+0x1f9/0x2660 [ 26.721850] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.722451] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.723271] ? __pfx_lock_acquire+0x10/0x10 [ 26.723942] ? __pfx_mmap_region+0x10/0x10 [ 26.724544] ? security_mmap_addr+0x7d/0xa0 [ 26.725188] ? get_unmapped_area+0x1f5/0x3f0 [ 26.725822] do_mmap+0x854/0xf00 [ 26.726340] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.726927] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.727569] ksys_mmap_pgoff+0x3af/0x500 [ 26.728197] do_syscall_64+0x3f/0x90 [ 26.728741] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.729504] RIP: 0033:0x7f702d29cd82 [ 26.730086] 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 [ 26.732634] RSP: 002b:00007ffcc072fb78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.733746] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f702d29cd82 [ 26.734767] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f702c6d6000 [ 26.735793] RBP: 00007f702c6d6000 R08: 0000000000000009 R09: 0000000000001000 [ 26.736800] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d382c69ec0 [ 26.737838] R13: 00007ffcc072fb90 R14: 00007ffcc072fbc0 R15: 00007ffcc072ff20 [ 26.738873] [ 26.739221] [ 26.739471] Allocated by task 211: [ 26.740014] kasan_save_stack+0x22/0x50 [ 26.740609] kasan_set_track+0x25/0x30 [ 26.741206] __kasan_slab_alloc+0x59/0x70 [ 26.741834] kmem_cache_alloc+0x16b/0x370 [ 26.742471] vm_area_dup+0x20/0x160 [ 26.743024] __split_vma+0x170/0x950 [ 26.743585] split_vma+0xc6/0x110 [ 26.744118] mprotect_fixup+0x8d2/0xb30 [ 26.744705] do_mprotect_pkey+0x87e/0xd40 [ 26.745325] __x64_sys_mprotect+0x78/0xc0 [ 26.745972] do_syscall_64+0x3f/0x90 [ 26.746522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.747281] [ 26.747532] Freed by task 19: [ 26.748002] kasan_save_stack+0x22/0x50 [ 26.748591] kasan_set_track+0x25/0x30 [ 26.749171] kasan_save_free_info+0x2b/0x50 [ 26.749792] __kasan_slab_free+0x10a/0x190 [ 26.750438] kmem_cache_free+0x10d/0x4d0 [ 26.751057] rcu_core+0x8c8/0x2860 [ 26.751573] __do_softirq+0x1b7/0x7d4 [ 26.752164] [ 26.752420] Last potentially related work creation: [ 26.753125] kasan_save_stack+0x22/0x50 [ 26.753715] __kasan_record_aux_stack+0x8e/0xa0 [ 26.754424] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.755192] remove_vma+0x139/0x170 [ 26.755730] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.756389] do_vmi_munmap+0x1f1/0x2b0 [ 26.756969] __vm_munmap+0x138/0x3a0 [ 26.757512] __x64_sys_munmap+0x59/0x80 [ 26.758108] do_syscall_64+0x3f/0x90 [ 26.758650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.759416] [ 26.759685] The buggy address belongs to the object at ffff88800f550bc8 [ 26.759685] which belongs to the cache vm_area_struct of size 168 [ 26.761410] The buggy address is located 88 bytes inside of [ 26.761410] freed 168-byte region [ffff88800f550bc8, ffff88800f550c70) [ 26.763084] [ 26.763337] The buggy address belongs to the physical page: [ 26.764127] page:00000000ecde5329 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf550 [ 26.765386] memcg:ffff888019e66c01 [ 26.765901] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.766659] page_type: 0xffffffff() [ 26.767202] raw: 0100000000000200 ffff88800879fc80 ffffea000063b3c0 dead000000000002 [ 26.768313] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e66c01 [ 26.769372] page dumped because: kasan: bad access detected [ 26.770167] [ 26.770416] Memory state around the buggy address: [ 26.771104] ffff88800f550b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.772105] ffff88800f550b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 26.773105] >ffff88800f550c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 26.774117] ^ [ 26.774721] ffff88800f550c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 26.775740] ffff88800f550d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 26.776736] ================================================================== [ 26.777991] Disabling lock debugging due to kernel taint [ 28.865991] BUG: Bad rss-counter state mm:0000000092f7f8ae type:MM_FILEPAGES val:33 [ 28.867152] BUG: Bad rss-counter state mm:0000000092f7f8ae type:MM_ANONPAGES val:22 [ 29.308997] BUG: Bad rss-counter state mm:000000000d2eaa20 type:MM_FILEPAGES val:33 [ 29.310185] BUG: Bad rss-counter state mm:000000000d2eaa20 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52992' (ECDSA) to the list of known hosts. 2023/06/19 21:27:04 fuzzer started 2023/06/19 21:27:05 dialing manager at localhost:44161 2023/06/19 21:27:05 checking machine... 2023/06/19 21:27:05 checking revisions... [ 29.931845] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:27:05 testing simple program... [ 29.977367] cgroup: Unknown subsys name 'net' [ 30.015030] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:27:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ea82140 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=0000000000000008 RDI=ffff88800ea821a0 RBP=0000000000000000 RSP=ffff88806ce09c48 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000002596 R11=0000000000000000 R12=1ffff1100d9c138b R13=ffff88800ea821a0 R14=ffff88800ea821e0 R15=ffff88800ea82188 RIP=ffffffff8180fd20 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 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=00007f9068e642d0 CR3=000000000eb80000 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=2034303a37323a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a37323a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff860480a8 RCX=ffffffff84497fe6 RDX=0000000000000000 RSI=ffffffff864a870a RDI=ffffffff860480a8 RBP=ffffffff860480ac RSP=ffff888017cef038 R8 =ffffffff864a870a R9 =ffff888017cef130 R10=0000000000038001 R11=00000000000b3b35 R12=ffffffff860480a8 R13=ffffffff860480a8 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcaf RFL=00000256 [---ZAP-] 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 00007f0bf8a2c900 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=00007f0bf89f6008 CR3=0000000019f8a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000