syzkaller login: [ 30.067765] BUG: Bad rss-counter state mm:000000007afb9155 type:MM_FILEPAGES val:33 [ 30.069017] BUG: Bad rss-counter state mm:000000007afb9155 type:MM_ANONPAGES val:22 [ 30.111254] ================================================================== [ 30.112238] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.113409] Read of size 8 at addr ffff888018c535c8 by task sshd/220 [ 30.114234] [ 30.114467] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.115391] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.116461] Call Trace: [ 30.116805] [ 30.117111] dump_stack_lvl+0x91/0xf0 [ 30.117637] print_report+0xcc/0x620 [ 30.118169] ? __virt_addr_valid+0x102/0x340 [ 30.118769] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.119433] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.120095] kasan_report+0xbe/0xf0 [ 30.120624] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.121305] vma_interval_tree_remove+0xc75/0xec0 [ 30.121972] vma_prepare+0xc54/0x11a0 [ 30.122506] __split_vma+0x5af/0x950 [ 30.123027] ? __pfx___split_vma+0x10/0x10 [ 30.123619] ? find_held_lock+0x2c/0x110 [ 30.124198] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.125017] ? lock_is_held_type+0x9f/0x120 [ 30.125691] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.126450] ? mtree_range_walk+0x632/0x900 [ 30.127130] ? mas_walk+0x5c7/0x7c0 [ 30.127708] do_vmi_munmap+0x1f1/0x2b0 [ 30.128312] mmap_region+0x1f9/0x2660 [ 30.128950] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.129574] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.130458] ? __pfx_lock_acquire+0x10/0x10 [ 30.131117] ? __pfx_mmap_region+0x10/0x10 [ 30.131771] ? security_mmap_addr+0x7d/0xa0 [ 30.132440] ? get_unmapped_area+0x1f5/0x3f0 [ 30.133120] do_mmap+0x854/0xf00 [ 30.133659] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.134263] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.134956] ksys_mmap_pgoff+0x3af/0x500 [ 30.135585] do_syscall_64+0x3f/0x90 [ 30.136177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.136995] RIP: 0033:0x7f6ab656cd82 [ 30.137566] 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 [ 30.140202] RSP: 002b:00007ffcf13ffa78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.141338] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6ab656cd82 [ 30.142204] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6ab59a6000 [ 30.143058] RBP: 00007f6ab59a6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.143906] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ca9d78f70 [ 30.144756] R13: 00007ffcf13ffa90 R14: 00007ffcf13ffac0 R15: 00007ffcf13ffe20 [ 30.145607] [ 30.145909] [ 30.146127] Allocated by task 213: [ 30.146558] kasan_save_stack+0x22/0x50 [ 30.147059] kasan_set_track+0x25/0x30 [ 30.147542] __kasan_slab_alloc+0x59/0x70 [ 30.148059] kmem_cache_alloc+0x16b/0x370 [ 30.148581] vm_area_dup+0x20/0x160 [ 30.149032] __split_vma+0x170/0x950 [ 30.149491] split_vma+0xc6/0x110 [ 30.149925] mprotect_fixup+0x8d2/0xb30 [ 30.150419] do_mprotect_pkey+0x87e/0xd40 [ 30.150941] __x64_sys_mprotect+0x78/0xc0 [ 30.151460] do_syscall_64+0x3f/0x90 [ 30.152004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.152658] [ 30.152869] Freed by task 213: [ 30.153342] kasan_save_stack+0x22/0x50 [ 30.154024] kasan_set_track+0x25/0x30 [ 30.154696] kasan_save_free_info+0x2b/0x50 [ 30.155421] __kasan_slab_free+0x10a/0x190 [ 30.156096] kmem_cache_free+0x10d/0x4d0 [ 30.156628] rcu_core+0x8c8/0x2860 [ 30.157100] __do_softirq+0x1b7/0x7d4 [ 30.157578] [ 30.157809] Last potentially related work creation: [ 30.158396] kasan_save_stack+0x22/0x50 [ 30.158915] __kasan_record_aux_stack+0x8e/0xa0 [ 30.159497] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.160232] remove_vma+0x139/0x170 [ 30.160707] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.161267] do_vmi_munmap+0x1f1/0x2b0 [ 30.161762] __vm_munmap+0x138/0x3a0 [ 30.162229] __x64_sys_munmap+0x59/0x80 [ 30.162735] do_syscall_64+0x3f/0x90 [ 30.163209] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.163852] [ 30.164067] The buggy address belongs to the object at ffff888018c53570 [ 30.164067] which belongs to the cache vm_area_struct of size 168 [ 30.165533] The buggy address is located 88 bytes inside of [ 30.165533] freed 168-byte region [ffff888018c53570, ffff888018c53618) [ 30.166938] [ 30.167152] The buggy address belongs to the physical page: [ 30.167818] page:0000000017f9abc8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c53 [ 30.168925] memcg:ffff88800e94f601 [ 30.169352] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.169997] page_type: 0xffffffff() [ 30.170448] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.171358] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e94f601 [ 30.172266] page dumped because: kasan: bad access detected [ 30.172951] [ 30.173168] Memory state around the buggy address: [ 30.173744] ffff888018c53480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.174588] ffff888018c53500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.175488] >ffff888018c53580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.176410] ^ [ 30.177120] ffff888018c53600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.178015] ffff888018c53680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.178927] ================================================================== [ 30.179962] Disabling lock debugging due to kernel taint [ 32.383226] BUG: Bad rss-counter state mm:00000000784874e1 type:MM_FILEPAGES val:33 [ 32.384218] BUG: Bad rss-counter state mm:00000000784874e1 type:MM_ANONPAGES val:22 [ 32.890726] BUG: Bad rss-counter state mm:00000000029941e3 type:MM_FILEPAGES val:33 [ 32.891716] BUG: Bad rss-counter state mm:00000000029941e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17289' (ECDSA) to the list of known hosts. 2023/06/21 02:50:18 fuzzer started 2023/06/21 02:50:19 dialing manager at localhost:36067 2023/06/21 02:50:19 checking machine... 2023/06/21 02:50:19 checking revisions... [ 33.615036] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:50:19 testing simple program... [ 33.657009] cgroup: Unknown subsys name 'net' [ 33.708440] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:50:18 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=00007ffdd2c505d8 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=00007f5076c1f51000005631fdca2790 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=dffffc0000000000 RBX=1ffff110033f4f6b RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000012 RSP=ffff888019fa7b48 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000012 R11=0000000000000001 R12=ffff888008f7a808 R13=0000000000000cc0 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff812d8e6e 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 00007f1410e29900 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=00007f14113e10b0 CR3=0000000016448000 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=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