syzkaller login: [ 61.403919] BUG: Bad rss-counter state mm:00000000cda61c13 type:MM_FILEPAGES val:33 [ 61.405104] BUG: Bad rss-counter state mm:00000000cda61c13 type:MM_ANONPAGES val:22 [ 61.516700] ================================================================== [ 61.517796] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.518764] Read of size 8 at addr ffff88800dfd9c20 by task sshd/221 [ 61.519693] [ 61.519932] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.520789] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.521813] Call Trace: [ 61.522145] [ 61.522428] dump_stack_lvl+0x91/0xf0 [ 61.522937] print_report+0xcc/0x620 [ 61.523419] ? __virt_addr_valid+0x102/0x340 [ 61.523987] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.524609] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.525256] kasan_report+0xbe/0xf0 [ 61.525758] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.526390] vma_interval_tree_remove+0xc75/0xec0 [ 61.527009] vma_prepare+0xc54/0x11a0 [ 61.527491] __split_vma+0x5af/0x950 [ 61.527979] ? __pfx___split_vma+0x10/0x10 [ 61.528507] ? find_held_lock+0x2c/0x110 [ 61.529046] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.529626] ? lock_is_held_type+0x9f/0x120 [ 61.530184] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.530793] ? mtree_range_walk+0x632/0x900 [ 61.531374] ? mas_walk+0x5c7/0x7c0 [ 61.531859] do_vmi_munmap+0x1f1/0x2b0 [ 61.532355] mmap_region+0x1f9/0x2660 [ 61.532856] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.533381] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.534123] ? __pfx_lock_acquire+0x10/0x10 [ 61.534661] ? __pfx_mmap_region+0x10/0x10 [ 61.535202] ? security_mmap_addr+0x7d/0xa0 [ 61.535740] ? get_unmapped_area+0x1f5/0x3f0 [ 61.536298] do_mmap+0x854/0xf00 [ 61.536733] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.537238] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.537829] ksys_mmap_pgoff+0x3af/0x500 [ 61.538345] do_syscall_64+0x3f/0x90 [ 61.538832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.539489] RIP: 0033:0x7fae20919d82 [ 61.539968] 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 [ 61.542120] RSP: 002b:00007ffe1e4494c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.543034] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fae20919d82 [ 61.543886] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fae1fd53000 [ 61.544720] RBP: 00007fae1fd53000 R08: 0000000000000009 R09: 0000000000001000 [ 61.545594] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556090b88ec0 [ 61.546455] R13: 00007ffe1e4494e0 R14: 00007ffe1e449510 R15: 00007ffe1e449870 [ 61.547321] [ 61.547613] [ 61.547850] Allocated by task 214: [ 61.548283] kasan_save_stack+0x22/0x50 [ 61.548791] kasan_set_track+0x25/0x30 [ 61.549303] __kasan_slab_alloc+0x59/0x70 [ 61.549865] kmem_cache_alloc+0x16b/0x370 [ 61.550392] vm_area_dup+0x20/0x160 [ 61.550864] __split_vma+0x170/0x950 [ 61.551338] split_vma+0xc6/0x110 [ 61.551778] mprotect_fixup+0x8d2/0xb30 [ 61.552294] do_mprotect_pkey+0x87e/0xd40 [ 61.552816] __x64_sys_mprotect+0x78/0xc0 [ 61.553349] do_syscall_64+0x3f/0x90 [ 61.553847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.554500] [ 61.554716] Freed by task 214: [ 61.555124] kasan_save_stack+0x22/0x50 [ 61.555623] kasan_set_track+0x25/0x30 [ 61.556129] kasan_save_free_info+0x2b/0x50 [ 61.556662] __kasan_slab_free+0x10a/0x190 [ 61.557204] kmem_cache_free+0x10d/0x4d0 [ 61.557723] rcu_core+0x8c8/0x2860 [ 61.558184] __do_softirq+0x1b7/0x7d4 [ 61.558662] [ 61.558896] Last potentially related work creation: [ 61.559476] kasan_save_stack+0x22/0x50 [ 61.559986] __kasan_record_aux_stack+0x8e/0xa0 [ 61.560555] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.561205] remove_vma+0x139/0x170 [ 61.561675] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.562250] do_vmi_munmap+0x1f1/0x2b0 [ 61.562737] __vm_munmap+0x138/0x3a0 [ 61.563213] __x64_sys_munmap+0x59/0x80 [ 61.563708] do_syscall_64+0x3f/0x90 [ 61.564186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.564835] [ 61.565063] Second to last potentially related work creation: [ 61.565754] kasan_save_stack+0x22/0x50 [ 61.566272] __kasan_record_aux_stack+0x8e/0xa0 [ 61.566857] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.567498] remove_vma+0x139/0x170 [ 61.567967] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.568524] do_vmi_munmap+0x1f1/0x2b0 [ 61.569022] mmap_region+0x1f9/0x2660 [ 61.569518] do_mmap+0x854/0xf00 [ 61.569962] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.570445] ksys_mmap_pgoff+0x3af/0x500 [ 61.570958] do_syscall_64+0x3f/0x90 [ 61.571429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.572077] [ 61.572293] The buggy address belongs to the object at ffff88800dfd9bc8 [ 61.572293] which belongs to the cache vm_area_struct of size 168 [ 61.573781] The buggy address is located 88 bytes inside of [ 61.573781] freed 168-byte region [ffff88800dfd9bc8, ffff88800dfd9c70) [ 61.575193] [ 61.575412] The buggy address belongs to the physical page: [ 61.576080] page:00000000089dd76c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfd9 [ 61.577175] memcg:ffff88800e50e901 [ 61.577607] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.578323] page_type: 0xffffffff() [ 61.578774] raw: 0100000000000200 ffff88800879fc80 ffffea000039ce80 dead000000000007 [ 61.579705] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e50e901 [ 61.580623] page dumped because: kasan: bad access detected [ 61.581289] [ 61.581527] Memory state around the buggy address: [ 61.582120] ffff88800dfd9b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.582984] ffff88800dfd9b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 61.583853] >ffff88800dfd9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 61.584699] ^ [ 61.585232] ffff88800dfd9c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 61.586127] ffff88800dfd9d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 61.587002] ================================================================== [ 61.587980] Disabling lock debugging due to kernel taint [ 63.524898] BUG: Bad rss-counter state mm:00000000962ebf95 type:MM_FILEPAGES val:33 [ 63.526114] BUG: Bad rss-counter state mm:00000000962ebf95 type:MM_ANONPAGES val:22 [ 64.082888] BUG: Bad rss-counter state mm:00000000063eb854 type:MM_FILEPAGES val:33 [ 64.084098] BUG: Bad rss-counter state mm:00000000063eb854 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47526' (ECDSA) to the list of known hosts. 2023/06/19 12:07:13 fuzzer started 2023/06/19 12:07:13 dialing manager at localhost:44161 2023/06/19 12:07:13 checking machine... 2023/06/19 12:07:13 checking revisions... [ 64.713861] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:07:13 testing simple program... [ 64.763313] cgroup: Unknown subsys name 'net' [ 64.804875] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:07:12 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffca1e972a8 CR3=0000000005482000 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=00007f04e26555100000555d64493790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800f390001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800f38f901 RSI=ffff88800f38f978 RDI=ffff88800f38f978 RBP=ffff88800f38f930 RSP=ffff88800f38f810 R8 =ffffffff86088c1e R9 =ffff88800f38f918 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800f38f938 R13=ffff88800f38f920 R14=ffff88800f38f980 R15=ffff88800f38f8d8 RIP=ffffffff8112fbf0 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 00007f118e4ff900 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=00007fff6ad08000 CR3=00000000098cc000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000