syzkaller login: [ 31.129884] BUG: Bad rss-counter state mm:000000007fdc871d type:MM_FILEPAGES val:33 [ 31.131120] BUG: Bad rss-counter state mm:000000007fdc871d type:MM_ANONPAGES val:22 [ 31.168665] ================================================================== [ 31.169737] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.170717] Read of size 8 at addr ffff88801453c140 by task sshd/219 [ 31.171745] [ 31.172082] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.172927] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.174030] Call Trace: [ 31.174398] [ 31.174674] dump_stack_lvl+0x91/0xf0 [ 31.175225] print_report+0xcc/0x620 [ 31.175698] ? __virt_addr_valid+0x102/0x340 [ 31.176259] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.176932] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.177655] kasan_report+0xbe/0xf0 [ 31.178161] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.178769] vma_interval_tree_remove+0xc75/0xec0 [ 31.179358] vma_prepare+0xc54/0x11a0 [ 31.179824] __split_vma+0x5af/0x950 [ 31.180286] ? __pfx___split_vma+0x10/0x10 [ 31.180803] ? find_held_lock+0x2c/0x110 [ 31.181348] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.181904] ? lock_is_held_type+0x9f/0x120 [ 31.182447] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.183039] ? mtree_range_walk+0x632/0x900 [ 31.183578] ? mas_walk+0x5c7/0x7c0 [ 31.184044] do_vmi_munmap+0x1f1/0x2b0 [ 31.184528] mmap_region+0x1f9/0x2660 [ 31.184999] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.185531] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.186242] ? __pfx_lock_acquire+0x10/0x10 [ 31.186761] ? __pfx_mmap_region+0x10/0x10 [ 31.187281] ? security_mmap_addr+0x7d/0xa0 [ 31.187800] ? get_unmapped_area+0x1f5/0x3f0 [ 31.188341] do_mmap+0x854/0xf00 [ 31.188771] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.189297] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.189853] ksys_mmap_pgoff+0x3af/0x500 [ 31.190366] do_syscall_64+0x3f/0x90 [ 31.190836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.191470] RIP: 0033:0x7f1a2ba67d82 [ 31.191920] 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 [ 31.194025] RSP: 002b:00007fff9cb26ad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.194926] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1a2ba67d82 [ 31.195757] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1a2aea1000 [ 31.196601] RBP: 00007f1a2aea1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.197465] R10: 0000000000000812 R11: 0000000000000206 R12: 00005579a4f8bec0 [ 31.198330] R13: 00007fff9cb26af0 R14: 00007fff9cb26b20 R15: 00007fff9cb26e80 [ 31.199171] [ 31.199455] [ 31.199666] Allocated by task 212: [ 31.200084] kasan_save_stack+0x22/0x50 [ 31.200578] kasan_set_track+0x25/0x30 [ 31.201067] __kasan_slab_alloc+0x59/0x70 [ 31.201613] kmem_cache_alloc+0x16b/0x370 [ 31.202142] vm_area_dup+0x20/0x160 [ 31.202590] __split_vma+0x170/0x950 [ 31.203055] split_vma+0xc6/0x110 [ 31.203488] mprotect_fixup+0x8d2/0xb30 [ 31.203976] do_mprotect_pkey+0x87e/0xd40 [ 31.204485] __x64_sys_mprotect+0x78/0xc0 [ 31.205003] do_syscall_64+0x3f/0x90 [ 31.205503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.206148] [ 31.206364] Freed by task 212: [ 31.206745] kasan_save_stack+0x22/0x50 [ 31.207239] kasan_set_track+0x25/0x30 [ 31.207724] kasan_save_free_info+0x2b/0x50 [ 31.208247] __kasan_slab_free+0x10a/0x190 [ 31.208770] kmem_cache_free+0x10d/0x4d0 [ 31.209307] rcu_core+0x8c8/0x2860 [ 31.209746] __do_softirq+0x1b7/0x7d4 [ 31.210220] [ 31.210434] Last potentially related work creation: [ 31.211002] kasan_save_stack+0x22/0x50 [ 31.211494] __kasan_record_aux_stack+0x8e/0xa0 [ 31.212050] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.212676] remove_vma+0x139/0x170 [ 31.213147] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.213738] do_vmi_munmap+0x1f1/0x2b0 [ 31.214232] __vm_munmap+0x138/0x3a0 [ 31.214698] __x64_sys_munmap+0x59/0x80 [ 31.215203] do_syscall_64+0x3f/0x90 [ 31.215679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.216314] [ 31.216535] The buggy address belongs to the object at ffff88801453c0e8 [ 31.216535] which belongs to the cache vm_area_struct of size 168 [ 31.218029] The buggy address is located 88 bytes inside of [ 31.218029] freed 168-byte region [ffff88801453c0e8, ffff88801453c190) [ 31.219439] [ 31.219659] The buggy address belongs to the physical page: [ 31.220331] page:00000000b230d551 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1453c [ 31.221456] memcg:ffff888016d8c601 [ 31.221879] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.222539] page_type: 0xffffffff() [ 31.222993] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.223908] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d8c601 [ 31.224802] page dumped because: kasan: bad access detected [ 31.225495] [ 31.225712] Memory state around the buggy address: [ 31.226304] ffff88801453c000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.227155] ffff88801453c080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.228018] >ffff88801453c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.228891] ^ [ 31.229569] ffff88801453c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.230450] ffff88801453c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.231324] ================================================================== [ 31.232250] Disabling lock debugging due to kernel taint [ 33.179598] BUG: Bad rss-counter state mm:000000007072ba02 type:MM_FILEPAGES val:33 [ 33.181051] BUG: Bad rss-counter state mm:000000007072ba02 type:MM_ANONPAGES val:22 [ 33.658030] BUG: Bad rss-counter state mm:0000000025888dcf type:MM_FILEPAGES val:33 [ 33.659239] BUG: Bad rss-counter state mm:0000000025888dcf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6784' (ECDSA) to the list of known hosts. 2023/06/21 06:11:57 fuzzer started 2023/06/21 06:11:57 dialing manager at localhost:36067 2023/06/21 06:11:57 checking machine... 2023/06/21 06:11:57 checking revisions... [ 34.388986] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:11:57 testing simple program... [ 34.444766] cgroup: Unknown subsys name 'net' [ 34.511673] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:11:57 Registers: info registers vcpu 0 RAX=ffffffff864b2031 RBX=0000000000000001 RCX=ffffffff864b202c RDX=0000000000000002 RSI=0000000000000001 RDI=ffffffff8604ebc4 RBP=ffff88801c9cfa00 RSP=ffff88801c9cf938 R8 =ffffffff864b2008 R9 =ffff88801c9cf9e8 R10=0000000000038001 R11=00000000000b5080 R12=ffff88801c9cfa08 R13=ffff88801c9cf9f0 R14=ffff88801c9cf9e9 R15=ffff88801c9cf9a8 RIP=ffffffff81130a72 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 00007ff5e16e6900 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=00007ff5e1c9e0b0 CR3=000000001b5ac000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=ffff888008c04400 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=00007f0a57c03450 CR3=0000000013a44000 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=7805bf031007d198f04d5f8d1bc202e4 XMM02=000000000011a010eff9b2d0a8fce9cb XMM03=000000000011a0e02c67c8bc2e329bc3 XMM04=c05bf7b42a16d7ac00000000000ae988 XMM05=19e9129bd510f23500000000001316c0 XMM06=86f5f16703e12e220000000000130528 XMM07=e042d86d42eb936e0000000000121b70 XMM08=380b5e1a6434770d000000000011a0e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000