syzkaller login: [ 34.663765] BUG: Bad rss-counter state mm:0000000050788dbd type:MM_FILEPAGES val:33 [ 34.664506] BUG: Bad rss-counter state mm:0000000050788dbd type:MM_ANONPAGES val:22 [ 34.832296] ================================================================== [ 34.833210] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.834127] Read of size 8 at addr ffff888019ecd5c8 by task sshd/221 [ 34.835033] [ 34.835256] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.836111] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.837098] Call Trace: [ 34.837417] [ 34.837705] dump_stack_lvl+0x91/0xf0 [ 34.838190] print_report+0xcc/0x620 [ 34.838678] ? __virt_addr_valid+0x102/0x340 [ 34.839267] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.839879] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.840508] kasan_report+0xbe/0xf0 [ 34.840979] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.841589] vma_interval_tree_remove+0xc75/0xec0 [ 34.842194] vma_prepare+0xc54/0x11a0 [ 34.842676] __split_vma+0x5af/0x950 [ 34.843163] ? __pfx___split_vma+0x10/0x10 [ 34.843685] ? find_held_lock+0x2c/0x110 [ 34.844214] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.844777] ? lock_is_held_type+0x9f/0x120 [ 34.845312] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.845980] ? mtree_range_walk+0x632/0x900 [ 34.846602] ? mas_walk+0x5c7/0x7c0 [ 34.847139] do_vmi_munmap+0x1f1/0x2b0 [ 34.847716] mmap_region+0x1f9/0x2660 [ 34.848239] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.848830] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.849640] ? __pfx_lock_acquire+0x10/0x10 [ 34.850242] ? __pfx_mmap_region+0x10/0x10 [ 34.850877] ? security_mmap_addr+0x7d/0xa0 [ 34.851476] ? get_unmapped_area+0x1f5/0x3f0 [ 34.852113] do_mmap+0x854/0xf00 [ 34.852573] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.853120] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.853772] ksys_mmap_pgoff+0x3af/0x500 [ 34.854345] do_syscall_64+0x3f/0x90 [ 34.854910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.855612] RIP: 0033:0x7f13f8b21d82 [ 34.856140] 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 [ 34.858374] RSP: 002b:00007ffd559b6298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.859268] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f13f8b21d82 [ 34.860077] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f13f7f5b000 [ 34.860883] RBP: 00007f13f7f5b000 R08: 0000000000000009 R09: 0000000000001000 [ 34.861696] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563191b3bb20 [ 34.862512] R13: 00007ffd559b62b0 R14: 00007ffd559b62e0 R15: 00007ffd559b6640 [ 34.863328] [ 34.863602] [ 34.863805] Allocated by task 214: [ 34.864207] kasan_save_stack+0x22/0x50 [ 34.864694] kasan_set_track+0x25/0x30 [ 34.865161] __kasan_slab_alloc+0x59/0x70 [ 34.865665] kmem_cache_alloc+0x16b/0x370 [ 34.866158] vm_area_dup+0x20/0x160 [ 34.866596] __split_vma+0x170/0x950 [ 34.867053] split_vma+0xc6/0x110 [ 34.867476] mprotect_fixup+0x8d2/0xb30 [ 34.867951] do_mprotect_pkey+0x87e/0xd40 [ 34.868445] __x64_sys_mprotect+0x78/0xc0 [ 34.868941] do_syscall_64+0x3f/0x90 [ 34.869392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.870001] [ 34.870213] Freed by task 214: [ 34.870586] kasan_save_stack+0x22/0x50 [ 34.871087] kasan_set_track+0x25/0x30 [ 34.871560] kasan_save_free_info+0x2b/0x50 [ 34.872065] __kasan_slab_free+0x10a/0x190 [ 34.872577] kmem_cache_free+0x10d/0x4d0 [ 34.873061] rcu_core+0x8c8/0x2860 [ 34.873481] __do_softirq+0x1b7/0x7d4 [ 34.873930] [ 34.874133] Last potentially related work creation: [ 34.874686] kasan_save_stack+0x22/0x50 [ 34.875176] __kasan_record_aux_stack+0x8e/0xa0 [ 34.875727] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.876339] remove_vma+0x139/0x170 [ 34.876773] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.877300] do_vmi_munmap+0x1f1/0x2b0 [ 34.877761] __vm_munmap+0x138/0x3a0 [ 34.878201] __x64_sys_munmap+0x59/0x80 [ 34.878672] do_syscall_64+0x3f/0x90 [ 34.879132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.879748] [ 34.879952] The buggy address belongs to the object at ffff888019ecd570 [ 34.879952] which belongs to the cache vm_area_struct of size 168 [ 34.881362] The buggy address is located 88 bytes inside of [ 34.881362] freed 168-byte region [ffff888019ecd570, ffff888019ecd618) [ 34.882799] [ 34.883019] The buggy address belongs to the physical page: [ 34.883686] page:00000000d7b8b250 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ecd [ 34.884786] memcg:ffff88800e0a1501 [ 34.885219] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.885917] page_type: 0xffffffff() [ 34.886371] raw: 0100000000000200 ffff88800879fc80 ffffea000034fa00 dead000000000005 [ 34.887296] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0a1501 [ 34.888206] page dumped because: kasan: bad access detected [ 34.888872] [ 34.889087] Memory state around the buggy address: [ 34.889661] ffff888019ecd480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.890532] ffff888019ecd500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 34.891410] >ffff888019ecd580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.892260] ^ [ 34.892928] ffff888019ecd600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 34.893778] ffff888019ecd680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.894639] ================================================================== [ 34.895696] Disabling lock debugging due to kernel taint [ 36.847784] BUG: Bad rss-counter state mm:00000000ec1aa4d6 type:MM_FILEPAGES val:33 [ 36.848974] BUG: Bad rss-counter state mm:00000000ec1aa4d6 type:MM_ANONPAGES val:22 [ 37.302374] BUG: Bad rss-counter state mm:00000000d972eece type:MM_FILEPAGES val:33 [ 37.303422] BUG: Bad rss-counter state mm:00000000d972eece type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61249' (ECDSA) to the list of known hosts. 2023/06/19 11:48:41 fuzzer started 2023/06/19 11:48:41 dialing manager at localhost:44161 2023/06/19 11:48:41 checking machine... 2023/06/19 11:48:41 checking revisions... [ 37.996688] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:48:41 testing simple program... [ 38.045547] cgroup: Unknown subsys name 'net' [ 38.081153] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:48:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11001dd2e8b RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88800ee97440 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180fd28 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 00007f544ab41900 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=00007fff856d2000 CR3=000000000f718000 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=563412feff00545000000000000080fe 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=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=00007f73cb4f43c0 CR3=000000000db4c000 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=2030343a38343a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a38343a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000