syzkaller login: [ 30.465913] BUG: Bad rss-counter state mm:00000000969dea2c type:MM_FILEPAGES val:33 [ 30.467292] BUG: Bad rss-counter state mm:00000000969dea2c type:MM_ANONPAGES val:22 [ 30.627895] ================================================================== [ 30.628886] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.629900] Read of size 8 at addr ffff88800cac74e0 by task sshd/220 [ 30.630767] [ 30.630999] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.632086] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.633171] Call Trace: [ 30.633515] [ 30.633980] dump_stack_lvl+0x91/0xf0 [ 30.634617] print_report+0xcc/0x620 [ 30.635229] ? __virt_addr_valid+0x102/0x340 [ 30.635927] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.636698] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.637430] kasan_report+0xbe/0xf0 [ 30.637986] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.638730] vma_interval_tree_remove+0xc75/0xec0 [ 30.639434] vma_prepare+0xc54/0x11a0 [ 30.640002] __split_vma+0x5af/0x950 [ 30.640562] ? __pfx___split_vma+0x10/0x10 [ 30.641187] ? find_held_lock+0x2c/0x110 [ 30.641799] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.642458] ? lock_is_held_type+0x9f/0x120 [ 30.643120] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.643725] ? mtree_range_walk+0x632/0x900 [ 30.644277] ? mas_walk+0x5c7/0x7c0 [ 30.644751] do_vmi_munmap+0x1f1/0x2b0 [ 30.645250] mmap_region+0x1f9/0x2660 [ 30.645729] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.646238] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.646972] ? __pfx_lock_acquire+0x10/0x10 [ 30.647505] ? __pfx_mmap_region+0x10/0x10 [ 30.648041] ? security_mmap_addr+0x7d/0xa0 [ 30.648575] ? get_unmapped_area+0x1f5/0x3f0 [ 30.649123] do_mmap+0x854/0xf00 [ 30.649560] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.650058] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.650627] ksys_mmap_pgoff+0x3af/0x500 [ 30.651133] do_syscall_64+0x3f/0x90 [ 30.651614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.652258] RIP: 0033:0x7ff1c21ead82 [ 30.652723] 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 [ 30.654879] RSP: 002b:00007ffcf01d9a58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.655795] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff1c21ead82 [ 30.656650] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff1c1624000 [ 30.657495] RBP: 00007ff1c1624000 R08: 0000000000000009 R09: 0000000000001000 [ 30.658341] R10: 0000000000000812 R11: 0000000000000206 R12: 00005565a013bec0 [ 30.659193] R13: 00007ffcf01d9a70 R14: 00007ffcf01d9aa0 R15: 00007ffcf01d9e00 [ 30.660055] [ 30.660343] [ 30.660556] Allocated by task 213: [ 30.660989] kasan_save_stack+0x22/0x50 [ 30.661496] kasan_set_track+0x25/0x30 [ 30.661992] __kasan_slab_alloc+0x59/0x70 [ 30.662511] kmem_cache_alloc+0x16b/0x370 [ 30.663042] vm_area_dup+0x20/0x160 [ 30.663490] __split_vma+0x170/0x950 [ 30.663952] split_vma+0xc6/0x110 [ 30.664393] mprotect_fixup+0x8d2/0xb30 [ 30.664905] do_mprotect_pkey+0x87e/0xd40 [ 30.665426] __x64_sys_mprotect+0x78/0xc0 [ 30.665944] do_syscall_64+0x3f/0x90 [ 30.666422] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.667089] [ 30.667306] Freed by task 19: [ 30.667705] kasan_save_stack+0x22/0x50 [ 30.668229] kasan_set_track+0x25/0x30 [ 30.668716] kasan_save_free_info+0x2b/0x50 [ 30.669252] __kasan_slab_free+0x10a/0x190 [ 30.669772] kmem_cache_free+0x10d/0x4d0 [ 30.670275] rcu_core+0x8c8/0x2860 [ 30.670728] __do_softirq+0x1b7/0x7d4 [ 30.671199] [ 30.671414] Last potentially related work creation: [ 30.672007] kasan_save_stack+0x22/0x50 [ 30.672611] __kasan_record_aux_stack+0x8e/0xa0 [ 30.673182] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.673825] remove_vma+0x139/0x170 [ 30.674285] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.674871] do_vmi_munmap+0x1f1/0x2b0 [ 30.675352] __vm_munmap+0x138/0x3a0 [ 30.675815] __x64_sys_munmap+0x59/0x80 [ 30.676305] do_syscall_64+0x3f/0x90 [ 30.676782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.677429] [ 30.677648] The buggy address belongs to the object at ffff88800cac7488 [ 30.677648] which belongs to the cache vm_area_struct of size 168 [ 30.679169] The buggy address is located 88 bytes inside of [ 30.679169] freed 168-byte region [ffff88800cac7488, ffff88800cac7530) [ 30.680623] [ 30.680845] The buggy address belongs to the physical page: [ 30.681521] page:00000000713fccc5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcac7 [ 30.682654] memcg:ffff888013434d01 [ 30.683099] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.683768] page_type: 0xffffffff() [ 30.684234] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.685198] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013434d01 [ 30.686133] page dumped because: kasan: bad access detected [ 30.686825] [ 30.687050] Memory state around the buggy address: [ 30.687640] ffff88800cac7380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.688533] ffff88800cac7400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.689424] >ffff88800cac7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.690311] ^ [ 30.691114] ffff88800cac7500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.691995] ffff88800cac7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.692877] ================================================================== [ 30.693836] Disabling lock debugging due to kernel taint [ 33.225377] BUG: Bad rss-counter state mm:000000009b16c441 type:MM_FILEPAGES val:33 [ 33.226315] BUG: Bad rss-counter state mm:000000009b16c441 type:MM_ANONPAGES val:22 [ 33.798980] BUG: Bad rss-counter state mm:0000000035303092 type:MM_FILEPAGES val:33 [ 33.800198] BUG: Bad rss-counter state mm:0000000035303092 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23493' (ECDSA) to the list of known hosts. 2023/06/21 00:59:44 fuzzer started 2023/06/21 00:59:44 dialing manager at localhost:36067 2023/06/21 00:59:44 checking machine... 2023/06/21 00:59:44 checking revisions... [ 34.469342] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:59:44 testing simple program... [ 34.522585] cgroup: Unknown subsys name 'net' [ 34.577714] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:59:44 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff85e16ac8 RCX=ffffffff81976418 RDX=0000000000000003 RSI=ffffffff8615de88 RDI=ffffffff85e16ac4 RBP=ffffffff85e16ac4 RSP=ffff88800f1af3c0 R8 =ffffffff8615de88 R9 =ffff88800f1af4b8 R10=0000000000038001 R11=0000000000027040 R12=ffffffff85e16ad0 R13=ffffffff85e16ac4 R14=ffffffff85e16ac4 R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000213 [----A-C] 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 00007f1a27fff700 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=00007f95ba6ed650 CR3=0000000015d52000 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=2034343a39353a3030203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a39353a3030203132 XMM08=3d656e696c646d632022656369767265 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=00007f7d7f9909c0 CR3=000000000d768000 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=8bb63739258f97bce6441757eb1163ae XMM02=ec2efd57dc4c00df00000000001193c0 XMM03=b791b154570622600000000000119490 XMM04=116761a03a1968d200000000000ae988 XMM05=8caeb669d867b0cd0000000000131928 XMM06=4fda316b135da52b00000000001309c8 XMM07=e042d86d42eb936e0000000000120ee0 XMM08=b791b154570622600000000000119490 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000