syzkaller login: [ 31.201131] BUG: Bad rss-counter state mm:00000000ef45106a type:MM_FILEPAGES val:33 [ 31.202215] BUG: Bad rss-counter state mm:00000000ef45106a type:MM_ANONPAGES val:22 [ 31.365686] ================================================================== [ 31.366828] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.368100] Read of size 8 at addr ffff888009083880 by task sshd/221 [ 31.369073] [ 31.369333] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.370422] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.371640] Call Trace: [ 31.372033] [ 31.372381] dump_stack_lvl+0x91/0xf0 [ 31.372988] print_report+0xcc/0x620 [ 31.373578] ? __virt_addr_valid+0x102/0x340 [ 31.374245] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.375008] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.375743] kasan_report+0xbe/0xf0 [ 31.376307] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.377066] vma_interval_tree_remove+0xc75/0xec0 [ 31.377802] vma_prepare+0xc54/0x11a0 [ 31.378385] __split_vma+0x5af/0x950 [ 31.378949] ? __pfx___split_vma+0x10/0x10 [ 31.379592] ? find_held_lock+0x2c/0x110 [ 31.380218] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.380919] ? lock_is_held_type+0x9f/0x120 [ 31.381576] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.382310] ? mtree_range_walk+0x632/0x900 [ 31.382980] ? mas_walk+0x5c7/0x7c0 [ 31.383552] do_vmi_munmap+0x1f1/0x2b0 [ 31.384146] mmap_region+0x1f9/0x2660 [ 31.384737] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.385369] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.386251] ? __pfx_lock_acquire+0x10/0x10 [ 31.386902] ? __pfx_mmap_region+0x10/0x10 [ 31.387544] ? security_mmap_addr+0x7d/0xa0 [ 31.388189] ? get_unmapped_area+0x1f5/0x3f0 [ 31.388865] do_mmap+0x854/0xf00 [ 31.389388] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.389982] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.390664] ksys_mmap_pgoff+0x3af/0x500 [ 31.391285] do_syscall_64+0x3f/0x90 [ 31.391874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.392671] RIP: 0033:0x7f3c3b2ddd82 [ 31.393259] 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 [ 31.395871] RSP: 002b:00007ffc025536f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.397008] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c3b2ddd82 [ 31.398056] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c3a717000 [ 31.399105] RBP: 00007f3c3a717000 R08: 0000000000000009 R09: 0000000000001000 [ 31.400141] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b59fdb1ec0 [ 31.401198] R13: 00007ffc02553710 R14: 00007ffc02553740 R15: 00007ffc02553aa0 [ 31.402260] [ 31.402609] [ 31.402869] Allocated by task 214: [ 31.403393] kasan_save_stack+0x22/0x50 [ 31.404004] kasan_set_track+0x25/0x30 [ 31.404605] __kasan_slab_alloc+0x59/0x70 [ 31.405274] kmem_cache_alloc+0x16b/0x370 [ 31.405903] vm_area_dup+0x20/0x160 [ 31.406457] __split_vma+0x170/0x950 [ 31.407027] split_vma+0xc6/0x110 [ 31.407558] mprotect_fixup+0x8d2/0xb30 [ 31.408174] do_mprotect_pkey+0x87e/0xd40 [ 31.408814] __x64_sys_mprotect+0x78/0xc0 [ 31.409449] do_syscall_64+0x3f/0x90 [ 31.410026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.410809] [ 31.411069] Freed by task 204: [ 31.411542] kasan_save_stack+0x22/0x50 [ 31.412152] kasan_set_track+0x25/0x30 [ 31.412776] kasan_save_free_info+0x2b/0x50 [ 31.413425] __kasan_slab_free+0x10a/0x190 [ 31.414062] kmem_cache_free+0x10d/0x4d0 [ 31.414674] rcu_core+0x8c8/0x2860 [ 31.415213] __do_softirq+0x1b7/0x7d4 [ 31.415789] [ 31.416056] Last potentially related work creation: [ 31.416778] kasan_save_stack+0x22/0x50 [ 31.417390] __kasan_record_aux_stack+0x8e/0xa0 [ 31.418082] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.418862] remove_vma+0x139/0x170 [ 31.419402] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.420087] do_vmi_munmap+0x1f1/0x2b0 [ 31.420697] __vm_munmap+0x138/0x3a0 [ 31.421277] __x64_sys_munmap+0x59/0x80 [ 31.421883] do_syscall_64+0x3f/0x90 [ 31.422457] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.423243] [ 31.423497] The buggy address belongs to the object at ffff888009083828 [ 31.423497] which belongs to the cache vm_area_struct of size 168 [ 31.425341] The buggy address is located 88 bytes inside of [ 31.425341] freed 168-byte region [ffff888009083828, ffff8880090838d0) [ 31.427083] [ 31.427338] The buggy address belongs to the physical page: [ 31.428160] page:00000000c4272a0f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9083 [ 31.429499] memcg:ffff88800f27df01 [ 31.430022] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.430814] page_type: 0xffffffff() [ 31.431361] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.432502] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f27df01 [ 31.433633] page dumped because: kasan: bad access detected [ 31.434451] [ 31.434709] Memory state around the buggy address: [ 31.435417] ffff888009083780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.436472] ffff888009083800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.437544] >ffff888009083880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.438590] ^ [ 31.439094] ffff888009083900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.440156] ffff888009083980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.441222] ================================================================== [ 31.442401] Disabling lock debugging due to kernel taint [ 33.466068] BUG: Bad rss-counter state mm:00000000a050e6c1 type:MM_FILEPAGES val:33 [ 33.466757] BUG: Bad rss-counter state mm:00000000a050e6c1 type:MM_ANONPAGES val:22 [ 33.869687] BUG: Bad rss-counter state mm:000000004bf91542 type:MM_FILEPAGES val:33 [ 33.871208] BUG: Bad rss-counter state mm:000000004bf91542 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35091' (ECDSA) to the list of known hosts. 2023/06/21 07:27:33 fuzzer started 2023/06/21 07:27:33 dialing manager at localhost:36067 2023/06/21 07:27:33 checking machine... 2023/06/21 07:27:33 checking revisions... [ 34.562592] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:27:33 testing simple program... [ 34.611758] cgroup: Unknown subsys name 'net' [ 34.658398] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:27:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888019f13680 RSI=ffffffff82146aca RDI=ffff888019bea688 RBP=1ffff1100204df30 RSP=ffff88801026f970 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff888019bea688 R13=ffffffff82146aca R14=ffff88801026fc80 R15=ffff88801026fc48 RIP=ffffffff812d8699 RFL=00000216 [----AP-] 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 00007f9a90635900 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=00007fffdce72000 CR3=000000000e9ee000 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=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 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=00007f2b7d4f9320 CR3=000000000c702000 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=dab0ab5f51f6a485934fc15451a44a69 XMM02=ec2efd57dc4c00df000000000011b300 XMM03=63706ae53f856de0000000000011b3d0 XMM04=85dbb4fbdc990f4800000000000ae988 XMM05=ca8f175ed73e044e0000000000132328 XMM06=c291bd5c70af25b90000000000131d20 XMM07=e042d86d42eb936e00000000001222f8 XMM08=63706ae53f856de0000000000011b3d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000