syzkaller login: [ 33.329548] BUG: Bad rss-counter state mm:00000000b7e4d8e4 type:MM_FILEPAGES val:33 [ 33.330559] BUG: Bad rss-counter state mm:00000000b7e4d8e4 type:MM_ANONPAGES val:22 [ 33.492198] ================================================================== [ 33.493272] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.494375] Read of size 8 at addr ffff888016a24310 by task sshd/221 [ 33.495485] [ 33.495759] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.496782] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.498040] Call Trace: [ 33.498428] [ 33.498770] dump_stack_lvl+0x91/0xf0 [ 33.499355] print_report+0xcc/0x620 [ 33.499946] ? __virt_addr_valid+0x102/0x340 [ 33.500595] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.501335] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.502079] kasan_report+0xbe/0xf0 [ 33.502657] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.503412] vma_interval_tree_remove+0xc75/0xec0 [ 33.504149] vma_prepare+0xc54/0x11a0 [ 33.504727] __split_vma+0x5af/0x950 [ 33.505302] ? __pfx___split_vma+0x10/0x10 [ 33.505941] ? find_held_lock+0x2c/0x110 [ 33.506569] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.507252] ? lock_is_held_type+0x9f/0x120 [ 33.507923] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.508607] ? mtree_range_walk+0x632/0x900 [ 33.509168] ? mas_walk+0x5c7/0x7c0 [ 33.509645] do_vmi_munmap+0x1f1/0x2b0 [ 33.510139] mmap_region+0x1f9/0x2660 [ 33.510630] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.511145] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.511882] ? __pfx_lock_acquire+0x10/0x10 [ 33.512427] ? __pfx_mmap_region+0x10/0x10 [ 33.512962] ? security_mmap_addr+0x7d/0xa0 [ 33.513506] ? get_unmapped_area+0x1f5/0x3f0 [ 33.514062] do_mmap+0x854/0xf00 [ 33.514505] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.515001] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.515595] ksys_mmap_pgoff+0x3af/0x500 [ 33.516113] do_syscall_64+0x3f/0x90 [ 33.516600] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.517262] RIP: 0033:0x7f1fad5e2d82 [ 33.517729] 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 [ 33.519908] RSP: 002b:00007ffda9499d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.520822] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1fad5e2d82 [ 33.521680] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1faca1c000 [ 33.522531] RBP: 00007f1faca1c000 R08: 0000000000000009 R09: 0000000000001000 [ 33.523402] R10: 0000000000000812 R11: 0000000000000206 R12: 00005654f1bdfb20 [ 33.524276] R13: 00007ffda9499da0 R14: 00007ffda9499dd0 R15: 00007ffda949a130 [ 33.525148] [ 33.525447] [ 33.525666] Allocated by task 214: [ 33.526093] kasan_save_stack+0x22/0x50 [ 33.526611] kasan_set_track+0x25/0x30 [ 33.527101] __kasan_slab_alloc+0x59/0x70 [ 33.527643] kmem_cache_alloc+0x16b/0x370 [ 33.528162] vm_area_dup+0x20/0x160 [ 33.528622] __split_vma+0x170/0x950 [ 33.529093] split_vma+0xc6/0x110 [ 33.529538] mprotect_fixup+0x8d2/0xb30 [ 33.530052] do_mprotect_pkey+0x87e/0xd40 [ 33.530587] __x64_sys_mprotect+0x78/0xc0 [ 33.531117] do_syscall_64+0x3f/0x90 [ 33.531604] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.532254] [ 33.532475] Freed by task 13: [ 33.532861] kasan_save_stack+0x22/0x50 [ 33.533373] kasan_set_track+0x25/0x30 [ 33.533873] kasan_save_free_info+0x2b/0x50 [ 33.534421] __kasan_slab_free+0x10a/0x190 [ 33.534971] kmem_cache_free+0x10d/0x4d0 [ 33.535484] rcu_core+0x8c8/0x2860 [ 33.536042] __do_softirq+0x1b7/0x7d4 [ 33.536528] [ 33.536744] Last potentially related work creation: [ 33.537325] kasan_save_stack+0x22/0x50 [ 33.537827] __kasan_record_aux_stack+0x8e/0xa0 [ 33.538409] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.539049] remove_vma+0x139/0x170 [ 