syzkaller login: [ 38.733864] BUG: Bad rss-counter state mm:0000000002cbe0e7 type:MM_FILEPAGES val:33 [ 38.735170] BUG: Bad rss-counter state mm:0000000002cbe0e7 type:MM_ANONPAGES val:22 [ 38.774899] ================================================================== [ 38.775590] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.776302] Read of size 8 at addr ffff88800ed37798 by task sshd/218 [ 38.776883] [ 38.777049] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.777696] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.778550] Call Trace: [ 38.778795] [ 38.779013] dump_stack_lvl+0x91/0xf0 [ 38.779382] print_report+0xcc/0x620 [ 38.779741] ? __virt_addr_valid+0x102/0x340 [ 38.780143] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.780593] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.781059] kasan_report+0xbe/0xf0 [ 38.781409] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.781861] vma_interval_tree_remove+0xc75/0xec0 [ 38.782318] vma_prepare+0xc54/0x11a0 [ 38.782673] __split_vma+0x5af/0x950 [ 38.783022] ? __pfx___split_vma+0x10/0x10 [ 38.783351] ? find_held_lock+0x2c/0x110 [ 38.783641] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.783954] ? lock_is_held_type+0x9f/0x120 [ 38.784251] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.784584] ? mtree_range_walk+0x632/0x900 [ 38.784893] ? mas_walk+0x5c7/0x7c0 [ 38.785156] do_vmi_munmap+0x1f1/0x2b0 [ 38.785427] mmap_region+0x1f9/0x2660 [ 38.785693] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.785977] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.786383] ? __pfx_lock_acquire+0x10/0x10 [ 38.786679] ? __pfx_mmap_region+0x10/0x10 [ 38.786973] ? security_mmap_addr+0x7d/0xa0 [ 38.787268] ? get_unmapped_area+0x1f5/0x3f0 [ 38.787574] do_mmap+0x854/0xf00 [ 38.787818] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.788094] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.788405] ksys_mmap_pgoff+0x3af/0x500 [ 38.788689] do_syscall_64+0x3f/0x90 [ 38.788957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.789319] RIP: 0033:0x7f2214b5cd82 [ 38.789572] 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 [ 38.790833] RSP: 002b:00007fff55efc338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.791369] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2214b5cd82 [ 38.791874] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2213f96000 [ 38.792340] RBP: 00007f2213f96000 R08: 0000000000000009 R09: 0000000000001000 [ 38.792801] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fef8527ec0 [ 38.793263] R13: 00007fff55efc350 R14: 00007fff55efc380 R15: 00007fff55efc6e0 [ 38.793728] [ 38.793889] [ 38.794007] Allocated by task 211: [ 38.794266] kasan_save_stack+0x22/0x50 [ 38.794563] kasan_set_track+0x25/0x30 [ 38.794861] __kasan_slab_alloc+0x59/0x70 [ 38.795162] kmem_cache_alloc+0x16b/0x370 [ 38.795449] vm_area_dup+0x20/0x160 [ 38.795700] __split_vma+0x170/0x950 [ 38.795955] split_vma+0xc6/0x110 [ 38.796194] mprotect_fixup+0x8d2/0xb30 [ 38.796471] do_mprotect_pkey+0x87e/0xd40 [ 38.796757] __x64_sys_mprotect+0x78/0xc0 [ 38.797044] do_syscall_64+0x3f/0x90 [ 38.797310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.797668] [ 38.797786] Freed by task 211: [ 38.798004] kasan_save_stack+0x22/0x50 [ 38.798286] kasan_set_track+0x25/0x30 [ 38.798555] kasan_save_free_info+0x2b/0x50 [ 38.798849] __kasan_slab_free+0x10a/0x190 [ 38.799140] kmem_cache_free+0x10d/0x4d0 [ 38.799435] rcu_core+0x8c8/0x2860 [ 38.799691] __do_softirq+0x1b7/0x7d4 [ 38.799969] [ 38.800094] Last potentially related work creation: [ 38.800431] kasan_save_stack+0x22/0x50 [ 38.800715] __kasan_record_aux_stack+0x8e/0xa0 [ 38.801042] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.801452] remove_vma+0x139/0x170 [ 38.801721] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.802045] do_vmi_munmap+0x1f1/0x2b0 [ 38.802325] __vm_munmap+0x138/0x3a0 [ 38.802578] __x64_sys_munmap+0x59/0x80 [ 38.802848] do_syscall_64+0x3f/0x90 [ 38.803107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.803454] [ 38.803570] Second to last potentially related work creation: [ 38.803940] kasan_save_stack+0x22/0x50 [ 38.804215] __kasan_record_aux_stack+0x8e/0xa0 [ 38.804526] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.804876] remove_vma+0x139/0x170 [ 38.805121] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.805424] do_vmi_munmap+0x1f1/0x2b0 [ 38.805688] mmap_region+0x1f9/0x2660 [ 38.805947] do_mmap+0x854/0xf00 [ 38.806189] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.806456] ksys_mmap_pgoff+0x3af/0x500 [ 38.806731] do_syscall_64+0x3f/0x90 [ 38.806990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.807342] [ 38.807459] The buggy address belongs to the object at ffff88800ed37740 [ 38.807459] which belongs to the cache vm_area_struct of size 168 [ 38.808253] The buggy address is located 88 bytes inside of [ 38.808253] freed 168-byte region [ffff88800ed37740, ffff88800ed377e8) [ 38.809016] [ 38.809133] The buggy address belongs to the physical page: [ 38.809495] page:000000007802a82d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed37 [ 38.810084] memcg:ffff8880097b0c01 [ 38.810329] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.810681] page_type: 0xffffffff() [ 38.810926] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.811433] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097b0c01 [ 38.811949] page dumped because: kasan: bad access detected [ 38.812328] [ 38.812448] Memory state around the buggy address: [ 38.812779] ffff88800ed37680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.813273] ffff88800ed37700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.813766] >ffff88800ed37780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.814261] ^ [ 38.814543] ffff88800ed37800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.815028] ffff88800ed37880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.815516] ================================================================== [ 38.816072] Disabling lock debugging due to kernel taint [ 41.319703] BUG: Bad rss-counter state mm:00000000be7b6253 type:MM_FILEPAGES val:33 [ 41.320952] BUG: Bad rss-counter state mm:00000000be7b6253 type:MM_ANONPAGES val:22 [ 41.853770] BUG: Bad rss-counter state mm:0000000077796f65 type:MM_FILEPAGES val:33 [ 41.854867] BUG: Bad rss-counter state mm:0000000077796f65 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15453' (ECDSA) to the list of known hosts. 2023/06/20 17:07:22 fuzzer started 2023/06/20 17:07:22 dialing manager at localhost:36067 2023/06/20 17:07:22 checking machine... 2023/06/20 17:07:22 checking revisions... [ 42.570769] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:07:22 testing simple program... [ 42.622934] cgroup: Unknown subsys name 'net' [ 42.682545] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:07:21 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffe1db77cb8 CR3=00000000197bc000 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=2031323a37303a3731203032206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a37303a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba7a6b RBX=fffffbfff0ba7a6b RCX=ffffffff815343f6 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff888019487b38 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800844f780 R13=0000000000000000 R14=0000000000000246 R15=ffff88806cf3de00 RIP=ffffffff8180f184 RFL=00000046 [---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 00007f100c1be900 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=00007f100c775618 CR3=000000000ed6c000 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=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