syzkaller login: [ 31.715453] BUG: Bad rss-counter state mm:00000000a239ff26 type:MM_FILEPAGES val:33 [ 31.716877] BUG: Bad rss-counter state mm:00000000a239ff26 type:MM_ANONPAGES val:22 [ 31.853729] ================================================================== [ 31.854625] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.855571] Read of size 8 at addr ffff88800f960968 by task sshd/220 [ 31.856425] [ 31.856642] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.857511] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.858492] Call Trace: [ 31.858825] [ 31.859122] dump_stack_lvl+0x91/0xf0 [ 31.859610] print_report+0xcc/0x620 [ 31.860089] ? __virt_addr_valid+0x102/0x340 [ 31.860634] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.861242] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.861850] kasan_report+0xbe/0xf0 [ 31.862315] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.862954] vma_interval_tree_remove+0xc75/0xec0 [ 31.863555] vma_prepare+0xc54/0x11a0 [ 31.864041] __split_vma+0x5af/0x950 [ 31.864519] ? __pfx___split_vma+0x10/0x10 [ 31.865052] ? find_held_lock+0x2c/0x110 [ 31.865571] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.866138] ? lock_is_held_type+0x9f/0x120 [ 31.866672] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.867303] ? mtree_range_walk+0x632/0x900 [ 31.867849] ? mas_walk+0x5c7/0x7c0 [ 31.868319] do_vmi_munmap+0x1f1/0x2b0 [ 31.868821] mmap_region+0x1f9/0x2660 [ 31.869297] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.869854] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.870581] ? __pfx_lock_acquire+0x10/0x10 [ 31.871126] ? __pfx_mmap_region+0x10/0x10 [ 31.871659] ? security_mmap_addr+0x7d/0xa0 [ 31.872191] ? get_unmapped_area+0x1f5/0x3f0 [ 31.872737] do_mmap+0x854/0xf00 [ 31.873173] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.873680] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.874246] ksys_mmap_pgoff+0x3af/0x500 [ 31.874752] do_syscall_64+0x3f/0x90 [ 31.875258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.875916] RIP: 0033:0x7f9dc26d8d82 [ 31.876373] 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 [ 31.878529] RSP: 002b:00007ffd440d75a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.879463] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9dc26d8d82 [ 31.880307] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9dc1b12000 [ 31.881170] RBP: 00007f9dc1b12000 R08: 0000000000000009 R09: 0000000000001000 [ 31.882029] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fadbdaaf70 [ 31.882898] R13: 00007ffd440d75c0 R14: 00007ffd440d75f0 R15: 00007ffd440d7950 [ 31.883767] [ 31.884056] [ 31.884269] Allocated by task 213: [ 31.884706] kasan_save_stack+0x22/0x50 [ 31.885208] kasan_set_track+0x25/0x30 [ 31.885702] __kasan_slab_alloc+0x59/0x70 [ 31.886228] kmem_cache_alloc+0x16b/0x370 [ 31.886747] vm_area_dup+0x20/0x160 [ 31.887220] __split_vma+0x170/0x950 [ 31.887689] split_vma+0xc6/0x110 [ 31.888135] mprotect_fixup+0x8d2/0xb30 [ 31.888640] do_mprotect_pkey+0x87e/0xd40 [ 31.889168] __x64_sys_mprotect+0x78/0xc0 [ 31.889696] do_syscall_64+0x3f/0x90 [ 31.890171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.890821] [ 31.891039] Freed by task 210: [ 31.891427] kasan_save_stack+0x22/0x50 [ 31.891939] kasan_set_track+0x25/0x30 [ 31.892433] kasan_save_free_info+0x2b/0x50 [ 31.892967] __kasan_slab_free+0x10a/0x190 [ 31.893507] kmem_cache_free+0x10d/0x4d0 [ 31.894018] rcu_core+0x8c8/0x2860 [ 31.894470] __do_softirq+0x1b7/0x7d4 [ 31.894960] [ 31.895178] Last potentially related work creation: [ 31.895771] kasan_save_stack+0x22/0x50 [ 31.896278] __kasan_record_aux_stack+0x8e/0xa0 [ 31.896856] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.897498] remove_vma+0x139/0x170 [ 31.897948] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.898514] do_vmi_munmap+0x1f1/0x2b0 [ 31.899022] __vm_munmap+0x138/0x3a0 [ 31.899492] __x64_sys_munmap+0x59/0x80 [ 31.899993] do_syscall_64+0x3f/0x90 [ 31.900467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.901108] [ 31.901324] The buggy address belongs to the object at ffff88800f960910 [ 31.901324] which belongs to the cache vm_area_struct of size 168 [ 31.902811] The buggy address is located 88 bytes inside of [ 31.902811] freed 168-byte region [ffff88800f960910, ffff88800f9609b8) [ 31.904224] [ 31.904444] The buggy address belongs to the physical page: [ 31.905112] page:00000000471902ec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf960 [ 31.906197] memcg:ffff888014719301 [ 31.906629] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.907309] page_type: 0xffffffff() [ 31.907763] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.908696] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014719301 [ 31.909606] page dumped because: kasan: bad access detected [ 31.910276] [ 31.910496] Memory state around the buggy address: [ 31.911093] ffff88800f960800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.911951] ffff88800f960880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.912816] >ffff88800f960900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.913665] ^ [ 31.914445] ffff88800f960980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.915313] ffff88800f960a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.916176] ================================================================== [ 31.917278] Disabling lock debugging due to kernel taint [ 33.740654] BUG: Bad rss-counter state mm:00000000ef77c107 type:MM_FILEPAGES val:33 [ 33.741825] BUG: Bad rss-counter state mm:00000000ef77c107 type:MM_ANONPAGES val:22 [ 34.154434] BUG: Bad rss-counter state mm:00000000d16f96f4 type:MM_FILEPAGES val:33 [ 34.156460] BUG: Bad rss-counter state mm:00000000d16f96f4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33023' (ECDSA) to the list of known hosts. 2023/06/19 14:08:50 fuzzer started 2023/06/19 14:08:51 dialing manager at localhost:44161 2023/06/19 14:08:51 checking machine... 2023/06/19 14:08:51 checking revisions... [ 34.905367] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:08:51 testing simple program... [ 34.962818] cgroup: Unknown subsys name 'net' [ 35.004873] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:08:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8617de5e RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff8617de62 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000002c9c3 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff8880165afac8 R15=ffff88806ce09a98 RIP=ffffffff81131151 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 00007f12e4eef700 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=00007fea82789570 CR3=00000000169fa000 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=2030353a38303a3431203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a38303a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801bebfb98 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88801bebfb88 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e47 RFL=00000286 [--S--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 00007f5ed7404900 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=00007fffed8df000 CR3=000000000c7d6000 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