syzkaller login: [ 30.130990] BUG: Bad rss-counter state mm:00000000224468c9 type:MM_FILEPAGES val:33 [ 30.132551] BUG: Bad rss-counter state mm:00000000224468c9 type:MM_ANONPAGES val:22 [ 30.265042] ================================================================== [ 30.265971] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.266928] Read of size 8 at addr ffff88801a94c880 by task sshd/220 [ 30.267768] [ 30.268003] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.268876] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.269841] Call Trace: [ 30.270182] [ 30.270473] dump_stack_lvl+0x91/0xf0 [ 30.270974] print_report+0xcc/0x620 [ 30.271459] ? __virt_addr_valid+0x102/0x340 [ 30.272011] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.272634] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.273249] kasan_report+0xbe/0xf0 [ 30.273742] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.274361] vma_interval_tree_remove+0xc75/0xec0 [ 30.274973] vma_prepare+0xc54/0x11a0 [ 30.275451] __split_vma+0x5af/0x950 [ 30.275921] ? __pfx___split_vma+0x10/0x10 [ 30.276444] ? find_held_lock+0x2c/0x110 [ 30.276965] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.277529] ? lock_is_held_type+0x9f/0x120 [ 30.278061] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.278662] ? mtree_range_walk+0x632/0x900 [ 30.279234] ? mas_walk+0x5c7/0x7c0 [ 30.279718] do_vmi_munmap+0x1f1/0x2b0 [ 30.280212] mmap_region+0x1f9/0x2660 [ 30.280694] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.281205] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.281915] ? __pfx_lock_acquire+0x10/0x10 [ 30.282448] ? __pfx_mmap_region+0x10/0x10 [ 30.282982] ? security_mmap_addr+0x7d/0xa0 [ 30.283515] ? get_unmapped_area+0x1f5/0x3f0 [ 30.284064] do_mmap+0x854/0xf00 [ 30.284499] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.284987] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.285545] ksys_mmap_pgoff+0x3af/0x500 [ 30.286047] do_syscall_64+0x3f/0x90 [ 30.286525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.287188] RIP: 0033:0x7fa8233ccd82 [ 30.287645] 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 [ 30.289760] RSP: 002b:00007ffe327e7bf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.290656] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa8233ccd82 [ 30.291532] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa822806000 [ 30.292376] RBP: 00007fa822806000 R08: 0000000000000009 R09: 0000000000001000 [ 30.293214] R10: 0000000000000812 R11: 0000000000000206 R12: 00005575ee55cb20 [ 30.294057] R13: 00007ffe327e7c10 R14: 00007ffe327e7c40 R15: 00007ffe327e7fa0 [ 30.294913] [ 30.295204] [ 30.295416] Allocated by task 213: [ 30.295845] kasan_save_stack+0x22/0x50 [ 30.296344] kasan_set_track+0x25/0x30 [ 30.296830] __kasan_slab_alloc+0x59/0x70 [ 30.297378] kmem_cache_alloc+0x16b/0x370 [ 30.297924] vm_area_dup+0x20/0x160 [ 30.298398] __split_vma+0x170/0x950 [ 30.298922] split_vma+0xc6/0x110 [ 30.299380] mprotect_fixup+0x8d2/0xb30 [ 30.299897] do_mprotect_pkey+0x87e/0xd40 [ 30.300432] __x64_sys_mprotect+0x78/0xc0 [ 30.300959] do_syscall_64+0x3f/0x90 [ 30.301442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.302104] [ 30.302326] Freed by task 213: [ 30.302745] kasan_save_stack+0x22/0x50 [ 30.303260] kasan_set_track+0x25/0x30 [ 30.303781] kasan_save_free_info+0x2b/0x50 [ 30.304316] __kasan_slab_free+0x10a/0x190 [ 30.304857] kmem_cache_free+0x10d/0x4d0 [ 30.305383] rcu_core+0x8c8/0x2860 [ 30.305845] __do_softirq+0x1b7/0x7d4 [ 30.306328] [ 30.306544] Last potentially related work creation: [ 30.307145] kasan_save_stack+0x22/0x50 [ 30.307661] __kasan_record_aux_stack+0x8e/0xa0 [ 30.308236] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.308882] remove_vma+0x139/0x170 [ 30.309340] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.309923] do_vmi_munmap+0x1f1/0x2b0 [ 30.310432] __vm_munmap+0x138/0x3a0 [ 30.310945] __x64_sys_munmap+0x59/0x80 [ 30.311444] do_syscall_64+0x3f/0x90 [ 30.311924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.312559] [ 30.312776] The buggy address belongs to the object at ffff88801a94c828 [ 30.312776] which belongs to the cache vm_area_struct of size 168 [ 30.314249] The buggy address is located 88 bytes inside of [ 30.314249] freed 168-byte region [ffff88801a94c828, ffff88801a94c8d0) [ 30.315661] [ 30.315876] The buggy address belongs to the physical page: [ 30.316536] page:0000000095c6e17c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a94c [ 30.317629] memcg:ffff888015dca101 [ 30.318062] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.318719] page_type: 0xffffffff() [ 30.319174] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.320143] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015dca101 [ 30.321096] page dumped because: kasan: bad access detected [ 30.321782] [ 30.322004] Memory state around the buggy address: [ 30.322579] ffff88801a94c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.323472] ffff88801a94c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.324346] >ffff88801a94c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.325238] ^ [ 30.325670] ffff88801a94c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.326558] ffff88801a94c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.327436] ================================================================== [ 30.328413] Disabling lock debugging due to kernel taint [ 32.427057] BUG: Bad rss-counter state mm:0000000012f14b11 type:MM_FILEPAGES val:33 [ 32.428017] BUG: Bad rss-counter state mm:0000000012f14b11 type:MM_ANONPAGES val:22 [ 32.899019] BUG: Bad rss-counter state mm:00000000342034f1 type:MM_FILEPAGES val:33 [ 32.900069] BUG: Bad rss-counter state mm:00000000342034f1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49140' (ECDSA) to the list of known hosts. 2023/06/20 16:44:06 fuzzer started 2023/06/20 16:44:06 dialing manager at localhost:36067 2023/06/20 16:44:06 checking machine... 2023/06/20 16:44:06 checking revisions... [ 33.609955] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:44:06 testing simple program... [ 33.663660] cgroup: Unknown subsys name 'net' [ 33.708867] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:44:06 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800c408000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff8164faf3 RDI=ffff88801023d5b4 RBP=0000000000000001 RSP=ffff88800da2fb60 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff888016154808 R15=0000000000000001 RIP=ffffffff814c0864 RFL=00000293 [--S-A-C] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f99c452e900 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=00007f99c3973590 CR3=000000000c814000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=68bdff3b8cafde4000000000000ae988 XMM05=e9ace4a59db9795b0000000000132b20 XMM06=c291bd5c70af25b90000000000131910 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007f29beb070b0 CR3=0000000009e98000 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=2035303a34343a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a34343a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000