syzkaller login: [ 40.428317] BUG: Bad rss-counter state mm:00000000637459ef type:MM_FILEPAGES val:33 [ 40.429981] BUG: Bad rss-counter state mm:00000000637459ef type:MM_ANONPAGES val:22 [ 40.590868] ================================================================== [ 40.591814] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.592809] Read of size 8 at addr ffff8880169b1c20 by task sshd/220 [ 40.593707] [ 40.593935] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.594868] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.595900] Call Trace: [ 40.596237] [ 40.596528] dump_stack_lvl+0x91/0xf0 [ 40.597047] print_report+0xcc/0x620 [ 40.597549] ? __virt_addr_valid+0x102/0x340 [ 40.598149] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.598809] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.599461] kasan_report+0xbe/0xf0 [ 40.599959] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.600613] vma_interval_tree_remove+0xc75/0xec0 [ 40.601239] vma_prepare+0xc54/0x11a0 [ 40.601738] __split_vma+0x5af/0x950 [ 40.602236] ? __pfx___split_vma+0x10/0x10 [ 40.602823] ? find_held_lock+0x2c/0x110 [ 40.603368] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.603959] ? lock_is_held_type+0x9f/0x120 [ 40.604525] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.605168] ? mtree_range_walk+0x632/0x900 [ 40.605785] ? mas_walk+0x5c7/0x7c0 [ 40.606295] do_vmi_munmap+0x1f1/0x2b0 [ 40.606811] mmap_region+0x1f9/0x2660 [ 40.607317] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.607853] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.608598] ? __pfx_lock_acquire+0x10/0x10 [ 40.609167] ? __pfx_mmap_region+0x10/0x10 [ 40.609715] ? security_mmap_addr+0x7d/0xa0 [ 40.610271] ? get_unmapped_area+0x1f5/0x3f0 [ 40.610848] do_mmap+0x854/0xf00 [ 40.611301] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.611814] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.612399] ksys_mmap_pgoff+0x3af/0x500 [ 40.612922] do_syscall_64+0x3f/0x90 [ 40.613412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.614079] RIP: 0033:0x7f75d33ded82 [ 40.614574] 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 [ 40.616826] RSP: 002b:00007ffd58e35ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.617774] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f75d33ded82 [ 40.618663] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f75d2818000 [ 40.619538] RBP: 00007f75d2818000 R08: 0000000000000009 R09: 0000000000001000 [ 40.620432] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f8282a5980 [ 40.621327] R13: 00007ffd58e36010 R14: 00007ffd58e36040 R15: 00007ffd58e363a0 [ 40.622229] [ 40.622543] [ 40.622771] Allocated by task 213: [ 40.623232] kasan_save_stack+0x22/0x50 [ 40.623768] kasan_set_track+0x25/0x30 [ 40.624297] __kasan_slab_alloc+0x59/0x70 [ 40.624842] kmem_cache_alloc+0x16b/0x370 [ 40.625368] vm_area_dup+0x20/0x160 [ 40.625822] __split_vma+0x170/0x950 [ 40.626307] split_vma+0xc6/0x110 [ 40.626743] mprotect_fixup+0x8d2/0xb30 [ 40.627250] do_mprotect_pkey+0x87e/0xd40 [ 40.627768] __x64_sys_mprotect+0x78/0xc0 [ 40.628291] do_syscall_64+0x3f/0x90 [ 40.628767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.629406] [ 40.629616] Freed by task 213: [ 40.630008] kasan_save_stack+0x22/0x50 [ 40.630522] kasan_set_track+0x25/0x30 [ 40.631011] kasan_save_free_info+0x2b/0x50 [ 40.631548] __kasan_slab_free+0x10a/0x190 [ 40.632088] kmem_cache_free+0x10d/0x4d0 [ 40.632606] rcu_core+0x8c8/0x2860 [ 40.633051] __do_softirq+0x1b7/0x7d4 [ 40.633526] [ 40.633742] Last potentially related work creation: [ 40.634332] kasan_save_stack+0x22/0x50 [ 40.634850] __kasan_record_aux_stack+0x8e/0xa0 [ 40.635423] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.636061] remove_vma+0x139/0x170 [ 40.636509] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.637072] do_vmi_munmap+0x1f1/0x2b0 [ 40.637553] __vm_munmap+0x138/0x3a0 [ 40.638026] __x64_sys_munmap+0x59/0x80 [ 40.638538] do_syscall_64+0x3f/0x90 [ 40.639007] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.639640] [ 40.639857] Second to last potentially related work creation: [ 40.640528] kasan_save_stack+0x22/0x50 [ 