33.539508] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.540092] do_vmi_munmap+0x1f1/0x2b0 [ 33.540581] __vm_munmap+0x138/0x3a0 [ 33.541052] __x64_sys_munmap+0x59/0x80 [ 33.541561] do_syscall_64+0x3f/0x90 [ 33.542041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.542691] [ 33.542911] The buggy address belongs to the object at ffff888016a242b8 [ 33.542911] which belongs to the cache vm_area_struct of size 168 [ 33.544409] The buggy address is located 88 bytes inside of [ 33.544409] freed 168-byte region [ffff888016a242b8, ffff888016a24360) [ 33.545825] [ 33.546043] The buggy address belongs to the physical page: [ 33.546715] page:0000000012b996ce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a24 [ 33.547839] memcg:ffff88800e125e01 [ 33.548271] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.548921] page_type: 0xffffffff() [ 33.549371] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.550297] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e125e01 [ 33.551214] page dumped because: kasan: bad access detected [ 33.551897] [ 33.552123] Memory state around the buggy address: [ 33.552707] ffff888016a24200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 33.553581] ffff888016a24280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.554445] >ffff888016a24300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.555320] ^ [ 33.555817] ffff888016a24380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.556673] ffff888016a24400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.557519] ================================================================== [ 33.558532] Disabling lock debugging due to kernel taint [ 35.906407] BUG: Bad rss-counter state mm:00000000ce598918 type:MM_FILEPAGES val:33 [ 35.907569] BUG: Bad rss-counter state mm:00000000ce598918 type:MM_ANONPAGES val:22 [ 36.392041] BUG: Bad rss-counter state mm:00000000b2b8679f type:MM_FILEPAGES val:33 [ 36.393025] BUG: Bad rss-counter state mm:00000000b2b8679f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64943' (ECDSA) to the list of known hosts. 2023/06/20 05:41:24 fuzzer started 2023/06/20 05:41:24 dialing manager at localhost:44161 2023/06/20 05:41:24 checking machine... 2023/06/20 05:41:24 checking revisions... [ 37.035114] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:41:24 testing simple program... [ 37.090488] cgroup: Unknown subsys name 'net' [ 37.133678] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:41:20 Registers: info registers vcpu 0 RAX=000055a8413ea360 RBX=000055a8413ea360 RCX=00000000000001ae RDX=0000000000000000 RSI=000055a8413f0240 RDI=000055a8413ea360 RBP=000055a8413ea360 RSP=00007ffc9eaecbe8 R8 =0000000000000024 R9 =00007ffc9ebe4080 R10=00007ffc9ebe40f0 R11=000000000000f99e R12=000055a8413ea620 R13=ffffffffffffffff R14=0000000000000000 R15=0000000000000000 RIP=00007f130ed3c9a3 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f130e1cd900 00000000 00000000 GS =0000 0000000000000000 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=00007f2976eae650 CR3=00000000099c8000 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=964e9b227b1c0282c548feb61274d870 XMM02=000000000011f078d59e07bde36eea69 XMM03=000000000011f1a0ec2efd57dc4c00df XMM04=fc12c0ae1bb4573100000000000ae988 XMM05=a27f4bed7941b8aa00000000001344f0 XMM06=00c3ffa147b8d85700000000001332e0 XMM07=fb795ef6d65770560000000000123868 XMM08=2c67c8bc2e329bc3000000000011f1a0 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=00007ffd3ba24768 CR3=000000000c712000 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=31343a3530203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3133325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363839 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000