syzkaller login: [ 32.797175] BUG: Bad rss-counter state mm:0000000078092589 type:MM_FILEPAGES val:33 [ 32.798141] BUG: Bad rss-counter state mm:0000000078092589 type:MM_ANONPAGES val:22 [ 32.967033] ================================================================== [ 32.968138] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.969263] Read of size 8 at addr ffff88801a415b38 by task sshd/220 [ 32.970220] [ 32.970438] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.971306] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.972280] Call Trace: [ 32.972599] [ 32.972882] dump_stack_lvl+0x91/0xf0 [ 32.973371] print_report+0xcc/0x620 [ 32.973847] ? __virt_addr_valid+0x102/0x340 [ 32.974402] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.975028] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.975644] kasan_report+0xbe/0xf0 [ 32.976122] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.976745] vma_interval_tree_remove+0xc75/0xec0 [ 32.977354] vma_prepare+0xc54/0x11a0 [ 32.977829] __split_vma+0x5af/0x950 [ 32.978300] ? __pfx___split_vma+0x10/0x10 [ 32.978847] ? find_held_lock+0x2c/0x110 [ 32.979373] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.979931] ? lock_is_held_type+0x9f/0x120 [ 32.980471] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.981077] ? mtree_range_walk+0x632/0x900 [ 32.981635] ? mas_walk+0x5c7/0x7c0 [ 32.982111] do_vmi_munmap+0x1f1/0x2b0 [ 32.982619] mmap_region+0x1f9/0x2660 [ 32.983105] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.983617] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.984343] ? __pfx_lock_acquire+0x10/0x10 [ 32.984878] ? __pfx_mmap_region+0x10/0x10 [ 32.985418] ? security_mmap_addr+0x7d/0xa0 [ 32.985951] ? get_unmapped_area+0x1f5/0x3f0 [ 32.986499] do_mmap+0x854/0xf00 [ 32.986960] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.987454] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.988015] ksys_mmap_pgoff+0x3af/0x500 [ 32.988520] do_syscall_64+0x3f/0x90 [ 32.988993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.989642] RIP: 0033:0x7fbc04799d82 [ 32.990113] 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 [ 32.992242] RSP: 002b:00007ffca29ea588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.993143] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbc04799d82 [ 32.993998] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbc03bd3000 [ 32.994858] RBP: 00007fbc03bd3000 R08: 0000000000000009 R09: 0000000000001000 [ 32.995694] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d114695ec0 [ 32.996529] R13: 00007ffca29ea5a0 R14: 00007ffca29ea5d0 R15: 00007ffca29ea930 [ 32.997380] [ 32.997670] [ 32.997887] Allocated by task 213: [ 32.998313] kasan_save_stack+0x22/0x50 [ 32.998833] kasan_set_track+0x25/0x30 [ 32.999322] __kasan_slab_alloc+0x59/0x70 [ 32.999852] kmem_cache_alloc+0x16b/0x370 [ 33.000369] vm_area_dup+0x20/0x160 [ 33.000837] __split_vma+0x170/0x950 [ 33.001304] split_vma+0xc6/0x110 [ 33.001744] mprotect_fixup+0x8d2/0xb30 [ 33.002245] do_mprotect_pkey+0x87e/0xd40 [ 33.002774] __x64_sys_mprotect+0x78/0xc0 [ 33.003295] do_syscall_64+0x3f/0x90 [ 33.003766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.004407] [ 33.004622] Freed by task 203: [ 33.005019] kasan_save_stack+0x22/0x50 [ 33.005540] kasan_set_track+0x25/0x30 [ 33.006035] kasan_save_free_info+0x2b/0x50 [ 33.006578] __kasan_slab_free+0x10a/0x190 [ 33.007105] kmem_cache_free+0x10d/0x4d0 [ 33.007615] rcu_core+0x8c8/0x2860 [ 33.008059] __do_softirq+0x1b7/0x7d4 [ 33.008533] [ 33.008745] Last potentially related work creation: [ 33.009342] kasan_save_stack+0x22/0x50 [ 33.009849] __kasan_record_aux_stack+0x8e/0xa0 [ 33.010422] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.011080] remove_vma+0x139/0x170 [ 33.011528] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.012080] do_vmi_munmap+0x1f1/0x2b0 [ 33.012568] __vm_munmap+0x138/0x3a0 [ 33.013035] __x64_sys_munmap+0x59/0x80 [ 33.013536] do_syscall_64+0x3f/0x90 [ 33.014011] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.014667] [ 33.014885] The buggy address belongs to the object at ffff88801a415ae0 [ 33.014885] which belongs to the cache vm_area_struct of size 168 [ 33.016348] The buggy address is located 88 bytes inside of [ 33.016348] freed 168-byte region [ffff88801a415ae0, ffff88801a415b88) [ 33.017741] [ 33.017956] The buggy address belongs to the physical page: [ 33.018631] page:00000000983cd1d5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a415 [ 33.019726] memcg:ffff88800f247f01 [ 33.020153] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.020816] page_type: 0xffffffff() [ 33.021287] raw: 0100000000000200 ffff88800879fc80 ffffea000061f780 dead000000000002 [ 33.022214] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f247f01 [ 33.023137] page dumped because: kasan: bad access detected [ 33.023804] [ 33.024020] Memory state around the buggy address: [ 33.024595] ffff88801a415a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.025452] ffff88801a415a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 33.026319] >ffff88801a415b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.027191] ^ [ 33.027799] ffff88801a415b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 33.028658] ffff88801a415c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 33.029508] ================================================================== [ 33.030488] Disabling lock debugging due to kernel taint [ 34.852546] BUG: Bad rss-counter state mm:00000000ab81a19c type:MM_FILEPAGES val:33 [ 34.853943] BUG: Bad rss-counter state mm:00000000ab81a19c type:MM_ANONPAGES val:22 [ 35.321797] BUG: Bad rss-counter state mm:000000002351f449 type:MM_FILEPAGES val:33 [ 35.322984] BUG: Bad rss-counter state mm:000000002351f449 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16610' (ECDSA) to the list of known hosts. 2023/06/19 22:27:50 fuzzer started 2023/06/19 22:27:50 dialing manager at localhost:44161 2023/06/19 22:27:50 checking machine... 2023/06/19 22:27:50 checking revisions... [ 35.951287] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:27:50 testing simple program... [ 36.002695] cgroup: Unknown subsys name 'net' [ 36.065177] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:27:47 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=0000000000000001 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=00007f1adf5f4e90 CR3=000000000e91e000 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=2039343a37323a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a37323a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=1ffff11003942e85 RCX=ffffffff812d8ec3 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88801ca17408 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=000009ee000009ee R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180efb5 RFL=00000246 [---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 00007f8f008a2900 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=00007ffe6176c000 CR3=0000000015ec8000 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=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