syzkaller login: [ 30.916516] BUG: Bad rss-counter state mm:00000000475192ec type:MM_FILEPAGES val:33 [ 30.917907] BUG: Bad rss-counter state mm:00000000475192ec type:MM_ANONPAGES val:22 [ 30.960113] ================================================================== [ 30.961344] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.962413] Read of size 8 at addr ffff888018040c20 by task sshd/220 [ 30.963293] [ 30.963545] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.964513] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.965606] Call Trace: [ 30.965979] [ 30.966313] dump_stack_lvl+0x91/0xf0 [ 30.966871] print_report+0xcc/0x620 [ 30.967432] ? __virt_addr_valid+0x102/0x340 [ 30.968055] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.968750] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.969463] kasan_report+0xbe/0xf0 [ 30.970040] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.970743] vma_interval_tree_remove+0xc75/0xec0 [ 30.971447] vma_prepare+0xc54/0x11a0 [ 30.971990] __split_vma+0x5af/0x950 [ 30.972520] ? __pfx___split_vma+0x10/0x10 [ 30.973120] ? find_held_lock+0x2c/0x110 [ 30.973707] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.974368] ? lock_is_held_type+0x9f/0x120 [ 30.974985] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.975671] ? mtree_range_walk+0x632/0x900 [ 30.976305] ? mas_walk+0x5c7/0x7c0 [ 30.976848] do_vmi_munmap+0x1f1/0x2b0 [ 30.977413] mmap_region+0x1f9/0x2660 [ 30.977968] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.978553] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.979394] ? __pfx_lock_acquire+0x10/0x10 [ 30.980022] ? __pfx_mmap_region+0x10/0x10 [ 30.980641] ? security_mmap_addr+0x7d/0xa0 [ 30.981261] ? get_unmapped_area+0x1f5/0x3f0 [ 30.981917] do_mmap+0x854/0xf00 [ 30.982426] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.983002] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.983660] ksys_mmap_pgoff+0x3af/0x500 [ 30.984252] do_syscall_64+0x3f/0x90 [ 30.984810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.985565] RIP: 0033:0x7f3d5eb12d82 [ 30.986135] 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 [ 30.988596] RSP: 002b:00007ffd86cbb598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.989642] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3d5eb12d82 [ 30.990635] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3d5df4c000 [ 30.991619] RBP: 00007f3d5df4c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.992590] R10: 0000000000000812 R11: 0000000000000206 R12: 00005651c559af60 [ 30.993579] R13: 00007ffd86cbb5b0 R14: 00007ffd86cbb5e0 R15: 00007ffd86cbb940 [ 30.994587] [ 30.994928] [ 30.995178] Allocated by task 213: [ 30.995680] kasan_save_stack+0x22/0x50 [ 30.996269] kasan_set_track+0x25/0x30 [ 30.996843] __kasan_slab_alloc+0x59/0x70 [ 30.997453] kmem_cache_alloc+0x16b/0x370 [ 30.998068] vm_area_dup+0x20/0x160 [ 30.998605] __split_vma+0x170/0x950 [ 30.999150] split_vma+0xc6/0x110 [ 30.999660] mprotect_fixup+0x8d2/0xb30 [ 31.000244] do_mprotect_pkey+0x87e/0xd40 [ 31.000850] __x64_sys_mprotect+0x78/0xc0 [ 31.001456] do_syscall_64+0x3f/0x90 [ 31.002030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.002781] [ 31.003035] Freed by task 19: [ 31.003480] kasan_save_stack+0x22/0x50 [ 31.004070] kasan_set_track+0x25/0x30 [ 31.004644] kasan_save_free_info+0x2b/0x50 [ 31.005264] __kasan_slab_free+0x10a/0x190 [ 31.005888] kmem_cache_free+0x10d/0x4d0 [ 31.006479] rcu_core+0x8c8/0x2860 [ 31.006996] __do_softirq+0x1b7/0x7d4 [ 31.007548] [ 31.007797] Last potentially related work creation: [ 31.008481] kasan_save_stack+0x22/0x50 [ 31.009066] __kasan_record_aux_stack+0x8e/0xa0 [ 31.009759] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.010504] remove_vma+0x139/0x170 [ 31.011037] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.011678] do_vmi_munmap+0x1f1/0x2b0 [ 31.012240] __vm_munmap+0x138/0x3a0 [ 31.012775] __x64_sys_munmap+0x59/0x80 [ 31.013347] do_syscall_64+0x3f/0x90 [ 31.013902] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.014634] [ 31.014882] The buggy address belongs to the object at ffff888018040bc8 [ 31.014882] which belongs to the cache vm_area_struct of size 168 [ 31.016575] The buggy address is located 88 bytes inside of [ 31.016575] freed 168-byte region [ffff888018040bc8, ffff888018040c70) [ 31.018208] [ 31.018459] The buggy address belongs to the physical page: [ 31.019227] page:00000000ac6744af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18040 [ 31.020481] memcg:ffff888016ec3f01 [ 31.020966] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.021708] page_type: 0xffffffff() [ 31.022241] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.023300] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ec3f01 [ 31.024336] page dumped because: kasan: bad access detected [ 31.025093] [ 31.025345] Memory state around the buggy address: [ 31.026020] ffff888018040b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.027003] ffff888018040b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.027976] >ffff888018040c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.028938] ^ [ 31.029551] ffff888018040c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.030541] ffff888018040d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.031511] ================================================================== [ 31.032759] Disabling lock debugging due to kernel taint [ 33.083659] BUG: Bad rss-counter state mm:00000000ecb801d0 type:MM_FILEPAGES val:33 [ 33.085029] BUG: Bad rss-counter state mm:00000000ecb801d0 type:MM_ANONPAGES val:22 [ 33.594996] BUG: Bad rss-counter state mm:000000003d543133 type:MM_FILEPAGES val:33 [ 33.596194] BUG: Bad rss-counter state mm:000000003d543133 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54499' (ECDSA) to the list of known hosts. 2023/06/20 14:48:58 fuzzer started 2023/06/20 14:48:59 dialing manager at localhost:36067 2023/06/20 14:48:59 checking machine... 2023/06/20 14:48:59 checking revisions... [ 34.188844] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:48:59 testing simple program... [ 34.235289] cgroup: Unknown subsys name 'net' [ 34.269489] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:48:58 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=00007f298d0a8e40 CR3=0000000018050000 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=2038353a38343a3431203032206e754a XMM01=6964206465766965636552203a5d3033 XMM02=6f63736964203a31313a303337373420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a38343a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000558d56c76060 RCX=0000000000000008 RDX=0000558d56c76108 RSI=0000000000000003 RDI=0000558d56c76108 RBP=000000000000000d RSP=00007ffc6b9cf990 R8 =00007ffc6b9cfa90 R9 =00007ffc6b9d7080 R10=00007ffc6b9cf936 R11=0000000000000000 R12=00007fb9b331e430 R13=0000000000000003 R14=0000558d56c76108 R15=0000000000000000 RIP=00007fb9b321a057 RFL=00000212 [----A--] 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 00007fb9b2d6b900 00000000 00000000 GS =0000 0000000000000000 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=00007fb9b3320650 CR3=000000000e7b8000 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=ffffffffffffffff00000000ff000000 XMM02=00000000ff000000000000000000ff00 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000ffffff XMM08=5d64255b00205425206525206825003e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000