syzkaller login: [ 30.792863] BUG: Bad rss-counter state mm:00000000206d3f03 type:MM_FILEPAGES val:33 [ 30.794073] BUG: Bad rss-counter state mm:00000000206d3f03 type:MM_ANONPAGES val:22 [ 30.831402] ================================================================== [ 30.832367] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.833453] Read of size 8 at addr ffff888016a3ded8 by task sshd/221 [ 30.834234] [ 30.834458] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.835346] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.836347] Call Trace: [ 30.836669] [ 30.836955] dump_stack_lvl+0x91/0xf0 [ 30.837453] print_report+0xcc/0x620 [ 30.837940] ? __virt_addr_valid+0x102/0x340 [ 30.838496] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.839116] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.839739] kasan_report+0xbe/0xf0 [ 30.840223] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.840850] vma_interval_tree_remove+0xc75/0xec0 [ 30.841454] vma_prepare+0xc54/0x11a0 [ 30.841941] __split_vma+0x5af/0x950 [ 30.842414] ? __pfx___split_vma+0x10/0x10 [ 30.842948] ? find_held_lock+0x2c/0x110 [ 30.843474] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.844045] ? lock_is_held_type+0x9f/0x120 [ 30.844606] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.845222] ? mtree_range_walk+0x632/0x900 [ 30.845776] ? mas_walk+0x5c7/0x7c0 [ 30.846253] do_vmi_munmap+0x1f1/0x2b0 [ 30.846751] mmap_region+0x1f9/0x2660 [ 30.847239] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.847758] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.848495] ? __pfx_lock_acquire+0x10/0x10 [ 30.849037] ? __pfx_mmap_region+0x10/0x10 [ 30.849572] ? security_mmap_addr+0x7d/0xa0 [ 30.850111] ? get_unmapped_area+0x1f5/0x3f0 [ 30.850668] do_mmap+0x854/0xf00 [ 30.851112] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.851613] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.852202] ksys_mmap_pgoff+0x3af/0x500 [ 30.852717] do_syscall_64+0x3f/0x90 [ 30.853206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.853858] RIP: 0033:0x7f847b0bed82 [ 30.854318] 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 [ 30.856468] RSP: 002b:00007ffe6845ba98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.857382] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f847b0bed82 [ 30.858239] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f847a4f8000 [ 30.859092] RBP: 00007f847a4f8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.860072] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556bee96af70 [ 30.861034] R13: 00007ffe6845bab0 R14: 00007ffe6845bae0 R15: 00007ffe6845be40 [ 30.862003] [ 30.862301] [ 30.862521] Allocated by task 214: [ 30.862951] kasan_save_stack+0x22/0x50 [ 30.863467] kasan_set_track+0x25/0x30 [ 30.863968] __kasan_slab_alloc+0x59/0x70 [ 30.864521] kmem_cache_alloc+0x16b/0x370 [ 30.865046] vm_area_dup+0x20/0x160 [ 30.865508] __split_vma+0x170/0x950 [ 30.865977] split_vma+0xc6/0x110 [ 30.866423] mprotect_fixup+0x8d2/0xb30 [ 30.866932] do_mprotect_pkey+0x87e/0xd40 [ 30.867461] __x64_sys_mprotect+0x78/0xc0 [ 30.867989] do_syscall_64+0x3f/0x90 [ 30.868495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.869142] [ 30.869358] Freed by task 214: [ 30.869754] kasan_save_stack+0x22/0x50 [ 30.870260] kasan_set_track+0x25/0x30 [ 30.870757] kasan_save_free_info+0x2b/0x50 [ 30.871306] __kasan_slab_free+0x10a/0x190 [ 30.871844] kmem_cache_free+0x10d/0x4d0 [ 30.872367] rcu_core+0x8c8/0x2860 [ 30.872817] __do_softirq+0x1b7/0x7d4 [ 30.873302] [ 30.873521] Last potentially related work creation: [ 30.874110] kasan_save_stack+0x22/0x50 [ 30.874620] __kasan_record_aux_stack+0x8e/0xa0 [ 30.875199] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.875847] remove_vma+0x139/0x170 [ 30.876312] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.876873] do_vmi_munmap+0x1f1/0x2b0 [ 30.877367] __vm_munmap+0x138/0x3a0 [ 30.877836] __x64_sys_munmap+0x59/0x80 [ 30.878348] do_syscall_64+0x3f/0x90 [ 30.878821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.879466] [ 30.879685] The buggy address belongs to the object at ffff888016a3de80 [ 30.879685] which belongs to the cache vm_area_struct of size 168 [ 30.881187] The buggy address is located 88 bytes inside of [ 30.881187] freed 168-byte region [ffff888016a3de80, ffff888016a3df28) [ 30.882609] [ 30.882830] The buggy address belongs to the physical page: [ 30.883497] page:000000001d548e7f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a3d [ 30.884620] memcg:ffff88800ccb8c01 [ 30.885052] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.885708] page_type: 0xffffffff() [ 30.886163] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.887105] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ccb8c01 [ 30.888027] page dumped because: kasan: bad access detected [ 30.888703] [ 30.888926] Memory state around the buggy address: [ 30.889535] ffff888016a3dd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.890407] ffff888016a3de00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.891278] >ffff888016a3de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.892134] ^ [ 30.892884] ffff888016a3df00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.893749] ffff888016a3df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.894607] ================================================================== [ 30.895682] Disabling lock debugging due to kernel taint [ 32.894533] BUG: Bad rss-counter state mm:00000000adabe955 type:MM_FILEPAGES val:33 [ 32.895733] BUG: Bad rss-counter state mm:00000000adabe955 type:MM_ANONPAGES val:22 [ 33.263181] BUG: Bad rss-counter state mm:0000000039dcb21e type:MM_FILEPAGES val:33 [ 33.264389] BUG: Bad rss-counter state mm:0000000039dcb21e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39726' (ECDSA) to the list of known hosts. 2023/06/19 18:55:02 fuzzer started 2023/06/19 18:55:03 dialing manager at localhost:44161 2023/06/19 18:55:03 checking machine... 2023/06/19 18:55:03 checking revisions... [ 33.981040] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:55:03 testing simple program... [ 34.030652] cgroup: Unknown subsys name 'net' [ 34.072072] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:55:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880167d0000 RSI=ffffffff81b2b6b5 RDI=ffff88800ff9c600 RBP=ffff888019a93438 RSP=ffff88801a0ef848 R8 =0000000000000005 R9 =000000000000009b R10=00000000000000a0 R11=00000000000b6996 R12=ffff8880180b4b00 R13=ffff88800ff9c000 R14=ffff88800ff9e000 R15=ffff888019a931c4 RIP=ffffffff81b2b6b9 RFL=00000293 [--S-A-C] 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 00007f98edef8700 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=00007f4f035bb500 CR3=000000000e328000 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=2032303a35353a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a35353a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a70 RCX=0000000000000001 RDX=1ffff1100d9e134f RSI=ffff888010337e78 RDI=ffff88806cf09a78 RBP=ffff888010337e78 RSP=ffff88806cf099c8 R8 =ffffffff863b1970 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000008a8e5 R12=0000000000000008 R13=ffff88806cf09ab8 R14=ffff888010337e80 R15=ffff88806cf09a70 RIP=ffffffff81130445 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 00007f04a407b900 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=00007ffc3cdacff8 CR3=000000001453a000 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=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