syzkaller login: [ 30.777641] BUG: Bad rss-counter state mm:000000002f1dc0a6 type:MM_FILEPAGES val:33 [ 30.778676] BUG: Bad rss-counter state mm:000000002f1dc0a6 type:MM_ANONPAGES val:22 [ 30.936743] ================================================================== [ 30.937656] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.938598] Read of size 8 at addr ffff88800e7c6df0 by task sshd/220 [ 30.939367] [ 30.939583] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.940554] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.941535] Call Trace: [ 30.941854] [ 30.942141] dump_stack_lvl+0x91/0xf0 [ 30.942653] print_report+0xcc/0x620 [ 30.943139] ? __virt_addr_valid+0x102/0x340 [ 30.943695] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.944315] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.944936] kasan_report+0xbe/0xf0 [ 30.945414] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.946030] vma_interval_tree_remove+0xc75/0xec0 [ 30.946641] vma_prepare+0xc54/0x11a0 [ 30.947116] __split_vma+0x5af/0x950 [ 30.947591] ? __pfx___split_vma+0x10/0x10 [ 30.948125] ? find_held_lock+0x2c/0x110 [ 30.948644] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.949207] ? lock_is_held_type+0x9f/0x120 [ 30.949745] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.950352] ? mtree_range_walk+0x632/0x900 [ 30.950922] ? mas_walk+0x5c7/0x7c0 [ 30.951392] do_vmi_munmap+0x1f1/0x2b0 [ 30.951881] mmap_region+0x1f9/0x2660 [ 30.952363] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.952874] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.953584] ? __pfx_lock_acquire+0x10/0x10 [ 30.954120] ? __pfx_mmap_region+0x10/0x10 [ 30.954683] ? security_mmap_addr+0x7d/0xa0 [ 30.955211] ? get_unmapped_area+0x1f5/0x3f0 [ 30.955783] do_mmap+0x854/0xf00 [ 30.956222] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.956722] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.957288] ksys_mmap_pgoff+0x3af/0x500 [ 30.957796] do_syscall_64+0x3f/0x90 [ 30.958278] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.958936] RIP: 0033:0x7f455814fd82 [ 30.959394] 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 [ 30.961507] RSP: 002b:00007fffd05652a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.962404] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f455814fd82 [ 30.963260] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4557589000 [ 30.964107] RBP: 00007f4557589000 R08: 0000000000000009 R09: 0000000000001000 [ 30.964962] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dcbe0baec0 [ 30.965801] R13: 00007fffd05652c0 R14: 00007fffd05652f0 R15: 00007fffd0565650 [ 30.966659] [ 30.966950] [ 30.967167] Allocated by task 213: [ 30.967609] kasan_save_stack+0x22/0x50 [ 30.968124] kasan_set_track+0x25/0x30 [ 30.968624] __kasan_slab_alloc+0x59/0x70 [ 30.969151] kmem_cache_alloc+0x16b/0x370 [ 30.969678] vm_area_dup+0x20/0x160 [ 30.970126] __split_vma+0x170/0x950 [ 30.970607] split_vma+0xc6/0x110 [ 30.971048] mprotect_fixup+0x8d2/0xb30 [ 30.971548] do_mprotect_pkey+0x87e/0xd40 [ 30.972072] __x64_sys_mprotect+0x78/0xc0 [ 30.972594] do_syscall_64+0x3f/0x90 [ 30.973075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.973718] [ 30.973934] Freed by task 203: [ 30.974323] kasan_save_stack+0x22/0x50 [ 30.974847] kasan_set_track+0x25/0x30 [ 30.975335] kasan_save_free_info+0x2b/0x50 [ 30.975864] __kasan_slab_free+0x10a/0x190 [ 30.976396] kmem_cache_free+0x10d/0x4d0 [ 30.976898] rcu_core+0x8c8/0x2860 [ 30.977349] __do_softirq+0x1b7/0x7d4 [ 30.977823] [ 30.978038] Last potentially related work creation: [ 30.978622] kasan_save_stack+0x22/0x50 [ 30.979122] __kasan_record_aux_stack+0x8e/0xa0 [ 30.979693] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.980339] remove_vma+0x139/0x170 [ 30.980786] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.981341] do_vmi_munmap+0x1f1/0x2b0 [ 30.981822] __vm_munmap+0x138/0x3a0 [ 30.982287] __x64_sys_munmap+0x59/0x80 [ 30.982793] do_syscall_64+0x3f/0x90 [ 30.983268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.983915] [ 30.984134] The buggy address belongs to the object at ffff88800e7c6d98 [ 30.984134] which belongs to the cache vm_area_struct of size 168 [ 30.985587] The buggy address is located 88 bytes inside of [ 30.985587] freed 168-byte region [ffff88800e7c6d98, ffff88800e7c6e40) [ 30.986990] [ 30.987205] The buggy address belongs to the physical page: [ 30.987858] page:00000000b75e2625 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7c6 [ 30.988935] memcg:ffff88800f6a5901 [ 30.989360] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.990057] page_type: 0xffffffff() [ 30.990513] raw: 0100000000000200 ffff8880087a0c80 ffffea0000386840 dead000000000005 [ 30.991423] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6a5901 [ 30.992329] page dumped because: kasan: bad access detected [ 30.993007] [ 30.993229] Memory state around the buggy address: [ 30.993805] ffff88800e7c6c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.994655] ffff88800e7c6d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.995498] >ffff88800e7c6d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.996347] ^ [ 30.997146] ffff88800e7c6e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.997993] ffff88800e7c6e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.998853] ================================================================== [ 30.999888] Disabling lock debugging due to kernel taint [ 32.622941] BUG: Bad rss-counter state mm:000000003ba58f21 type:MM_FILEPAGES val:33 [ 32.623701] BUG: Bad rss-counter state mm:000000003ba58f21 type:MM_ANONPAGES val:22 [ 33.097637] BUG: Bad rss-counter state mm:000000008e420285 type:MM_FILEPAGES val:33 [ 33.098783] BUG: Bad rss-counter state mm:000000008e420285 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42600' (ECDSA) to the list of known hosts. 2023/06/20 16:03:47 fuzzer started 2023/06/20 16:03:47 dialing manager at localhost:36067 2023/06/20 16:03:47 checking machine... 2023/06/20 16:03:47 checking revisions... [ 33.789397] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:03:47 testing simple program... [ 33.842659] cgroup: Unknown subsys name 'net' [ 33.894836] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:03:47 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fbdc53e76a0 CR3=000000000f736000 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=00000000000000000000000000000000 XMM01=e87d7ed3f744779f944f10032cd00aee XMM02=ec2efd57dc4c00df000000000011b0a0 XMM03=05943e76aa7e6dbd000000000011b170 XMM04=f43375ef23a0900500000000000ae988 XMM05=d5070b904e15eecf0000000000133658 XMM06=19e9129bd510f2350000000000132510 XMM07=fb795ef6d65770560000000000122688 XMM08=2c67c8bc2e329bc3000000000011b110 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c0abfa RBX=ffffffff86055fd4 RCX=ffffffff84601449 RDX=0000000000000000 RSI=ffffffff864bcdf6 RDI=ffffffff86055fb8 RBP=ffffffff86055fb8 RSP=ffff88806cf099e0 R8 =ffffffff864bcdf6 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6d7d R12=ffffffff86055ff4 R13=ffffffff86055fb8 R14=ffffffff86055fb8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007fd4b1062900 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=00007fd4b161a0b0 CR3=0000000016ca8000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000