syzkaller login: [ 60.614222] BUG: Bad rss-counter state mm:000000002c863737 type:MM_FILEPAGES val:33 [ 60.614903] BUG: Bad rss-counter state mm:000000002c863737 type:MM_ANONPAGES val:22 [ 60.746624] ================================================================== [ 60.747235] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.747839] Read of size 8 at addr ffff888016fc94e0 by task sshd/220 [ 60.748300] [ 60.748438] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.748957] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.749549] Call Trace: [ 60.749745] [ 60.749975] dump_stack_lvl+0x91/0xf0 [ 60.750284] print_report+0xcc/0x620 [ 60.750590] ? __virt_addr_valid+0x102/0x340 [ 60.751166] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.751545] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.751952] kasan_report+0xbe/0xf0 [ 60.752272] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.752690] vma_interval_tree_remove+0xc75/0xec0 [ 60.753103] vma_prepare+0xc54/0x11a0 [ 60.753402] __split_vma+0x5af/0x950 [ 60.753819] ? __pfx___split_vma+0x10/0x10 [ 60.754232] ? find_held_lock+0x2c/0x110 [ 60.754655] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.755132] ? lock_is_held_type+0x9f/0x120 [ 60.755586] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.756088] ? mtree_range_walk+0x632/0x900 [ 60.756432] ? mas_walk+0x5c7/0x7c0 [ 60.756754] do_vmi_munmap+0x1f1/0x2b0 [ 60.757083] mmap_region+0x1f9/0x2660 [ 60.757406] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.757753] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.758286] ? __pfx_lock_acquire+0x10/0x10 [ 60.758710] ? __pfx_mmap_region+0x10/0x10 [ 60.759117] ? security_mmap_addr+0x7d/0xa0 [ 60.759512] ? get_unmapped_area+0x1f5/0x3f0 [ 60.759907] do_mmap+0x854/0xf00 [ 60.760219] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.760635] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.761071] ksys_mmap_pgoff+0x3af/0x500 [ 60.761464] do_syscall_64+0x3f/0x90 [ 60.761850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.762299] RIP: 0033:0x7fdd962ead82 [ 60.762661] 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 [ 60.764218] RSP: 002b:00007fffde6c1098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.764932] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdd962ead82 [ 60.765602] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdd95724000 [ 60.766353] RBP: 00007fdd95724000 R08: 0000000000000009 R09: 0000000000001000 [ 60.767028] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb21031ec0 [ 60.767610] R13: 00007fffde6c10b0 R14: 00007fffde6c10e0 R15: 00007fffde6c1440 [ 60.768212] [ 60.768393] [ 60.768543] Allocated by task 213: [ 60.768845] kasan_save_stack+0x22/0x50 [ 60.769205] kasan_set_track+0x25/0x30 [ 60.769549] __kasan_slab_alloc+0x59/0x70 [ 60.769941] kmem_cache_alloc+0x16b/0x370 [ 60.770289] vm_area_dup+0x20/0x160 [ 60.770583] __split_vma+0x170/0x950 [ 60.770873] split_vma+0xc6/0x110 [ 60.771149] mprotect_fixup+0x8d2/0xb30 [ 60.771462] do_mprotect_pkey+0x87e/0xd40 [ 60.771784] __x64_sys_mprotect+0x78/0xc0 [ 60.772134] do_syscall_64+0x3f/0x90 [ 60.772494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.773047] [ 60.773205] Freed by task 213: [ 60.773496] kasan_save_stack+0x22/0x50 [ 60.773931] kasan_set_track+0x25/0x30 [ 60.774305] kasan_save_free_info+0x2b/0x50 [ 60.774711] __kasan_slab_free+0x10a/0x190 [ 60.775116] kmem_cache_free+0x10d/0x4d0 [ 60.775465] rcu_core+0x8c8/0x2860 [ 60.775745] __do_softirq+0x1b7/0x7d4 [ 60.776037] [ 60.776171] Last potentially related work creation: [ 60.776536] kasan_save_stack+0x22/0x50 [ 60.776847] __kasan_record_aux_stack+0x8e/0xa0 [ 60.777220] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.777677] remove_vma+0x139/0x170 [ 60.778061] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.778453] do_vmi_munmap+0x1f1/0x2b0 [ 60.778790] __vm_munmap+0x138/0x3a0 [ 60.779092] __x64_sys_munmap+0x59/0x80 [ 60.779412] do_syscall_64+0x3f/0x90 [ 60.779728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.780139] [ 60.780291] The buggy address belongs to the object at ffff888016fc9488 [ 60.780291] which belongs to the cache vm_area_struct of size 168 [ 60.781396] The buggy address is located 88 bytes inside of [ 60.781396] freed 168-byte region [ffff888016fc9488, ffff888016fc9530) [ 60.782478] [ 60.782636] The buggy address belongs to the physical page: [ 60.783116] page:000000009ad6aa37 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16fc9 [ 60.783824] memcg:ffff888015d3f501 [ 60.784098] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.784499] page_type: 0xffffffff() [ 60.784785] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.785432] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015d3f501 [ 60.786121] page dumped because: kasan: bad access detected [ 60.786608] [ 60.786775] Memory state around the buggy address: [ 60.787199] ffff888016fc9380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.787814] ffff888016fc9400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 60.788455] >ffff888016fc9480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.789076] ^ [ 60.789601] ffff888016fc9500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 60.790246] ffff888016fc9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.790871] ================================================================== [ 60.791757] Disabling lock debugging due to kernel taint [ 62.106478] BUG: Bad rss-counter state mm:0000000098ddb7c3 type:MM_FILEPAGES val:33 [ 62.107703] BUG: Bad rss-counter state mm:0000000098ddb7c3 type:MM_ANONPAGES val:22 [ 62.516804] BUG: Bad rss-counter state mm:00000000efc32b8e type:MM_FILEPAGES val:33 [ 62.517916] BUG: Bad rss-counter state mm:00000000efc32b8e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36718' (ECDSA) to the list of known hosts. 2023/06/21 09:26:55 fuzzer started 2023/06/21 09:26:55 dialing manager at localhost:36067 2023/06/21 09:26:55 checking machine... 2023/06/21 09:26:55 checking revisions... [ 63.282947] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:26:55 testing simple program... [ 63.347085] cgroup: Unknown subsys name 'net' [ 63.408142] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:26:55 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000007 RCX=ffffffff8113b199 RDX=ffff888016fd1b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800f038570 RSP=ffff8880165d7e90 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000002 R13=0000000000100173 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff814c086b RFL=00000293 [--S-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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efdb1e8b900 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=00007ffc5bab384c CR3=000000000ca7c000 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=00000000000000000000000000000000 XMM02=000000000000000000000000000000ff XMM03=6eca0b17fb8893fa4e9f2b8b0dc45d6b XMM04=c350f167837145c99304c1fdb49d4b02 XMM05=000000000000000000000000000000ff XMM06=6e500b17837145c94e042b8b0d9d4b02 XMM07=672065736f6c635f6e6f69737365733a 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=00007fd839b96560 CR3=000000001687c000 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=2034353a36323a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a36323a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000