syzkaller login: [ 30.638791] BUG: Bad rss-counter state mm:000000009fb88193 type:MM_FILEPAGES val:33 [ 30.640741] BUG: Bad rss-counter state mm:000000009fb88193 type:MM_ANONPAGES val:22 [ 30.823517] ================================================================== [ 30.824497] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.825707] Read of size 8 at addr ffff888016998d08 by task sshd/220 [ 30.826603] [ 30.826839] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.827776] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.828852] Call Trace: [ 30.829194] [ 30.829536] dump_stack_lvl+0x91/0xf0 [ 30.830068] print_report+0xcc/0x620 [ 30.830588] ? __virt_addr_valid+0x102/0x340 [ 30.831177] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.831837] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.832499] kasan_report+0xbe/0xf0 [ 30.833018] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.833716] vma_interval_tree_remove+0xc75/0xec0 [ 30.834380] vma_prepare+0xc54/0x11a0 [ 30.834899] __split_vma+0x5af/0x950 [ 30.835413] ? __pfx___split_vma+0x10/0x10 [ 30.836008] ? find_held_lock+0x2c/0x110 [ 30.836574] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.837189] ? lock_is_held_type+0x9f/0x120 [ 30.837827] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.838498] ? mtree_range_walk+0x632/0x900 [ 30.839102] ? mas_walk+0x5c7/0x7c0 [ 30.839621] do_vmi_munmap+0x1f1/0x2b0 [ 30.840154] mmap_region+0x1f9/0x2660 [ 30.840675] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.841234] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.842034] ? __pfx_lock_acquire+0x10/0x10 [ 30.842610] ? __pfx_mmap_region+0x10/0x10 [ 30.843179] ? security_mmap_addr+0x7d/0xa0 [ 30.843754] ? get_unmapped_area+0x1f5/0x3f0 [ 30.844349] do_mmap+0x854/0xf00 [ 30.844824] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.845379] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.846006] ksys_mmap_pgoff+0x3af/0x500 [ 30.846556] do_syscall_64+0x3f/0x90 [ 30.847074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.847781] RIP: 0033:0x7fce65817d82 [ 30.848273] 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 [ 30.850621] RSP: 002b:00007ffe88e31058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.851592] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fce65817d82 [ 30.852507] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fce64c51000 [ 30.853459] RBP: 00007fce64c51000 R08: 0000000000000009 R09: 0000000000001000 [ 30.854372] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a4a925cec0 [ 30.855285] R13: 00007ffe88e31070 R14: 00007ffe88e310a0 R15: 00007ffe88e31400 [ 30.856203] [ 30.856514] [ 30.856745] Allocated by task 213: [ 30.857204] kasan_save_stack+0x22/0x50 [ 30.857784] kasan_set_track+0x25/0x30 [ 30.858312] __kasan_slab_alloc+0x59/0x70 [ 30.858876] kmem_cache_alloc+0x16b/0x370 [ 30.859432] vm_area_dup+0x20/0x160 [ 30.859922] __split_vma+0x170/0x950 [ 30.860421] split_vma+0xc6/0x110 [ 30.860890] mprotect_fixup+0x8d2/0xb30 [ 30.861461] do_mprotect_pkey+0x87e/0xd40 [ 30.862016] __x64_sys_mprotect+0x78/0xc0 [ 30.862567] do_syscall_64+0x3f/0x90 [ 30.863075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.863762] [ 30.863998] Freed by task 213: [ 30.864418] kasan_save_stack+0x22/0x50 [ 30.864955] kasan_set_track+0x25/0x30 [ 30.865523] kasan_save_free_info+0x2b/0x50 [ 30.866097] __kasan_slab_free+0x10a/0x190 [ 30.866670] kmem_cache_free+0x10d/0x4d0 [ 30.867214] rcu_core+0x8c8/0x2860 [ 30.867697] __do_softirq+0x1b7/0x7d4 [ 30.868210] [ 30.868442] Last potentially related work creation: [ 30.869068] kasan_save_stack+0x22/0x50 [ 30.869644] __kasan_record_aux_stack+0x8e/0xa0 [ 30.870270] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.870966] remove_vma+0x139/0x170 [ 30.871450] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.872052] do_vmi_munmap+0x1f1/0x2b0 [ 30.872573] __vm_munmap+0x138/0x3a0 [ 30.873076] __x64_sys_munmap+0x59/0x80 [ 30.873638] do_syscall_64+0x3f/0x90 [ 30.874155] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.874852] [ 30.875089] The buggy address belongs to the object at ffff888016998cb0 [ 30.875089] which belongs to the cache vm_area_struct of size 168 [ 30.876652] The buggy address is located 88 bytes inside of [ 30.876652] freed 168-byte region [ffff888016998cb0, ffff888016998d58) [ 30.878204] [ 30.878437] The buggy address belongs to the physical page: [ 30.879140] page:00000000643d3b9c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16998 [ 30.880305] memcg:ffff88800e45cd01 [ 30.880761] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.881476] page_type: 0xffffffff() [ 30.881952] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.882929] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e45cd01 [ 30.883913] page dumped because: kasan: bad access detected [ 30.884621] [ 30.884851] Memory state around the buggy address: [ 30.885511] ffff888016998c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.886424] ffff888016998c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.887340] >ffff888016998d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.888251] ^ [ 30.888721] ffff888016998d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.889667] ffff888016998e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.890579] ================================================================== [ 30.891746] Disabling lock debugging due to kernel taint [ 33.048723] BUG: Bad rss-counter state mm:000000003c751401 type:MM_FILEPAGES val:33 [ 33.049857] BUG: Bad rss-counter state mm:000000003c751401 type:MM_ANONPAGES val:22 [ 33.543189] BUG: Bad rss-counter state mm:00000000453c2184 type:MM_FILEPAGES val:33 [ 33.544182] BUG: Bad rss-counter state mm:00000000453c2184 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2264' (ECDSA) to the list of known hosts. 2023/06/20 22:12:33 fuzzer started 2023/06/20 22:12:33 dialing manager at localhost:36067 2023/06/20 22:12:33 checking machine... 2023/06/20 22:12:33 checking revisions... [ 34.282037] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:12:33 testing simple program... [ 34.331110] cgroup: Unknown subsys name 'net' [ 34.389565] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:12:33 Registers: info registers vcpu 0 RAX=ffffffff85408001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffffffff85407e01 RSI=ffffffff85407d68 RDI=ffff88806ce09aa8 RBP=ffff88806ce09af0 RSP=ffff88806ce09a10 R8 =ffffffff864bce30 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88806ce09af8 R13=ffffffff85400000 R14=ffffffff85407d68 R15=ffff88806ce09a98 RIP=ffffffff811304d1 RFL=00000282 [--S----] 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=00007f9e64bd5220 CR3=000000000edfe000 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=2033333a32313a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a32313a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800fc10e00 RCX=0000000000000000 RDX=000000000010000e RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88800f0472f0 RSP=ffff88800f047240 R8 =000000008010000e R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff88800fc10e00 R12=ffffea00003f0400 R13=ffffea00005a2e80 R14=ffff8880084c6140 R15=ffff888016ee8a00 RIP=ffffffff8180697a RFL=00000082 [--S----] 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 00007f589eaa9900 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=00007f589ea88020 CR3=000000000d9ee000 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