syzkaller login: [ 34.102671] BUG: Bad rss-counter state mm:0000000045fd3461 type:MM_FILEPAGES val:33 [ 34.103987] BUG: Bad rss-counter state mm:0000000045fd3461 type:MM_ANONPAGES val:22 [ 34.148690] ================================================================== [ 34.149714] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.150752] Read of size 8 at addr ffff88800f09ed08 by task sshd/220 [ 34.151610] [ 34.151846] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.152794] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.153849] Call Trace: [ 34.154194] [ 34.154502] dump_stack_lvl+0x91/0xf0 [ 34.155027] print_report+0xcc/0x620 [ 34.155576] ? __virt_addr_valid+0x102/0x340 [ 34.156177] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.156854] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.157517] kasan_report+0xbe/0xf0 [ 34.158043] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.158740] vma_interval_tree_remove+0xc75/0xec0 [ 34.159423] vma_prepare+0xc54/0x11a0 [ 34.159962] __split_vma+0x5af/0x950 [ 34.160500] ? __pfx___split_vma+0x10/0x10 [ 34.161098] ? find_held_lock+0x2c/0x110 [ 34.161688] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.162322] ? lock_is_held_type+0x9f/0x120 [ 34.162921] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.163620] ? mtree_range_walk+0x632/0x900 [ 34.164227] ? mas_walk+0x5c7/0x7c0 [ 34.164759] do_vmi_munmap+0x1f1/0x2b0 [ 34.165304] mmap_region+0x1f9/0x2660 [ 34.165841] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.166411] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.167215] ? __pfx_lock_acquire+0x10/0x10 [ 34.167805] ? __pfx_mmap_region+0x10/0x10 [ 34.168393] ? security_mmap_addr+0x7d/0xa0 [ 34.168962] ? get_unmapped_area+0x1f5/0x3f0 [ 34.169549] do_mmap+0x854/0xf00 [ 34.170023] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.170561] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.171188] ksys_mmap_pgoff+0x3af/0x500 [ 34.171740] do_syscall_64+0x3f/0x90 [ 34.172258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.172958] RIP: 0033:0x7f165a6d8d82 [ 34.173456] 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 [ 34.175749] RSP: 002b:00007ffc93e74108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.176716] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f165a6d8d82 [ 34.177628] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1659b12000 [ 34.178531] RBP: 00007f1659b12000 R08: 0000000000000009 R09: 0000000000001000 [ 34.179449] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e4853eec0 [ 34.180360] R13: 00007ffc93e74120 R14: 00007ffc93e74150 R15: 00007ffc93e744b0 [ 34.181269] [ 34.181587] [ 34.181816] Allocated by task 213: [ 34.182275] kasan_save_stack+0x22/0x50 [ 34.182825] kasan_set_track+0x25/0x30 [ 34.183354] __kasan_slab_alloc+0x59/0x70 [ 34.183912] kmem_cache_alloc+0x16b/0x370 [ 34.184463] vm_area_dup+0x20/0x160 [ 34.184941] __split_vma+0x170/0x950 [ 34.185440] split_vma+0xc6/0x110 [ 34.185906] mprotect_fixup+0x8d2/0xb30 [ 34.186446] do_mprotect_pkey+0x87e/0xd40 [ 34.186998] __x64_sys_mprotect+0x78/0xc0 [ 34.187563] do_syscall_64+0x3f/0x90 [ 34.188065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.188750] [ 34.188982] Freed by task 213: [ 34.189400] kasan_save_stack+0x22/0x50 [ 34.189935] kasan_set_track+0x25/0x30 [ 34.190459] kasan_save_free_info+0x2b/0x50 [ 34.191022] __kasan_slab_free+0x10a/0x190 [ 34.191613] kmem_cache_free+0x10d/0x4d0 [ 34.192153] rcu_core+0x8c8/0x2860 [ 34.192632] __do_softirq+0x1b7/0x7d4 [ 34.193138] [ 34.193366] Last potentially related work creation: [ 34.193984] kasan_save_stack+0x22/0x50 [ 34.194529] __kasan_record_aux_stack+0x8e/0xa0 [ 34.195149] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.195835] remove_vma+0x139/0x170 [ 34.196317] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.196908] do_vmi_munmap+0x1f1/0x2b0 [ 34.197424] __vm_munmap+0x138/0x3a0 [ 34.197918] __x64_sys_munmap+0x59/0x80 [ 34.198448] do_syscall_64+0x3f/0x90 [ 34.198957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.199650] [ 34.199877] The buggy address belongs to the object at ffff88800f09ecb0 [ 34.199877] which belongs to the cache vm_area_struct of size 168 [ 34.201443] The buggy address is located 88 bytes inside of [ 34.201443] freed 168-byte region [ffff88800f09ecb0, ffff88800f09ed58) [ 34.202912] [ 34.203158] The buggy address belongs to the physical page: [ 34.203854] page:000000007baf6452 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf09e [ 34.204992] memcg:ffff88800c63dc01 [ 34.205445] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.206123] page_type: 0xffffffff() [ 34.206601] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.207564] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c63dc01 [ 34.208509] page dumped because: kasan: bad access detected [ 34.209200] [ 34.209432] Memory state around the buggy address: [ 34.210040] ffff88800f09ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 34.210938] ffff88800f09ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.211846] >ffff88800f09ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.212747] ^ [ 34.213205] ffff88800f09ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.214103] ffff88800f09ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.214990] ================================================================== [ 34.216348] Disabling lock debugging due to kernel taint [ 36.335626] BUG: Bad rss-counter state mm:000000006c7babd2 type:MM_FILEPAGES val:33 [ 36.336332] BUG: Bad rss-counter state mm:000000006c7babd2 type:MM_ANONPAGES val:22 [ 36.758844] BUG: Bad rss-counter state mm:000000000e6a3e21 type:MM_FILEPAGES val:33 [ 36.760038] BUG: Bad rss-counter state mm:000000000e6a3e21 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52936' (ECDSA) to the list of known hosts. 2023/06/20 00:39:06 fuzzer started 2023/06/20 00:39:06 dialing manager at localhost:44161 2023/06/20 00:39:06 checking machine... 2023/06/20 00:39:06 checking revisions... [ 37.461882] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:39:06 testing simple program... [ 37.501668] cgroup: Unknown subsys name 'net' [ 37.556442] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:39:02 Registers: info registers vcpu 0 RAX=0000000000000246 RBX=0000000000000201 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000201 RDI=ffffffff81f7a42c RBP=ffffffff81f7a42c RSP=ffff88800d9cfd48 R8 =0000000000000000 R9 =ffffed1001c9a213 R10=ffff88800e4d109b R11=0000000000000000 R12=ffff88800d9cfe30 R13=000000000000006e R14=ffff88800e4d1000 R15=ffff8880183df300 RIP=ffffffff8118db73 RFL=00000046 [---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 00007fa4e6210900 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=00007fa4e67c5650 CR3=000000000fdd4000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007f909d438158 CR3=000000000c5f2000 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=0a32386df5a1fbb5274a090d04f12c69 XMM02=000000000011d348ec2efd57dc4c00df XMM03=00000000001240f0cc7d4f4f53b789d1 XMM04=08746be91692aacc00000000000ae988 XMM05=19e9129bd510f2350000000000133c70 XMM06=9e1d3c70b9ece1310000000000132ad8 XMM07=e042d86d42eb936e0000000000124370 XMM08=cc7d4f4f53b789d1000000000011d3a8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000