syzkaller login: [ 31.009974] BUG: Bad rss-counter state mm:0000000001753509 type:MM_FILEPAGES val:33 [ 31.010945] BUG: Bad rss-counter state mm:0000000001753509 type:MM_ANONPAGES val:22 [ 31.185298] ================================================================== [ 31.186401] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.187489] Read of size 8 at addr ffff888016ed0c20 by task sshd/219 [ 31.188537] [ 31.188756] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.189622] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.190609] Call Trace: [ 31.190926] <TASK> [ 31.191209] dump_stack_lvl+0x91/0xf0 [ 31.191705] print_report+0xcc/0x620 [ 31.192188] ? __virt_addr_valid+0x102/0x340 [ 31.192736] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.193345] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.193970] kasan_report+0xbe/0xf0 [ 31.194444] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.195065] vma_interval_tree_remove+0xc75/0xec0 [ 31.195678] vma_prepare+0xc54/0x11a0 [ 31.196151] __split_vma+0x5af/0x950 [ 31.196634] ? __pfx___split_vma+0x10/0x10 [ 31.197179] ? find_held_lock+0x2c/0x110 [ 31.197719] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.198285] ? lock_is_held_type+0x9f/0x120 [ 31.198841] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.199451] ? mtree_range_walk+0x632/0x900 [ 31.200015] ? mas_walk+0x5c7/0x7c0 [ 31.200492] do_vmi_munmap+0x1f1/0x2b0 [ 31.200975] mmap_region+0x1f9/0x2660 [ 31.201460] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.201986] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.202709] ? __pfx_lock_acquire+0x10/0x10 [ 31.203245] ? __pfx_mmap_region+0x10/0x10 [ 31.203771] ? security_mmap_addr+0x7d/0xa0 [ 31.204306] ? get_unmapped_area+0x1f5/0x3f0 [ 31.204863] do_mmap+0x854/0xf00 [ 31.205313] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.205828] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.206390] ksys_mmap_pgoff+0x3af/0x500 [ 31.206896] do_syscall_64+0x3f/0x90 [ 31.207371] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.208015] RIP: 0033:0x7f24dcc85d82 [ 31.208480] 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 [ 31.210619] RSP: 002b:00007ffcf5f9e4d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.211529] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f24dcc85d82 [ 31.212367] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f24dc0bf000 [ 31.213212] RBP: 00007f24dc0bf000 R08: 0000000000000009 R09: 0000000000001000 [ 31.214068] R10: 0000000000000812 R11: 0000000000000206 R12: 000056330c559ec0 [ 31.214906] R13: 00007ffcf5f9e4f0 R14: 00007ffcf5f9e520 R15: 00007ffcf5f9e880 [ 31.215757] </TASK> [ 31.216052] [ 31.216268] Allocated by task 212: [ 31.216700] kasan_save_stack+0x22/0x50 [ 31.217204] kasan_set_track+0x25/0x30 [ 31.217708] __kasan_slab_alloc+0x59/0x70 [ 31.218228] kmem_cache_alloc+0x16b/0x370 [ 31.218742] vm_area_dup+0x20/0x160 [ 31.219197] __split_vma+0x170/0x950 [ 31.219662] split_vma+0xc6/0x110 [ 31.220101] mprotect_fixup+0x8d2/0xb30 [ 31.220600] do_mprotect_pkey+0x87e/0xd40 [ 31.221122] __x64_sys_mprotect+0x78/0xc0 [ 31.221656] do_syscall_64+0x3f/0x90 [ 31.222132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.222769] [ 31.222986] Freed by task 19: [ 31.223368] kasan_save_stack+0x22/0x50 [ 31.223871] kasan_set_track+0x25/0x30 [ 31.224360] kasan_save_free_info+0x2b/0x50 [ 31.224884] __kasan_slab_free+0x10a/0x190 [ 31.225411] kmem_cache_free+0x10d/0x4d0 [ 31.225927] rcu_core+0x8c8/0x2860 [ 31.226368] __do_softirq+0x1b7/0x7d4 [ 31.226848] [ 31.227061] Last potentially related work creation: [ 31.227644] kasan_save_stack+0x22/0x50 [ 31.228151] __kasan_record_aux_stack+0x8e/0xa0 [ 31.228741] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.229389] remove_vma+0x139/0x170 [ 31.229869] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.230433] do_vmi_munmap+0x1f1/0x2b0 [ 31.230926] __vm_munmap+0x138/0x3a0 [ 31.231391] __x64_sys_munmap+0x59/0x80 [ 31.231897] do_syscall_64+0x3f/0x90 [ 31.232374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.233021] [ 31.233239] The buggy address belongs to the object at ffff888016ed0bc8 [ 31.233239] which belongs to the cache vm_area_struct of size 168 [ 31.234716] The buggy address is located 88 bytes inside of [ 31.234716] freed 168-byte region [ffff888016ed0bc8, ffff888016ed0c70) [ 31.236142] [ 31.236359] The buggy address belongs to the physical page: [ 31.237015] page:0000000093896dd7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ed0 [ 31.238116] memcg:ffff88800ede2f01 [ 31.238535] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.239174] page_type: 0xffffffff() [ 31.239618] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.240524] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ede2f01 [ 31.241424] page dumped because: kasan: bad access detected [ 31.242093] [ 31.242308] Memory state around the buggy address: [ 31.242887] ffff888016ed0b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.243735] ffff888016ed0b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.244594] >ffff888016ed0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.245448] ^ [ 31.245979] ffff888016ed0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.246830] ffff888016ed0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.247671] ================================================================== [ 31.248887] Disabling lock debugging due to kernel taint [ 33.526623] BUG: Bad rss-counter state mm:0000000082c22505 type:MM_FILEPAGES val:33 [ 33.527670] BUG: Bad rss-counter state mm:0000000082c22505 type:MM_ANONPAGES val:22 [ 34.017921] BUG: Bad rss-counter state mm:000000004d89ae60 type:MM_FILEPAGES val:33 [ 34.018860] BUG: Bad rss-counter state mm:000000004d89ae60 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58380' (ECDSA) to the list of known hosts. 2023/06/21 07:47:05 fuzzer started 2023/06/21 07:47:05 dialing manager at localhost:36067 2023/06/21 07:47:05 checking machine... 2023/06/21 07:47:05 checking revisions... [ 34.788636] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:47:05 testing simple program... [ 34.835131] cgroup: Unknown subsys name 'net' [ 34.896412] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:47:04 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000008 RCX=ffffffff813782c0 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000009 RSP=ffff888008d9fd48 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888008d9fdc8 R14=0000000000000000 R15=ffff88800cfb4080 RIP=ffffffff813782c8 RFL=00000247 [---Z-PC] 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 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=00007f163ac78650 CR3=000000000dd80000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f5fc2a75000 CR3=000000000d60a000 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=af81bf61dbf840a07b4989d5e8643b6d XMM02=ec2efd57dc4c00df000000000011d6e8 XMM03=7c6438349c65555c000000000011d7b8 XMM04=56d715b63371bc1700000000000ae988 XMM05=ad41add1b47782990000000000132e58 XMM06=806171799158d9670000000000131c48 XMM07=fb795ef6d65770560000000000121ef8 XMM08=2c67c8bc2e329bc3000000000011d758 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000