syzkaller login: [ 31.565232] BUG: Bad rss-counter state mm:00000000f2a7abd4 type:MM_FILEPAGES val:33 [ 31.566476] BUG: Bad rss-counter state mm:00000000f2a7abd4 type:MM_ANONPAGES val:22 [ 31.727940] ================================================================== [ 31.728858] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.729813] Read of size 8 at addr ffff88801a8b7d08 by task sshd/221 [ 31.730702] [ 31.730919] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.731814] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.732810] Call Trace: [ 31.733135] [ 31.733426] dump_stack_lvl+0x91/0xf0 [ 31.733935] print_report+0xcc/0x620 [ 31.734434] ? __virt_addr_valid+0x102/0x340 [ 31.734984] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.735618] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.736248] kasan_report+0xbe/0xf0 [ 31.736728] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.737360] vma_interval_tree_remove+0xc75/0xec0 [ 31.737968] vma_prepare+0xc54/0x11a0 [ 31.738481] __split_vma+0x5af/0x950 [ 31.738956] ? __pfx___split_vma+0x10/0x10 [ 31.739488] ? find_held_lock+0x2c/0x110 [ 31.740021] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.740587] ? lock_is_held_type+0x9f/0x120 [ 31.741125] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.741735] ? mtree_range_walk+0x632/0x900 [ 31.742315] ? mas_walk+0x5c7/0x7c0 [ 31.742797] do_vmi_munmap+0x1f1/0x2b0 [ 31.743292] mmap_region+0x1f9/0x2660 [ 31.743775] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.744286] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.745011] ? __pfx_lock_acquire+0x10/0x10 [ 31.745546] ? __pfx_mmap_region+0x10/0x10 [ 31.746077] ? security_mmap_addr+0x7d/0xa0 [ 31.746623] ? get_unmapped_area+0x1f5/0x3f0 [ 31.747176] do_mmap+0x854/0xf00 [ 31.747621] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.748123] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.748691] ksys_mmap_pgoff+0x3af/0x500 [ 31.749200] do_syscall_64+0x3f/0x90 [ 31.749684] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.750356] RIP: 0033:0x7f931330dd82 [ 31.750818] 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 [ 31.752952] RSP: 002b:00007ffd0e8374b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.753860] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f931330dd82 [ 31.754710] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9312747000 [ 31.755559] RBP: 00007f9312747000 R08: 0000000000000009 R09: 0000000000001000 [ 31.756400] R10: 0000000000000812 R11: 0000000000000206 R12: 00005617db5b4b20 [ 31.757249] R13: 00007ffd0e8374d0 R14: 00007ffd0e837500 R15: 00007ffd0e837860 [ 31.758114] [ 31.758428] [ 31.758646] Allocated by task 214: [ 31.759075] kasan_save_stack+0x22/0x50 [ 31.759578] kasan_set_track+0x25/0x30 [ 31.760074] __kasan_slab_alloc+0x59/0x70 [ 31.760597] kmem_cache_alloc+0x16b/0x370 [ 31.761108] vm_area_dup+0x20/0x160 [ 31.761561] __split_vma+0x170/0x950 [ 31.762029] split_vma+0xc6/0x110 [ 31.762476] mprotect_fixup+0x8d2/0xb30 [ 31.762981] do_mprotect_pkey+0x87e/0xd40 [ 31.763506] __x64_sys_mprotect+0x78/0xc0 [ 31.764029] do_syscall_64+0x3f/0x90 [ 31.764503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.765150] [ 31.765364] Freed by task 214: [ 31.765762] kasan_save_stack+0x22/0x50 [ 31.766261] kasan_set_track+0x25/0x30 [ 31.766772] kasan_save_free_info+0x2b/0x50 [ 31.767307] __kasan_slab_free+0x10a/0x190 [ 31.767847] kmem_cache_free+0x10d/0x4d0 [ 31.768365] rcu_core+0x8c8/0x2860 [ 31.768811] __do_softirq+0x1b7/0x7d4 [ 31.769288] [ 31.769500] Last potentially related work creation: [ 31.770095] kasan_save_stack+0x22/0x50 [ 31.770607] __kasan_record_aux_stack+0x8e/0xa0 [ 31.771189] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.771837] remove_vma+0x139/0x170 [ 31.772287] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.772848] do_vmi_munmap+0x1f1/0x2b0 [ 31.773335] __vm_munmap+0x138/0x3a0 [ 31.773805] __x64_sys_munmap+0x59/0x80 [ 31.774309] do_syscall_64+0x3f/0x90 [ 31.774781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.775426] [ 31.775639] The buggy address belongs to the object at ffff88801a8b7cb0 [ 31.775639] which belongs to the cache vm_area_struct of size 168 [ 31.777089] The buggy address is located 88 bytes inside of [ 31.777089] freed 168-byte region [ffff88801a8b7cb0, ffff88801a8b7d58) [ 31.778461] [ 31.778678] The buggy address belongs to the physical page: [ 31.779320] page:0000000025324b0e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a8b7 [ 31.780395] memcg:ffff888017fe7701 [ 31.780823] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.781450] page_type: 0xffffffff() [ 31.781893] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.782786] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017fe7701 [ 31.783679] page dumped because: kasan: bad access detected [ 31.784323] [ 31.784539] Memory state around the buggy address: [ 31.785109] ffff88801a8b7c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.785949] ffff88801a8b7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.786790] >ffff88801a8b7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.787611] ^ [ 31.788035] ffff88801a8b7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.788865] ffff88801a8b7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.789711] ================================================================== [ 31.790693] Disabling lock debugging due to kernel taint [ 33.749444] BUG: Bad rss-counter state mm:000000006cf252dc type:MM_FILEPAGES val:33 [ 33.750576] BUG: Bad rss-counter state mm:000000006cf252dc type:MM_ANONPAGES val:22 [ 34.348668] BUG: Bad rss-counter state mm:00000000a2f421ee type:MM_FILEPAGES val:33 [ 34.349840] BUG: Bad rss-counter state mm:00000000a2f421ee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42135' (ECDSA) to the list of known hosts. 2023/06/20 14:28:44 fuzzer started 2023/06/20 14:28:44 dialing manager at localhost:36067 2023/06/20 14:28:44 checking machine... 2023/06/20 14:28:44 checking revisions... [ 35.019388] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:28:44 testing simple program... [ 35.071140] cgroup: Unknown subsys name 'net' [ 35.130210] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:28:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814c856d RDX=ffff888019679b40 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff888019607800 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=0000000000092cc0 RIP=ffffffff814c0408 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 00007f9e88df3900 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=00007ffc696d3000 CR3=000000000961a000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f320de44d60 CR3=000000000e230000 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=2033343a38323a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a38323a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000