syzkaller login: [ 28.770468] sshd (213) used greatest stack depth: 24128 bytes left [ 28.771408] BUG: Bad rss-counter state mm:0000000001df682a type:MM_FILEPAGES val:33 [ 28.772677] BUG: Bad rss-counter state mm:0000000001df682a type:MM_ANONPAGES val:22 [ 28.940022] ================================================================== [ 28.941115] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.942342] Read of size 8 at addr ffff888016d22ed8 by task sshd/221 [ 28.943285] [ 28.943544] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.944640] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.945756] Call Trace: [ 28.946063] [ 28.946336] dump_stack_lvl+0x91/0xf0 [ 28.946803] print_report+0xcc/0x620 [ 28.947263] ? __virt_addr_valid+0x102/0x340 [ 28.947779] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.948378] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.948958] kasan_report+0xbe/0xf0 [ 28.949414] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.950003] vma_interval_tree_remove+0xc75/0xec0 [ 28.950574] vma_prepare+0xc54/0x11a0 [ 28.951035] __split_vma+0x5af/0x950 [ 28.951480] ? __pfx___split_vma+0x10/0x10 [ 28.951979] ? find_held_lock+0x2c/0x110 [ 28.952489] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.953022] ? lock_is_held_type+0x9f/0x120 [ 28.953536] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.954114] ? mtree_range_walk+0x632/0x900 [ 28.954670] ? mas_walk+0x5c7/0x7c0 [ 28.955154] do_vmi_munmap+0x1f1/0x2b0 [ 28.955642] mmap_region+0x1f9/0x2660 [ 28.956152] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.956672] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.957388] ? __pfx_lock_acquire+0x10/0x10 [ 28.957933] ? __pfx_mmap_region+0x10/0x10 [ 28.958468] ? security_mmap_addr+0x7d/0xa0 [ 28.958998] ? get_unmapped_area+0x1f5/0x3f0 [ 28.959546] do_mmap+0x854/0xf00 [ 28.959991] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.960497] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.961069] ksys_mmap_pgoff+0x3af/0x500 [ 28.961587] do_syscall_64+0x3f/0x90 [ 28.962072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.962721] RIP: 0033:0x7fb139172d82 [ 28.963177] 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 [ 28.965362] RSP: 002b:00007ffd819b41a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.966259] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb139172d82 [ 28.967121] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb1385ac000 [ 28.967986] RBP: 00007fb1385ac000 R08: 0000000000000009 R09: 0000000000001000 [ 28.968845] R10: 0000000000000812 R11: 0000000000000206 R12: 000056132f4cdec0 [ 28.969704] R13: 00007ffd819b41c0 R14: 00007ffd819b41f0 R15: 00007ffd819b4550 [ 28.970578] [ 28.970871] [ 28.971089] Allocated by task 213: [ 28.971532] kasan_save_stack+0x22/0x50 [ 28.972041] kasan_set_track+0x25/0x30 [ 28.972537] __kasan_slab_alloc+0x59/0x70 [ 28.973066] kmem_cache_alloc+0x16b/0x370 [ 28.973584] vm_area_dup+0x20/0x160 [ 28.974041] __split_vma+0x170/0x950 [ 28.974508] split_vma+0xc6/0x110 [ 28.974946] mprotect_fixup+0x8d2/0xb30 [ 28.975456] do_mprotect_pkey+0x87e/0xd40 [ 28.975968] __x64_sys_mprotect+0x78/0xc0 [ 28.976515] do_syscall_64+0x3f/0x90 [ 28.976997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.977641] [ 28.977853] Freed by task 13: [ 28.978236] kasan_save_stack+0x22/0x50 [ 28.978746] kasan_set_track+0x25/0x30 [ 28.979234] kasan_save_free_info+0x2b/0x50 [ 28.979761] __kasan_slab_free+0x10a/0x190 [ 28.980305] kmem_cache_free+0x10d/0x4d0 [ 28.980819] rcu_core+0x8c8/0x2860 [ 28.981270] __do_softirq+0x1b7/0x7d4 [ 28.981726] [ 28.981929] Last potentially related work creation: [ 28.982475] kasan_save_stack+0x22/0x50 [ 28.982949] __kasan_record_aux_stack+0x8e/0xa0 [ 28.983490] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.984114] remove_vma+0x139/0x170 [ 28.984540] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.985074] do_vmi_munmap+0x1f1/0x2b0 [ 28.985527] __vm_munmap+0x138/0x3a0 [ 28.985968] __x64_sys_munmap+0x59/0x80 [ 28.986435] do_syscall_64+0x3f/0x90 [ 28.986883] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.987487] [ 28.987693] Second to last potentially related work creation: [ 28.988338] kasan_save_stack+0x22/0x50 [ 28.988808] __kasan_record_aux_stack+0x8e/0xa0 [ 28.989366] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.989981] remove_vma+0x139/0x170 [ 28.990427] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.990966] do_vmi_munmap+0x1f1/0x2b0 [ 28.991444] mmap_region+0x1f9/0x2660 [ 28.991898] do_mmap+0x854/0xf00 [ 28.992316] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.992776] ksys_mmap_pgoff+0x3af/0x500 [ 28.993243] do_syscall_64+0x3f/0x90 [ 28.993693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.994293] [ 28.994502] The buggy address belongs to the object at ffff888016d22e80 [ 28.994502] which belongs to the cache vm_area_struct of size 168 [ 28.995872] The buggy address is located 88 bytes inside of [ 28.995872] freed 168-byte region [ffff888016d22e80, ffff888016d22f28) [ 28.997203] [ 28.997411] The buggy address belongs to the physical page: [ 28.998029] page:00000000a48fbb78 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d22 [ 28.999057] memcg:ffff888013b24b01 [ 28.999463] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.000124] page_type: 0xffffffff() [ 29.000550] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 29.001408] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013b24b01 [ 29.002253] page dumped because: kasan: bad access detected [ 29.002872] [ 29.003078] Memory state around the buggy address: [ 29.003630] ffff888016d22d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.004442] ffff888016d22e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 29.005239] >ffff888016d22e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.006028] ^ [ 29.006711] ffff888016d22f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 29.007510] ffff888016d22f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.008323] ================================================================== [ 29.009351] Disabling lock debugging due to kernel taint [ 31.032627] BUG: Bad rss-counter state mm:0000000075a4c721 type:MM_FILEPAGES val:33 [ 31.033797] BUG: Bad rss-counter state mm:0000000075a4c721 type:MM_ANONPAGES val:22 [ 31.515476] BUG: Bad rss-counter state mm:000000009c077e07 type:MM_FILEPAGES val:33 [ 31.516220] BUG: Bad rss-counter state mm:000000009c077e07 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11359' (ECDSA) to the list of known hosts. 2023/06/21 05:12:33 fuzzer started 2023/06/21 05:12:33 dialing manager at localhost:36067 2023/06/21 05:12:33 checking machine... 2023/06/21 05:12:33 checking revisions... [ 32.143721] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:12:34 testing simple program... [ 32.184846] cgroup: Unknown subsys name 'net' [ 32.240060] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:12:33 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=00007f4602b42890 CR3=000000000e834000 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=2033333a32313a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a32313a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888014147528 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff888014147528 RBP=ffff888014147528 RSP=ffff888019d8fb80 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000246 R13=0000000000000000 R14=0000000000000001 R15=ffff888014147000 RIP=ffffffff812e0020 RFL=00000082 [--S----] 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 00007f40b54f9900 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=00007ffc8658b000 CR3=000000001a2f0000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000