syzkaller login: [ 34.644250] BUG: Bad rss-counter state mm:000000002376d96a type:MM_FILEPAGES val:33 [ 34.645655] BUG: Bad rss-counter state mm:000000002376d96a type:MM_ANONPAGES val:22 [ 34.786718] ================================================================== [ 34.787653] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.788696] Read of size 8 at addr ffff88800cbf4228 by task sshd/221 [ 34.789464] [ 34.789680] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.790548] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.791589] Call Trace: [ 34.791909] <TASK> [ 34.792200] dump_stack_lvl+0x91/0xf0 [ 34.792708] print_report+0xcc/0x620 [ 34.793200] ? __virt_addr_valid+0x102/0x340 [ 34.793765] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.794386] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.795021] kasan_report+0xbe/0xf0 [ 34.795521] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.796168] vma_interval_tree_remove+0xc75/0xec0 [ 34.796783] vma_prepare+0xc54/0x11a0 [ 34.797270] __split_vma+0x5af/0x950 [ 34.797762] ? __pfx___split_vma+0x10/0x10 [ 34.798300] ? find_held_lock+0x2c/0x110 [ 34.798830] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.799400] ? lock_is_held_type+0x9f/0x120 [ 34.799955] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.800581] ? mtree_range_walk+0x632/0x900 [ 34.801150] ? mas_walk+0x5c7/0x7c0 [ 34.801630] do_vmi_munmap+0x1f1/0x2b0 [ 34.802136] mmap_region+0x1f9/0x2660 [ 34.802622] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.803165] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.803911] ? __pfx_lock_acquire+0x10/0x10 [ 34.804464] ? __pfx_mmap_region+0x10/0x10 [ 34.805019] ? security_mmap_addr+0x7d/0xa0 [ 34.805553] ? get_unmapped_area+0x1f5/0x3f0 [ 34.806112] do_mmap+0x854/0xf00 [ 34.806573] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.807081] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.807664] ksys_mmap_pgoff+0x3af/0x500 [ 34.808176] do_syscall_64+0x3f/0x90 [ 34.808655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.809308] RIP: 0033:0x7fe86dceed82 [ 34.809776] 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 [ 34.812295] RSP: 002b:00007ffd3755bad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.813567] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe86dceed82 [ 34.814736] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe86d128000 [ 34.815962] RBP: 00007fe86d128000 R08: 0000000000000009 R09: 0000000000001000 [ 34.817128] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb206a6d90 [ 34.818329] R13: 00007ffd3755baf0 R14: 00007ffd3755bb20 R15: 00007ffd3755be80 [ 34.819495] </TASK> [ 34.819905] [ 34.820191] Allocated by task 214: [ 34.820787] kasan_save_stack+0x22/0x50 [ 34.821486] kasan_set_track+0x25/0x30 [ 34.822166] __kasan_slab_alloc+0x59/0x70 [ 34.822887] kmem_cache_alloc+0x16b/0x370 [ 34.823602] vm_area_dup+0x20/0x160 [ 34.824229] __split_vma+0x170/0x950 [ 34.824849] split_vma+0xc6/0x110 [ 34.825434] mprotect_fixup+0x8d2/0xb30 [ 34.826108] do_mprotect_pkey+0x87e/0xd40 [ 34.826804] __x64_sys_mprotect+0x78/0xc0 [ 34.827526] do_syscall_64+0x3f/0x90 [ 34.828200] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.829003] [ 34.829249] Freed by task 214: [ 34.829701] kasan_save_stack+0x22/0x50 [ 34.830282] kasan_set_track+0x25/0x30 [ 34.830840] kasan_save_free_info+0x2b/0x50 [ 34.831443] __kasan_slab_free+0x10a/0x190 [ 34.832051] kmem_cache_free+0x10d/0x4d0 [ 34.832624] rcu_core+0x8c8/0x2860 [ 34.833128] __do_softirq+0x1b7/0x7d4 [ 34.833669] [ 34.833913] Last potentially related work creation: [ 34.834579] kasan_save_stack+0x22/0x50 [ 34.835159] __kasan_record_aux_stack+0x8e/0xa0 [ 34.835818] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.836563] remove_vma+0x139/0x170 [ 34.837076] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.837715] do_vmi_munmap+0x1f1/0x2b0 [ 34.838274] __vm_munmap+0x138/0x3a0 [ 34.838804] __x64_sys_munmap+0x59/0x80 [ 34.839374] do_syscall_64+0x3f/0x90 [ 34.839926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.840646] [ 34.840891] The buggy address belongs to the object at ffff88800cbf41d0 [ 34.840891] which belongs to the cache vm_area_struct of size 168 [ 34.842555] The buggy address is located 88 bytes inside of [ 34.842555] freed 168-byte region [ffff88800cbf41d0, ffff88800cbf4278) [ 34.844161] [ 34.844406] The buggy address belongs to the physical page: [ 34.845150] page:000000006841f8fe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbf4 [ 34.846375] memcg:ffff888015be8501 [ 34.846855] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.847596] page_type: 0xffffffff() [ 34.848112] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.849149] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015be8501 [ 34.850168] page dumped because: kasan: bad access detected [ 34.850908] [ 34.851152] Memory state around the buggy address: [ 34.851813] ffff88800cbf4100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.852784] ffff88800cbf4180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 34.853756] >ffff88800cbf4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 34.854718] ^ [ 34.855344] ffff88800cbf4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 34.856338] ffff88800cbf4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.857294] ================================================================== [ 34.858482] Disabling lock debugging due to kernel taint [ 36.883904] BUG: Bad rss-counter state mm:00000000f60922a0 type:MM_FILEPAGES val:33 [ 36.885239] BUG: Bad rss-counter state mm:00000000f60922a0 type:MM_ANONPAGES val:22 [ 37.425680] BUG: Bad rss-counter state mm:0000000063a2cc42 type:MM_FILEPAGES val:33 [ 37.426832] BUG: Bad rss-counter state mm:0000000063a2cc42 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3242' (ECDSA) to the list of known hosts. 2023/06/19 15:34:49 fuzzer started 2023/06/19 15:34:49 dialing manager at localhost:44161 2023/06/19 15:34:49 checking machine... 2023/06/19 15:34:49 checking revisions... [ 38.102335] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:34:50 testing simple program... [ 38.155969] cgroup: Unknown subsys name 'net' [ 38.197557] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:34:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860ab1aa RDX=1ffff1100d9c135c RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860ab1ae R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000979d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=0000000000000005 R15=ffff88806ce09a98 RIP=ffffffff81130b54 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 00007f992d5f6900 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=00007f992dbad618 CR3=000000000dfe2000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f18e474cda0 CR3=00000000198ea000 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=2039343a34333a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a34333a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000