syzkaller login: [ 31.516183] BUG: Bad rss-counter state mm:000000006e88374d type:MM_FILEPAGES val:33 [ 31.516929] BUG: Bad rss-counter state mm:000000006e88374d type:MM_ANONPAGES val:22 [ 31.654190] ================================================================== [ 31.654931] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.655613] Read of size 8 at addr ffff8880160e7b38 by task sshd/220 [ 31.656186] [ 31.656346] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.656985] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.657732] Call Trace: [ 31.658014] [ 31.658353] dump_stack_lvl+0x91/0xf0 [ 31.658734] print_report+0xcc/0x620 [ 31.659088] ? __virt_addr_valid+0x102/0x340 [ 31.659495] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.659944] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.660415] kasan_report+0xbe/0xf0 [ 31.660763] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.661219] vma_interval_tree_remove+0xc75/0xec0 [ 31.661647] vma_prepare+0xc54/0x11a0 [ 31.662045] __split_vma+0x5af/0x950 [ 31.662391] ? __pfx___split_vma+0x10/0x10 [ 31.662766] ? find_held_lock+0x2c/0x110 [ 31.663143] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.663555] ? lock_is_held_type+0x9f/0x120 [ 31.663948] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.664391] ? mtree_range_walk+0x632/0x900 [ 31.664803] ? mas_walk+0x5c7/0x7c0 [ 31.665150] do_vmi_munmap+0x1f1/0x2b0 [ 31.665500] mmap_region+0x1f9/0x2660 [ 31.665874] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.666254] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.666783] ? __pfx_lock_acquire+0x10/0x10 [ 31.667176] ? __pfx_mmap_region+0x10/0x10 [ 31.667575] ? security_mmap_addr+0x7d/0xa0 [ 31.667993] ? get_unmapped_area+0x1f5/0x3f0 [ 31.668385] do_mmap+0x854/0xf00 [ 31.668707] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.669063] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.669476] ksys_mmap_pgoff+0x3af/0x500 [ 31.669867] do_syscall_64+0x3f/0x90 [ 31.670231] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.670708] RIP: 0033:0x7f0bc3bead82 [ 31.671084] 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 [ 31.672683] RSP: 002b:00007ffe2639f358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.673345] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0bc3bead82 [ 31.673996] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0bc3024000 [ 31.674601] RBP: 00007f0bc3024000 R08: 0000000000000009 R09: 0000000000001000 [ 31.675250] R10: 0000000000000812 R11: 0000000000000206 R12: 00005560fe59b980 [ 31.675854] R13: 00007ffe2639f370 R14: 00007ffe2639f3a0 R15: 00007ffe2639f700 [ 31.676484] [ 31.676760] [ 31.676913] Allocated by task 213: [ 31.677222] kasan_save_stack+0x22/0x50 [ 31.677579] kasan_set_track+0x25/0x30 [ 31.677975] __kasan_slab_alloc+0x59/0x70 [ 31.678347] kmem_cache_alloc+0x16b/0x370 [ 31.678716] vm_area_dup+0x20/0x160 [ 31.679039] __split_vma+0x170/0x950 [ 31.679377] split_vma+0xc6/0x110 [ 31.679688] mprotect_fixup+0x8d2/0xb30 [ 31.680044] do_mprotect_pkey+0x87e/0xd40 [ 31.680421] __x64_sys_mprotect+0x78/0xc0 [ 31.680810] do_syscall_64+0x3f/0x90 [ 31.681162] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.681639] [ 31.681801] Freed by task 213: [ 31.682076] kasan_save_stack+0x22/0x50 [ 31.682439] kasan_set_track+0x25/0x30 [ 31.682824] kasan_save_free_info+0x2b/0x50 [ 31.683211] __kasan_slab_free+0x10a/0x190 [ 31.683597] kmem_cache_free+0x10d/0x4d0 [ 31.684012] rcu_core+0x8c8/0x2860 [ 31.684330] __do_softirq+0x1b7/0x7d4 [ 31.684691] [ 31.684850] Last potentially related work creation: [ 31.685265] kasan_save_stack+0x22/0x50 [ 31.685622] __kasan_record_aux_stack+0x8e/0xa0 [ 31.686037] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.686493] remove_vma+0x139/0x170 [ 31.686815] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.687211] do_vmi_munmap+0x1f1/0x2b0 [ 31.687546] __vm_munmap+0x138/0x3a0 [ 31.687885] __x64_sys_munmap+0x59/0x80 [ 31.688256] do_syscall_64+0x3f/0x90 [ 31.688608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.689103] [ 31.689256] The buggy address belongs to the object at ffff8880160e7ae0 [ 31.689256] which belongs to the cache vm_area_struct of size 168 [ 31.690334] The buggy address is located 88 bytes inside of [ 31.690334] freed 168-byte region [ffff8880160e7ae0, ffff8880160e7b88) [ 31.691377] [ 31.691536] The buggy address belongs to the physical page: [ 31.692029] page:000000002ef9e1df refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x160e7 [ 31.692907] memcg:ffff88801a147701 [ 31.693224] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.693696] page_type: 0xffffffff() [ 31.694083] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.694780] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a147701 [ 31.695440] page dumped because: kasan: bad access detected [ 31.695930] [ 31.696085] Memory state around the buggy address: [ 31.696517] ffff8880160e7a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.697186] ffff8880160e7a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.697803] >ffff8880160e7b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.698430] ^ [ 31.698876] ffff8880160e7b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.699498] ffff8880160e7c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.700149] ================================================================== [ 31.700963] Disabling lock debugging due to kernel taint [ 33.296880] BUG: Bad rss-counter state mm:00000000e9820143 type:MM_FILEPAGES val:33 [ 33.297608] BUG: Bad rss-counter state mm:00000000e9820143 type:MM_ANONPAGES val:22 [ 33.607161] BUG: Bad rss-counter state mm:000000008913b328 type:MM_FILEPAGES val:33 [ 33.607894] BUG: Bad rss-counter state mm:000000008913b328 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61186' (ECDSA) to the list of known hosts. 2023/06/20 09:11:53 fuzzer started 2023/06/20 09:11:53 dialing manager at localhost:44161 2023/06/20 09:11:53 checking machine... 2023/06/20 09:11:53 checking revisions... [ 34.189677] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:11:53 testing simple program... [ 34.228860] cgroup: Unknown subsys name 'net' [ 34.279912] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:11:52 Registers: info registers vcpu 0 RAX=1ffff11002c22f19 RBX=ffff8880161178b8 RCX=1ffff110033b7c5b RDX=dffffc0000000000 RSI=ffffffff87b86f80 RDI=ffff888019dbe2d8 RBP=ffff88801033d198 RSP=ffff888016d4fcf8 R8 =0000000000000001 R9 =ffffed1002da9f97 R10=0000000000000003 R11=00000000000b6cb2 R12=ffff8880161178c8 R13=ffff88800eedc198 R14=ffff888019dbe2c8 R15=ffffffff87b86f80 RIP=ffffffff844cc26f RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f45ae05c900 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=000055a653767818 CR3=0000000015818000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=736f6c63206e6f697463656e6e6f4300 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000008f07a2b9 RBX=ffffffff849f4ae4 RCX=00000000000000a2 RDX=ffff88800e9cd1c0 RSI=0000000000000000 RDI=ffff88801780ed48 RBP=00000000b67083b4 RSP=ffff888016ee7658 R8 =0000000000000006 R9 =000000000000000f R10=0000000000000009 R11=0000000000000000 R12=dffffc0000000000 R13=ffffffff849f2c00 R14=0000000000000009 R15=ffff88801780ed44 RIP=ffffffff8219de12 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 00007f9e3b320700 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=00007ffd7900a398 CR3=000000000e55c000 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=2033353a31313a3930203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a31313a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000