syzkaller login: [ 30.989913] BUG: Bad rss-counter state mm:0000000003abff25 type:MM_FILEPAGES val:33 [ 30.991094] BUG: Bad rss-counter state mm:0000000003abff25 type:MM_ANONPAGES val:22 [ 31.134351] ================================================================== [ 31.135274] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.136225] Read of size 8 at addr ffff888015e37058 by task sshd/222 [ 31.137006] [ 31.137227] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.138227] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.139211] Call Trace: [ 31.139531] [ 31.139820] dump_stack_lvl+0x91/0xf0 [ 31.140337] print_report+0xcc/0x620 [ 31.140830] ? __virt_addr_valid+0x102/0x340 [ 31.141385] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.142009] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.142643] kasan_report+0xbe/0xf0 [ 31.143129] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.143756] vma_interval_tree_remove+0xc75/0xec0 [ 31.144356] vma_prepare+0xc54/0x11a0 [ 31.144835] __split_vma+0x5af/0x950 [ 31.145303] ? __pfx___split_vma+0x10/0x10 [ 31.145832] ? find_held_lock+0x2c/0x110 [ 31.146377] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.146956] ? lock_is_held_type+0x9f/0x120 [ 31.147500] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.148112] ? mtree_range_walk+0x632/0x900 [ 31.148668] ? mas_walk+0x5c7/0x7c0 [ 31.149151] do_vmi_munmap+0x1f1/0x2b0 [ 31.149644] mmap_region+0x1f9/0x2660 [ 31.150134] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.150646] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.151356] ? __pfx_lock_acquire+0x10/0x10 [ 31.151890] ? __pfx_mmap_region+0x10/0x10 [ 31.152417] ? security_mmap_addr+0x7d/0xa0 [ 31.152949] ? get_unmapped_area+0x1f5/0x3f0 [ 31.153494] do_mmap+0x854/0xf00 [ 31.153930] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.154436] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.155000] ksys_mmap_pgoff+0x3af/0x500 [ 31.155501] do_syscall_64+0x3f/0x90 [ 31.155977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.156618] RIP: 0033:0x7ff933e8bd82 [ 31.157075] 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 [ 31.159195] RSP: 002b:00007ffc20792a98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.160095] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff933e8bd82 [ 31.160956] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff9332c5000 [ 31.161822] RBP: 00007ff9332c5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.162687] R10: 0000000000000812 R11: 0000000000000206 R12: 000056224e485f70 [ 31.163550] R13: 00007ffc20792ab0 R14: 00007ffc20792ae0 R15: 00007ffc20792e40 [ 31.164413] [ 31.164711] [ 31.164934] Allocated by task 215: [ 31.165371] kasan_save_stack+0x22/0x50 [ 31.165884] kasan_set_track+0x25/0x30 [ 31.166400] __kasan_slab_alloc+0x59/0x70 [ 31.166927] kmem_cache_alloc+0x16b/0x370 [ 31.167449] vm_area_dup+0x20/0x160 [ 31.167906] __split_vma+0x170/0x950 [ 31.168374] split_vma+0xc6/0x110 [ 31.168823] mprotect_fixup+0x8d2/0xb30 [ 31.169342] do_mprotect_pkey+0x87e/0xd40 [ 31.169873] __x64_sys_mprotect+0x78/0xc0 [ 31.170408] do_syscall_64+0x3f/0x90 [ 31.170890] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.171528] [ 31.171742] Freed by task 19: [ 31.172132] kasan_save_stack+0x22/0x50 [ 31.172637] kasan_set_track+0x25/0x30 [ 31.173128] kasan_save_free_info+0x2b/0x50 [ 31.173657] __kasan_slab_free+0x10a/0x190 [ 31.174216] kmem_cache_free+0x10d/0x4d0 [ 31.174746] rcu_core+0x8c8/0x2860 [ 31.175201] __do_softirq+0x1b7/0x7d4 [ 31.175683] [ 31.175907] Last potentially related work creation: [ 31.176487] kasan_save_stack+0x22/0x50 [ 31.176994] __kasan_record_aux_stack+0x8e/0xa0 [ 31.177595] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.178269] remove_vma+0x139/0x170 [ 31.178722] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.179345] do_vmi_munmap+0x1f1/0x2b0 [ 31.179836] __vm_munmap+0x138/0x3a0 [ 31.180305] __x64_sys_munmap+0x59/0x80 [ 31.180806] do_syscall_64+0x3f/0x90 [ 31.181281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.181922] [ 31.182157] The buggy address belongs to the object at ffff888015e37000 [ 31.182157] which belongs to the cache vm_area_struct of size 168 [ 31.183647] The buggy address is located 88 bytes inside of [ 31.183647] freed 168-byte region [ffff888015e37000, ffff888015e370a8) [ 31.185056] [ 31.185275] The buggy address belongs to the physical page: [ 31.185932] page:00000000167309c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e37 [ 31.187037] memcg:ffff888018cde601 [ 31.187464] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.188120] page_type: 0xffffffff() [ 31.188568] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.189477] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018cde601 [ 31.190381] page dumped because: kasan: bad access detected [ 31.191044] [ 31.191261] Memory state around the buggy address: [ 31.191841] ffff888015e36f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.192691] ffff888015e36f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.193552] >ffff888015e37000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.194419] ^ [ 31.195148] ffff888015e37080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.195994] ffff888015e37100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.196845] ================================================================== [ 31.197749] Disabling lock debugging due to kernel taint [ 33.741272] BUG: Bad rss-counter state mm:00000000809f5f04 type:MM_FILEPAGES val:33 [ 33.742043] BUG: Bad rss-counter state mm:00000000809f5f04 type:MM_ANONPAGES val:22 [ 34.167772] BUG: Bad rss-counter state mm:000000007e23d69c type:MM_FILEPAGES val:33 [ 34.168547] BUG: Bad rss-counter state mm:000000007e23d69c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14486' (ECDSA) to the list of known hosts. 2023/06/20 20:06:35 fuzzer started 2023/06/20 20:06:36 dialing manager at localhost:36067 2023/06/20 20:06:36 checking machine... 2023/06/20 20:06:36 checking revisions... [ 34.861904] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:06:36 testing simple program... [ 34.910309] cgroup: Unknown subsys name 'net' [ 34.949130] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:06:35 Registers: info registers vcpu 0 RAX=ffff88809a757280 RBX=0000000000000000 RCX=0000000000000000 RDX=0000777f80000000 RSI=ffff88801a757280 RDI=ffff888000000000 RBP=ffffffff8366b8df RSP=ffff88801c887a78 R8 =ffffea0000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88801a757280 R13=ffff888008fae000 R14=ffffffff8366b8df R15=0000000000000001 RIP=ffffffff8180c995 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 00007f97b6393900 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=00007ffd2ce0d000 CR3=000000000e3e8000 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=00007fdad97756b0 CR3=00000000101d2000 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=379142446ee0438141494c1e44934396 XMM02=000000000011ac10eff9b2d0a8fce9cb XMM03=000000000011ace02c67c8bc2e329bc3 XMM04=e33efc50d3bf312600000000000ae988 XMM05=83594ee05b8d38950000000000132300 XMM06=d40e543543a538000000000000131168 XMM07=e042d86d42eb936e00000000001227a8 XMM08=2f87ad7df9d1cb8b000000000011ace0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000