syzkaller login: [ 38.753306] BUG: Bad rss-counter state mm:0000000074bb161b type:MM_FILEPAGES val:33 [ 38.754581] BUG: Bad rss-counter state mm:0000000074bb161b type:MM_ANONPAGES val:22 [ 38.944037] ================================================================== [ 38.944688] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.945394] Read of size 8 at addr ffff88800e7fb4e0 by task sshd/220 [ 38.946236] [ 38.946393] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.946991] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.947661] Call Trace: [ 38.947886] [ 38.948091] dump_stack_lvl+0x91/0xf0 [ 38.948443] print_report+0xcc/0x620 [ 38.948819] ? __virt_addr_valid+0x102/0x340 [ 38.949227] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.953731] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.954181] kasan_report+0xbe/0xf0 [ 38.954527] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.954999] vma_interval_tree_remove+0xc75/0xec0 [ 38.955429] vma_prepare+0xc54/0x11a0 [ 38.955775] __split_vma+0x5af/0x950 [ 38.956114] ? __pfx___split_vma+0x10/0x10 [ 38.956490] ? find_held_lock+0x2c/0x110 [ 38.956911] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.957301] ? lock_is_held_type+0x9f/0x120 [ 38.957752] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.958242] ? mtree_range_walk+0x632/0x900 [ 38.958638] ? mas_walk+0x5c7/0x7c0 [ 38.958980] do_vmi_munmap+0x1f1/0x2b0 [ 38.959332] mmap_region+0x1f9/0x2660 [ 38.959679] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.960099] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.960616] ? __pfx_lock_acquire+0x10/0x10 [ 38.961005] ? __pfx_mmap_region+0x10/0x10 [ 38.961392] ? security_mmap_addr+0x7d/0xa0 [ 38.962055] ? get_unmapped_area+0x1f5/0x3f0 [ 38.962448] do_mmap+0x854/0xf00 [ 38.962769] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.963135] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.963535] ksys_mmap_pgoff+0x3af/0x500 [ 38.963903] do_syscall_64+0x3f/0x90 [ 38.964252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.964713] RIP: 0033:0x7f0a7539ed82 [ 38.965083] 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 [ 38.966686] RSP: 002b:00007ffc8353b6c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.967387] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0a7539ed82 [ 38.968043] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0a747d8000 [ 38.968661] RBP: 00007f0a747d8000 R08: 0000000000000009 R09: 0000000000001000 [ 38.969266] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c9e9c9f70 [ 38.973960] R13: 00007ffc8353b6e0 R14: 00007ffc8353b710 R15: 00007ffc8353ba70 [ 38.974613] [ 38.974829] [ 38.975113] Allocated by task 213: [ 38.975416] kasan_save_stack+0x22/0x50 [ 38.975779] kasan_set_track+0x25/0x30 [ 38.976126] __kasan_slab_alloc+0x59/0x70 [ 38.976492] kmem_cache_alloc+0x16b/0x370 [ 38.976855] vm_area_dup+0x20/0x160 [ 38.977171] __split_vma+0x170/0x950 [ 38.977521] split_vma+0xc6/0x110 [ 38.977812] mprotect_fixup+0x8d2/0xb30 [ 38.978155] do_mprotect_pkey+0x87e/0xd40 [ 38.978512] __x64_sys_mprotect+0x78/0xc0 [ 38.978896] do_syscall_64+0x3f/0x90 [ 38.979223] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.979657] [ 38.979827] Freed by task 13: [ 38.980095] kasan_save_stack+0x22/0x50 [ 38.980434] kasan_set_track+0x25/0x30 [ 38.980772] kasan_save_free_info+0x2b/0x50 [ 38.981129] __kasan_slab_free+0x10a/0x190 [ 38.981505] kmem_cache_free+0x10d/0x4d0 [ 38.981841] rcu_core+0x8c8/0x2860 [ 38.982138] __do_softirq+0x1b7/0x7d4 [ 38.982456] [ 38.982613] Last potentially related work creation: [ 38.982998] kasan_save_stack+0x22/0x50 [ 38.983329] __kasan_record_aux_stack+0x8e/0xa0 [ 38.983705] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.984139] remove_vma+0x139/0x170 [ 38.984433] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.984814] do_vmi_munmap+0x1f1/0x2b0 [ 38.985139] __vm_munmap+0x138/0x3a0 [ 38.985468] __x64_sys_munmap+0x59/0x80 [ 38.985808] do_syscall_64+0x3f/0x90 [ 38.986125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.986549] [ 