syzkaller login: [ 50.422987] BUG: Bad rss-counter state mm:00000000b2909e44 type:MM_FILEPAGES val:33 [ 50.423981] BUG: Bad rss-counter state mm:00000000b2909e44 type:MM_ANONPAGES val:22 [ 50.588167] ================================================================== [ 50.589277] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.590378] Read of size 8 at addr ffff88800cc743f8 by task sshd/228 [ 50.591380] [ 50.591643] CPU: 0 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.592719] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.593919] Call Trace: [ 50.594307] [ 50.594642] dump_stack_lvl+0x91/0xf0 [ 50.595223] print_report+0xcc/0x620 [ 50.595797] ? __virt_addr_valid+0x102/0x340 [ 50.596453] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.597193] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.597926] kasan_report+0xbe/0xf0 [ 50.598480] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.599223] vma_interval_tree_remove+0xc75/0xec0 [ 50.599932] vma_prepare+0xc54/0x11a0 [ 50.600499] __split_vma+0x5af/0x950 [ 50.601075] ? __pfx___split_vma+0x10/0x10 [ 50.601699] ? find_held_lock+0x2c/0x110 [ 50.602321] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.602999] ? lock_is_held_type+0x9f/0x120 [ 50.603643] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.604375] ? mtree_range_walk+0x632/0x900 [ 50.605045] ? mas_walk+0x5c7/0x7c0 [ 50.605602] do_vmi_munmap+0x1f1/0x2b0 [ 50.606181] mmap_region+0x1f9/0x2660 [ 50.606753] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.607364] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.608229] ? __pfx_lock_acquire+0x10/0x10 [ 50.608875] ? __pfx_mmap_region+0x10/0x10 [ 50.609510] ? security_mmap_addr+0x7d/0xa0 [ 50.610140] ? get_unmapped_area+0x1f5/0x3f0 [ 50.610785] do_mmap+0x854/0xf00 [ 50.611302] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.611881] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.612553] ksys_mmap_pgoff+0x3af/0x500 [ 50.613179] do_syscall_64+0x3f/0x90 [ 50.613744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.614511] RIP: 0033:0x7ffbb7240d82 [ 50.615058] 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 [ 50.617472] RSP: 002b:00007ffc882915e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.618330] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffbb7240d82 [ 50.619130] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffbb667a000 [ 50.619921] RBP: 00007ffbb667a000 R08: 0000000000000009 R09: 0000000000001000 [ 50.620731] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564967047ec0 [ 50.621526] R13: 00007ffc88291600 R14: 00007ffc88291630 R15: 00007ffc88291990 [ 50.622329] [ 50.622606] [ 50.622812] Allocated by task 221: [ 50.623217] kasan_save_stack+0x22/0x50 [ 50.623695] kasan_set_track+0x25/0x30 [ 50.624163] __kasan_slab_alloc+0x59/0x70 [ 50.624676] kmem_cache_alloc+0x16b/0x370 [ 50.625160] vm_area_dup+0x20/0x160 [ 50.625597] __split_vma+0x170/0x950 [ 50.626040] split_vma+0xc6/0x110 [ 50.626464] mprotect_fixup+0x8d2/0xb30 [ 50.626954] do_mprotect_pkey+0x87e/0xd40 [ 50.627458] __x64_sys_mprotect+0x78/0xc0 [ 50.627968] do_syscall_64+0x3f/0x90 [ 50.628420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.629057] [ 50.629272] Freed by task 19: [ 50.629644] kasan_save_stack+0x22/0x50 [ 50.630142] kasan_set_track+0x25/0x30 [ 50.630633] kasan_save_free_info+0x2b/0x50 [ 50.631161] __kasan_slab_free+0x10a/0x190 [ 50.631697] kmem_cache_free+0x10d/0x4d0 [ 50.632201] rcu_core+0x8c8/0x2860 [ 50.632643] __do_softirq+0x1b7/0x7d4 [ 50.633129] [ 50.633341] Last potentially related work creation: [ 50.633917] kasan_save_stack+0x22/0x50 [ 50.634412] __kasan_record_aux_stack+0x8e/0xa0 [ 50.634971] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.635603] remove_vma+0x139/0x170 [ 50.636051] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.636599] do_vmi_munmap+0x1f1/0x2b0 [ 50.637101] __vm_munmap+0x138/0x3a0 [ 50.637561] __x64_sys_munmap+0x59/0x80 [ 50.638052] do_syscall_64+0x3f/0x90 [ 50.638507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.639133] [ 