syzkaller login: [ 42.781833] BUG: Bad rss-counter state mm:000000008bb0e359 type:MM_FILEPAGES val:33 [ 42.783235] BUG: Bad rss-counter state mm:000000008bb0e359 type:MM_ANONPAGES val:22 [ 42.918956] ================================================================== [ 42.919856] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.920816] Read of size 8 at addr ffff888018b076b0 by task sshd/219 [ 42.921573] [ 42.921795] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.922739] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.923734] Call Trace: [ 42.924056] [ 42.924352] dump_stack_lvl+0x91/0xf0 [ 42.924853] print_report+0xcc/0x620 [ 42.925334] ? __virt_addr_valid+0x102/0x340 [ 42.925894] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.926524] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.927146] kasan_report+0xbe/0xf0 [ 42.927628] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.928287] vma_interval_tree_remove+0xc75/0xec0 [ 42.928907] vma_prepare+0xc54/0x11a0 [ 42.929395] __split_vma+0x5af/0x950 [ 42.929862] ? __pfx___split_vma+0x10/0x10 [ 42.930384] ? find_held_lock+0x2c/0x110 [ 42.930898] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.931456] ? lock_is_held_type+0x9f/0x120 [ 42.931992] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.932608] ? mtree_range_walk+0x632/0x900 [ 42.933159] ? mas_walk+0x5c7/0x7c0 [ 42.933631] do_vmi_munmap+0x1f1/0x2b0 [ 42.934120] mmap_region+0x1f9/0x2660 [ 42.934602] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.935120] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.935838] ? __pfx_lock_acquire+0x10/0x10 [ 42.936376] ? __pfx_mmap_region+0x10/0x10 [ 42.936907] ? security_mmap_addr+0x7d/0xa0 [ 42.937434] ? get_unmapped_area+0x1f5/0x3f0 [ 42.937982] do_mmap+0x854/0xf00 [ 42.938418] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.938911] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.939468] ksys_mmap_pgoff+0x3af/0x500 [ 42.939976] do_syscall_64+0x3f/0x90 [ 42.940473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.941114] RIP: 0033:0x7f88a5351d82 [ 42.941571] 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 [ 42.943670] RSP: 002b:00007fffd75d90e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.944583] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88a5351d82 [ 42.945425] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88a478b000 [ 42.946293] RBP: 00007f88a478b000 R08: 0000000000000009 R09: 0000000000001000 [ 42.947138] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558f64ac0b20 [ 42.948001] R13: 00007fffd75d9100 R14: 00007fffd75d9130 R15: 00007fffd75d9490 [ 42.948873] [ 42.949165] [ 42.949378] Allocated by task 212: [ 42.949809] kasan_save_stack+0x22/0x50 [ 42.950312] kasan_set_track+0x25/0x30 [ 42.950815] __kasan_slab_alloc+0x59/0x70 [ 42.951337] kmem_cache_alloc+0x16b/0x370 [ 42.951861] vm_area_dup+0x20/0x160 [ 42.952324] __split_vma+0x170/0x950 [ 42.952788] split_vma+0xc6/0x110 [ 42.953222] mprotect_fixup+0x8d2/0xb30 [ 42.953719] do_mprotect_pkey+0x87e/0xd40 [ 42.954241] __x64_sys_mprotect+0x78/0xc0 [ 42.954764] do_syscall_64+0x3f/0x90 [ 42.955238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.955887] [ 42.956108] Freed by task 203: [ 42.956508] kasan_save_stack+0x22/0x50 [ 42.957017] kasan_set_track+0x25/0x30 [ 42.957532] kasan_save_free_info+0x2b/0x50 [ 42.958073] __kasan_slab_free+0x10a/0x190 [ 42.958601] kmem_cache_free+0x10d/0x4d0 [ 42.959106] rcu_core+0x8c8/0x2860 [ 42.959549] __do_softirq+0x1b7/0x7d4 [ 42.960019] [ 42.960242] Last potentially related work creation: [ 42.960846] kasan_save_stack+0x22/0x50 [ 42.961354] __kasan_record_aux_stack+0x8e/0xa0 [ 42.961926] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.962576] remove_vma+0x139/0x170 [ 42.963026] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.963578] do_vmi_munmap+0x1f1/0x2b0 [ 42.964066] __vm_munmap+0x138/0x3a0 [ 42.964549] __x64_sys_munmap+0x59/0x80 [ 42.965040] do_syscall_64+0x3f/0x90 [ 42.965518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.966154] [ 42.966367] Second to last potentially related work creation: [ 42.967062] kasan_save_stack+0x22/0x50 [ 42.967565] __kasan_record_aux_stack+0x8e/0xa0 [ 42.968144] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.968799] remove_vma+0x139/0x170 [ 42.969255] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.969815] do_vmi_munmap+0x1f1/0x2b0 [ 42.970300] mmap_region+0x1f9/0x2660 [ 42.970773] do_mmap+0x854/0xf00 [ 42.971205] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.971697] ksys_mmap_pgoff+0x3af/0x500 [ 42.972199] do_syscall_64+0x3f/0x90 [ 42.972689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.973330] [ 42.973549] The buggy address belongs to the object at ffff888018b07658 [ 42.973549] which belongs to the cache vm_area_struct of size 168 [ 42.975007] The buggy address is located 88 bytes inside of [ 42.975007] freed 168-byte region [ffff888018b07658, ffff888018b07700) [ 42.976456] [ 42.976682] The buggy address belongs to the physical page: [ 42.977351] page:000000004eccb469 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18b07 [ 42.978444] memcg:ffff888018a94301 [ 42.978864] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.979519] page_type: 0xffffffff() [ 42.979970] raw: 0100000000000200 ffff88800879fc80 ffffea00003f1840 dead000000000004 [ 42.980916] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018a94301 [ 42.981843] page dumped because: kasan: bad access detected [ 42.982516] [ 42.982737] Memory state around the buggy address: [ 42.983318] ffff888018b07580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.984174] ffff888018b07600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 42.985042] >ffff888018b07680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.985897] ^ [ 42.986478] ffff888018b07700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 42.987347] ffff888018b07780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 42.988209] ================================================================== [ 42.989271] Disabling lock debugging due to kernel taint [ 44.954043] BUG: Bad rss-counter state mm:00000000c7d96ad6 type:MM_FILEPAGES val:33 [ 44.955125] BUG: Bad rss-counter state mm:00000000c7d96ad6 type:MM_ANONPAGES val:22 [ 45.424976] BUG: Bad rss-counter state mm:000000006cf1643c type:MM_FILEPAGES val:33 [ 45.426090] BUG: Bad rss-counter state mm:000000006cf1643c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49642' (ECDSA) to the list of known hosts. 2023/06/19 21:24:55 fuzzer started 2023/06/19 21:24:55 dialing manager at localhost:44161 2023/06/19 21:24:55 checking machine... 2023/06/19 21:24:55 checking revisions... [ 46.209227] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:24:55 testing simple program... [ 46.239285] cgroup: Unknown subsys name 'net' [ 46.274236] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:24:51 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=000000000000001a RCX=ffffffff811f8916 RDX=ffff8880147b8000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffffffff854f6380 RSP=ffff8880147b7870 R8 =0000000000000005 R9 =0000000000000000 R10=000000000000001a R11=0000000000000001 R12=ffff88800e9d63c0 R13=0000000000000000 R14=ffff8880147b7b80 R15=ffff8880147b8000 RIP=ffffffff814c01e1 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 00007f99693bf900 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=00007f7112869650 CR3=00000000095c2000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=d79b4de6d14c590300000000000ae988 XMM05=24e327c2b8da68530000000000136598 XMM06=19e9129bd510f23500000000001350c0 XMM07=fb795ef6d65770560000000000124548 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800e3dd000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11001c7ba9f RSI=ffffffff8386afa8 RDI=0000000000000005 RBP=ffff88800ff37c48 RSP=ffff88800ff37b28 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000000 R12=ffff88800e3dd4f8 R13=00000000000000e5 R14=ffff888008c78000 R15=0000000000000002 RIP=ffffffff8386afe6 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 00007f71122b4900 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=00007f711286b618 CR3=00000000097e2000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000