syzkaller login: [ 50.808591] BUG: Bad rss-counter state mm:000000004ccee1d3 type:MM_FILEPAGES val:33 [ 50.809912] BUG: Bad rss-counter state mm:000000004ccee1d3 type:MM_ANONPAGES val:22 [ 50.969979] ================================================================== [ 50.971091] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.972297] Read of size 8 at addr ffff88800ea42c20 by task sshd/222 [ 50.973221] [ 50.973496] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.974548] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.975710] Call Trace: [ 50.976088] [ 50.976433] dump_stack_lvl+0x91/0xf0 [ 50.977018] print_report+0xcc/0x620 [ 50.977613] ? __virt_addr_valid+0x102/0x340 [ 50.978275] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.979041] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.979812] kasan_report+0xbe/0xf0 [ 50.980400] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.981163] vma_interval_tree_remove+0xc75/0xec0 [ 50.981934] vma_prepare+0xc54/0x11a0 [ 50.982523] __split_vma+0x5af/0x950 [ 50.982992] ? __pfx___split_vma+0x10/0x10 [ 50.983521] ? find_held_lock+0x2c/0x110 [ 50.984038] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.984603] ? lock_is_held_type+0x9f/0x120 [ 50.985135] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.985752] ? mtree_range_walk+0x632/0x900 [ 50.986299] ? mas_walk+0x5c7/0x7c0 [ 50.986779] do_vmi_munmap+0x1f1/0x2b0 [ 50.987269] mmap_region+0x1f9/0x2660 [ 50.987748] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.988255] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.988967] ? __pfx_lock_acquire+0x10/0x10 [ 50.989504] ? __pfx_mmap_region+0x10/0x10 [ 50.990034] ? security_mmap_addr+0x7d/0xa0 [ 50.990561] ? get_unmapped_area+0x1f5/0x3f0 [ 50.991109] do_mmap+0x854/0xf00 [ 50.991546] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.992042] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.992603] ksys_mmap_pgoff+0x3af/0x500 [ 50.993115] do_syscall_64+0x3f/0x90 [ 50.993611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.994254] RIP: 0033:0x7ff15dcf4d82 [ 50.994710] 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 [ 50.996822] RSP: 002b:00007ffc5a532918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.997738] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff15dcf4d82 [ 50.998584] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff15d12e000 [ 50.999425] RBP: 00007ff15d12e000 R08: 0000000000000009 R09: 0000000000001000 [ 51.000265] R10: 0000000000000812 R11: 0000000000000206 R12: 000056497791cb20 [ 51.001105] R13: 00007ffc5a532930 R14: 00007ffc5a532960 R15: 00007ffc5a532cc0 [ 51.001990] [ 51.002291] [ 51.002509] Allocated by task 215: [ 51.002950] kasan_save_stack+0x22/0x50 [ 51.003473] kasan_set_track+0x25/0x30 [ 51.003981] __kasan_slab_alloc+0x59/0x70 [ 51.004518] kmem_cache_alloc+0x16b/0x370 [ 51.005050] vm_area_dup+0x20/0x160 [ 51.005520] __split_vma+0x170/0x950 [ 51.006006] split_vma+0xc6/0x110 [ 51.006446] mprotect_fixup+0x8d2/0xb30 [ 51.006962] do_mprotect_pkey+0x87e/0xd40 [ 51.007492] __x64_sys_mprotect+0x78/0xc0 [ 51.008020] do_syscall_64+0x3f/0x90 [ 51.008508] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.009157] [ 51.009375] Freed by task 215: [ 51.009803] kasan_save_stack+0x22/0x50 [ 51.010321] kasan_set_track+0x25/0x30 [ 51.010828] kasan_save_free_info+0x2b/0x50 [ 51.011371] __kasan_slab_free+0x10a/0x190 [ 51.011922] kmem_cache_free+0x10d/0x4d0 [ 51.012440] rcu_core+0x8c8/0x2860 [ 51.012882] __do_softirq+0x1b7/0x7d4 [ 51.013368] [ 51.013595] Last potentially related work creation: [ 51.014188] kasan_save_stack+0x22/0x50 [ 51.014693] __kasan_record_aux_stack+0x8e/0xa0 [ 51.015269] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.015923] remove_vma+0x139/0x170 [ 51.016373] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.016937] do_vmi_munmap+0x1f1/0x2b0 [ 51.017430] __vm_munmap+0x138/0x3a0 [ 51.017929] __x64_sys_munmap+0x59/0x80 [ 51.018427] do_syscall_64+0x3f/0x90 [ 51.018901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.019563] [ 51.019788] The buggy address belongs to the object at ffff88800ea42bc8 [ 51.019788] which belongs to the cache vm_area_struct of size 168 [ 51.021276] The buggy address is located 88 bytes inside of [ 51.021276] freed 168-byte region [ffff88800ea42bc8, ffff88800ea42c70) [ 51.022710] [ 51.022933] The buggy address belongs to the physical page: [ 51.023608] page:00000000105deb1c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea42 [ 51.024724] memcg:ffff88800deb5601 [ 51.025154] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.025818] page_type: 0xffffffff() [ 51.026279] raw: 0100000000000200 ffff88800879fc80 ffffea00003548c0 dead000000000002 [ 51.027217] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800deb5601 [ 51.028125] page dumped because: kasan: bad access detected [ 51.028802] [ 51.029020] Memory state around the buggy address: [ 51.029637] ffff88800ea42b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.030516] ffff88800ea42b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 51.031398] >ffff88800ea42c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 51.032261] ^ [ 51.032791] ffff88800ea42c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 51.033657] ffff88800ea42d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 51.034523] ================================================================== [ 51.035787] Disabling lock debugging due to kernel taint [ 52.656311] BUG: Bad rss-counter state mm:000000005d4a5e1c type:MM_FILEPAGES val:33 [ 52.657525] BUG: Bad rss-counter state mm:000000005d4a5e1c type:MM_ANONPAGES val:22 [ 53.193395] BUG: Bad rss-counter state mm:00000000671a7f0c type:MM_FILEPAGES val:33 [ 53.194533] BUG: Bad rss-counter state mm:00000000671a7f0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57206' (ECDSA) to the list of known hosts. 2023/06/20 05:42:30 fuzzer started 2023/06/20 05:42:30 dialing manager at localhost:44161 2023/06/20 05:42:30 checking machine... 2023/06/20 05:42:30 checking revisions... [ 53.830756] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:42:30 testing simple program... [ 53.884569] cgroup: Unknown subsys name 'net' [ 53.933802] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:42:10 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=000000000000000c RCX=000000000000000c RDX=ffffed1002d47fc8 RSI=00007fff2b6fb528 RDI=ffff888016a3fe30 RBP=00007fff2b6fb534 RSP=ffff888016a3fd88 R8 =0000000000000001 R9 =ffffed1002d47fc7 R10=ffff888016a3fe3b R11=0000000000000000 R12=00007fff2b6fb528 R13=ffff888016a3fe30 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff844fb7d8 RFL=00040287 [--S--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 00007fa2fcbec900 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=00007fff2b6f8000 CR3=000000001682a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=00007f6e592d88e0 CR3=000000000d04c000 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=2039323a32343a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a32343a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000