syzkaller login: [ 30.792611] BUG: Bad rss-counter state mm:00000000c4059da9 type:MM_FILEPAGES val:33 [ 30.794040] BUG: Bad rss-counter state mm:00000000c4059da9 type:MM_ANONPAGES val:22 [ 30.945200] ================================================================== [ 30.946095] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.947032] Read of size 8 at addr ffff888015f4a798 by task sshd/218 [ 30.947880] [ 30.948097] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.948971] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.949973] Call Trace: [ 30.950294] [ 30.950575] dump_stack_lvl+0x91/0xf0 [ 30.951065] print_report+0xcc/0x620 [ 30.951547] ? __virt_addr_valid+0x102/0x340 [ 30.952105] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.952751] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.953367] kasan_report+0xbe/0xf0 [ 30.953843] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.954460] vma_interval_tree_remove+0xc75/0xec0 [ 30.955057] vma_prepare+0xc54/0x11a0 [ 30.955540] __split_vma+0x5af/0x950 [ 30.956011] ? __pfx___split_vma+0x10/0x10 [ 30.956542] ? find_held_lock+0x2c/0x110 [ 30.957071] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.957639] ? lock_is_held_type+0x9f/0x120 [ 30.958175] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.958783] ? mtree_range_walk+0x632/0x900 [ 30.959330] ? mas_walk+0x5c7/0x7c0 [ 30.959808] do_vmi_munmap+0x1f1/0x2b0 [ 30.960313] mmap_region+0x1f9/0x2660 [ 30.960797] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.961310] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.962015] ? __pfx_lock_acquire+0x10/0x10 [ 30.962548] ? __pfx_mmap_region+0x10/0x10 [ 30.963071] ? security_mmap_addr+0x7d/0xa0 [ 30.963602] ? get_unmapped_area+0x1f5/0x3f0 [ 30.964189] do_mmap+0x854/0xf00 [ 30.964643] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.965148] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.965721] ksys_mmap_pgoff+0x3af/0x500 [ 30.966253] do_syscall_64+0x3f/0x90 [ 30.966747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.967422] RIP: 0033:0x7f11d32d1d82 [ 30.967896] 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 [ 30.970090] RSP: 002b:00007ffcfd2a5668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.971023] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f11d32d1d82 [ 30.971899] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f11d270b000 [ 30.972782] RBP: 00007f11d270b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.973660] R10: 0000000000000812 R11: 0000000000000206 R12: 000055847a59aec0 [ 30.974543] R13: 00007ffcfd2a5680 R14: 00007ffcfd2a56b0 R15: 00007ffcfd2a5a10 [ 30.975426] [ 30.975730] [ 30.975951] Allocated by task 211: [ 30.976413] kasan_save_stack+0x22/0x50 [ 30.976930] kasan_set_track+0x25/0x30 [ 30.977448] __kasan_slab_alloc+0x59/0x70 [ 30.977991] kmem_cache_alloc+0x16b/0x370 [ 30.978521] vm_area_dup+0x20/0x160 [ 30.978986] __split_vma+0x170/0x950 [ 30.979467] split_vma+0xc6/0x110 [ 30.979915] mprotect_fixup+0x8d2/0xb30 [ 30.980444] do_mprotect_pkey+0x87e/0xd40 [ 30.980975] __x64_sys_mprotect+0x78/0xc0 [ 30.981513] do_syscall_64+0x3f/0x90 [ 30.981994] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.982657] [ 30.982886] Freed by task 211: [ 30.983292] kasan_save_stack+0x22/0x50 [ 30.983803] kasan_set_track+0x25/0x30 [ 30.984334] kasan_save_free_info+0x2b/0x50 [ 30.984887] __kasan_slab_free+0x10a/0x190 [ 30.985434] kmem_cache_free+0x10d/0x4d0 [ 30.985955] rcu_core+0x8c8/0x2860 [ 30.986412] __do_softirq+0x1b7/0x7d4 [ 30.986906] [ 30.987126] Last potentially related work creation: [ 30.987725] kasan_save_stack+0x22/0x50 [ 30.988253] __kasan_record_aux_stack+0x8e/0xa0 [ 30.988842] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.989498] remove_vma+0x139/0x170 [ 30.989960] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.990536] do_vmi_munmap+0x1f1/0x2b0 [ 30.991035] __vm_munmap+0x138/0x3a0 [ 30.991516] __x64_sys_munmap+0x59/0x80 [ 30.992025] do_syscall_64+0x3f/0x90 [ 30.992523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.993184] [ 30.993399] Second to last potentially related work creation: [ 30.994104] kasan_save_stack+0x22/0x50 [ 30.994626] __kasan_record_aux_stack+0x8e/0xa0 [ 30.995220] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.995879] remove_vma+0x139/0x170 [ 30.996367] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.996948] do_vmi_munmap+0x1f1/0x2b0 [ 30.997447] mmap_region+0x1f9/0x2660 [ 30.997941] do_mmap+0x854/0xf00 [ 30.998384] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.998887] ksys_mmap_pgoff+0x3af/0x500 [ 30.999407] do_syscall_64+0x3f/0x90 [ 30.999897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.000575] [ 31.000796] The buggy address belongs to the object at ffff888015f4a740 [ 31.000796] which belongs to the cache vm_area_struct of size 168 [ 31.002316] The buggy address is located 88 bytes inside of [ 31.002316] freed 168-byte region [ffff888015f4a740, ffff888015f4a7e8) [ 31.003765] [ 31.003983] The buggy address belongs to the physical page: [ 31.004678] page:00000000621a4635 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15f4a [ 31.005806] memcg:ffff888018de4801 [ 31.006250] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.006920] page_type: 0xffffffff() [ 31.007386] raw: 0100000000000200 ffff8880087a0c80 ffffea0000637b00 0000000000000008 [ 31.008342] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018de4801 [ 31.009286] page dumped because: kasan: bad access detected [ 31.009956] [ 31.010173] Memory state around the buggy address: [ 31.010756] ffff888015f4a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.011629] ffff888015f4a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.012507] >ffff888015f4a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.013372] ^ [ 31.013873] ffff888015f4a800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.014729] ffff888015f4a880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.015593] ================================================================== [ 31.016665] Disabling lock debugging due to kernel taint [ 32.556257] BUG: Bad rss-counter state mm:00000000fcd32fbc type:MM_FILEPAGES val:33 [ 32.557426] BUG: Bad rss-counter state mm:00000000fcd32fbc type:MM_ANONPAGES val:22 [ 32.995608] BUG: Bad rss-counter state mm:0000000065eaa5a7 type:MM_FILEPAGES val:33 [ 32.996820] BUG: Bad rss-counter state mm:0000000065eaa5a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47029' (ECDSA) to the list of known hosts. 2023/06/21 07:24:54 fuzzer started 2023/06/21 07:24:54 dialing manager at localhost:36067 2023/06/21 07:24:54 checking machine... 2023/06/21 07:24:54 checking revisions... [ 33.562407] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:24:55 testing simple program... [ 33.608463] cgroup: Unknown subsys name 'net' [ 33.678356] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:24:54 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=0000000000000001 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=00007ffcd8d8bdb8 CR3=0000000005482000 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=00007f09c390f51000005637c2b29790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff83682772 RDX=ffff88800cabb680 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff8880095d5a00 RSP=ffff888019c07b40 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=ffffffff83867afd R13=ffff888019522e00 R14=ffff888019c07c30 R15=0000000000000024 RIP=ffffffff8180fea8 RFL=00000256 [---ZAP-] 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 00007f4fcf0db900 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=00007ffdfa3e9000 CR3=000000001672c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000