40.641032] __kasan_record_aux_stack+0x8e/0xa0 [ 40.641598] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.642243] remove_vma+0x139/0x170 [ 40.642700] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.643252] do_vmi_munmap+0x1f1/0x2b0 [ 40.643744] mmap_region+0x1f9/0x2660 [ 40.644224] do_mmap+0x854/0xf00 [ 40.644657] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.645140] ksys_mmap_pgoff+0x7d/0x500 [ 40.645627] do_syscall_64+0x3f/0x90 [ 40.646097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.646750] [ 40.646969] The buggy address belongs to the object at ffff8880169b1bc8 [ 40.646969] which belongs to the cache vm_area_struct of size 168 [ 40.648417] The buggy address is located 88 bytes inside of [ 40.648417] freed 168-byte region [ffff8880169b1bc8, ffff8880169b1c70) [ 40.649802] [ 40.650019] The buggy address belongs to the physical page: [ 40.650676] page:00000000ee6c73b6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169b1 [ 40.651766] memcg:ffff88800cfb5101 [ 40.652190] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.652830] page_type: 0xffffffff() [ 40.653280] raw: 0100000000000200 ffff88800879fc80 ffffea0000361ec0 dead000000000002 [ 40.654200] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cfb5101 [ 40.655126] page dumped because: kasan: bad access detected [ 40.655798] [ 40.656014] Memory state around the buggy address: [ 40.656601] ffff8880169b1b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.657452] ffff8880169b1b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 40.658305] >ffff8880169b1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 40.659145] ^ [ 40.659670] ffff8880169b1c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 40.660531] ffff8880169b1d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 40.661385] ================================================================== [ 40.662362] Disabling lock debugging due to kernel taint [ 43.308322] BUG: Bad rss-counter state mm:000000002526137a type:MM_FILEPAGES val:33 [ 43.309086] BUG: Bad rss-counter state mm:000000002526137a type:MM_ANONPAGES val:22 [ 43.751579] BUG: Bad rss-counter state mm:00000000618cb6b5 type:MM_FILEPAGES val:33 [ 43.752335] BUG: Bad rss-counter state mm:00000000618cb6b5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29785' (ECDSA) to the list of known hosts. 2023/06/19 21:00:55 fuzzer started 2023/06/19 21:00:55 dialing manager at localhost:44161 2023/06/19 21:00:55 checking machine... 2023/06/19 21:00:55 checking revisions... [ 44.443261] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:00:55 testing simple program... [ 44.491997] cgroup: Unknown subsys name 'net' [ 44.551653] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:00:45 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff8186bd16 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800d447400 RSP=ffff888016f67eb8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800f5ad1c0 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c01d0 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 00007f1fbee91900 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=00007f1fbf448618 CR3=000000001cb06000 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=ffff88800f070001 RBX=ffff88800f06fd48 RCX=0000000000000001 RDX=ffff88800f06fd50 RSI=ffff88800f06fd38 RDI=ffff88800f06fa80 RBP=ffff88800f068000 RSP=ffff88800f06fa00 R8 =0000000000000001 R9 =ffff88800f06fab0 R10=0000000000038001 R11=0000000000020c48 R12=ffff88800f06fad0 R13=ffff88800f06fab8 R14=ffff88800f06fd38 R15=ffff88800f06fa70 RIP=ffffffff81131cda RFL=00000202 [-------] 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 00007f762c1778c0 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=00007ffd39e04988 CR3=000000000da1e000 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=00000000000000000000000000000000 XMM02=00000000000000ff0000000000ff0000 XMM03=00005611f2e7cb3000005611f2e7d6c0 XMM04=000000030000000000005611f2e7cb30 XMM05=00005611f2e93a5000005611f2e723d0 XMM06=000000000000000000000000ffffffff XMM07=00000000000000000000000000000000 XMM08=732f636f72702f006b63616d7300632e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000