syzkaller login: [ 35.943809] BUG: Bad rss-counter state mm:0000000019fb3e0f type:MM_FILEPAGES val:33 [ 35.945029] BUG: Bad rss-counter state mm:0000000019fb3e0f type:MM_ANONPAGES val:22 [ 35.985902] ================================================================== [ 35.986969] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.987963] Read of size 8 at addr ffff88801a1bc798 by task sshd/220 [ 35.988772] [ 35.989005] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.989913] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.990968] Call Trace: [ 35.991319] [ 35.991630] dump_stack_lvl+0x91/0xf0 [ 35.992158] print_report+0xcc/0x620 [ 35.992676] ? __virt_addr_valid+0x102/0x340 [ 35.993266] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.993931] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.994618] kasan_report+0xbe/0xf0 [ 35.995132] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.995804] vma_interval_tree_remove+0xc75/0xec0 [ 35.996463] vma_prepare+0xc54/0x11a0 [ 35.996986] __split_vma+0x5af/0x950 [ 35.997496] ? __pfx___split_vma+0x10/0x10 [ 35.998073] ? find_held_lock+0x2c/0x110 [ 35.998642] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.999256] ? lock_is_held_type+0x9f/0x120 [ 35.999840] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.000493] ? mtree_range_walk+0x632/0x900 [ 36.001092] ? mas_walk+0x5c7/0x7c0 [ 36.001605] do_vmi_munmap+0x1f1/0x2b0 [ 36.002143] mmap_region+0x1f9/0x2660 [ 36.002672] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.003229] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.004005] ? __pfx_lock_acquire+0x10/0x10 [ 36.004586] ? __pfx_mmap_region+0x10/0x10 [ 36.005161] ? security_mmap_addr+0x7d/0xa0 [ 36.005730] ? get_unmapped_area+0x1f5/0x3f0 [ 36.006324] do_mmap+0x854/0xf00 [ 36.006819] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.007357] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.007963] ksys_mmap_pgoff+0x3af/0x500 [ 36.008513] do_syscall_64+0x3f/0x90 [ 36.009031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.009723] RIP: 0033:0x7fa0accfcd82 [ 36.010213] 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 [ 36.012664] RSP: 002b:00007ffd1b6fd208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.013646] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa0accfcd82 [ 36.014567] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa0ac136000 [ 36.015465] RBP: 00007fa0ac136000 R08: 0000000000000009 R09: 0000000000001000 [ 36.016366] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cb729d5ec0 [ 36.017262] R13: 00007ffd1b6fd220 R14: 00007ffd1b6fd250 R15: 00007ffd1b6fd5b0 [ 36.018174] [ 36.018487] [ 36.018717] Allocated by task 213: [ 36.019174] kasan_save_stack+0x22/0x50 [ 36.019709] kasan_set_track+0x25/0x30 [ 36.020231] __kasan_slab_alloc+0x59/0x70 [ 36.020805] kmem_cache_alloc+0x16b/0x370 [ 36.021358] vm_area_dup+0x20/0x160 [ 36.021841] __split_vma+0x170/0x950 [ 36.022341] split_vma+0xc6/0x110 [ 36.022815] mprotect_fixup+0x8d2/0xb30 [ 36.023349] do_mprotect_pkey+0x87e/0xd40 [ 36.023903] __x64_sys_mprotect+0x78/0xc0 [ 36.024454] do_syscall_64+0x3f/0x90 [ 36.024956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.025643] [ 36.025872] Freed by task 213: [ 36.026292] kasan_save_stack+0x22/0x50 [ 36.026843] kasan_set_track+0x25/0x30 [ 36.027370] kasan_save_free_info+0x2b/0x50 [ 36.027938] __kasan_slab_free+0x10a/0x190 [ 36.028504] kmem_cache_free+0x10d/0x4d0 [ 36.029044] rcu_core+0x8c8/0x2860 [ 36.029513] __do_softirq+0x1b7/0x7d4 [ 36.030022] [ 36.030252] Last potentially related work creation: [ 36.030887] kasan_save_stack+0x22/0x50 [ 36.031427] __kasan_record_aux_stack+0x8e/0xa0 [ 36.032040] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.032723] remove_vma+0x139/0x170 [ 