syzkaller login: [ 28.754988] BUG: Bad rss-counter state mm:0000000028f8ebb0 type:MM_FILEPAGES val:33 [ 28.757119] BUG: Bad rss-counter state mm:0000000028f8ebb0 type:MM_ANONPAGES val:22 [ 28.920803] ================================================================== [ 28.921711] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.922638] Read of size 8 at addr ffff88801a1b8140 by task sshd/219 [ 28.923396] [ 28.923700] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.924544] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.925507] Call Trace: [ 28.925990] [ 28.926333] dump_stack_lvl+0x91/0xf0 [ 28.926949] print_report+0xcc/0x620 [ 28.927520] ? __virt_addr_valid+0x102/0x340 [ 28.928267] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.929048] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.929783] kasan_report+0xbe/0xf0 [ 28.930383] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.931180] vma_interval_tree_remove+0xc75/0xec0 [ 28.931939] vma_prepare+0xc54/0x11a0 [ 28.932529] __split_vma+0x5af/0x950 [ 28.933144] ? __pfx___split_vma+0x10/0x10 [ 28.933797] ? find_held_lock+0x2c/0x110 [ 28.934458] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.935196] ? lock_is_held_type+0x9f/0x120 [ 28.935880] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.936629] ? mtree_range_walk+0x632/0x900 [ 28.937303] ? mas_walk+0x5c7/0x7c0 [ 28.937789] do_vmi_munmap+0x1f1/0x2b0 [ 28.938295] mmap_region+0x1f9/0x2660 [ 28.938777] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.939318] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.940042] ? __pfx_lock_acquire+0x10/0x10 [ 28.940570] ? __pfx_mmap_region+0x10/0x10 [ 28.941124] ? security_mmap_addr+0x7d/0xa0 [ 28.941771] ? get_unmapped_area+0x1f5/0x3f0 [ 28.942464] do_mmap+0x854/0xf00 [ 28.943033] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.943644] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.944359] ksys_mmap_pgoff+0x3af/0x500 [ 28.944912] do_syscall_64+0x3f/0x90 [ 28.945399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.946078] RIP: 0033:0x7f393387dd82 [ 28.946546] 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 [ 28.948703] RSP: 002b:00007ffe8ff289e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.949646] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f393387dd82 [ 28.950514] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3932cb7000 [ 28.951399] RBP: 00007f3932cb7000 R08: 0000000000000009 R09: 0000000000001000 [ 28.952261] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559dc15e7b20 [ 28.953125] R13: 00007ffe8ff28a00 R14: 00007ffe8ff28a30 R15: 00007ffe8ff28d90 [ 28.954029] [ 28.954325] [ 28.954540] Allocated by task 212: [ 28.955000] kasan_save_stack+0x22/0x50 [ 28.955509] kasan_set_track+0x25/0x30 [ 28.956028] __kasan_slab_alloc+0x59/0x70 [ 28.956557] kmem_cache_alloc+0x16b/0x370 [ 28.957122] vm_area_dup+0x20/0x160 [ 28.957588] __split_vma+0x170/0x950 [ 28.958065] split_vma+0xc6/0x110 [ 28.958512] mprotect_fixup+0x8d2/0xb30 [ 28.959045] do_mprotect_pkey+0x87e/0xd40 [ 28.959571] __x64_sys_mprotect+0x78/0xc0 [ 28.960109] do_syscall_64+0x3f/0x90 [ 28.960589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.961274] [ 28.961489] Freed by task 212: [ 28.961892] kasan_save_stack+0x22/0x50 [ 28.962400] kasan_set_track+0x25/0x30 [ 28.962928] kasan_save_free_info+0x2b/0x50 [ 28.963467] __kasan_slab_free+0x10a/0x190 [ 28.964033] kmem_cache_free+0x10d/0x4d0 [ 28.964543] rcu_core+0x8c8/0x2860 [ 28.965018] __do_softirq+0x1b7/0x7d4 [ 28.965501] [ 28.965717] Last potentially related work creation: [ 28.966317] kasan_save_stack+0x22/0x50 [ 28.966837] __kasan_record_aux_stack+0x8e/0xa0 [ 28.967426] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.968088] remove_vma+0x139/0x170 [ 28.968541] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.969145] do_vmi_munmap+0x1f1/0x2b0 [ 28.969640] __vm_munmap+0x138/0x3a0 [ 28.970127] __x64_sys_munmap+0x59/0x80 [ 28.970634] do_syscall_64+0x3f/0x90 [ 28.971146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.971800] [ 28.972026] The buggy address belongs to the object at ffff88801a1b80e8 [ 28.972026] which belongs to the cache vm_area_struct of size 168 [ 28.973518] The buggy address is located 88 bytes inside of [ 28.973518] freed 168-byte region [ffff88801a1b80e8, ffff88801a1b8190) [ 28.974955] [ 28.975174] The buggy address belongs to the physical page: [ 28.975840] page:00000000b589d461 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1b8 [ 28.976973] memcg:ffff8880166c5d01 [ 28.977406] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.978069] page_type: 0xffffffff() [ 28.978524] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.979466] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880166c5d01 [ 28.980387] page dumped because: kasan: bad access detected [ 28.981076] [ 28.981299] Memory state around the buggy address: [ 28.981910] ffff88801a1b8000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.982794] ffff88801a1b8080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 28.983700] >ffff88801a1b8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.984598] ^ [ 28.985299] ffff88801a1b8180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 28.986197] ffff88801a1b8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 28.987100] ================================================================== [ 28.988103] Disabling lock debugging due to kernel taint [ 31.014568] BUG: Bad rss-counter state mm:000000004114b318 type:MM_FILEPAGES val:33 [ 31.015743] BUG: Bad rss-counter state mm:000000004114b318 type:MM_ANONPAGES val:22 [ 31.418331] BUG: Bad rss-counter state mm:000000001413a987 type:MM_FILEPAGES val:33 [ 31.419860] BUG: Bad rss-counter state mm:000000001413a987 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30907' (ECDSA) to the list of known hosts. 2023/06/21 05:23:34 fuzzer started 2023/06/21 05:23:34 dialing manager at localhost:36067 2023/06/21 05:23:34 checking machine... 2023/06/21 05:23:34 checking revisions... [ 32.144591] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:23:34 testing simple program... [ 32.196430] cgroup: Unknown subsys name 'net' [ 32.240655] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:23:33 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f18e8cecff0 CR3=000000001a19a000 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=2033333a33323a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a33323a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000e77e7ea4 RBX=00000000ec17777a RCX=00000000e2bca924 RDX=000000000000000f RSI=0000000000000003 RDI=00000000e2bca924 RBP=ffff8880084c6140 RSP=ffff888018357120 R8 =00000000ef2ded70 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000002800 R14=ffff888018357188 R15=000000000000000f RIP=ffffffff82270545 RFL=00000282 [--S----] 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 00007efe50385900 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=00007efe50364020 CR3=000000000fc94000 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=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