50.639343] Second to last potentially related work creation: [ 50.640013] kasan_save_stack+0x22/0x50 [ 50.640506] __kasan_record_aux_stack+0x8e/0xa0 [ 50.641066] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.641689] remove_vma+0x139/0x170 [ 50.642129] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.642673] do_vmi_munmap+0x1f1/0x2b0 [ 50.643148] __vm_munmap+0x138/0x3a0 [ 50.643611] elf_map+0x26f/0x310 [ 50.644047] load_elf_binary+0xd82/0x5030 [ 50.644558] bprm_execve+0x803/0x1940 [ 50.645035] do_execveat_common+0x734/0x8e0 [ 50.645550] __x64_sys_execve+0x93/0xc0 [ 50.646037] do_syscall_64+0x3f/0x90 [ 50.646498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.647121] [ 50.647330] The buggy address belongs to the object at ffff88800cc743a0 [ 50.647330] which belongs to the cache vm_area_struct of size 168 [ 50.648789] The buggy address is located 88 bytes inside of [ 50.648789] freed 168-byte region [ffff88800cc743a0, ffff88800cc74448) [ 50.650170] [ 50.650378] The buggy address belongs to the physical page: [ 50.651029] page:000000006b4549f2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc74 [ 50.652097] memcg:ffff8880145cb701 [ 50.652513] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 50.653210] page_type: 0xffffffff() [ 50.653648] raw: 0100000000000200 ffff88800879fc80 ffffea0000256500 dead000000000005 [ 50.654549] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880145cb701 [ 50.655440] page dumped because: kasan: bad access detected [ 50.656090] [ 50.656296] Memory state around the buggy address: [ 50.656874] ffff88800cc74280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 50.657713] ffff88800cc74300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 50.658549] >ffff88800cc74380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 50.659379] ^ [ 50.660203] ffff88800cc74400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 50.661045] ffff88800cc74480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.661863] ================================================================== [ 50.662894] Disabling lock debugging due to kernel taint [ 53.062932] BUG: Bad rss-counter state mm:000000007c48edb6 type:MM_FILEPAGES val:33 [ 53.063909] BUG: Bad rss-counter state mm:000000007c48edb6 type:MM_ANONPAGES val:22 [ 53.530936] BUG: Bad rss-counter state mm:000000005ad5c1a8 type:MM_FILEPAGES val:33 [ 53.532168] BUG: Bad rss-counter state mm:000000005ad5c1a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32165' (ECDSA) to the list of known hosts. 2023/06/19 21:40:01 fuzzer started 2023/06/19 21:40:01 dialing manager at localhost:44161 2023/06/19 21:40:01 checking machine... 2023/06/19 21:40:01 checking revisions... [ 54.296453] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:40:02 testing simple program... [ 54.341907] cgroup: Unknown subsys name 'net' [ 54.400437] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:39:49 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff110032bce8a RSP=ffff8880195e7440 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=000010a0000010a0 R12=ffffffff8560b640 R13=ffffffff83ab421f R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff812d8ad3 RFL=00000247 [---Z-PC] 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 00007f8ac5a72900 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=00007f8ac6029618 CR3=0000000019528000 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=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=0000000000000001 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=00007f56d93f40e0 CR3=000000000ca2a000 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=b3a9f8fb0c8f21a69d440f7ec7c698f2 XMM02=ec2efd57dc4c00df00000000001202e0 XMM03=e16d216f1fbb423500000000001203b0 XMM04=d1cb7a3394cbe67300000000000ae988 XMM05=2e1a24d836e45bf60000000000135788 XMM06=94aac670ef06ff650000000000134e10 XMM07=e042d86d42eb936e00000000001241f0 XMM08=e16d216f1fbb423500000000001203b0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000