36.033205] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.033797] do_vmi_munmap+0x1f1/0x2b0 [ 36.034309] __vm_munmap+0x138/0x3a0 [ 36.034824] __x64_sys_munmap+0x59/0x80 [ 36.035352] do_syscall_64+0x3f/0x90 [ 36.035854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.036538] [ 36.036769] The buggy address belongs to the object at ffff88801a1bc740 [ 36.036769] which belongs to the cache vm_area_struct of size 168 [ 36.038326] The buggy address is located 88 bytes inside of [ 36.038326] freed 168-byte region [ffff88801a1bc740, ffff88801a1bc7e8) [ 36.039820] [ 36.040052] The buggy address belongs to the physical page: [ 36.040754] page:0000000038991348 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1bc [ 36.041938] memcg:ffff888018dfeb01 [ 36.042393] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.043089] page_type: 0xffffffff() [ 36.043569] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.044543] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018dfeb01 [ 36.045508] page dumped because: kasan: bad access detected [ 36.046207] [ 36.046452] Memory state around the buggy address: [ 36.047077] ffff88801a1bc680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.047980] ffff88801a1bc700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 36.048890] >ffff88801a1bc780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 36.049800] ^ [ 36.050330] ffff88801a1bc800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 36.051250] ffff88801a1bc880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 36.052154] ================================================================== [ 36.053490] Disabling lock debugging due to kernel taint [ 37.990498] BUG: Bad rss-counter state mm:0000000010c68cfb type:MM_FILEPAGES val:33 [ 37.991609] BUG: Bad rss-counter state mm:0000000010c68cfb type:MM_ANONPAGES val:22 [ 38.466962] BUG: Bad rss-counter state mm:00000000426e5905 type:MM_FILEPAGES val:33 [ 38.467963] BUG: Bad rss-counter state mm:00000000426e5905 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57347' (ECDSA) to the list of known hosts. 2023/06/20 02:15:17 fuzzer started 2023/06/20 02:15:18 dialing manager at localhost:44161 2023/06/20 02:15:18 checking machine... 2023/06/20 02:15:18 checking revisions... [ 39.200087] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:15:18 testing simple program... [ 39.247951] cgroup: Unknown subsys name 'net' [ 39.299394] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:15:13 Registers: info registers vcpu 0 RAX=ffff888018dc0000 RBX=ffff888018dbfd18 RCX=0000000000000001 RDX=ffff888018dbfd20 RSI=ffff888018dbfcf0 RDI=ffff888018dbf970 RBP=ffff888018db8000 RSP=ffff888018dbf8f0 R8 =0000000000000001 R9 =ffff888018dbf9a0 R10=0000000000038001 R11=000000000001d00c R12=ffff888018dbf9c0 R13=ffff888018dbf9a8 R14=ffff888018dbfcf0 R15=ffff888018dbf960 RIP=ffffffff81131296 RFL=00000287 [--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 00007fbdadd1f900 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=00007fff81ec8000 CR3=000000001a38a000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000101 RBX=ffff88806cf09d68 RCX=0000000000000100 RDX=ffff888008d751c0 RSI=ffffffff818313f3 RDI=ffff888008c421e0 RBP=ffff88806cf09d70 RSP=ffff88806cf09d08 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000060dc R11=0000000000000000 R12=ffff88806cf09d68 R13=ffffed10031c3a02 R14=dffffc0000000000 R15=ffff888018e1d010 RIP=ffffffff814c080b RFL=00000206 [-----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 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=00007fb539264160 CR3=0000000008f3c000 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=2037313a35313a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a35313a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000