38.986710] Second to last potentially related work creation: [ 38.987205] kasan_save_stack+0x22/0x50 [ 38.987536] __kasan_record_aux_stack+0x8e/0xa0 [ 38.987915] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.988336] remove_vma+0x139/0x170 [ 38.988633] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.989004] do_vmi_munmap+0x1f1/0x2b0 [ 38.989331] mmap_region+0x1f9/0x2660 [ 38.989715] do_mmap+0x854/0xf00 [ 38.990007] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.990332] ksys_mmap_pgoff+0x3af/0x500 [ 38.990682] do_syscall_64+0x3f/0x90 [ 38.991011] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.991437] [ 38.991587] The buggy address belongs to the object at ffff88800e7fb488 [ 38.991587] which belongs to the cache vm_area_struct of size 168 [ 38.992557] The buggy address is located 88 bytes inside of [ 38.992557] freed 168-byte region [ffff88800e7fb488, ffff88800e7fb530) [ 38.993510] [ 38.993662] The buggy address belongs to the physical page: [ 38.994096] page:0000000023fb6271 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7fb [ 38.994838] memcg:ffff88800e3d1f01 [ 38.995138] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.995596] page_type: 0xffffffff() [ 38.995899] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.996506] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3d1f01 [ 38.997102] page dumped because: kasan: bad access detected [ 38.997568] [ 38.997715] Memory state around the buggy address: [ 38.998109] ffff88800e7fb380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.998698] ffff88800e7fb400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.999294] >ffff88800e7fb480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.999854] ^ [ 39.000353] ffff88800e7fb500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 39.000921] ffff88800e7fb580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.001499] ================================================================== [ 39.002219] Disabling lock debugging due to kernel taint [ 41.934895] BUG: Bad rss-counter state mm:0000000067bfcbed type:MM_FILEPAGES val:33 [ 41.935626] BUG: Bad rss-counter state mm:0000000067bfcbed type:MM_ANONPAGES val:22 [ 42.622365] BUG: Bad rss-counter state mm:000000001a298933 type:MM_FILEPAGES val:33 [ 42.623868] BUG: Bad rss-counter state mm:000000001a298933 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3012' (ECDSA) to the list of known hosts. 2023/06/21 08:16:13 fuzzer started 2023/06/21 08:16:13 dialing manager at localhost:36067 2023/06/21 08:16:13 checking machine... 2023/06/21 08:16:13 checking revisions... [ 43.481862] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:16:13 testing simple program... [ 43.544107] cgroup: Unknown subsys name 'net' [ 43.619264] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:16:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f581f460000 RCX=0000000000000000 RDX=0000000000000000 RSI=000000000000063f RDI=ffffffff848ea100 RBP=0000000000000004 RSP=ffff88800fec7928 R8 =0000000000000006 R9 =00007f581f460000 R10=00007f581f460000 R11=0000000000000000 R12=ffff888009a52b10 R13=0000000000000000 R14=00007f581f460000 R15=dffffc0000000000 RIP=ffffffff8122e4ca RFL=00000246 [---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 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=00007f581f79c328 CR3=0000000017740000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=fffffbfff0adb095 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff88800d6ff6b0 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=00000000800f000d R12=0000000000000003 R13=fffffbfff0adb094 R14=0000000000000001 R15=1ffff11001adfed7 RIP=ffffffff8453685d 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 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=00007f72a9b0f790 CR3=000000001366c000 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=0000000000000002fffffffe7ffbfeff XMM01=00000000000000008000000000000006 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000