syzkaller login: [ 32.686774] BUG: Bad rss-counter state mm:00000000c1413c51 type:MM_FILEPAGES val:33 [ 32.688319] BUG: Bad rss-counter state mm:00000000c1413c51 type:MM_ANONPAGES val:22 [ 32.843991] ================================================================== [ 32.845048] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.846152] Read of size 8 at addr ffff88800c60aa50 by task sshd/220 [ 32.847075] [ 32.847292] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.848142] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.849125] Call Trace: [ 32.849445] [ 32.849726] dump_stack_lvl+0x91/0xf0 [ 32.850212] print_report+0xcc/0x620 [ 32.850693] ? __virt_addr_valid+0x102/0x340 [ 32.851241] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.851848] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.852452] kasan_report+0xbe/0xf0 [ 32.852923] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.853547] vma_interval_tree_remove+0xc75/0xec0 [ 32.854141] vma_prepare+0xc54/0x11a0 [ 32.854611] __split_vma+0x5af/0x950 [ 32.855079] ? __pfx___split_vma+0x10/0x10 [ 32.855599] ? find_held_lock+0x2c/0x110 [ 32.856116] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.856679] ? lock_is_held_type+0x9f/0x120 [ 32.857229] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.857831] ? mtree_range_walk+0x632/0x900 [ 32.858375] ? mas_walk+0x5c7/0x7c0 [ 32.858842] do_vmi_munmap+0x1f1/0x2b0 [ 32.859324] mmap_region+0x1f9/0x2660 [ 32.859802] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.860306] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.861010] ? __pfx_lock_acquire+0x10/0x10 [ 32.861546] ? __pfx_mmap_region+0x10/0x10 [ 32.862073] ? security_mmap_addr+0x7d/0xa0 [ 32.862596] ? get_unmapped_area+0x1f5/0x3f0 [ 32.863144] do_mmap+0x854/0xf00 [ 32.863580] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.864069] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.864628] ksys_mmap_pgoff+0x3af/0x500 [ 32.865138] do_syscall_64+0x3f/0x90 [ 32.865618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.866257] RIP: 0033:0x7f343974dd82 [ 32.866710] 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 [ 32.868817] RSP: 002b:00007ffef9128588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.869730] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f343974dd82 [ 32.870568] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3438b87000 [ 32.871402] RBP: 00007f3438b87000 R08: 0000000000000009 R09: 0000000000001000 [ 32.872243] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d0ab393ec0 [ 32.873097] R13: 00007ffef91285a0 R14: 00007ffef91285d0 R15: 00007ffef9128930 [ 32.873957] [ 32.874249] [ 32.874460] Allocated by task 213: [ 32.874885] kasan_save_stack+0x22/0x50 [ 32.875384] kasan_set_track+0x25/0x30 [ 32.875875] __kasan_slab_alloc+0x59/0x70 [ 32.876399] kmem_cache_alloc+0x16b/0x370 [ 32.876907] vm_area_dup+0x20/0x160 [ 32.877382] __split_vma+0x170/0x950 [ 32.877841] split_vma+0xc6/0x110 [ 32.878273] mprotect_fixup+0x8d2/0xb30 [ 32.878773] do_mprotect_pkey+0x87e/0xd40 [ 32.879294] __x64_sys_mprotect+0x78/0xc0 [ 32.879805] do_syscall_64+0x3f/0x90 [ 32.880273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.880903] [ 32.881121] Freed by task 213: [ 32.881508] kasan_save_stack+0x22/0x50 [ 32.882009] kasan_set_track+0x25/0x30 [ 32.882492] kasan_save_free_info+0x2b/0x50 [ 32.883014] __kasan_slab_free+0x10a/0x190 [ 32.883541] kmem_cache_free+0x10d/0x4d0 [ 32.884038] rcu_core+0x8c8/0x2860 [ 32.884481] __do_softirq+0x1b7/0x7d4 [ 32.884951] [ 32.885185] Last potentially related work creation: [ 32.885763] kasan_save_stack+0x22/0x50 [ 32.886265] __kasan_record_aux_stack+0x8e/0xa0 [ 32.886833] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.887468] remove_vma+0x139/0x170 [ 32.887919] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.888469] do_vmi_munmap+0x1f1/0x2b0 [ 32.888949] __vm_munmap+0x138/0x3a0 [ 32.889424] __x64_sys_munmap+0x59/0x80 [ 32.889917] do_syscall_64+0x3f/0x90 [ 32.890381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.891015] [ 32.891231] The buggy address belongs to the object at ffff88800c60a9f8 [ 32.891231] which belongs to the cache vm_area_struct of size 168 [ 32.892675] The buggy address is located 88 bytes inside of [ 32.892675] freed 168-byte region [ffff88800c60a9f8, ffff88800c60aaa0) [ 32.894085] [ 32.894298] The buggy address belongs to the physical page: [ 32.894954] page:00000000ecad34e1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc60a [ 32.896026] memcg:ffff88801bc75501 [ 32.896444] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.897090] page_type: 0xffffffff() [ 32.897538] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.898448] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc75501 [ 32.899347] page dumped because: kasan: bad access detected [ 32.899998] [ 32.900211] Memory state around the buggy address: [ 32.900783] ffff88800c60a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.901638] ffff88800c60a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.902492] >ffff88800c60aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.903332] ^ [ 32.904021] ffff88800c60aa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.904867] ffff88800c60ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.905737] ================================================================== [ 32.906694] Disabling lock debugging due to kernel taint [ 34.796878] BUG: Bad rss-counter state mm:00000000cfebb741 type:MM_FILEPAGES val:33 [ 34.797881] BUG: Bad rss-counter state mm:00000000cfebb741 type:MM_ANONPAGES val:22 [ 35.318462] BUG: Bad rss-counter state mm:00000000ce60fdc7 type:MM_FILEPAGES val:33 [ 35.319617] BUG: Bad rss-counter state mm:00000000ce60fdc7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16095' (ECDSA) to the list of known hosts. 2023/06/20 00:59:43 fuzzer started 2023/06/20 00:59:43 dialing manager at localhost:44161 2023/06/20 00:59:43 checking machine... 2023/06/20 00:59:43 checking revisions... [ 36.019336] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:59:43 testing simple program... [ 36.075880] cgroup: Unknown subsys name 'net' [ 36.137317] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:59:40 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff88801021fee8 RDI=ffffffff818e8f1a RBP=ffff88806ce09af0 RSP=ffff88806ce09a80 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000022144 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800f079b40 R15=ffff88800d59ec60 RIP=ffffffff81130399 RFL=00000202 [-------] 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 00007f5016845900 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=00007ffde1d35000 CR3=0000000019d9c000 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=ffff888008c58400 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=00007f5f50d9d100 CR3=000000000dc50000 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=2032343a39353a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a39353a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000