syzkaller login: [ 30.337144] BUG: Bad rss-counter state mm:00000000b72e3c06 type:MM_FILEPAGES val:33 [ 30.339596] BUG: Bad rss-counter state mm:00000000b72e3c06 type:MM_ANONPAGES val:22 [ 30.495042] ================================================================== [ 30.495938] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.497120] Read of size 8 at addr ffff88800ca034e0 by task sshd/220 [ 30.498044] [ 30.498305] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.499424] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.500599] Call Trace: [ 30.500983] [ 30.501330] dump_stack_lvl+0x91/0xf0 [ 30.501919] print_report+0xcc/0x620 [ 30.502488] ? __virt_addr_valid+0x102/0x340 [ 30.503144] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.503882] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.504641] kasan_report+0xbe/0xf0 [ 30.505230] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.505993] vma_interval_tree_remove+0xc75/0xec0 [ 30.506731] vma_prepare+0xc54/0x11a0 [ 30.507312] __split_vma+0x5af/0x950 [ 30.507893] ? __pfx___split_vma+0x10/0x10 [ 30.508586] ? find_held_lock+0x2c/0x110 [ 30.509341] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.509948] ? lock_is_held_type+0x9f/0x120 [ 30.510485] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.511124] ? mtree_range_walk+0x632/0x900 [ 30.511686] ? mas_walk+0x5c7/0x7c0 [ 30.512178] do_vmi_munmap+0x1f1/0x2b0 [ 30.512720] mmap_region+0x1f9/0x2660 [ 30.513233] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.513756] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.514507] ? __pfx_lock_acquire+0x10/0x10 [ 30.515110] ? __pfx_mmap_region+0x10/0x10 [ 30.515646] ? security_mmap_addr+0x7d/0xa0 [ 30.516188] ? get_unmapped_area+0x1f5/0x3f0 [ 30.516751] do_mmap+0x854/0xf00 [ 30.517202] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.517704] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.518287] ksys_mmap_pgoff+0x3af/0x500 [ 30.518799] do_syscall_64+0x3f/0x90 [ 30.519284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.519944] RIP: 0033:0x7f2edf0f9d82 [ 30.520428] 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 [ 30.522570] RSP: 002b:00007ffc2b350fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.523474] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2edf0f9d82 [ 30.524328] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2ede533000 [ 30.525175] RBP: 00007f2ede533000 R08: 0000000000000009 R09: 0000000000001000 [ 30.526033] R10: 0000000000000812 R11: 0000000000000206 R12: 000056061732ff70 [ 30.526882] R13: 00007ffc2b350fd0 R14: 00007ffc2b351000 R15: 00007ffc2b351360 [ 30.527734] [ 30.528029] [ 30.528246] Allocated by task 213: [ 30.528703] kasan_save_stack+0x22/0x50 [ 30.529210] kasan_set_track+0x25/0x30 [ 30.529709] __kasan_slab_alloc+0x59/0x70 [ 30.530246] kmem_cache_alloc+0x16b/0x370 [ 30.530761] vm_area_dup+0x20/0x160 [ 30.531224] __split_vma+0x170/0x950 [ 30.531693] split_vma+0xc6/0x110 [ 30.532136] mprotect_fixup+0x8d2/0xb30 [ 30.532646] do_mprotect_pkey+0x87e/0xd40 [ 30.533176] __x64_sys_mprotect+0x78/0xc0 [ 30.533697] do_syscall_64+0x3f/0x90 [ 30.534178] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.534833] [ 30.535047] Freed by task 213: [ 30.535443] kasan_save_stack+0x22/0x50 [ 30.535963] kasan_set_track+0x25/0x30 [ 30.536477] kasan_save_free_info+0x2b/0x50 [ 30.537020] __kasan_slab_free+0x10a/0x190 [ 30.537564] kmem_cache_free+0x10d/0x4d0 [ 30.538082] rcu_core+0x8c8/0x2860 [ 30.538525] __do_softirq+0x1b7/0x7d4 [ 30.539003] [ 30.539232] Last potentially related work creation: [ 30.539823] kasan_save_stack+0x22/0x50 [ 30.540341] __kasan_record_aux_stack+0x8e/0xa0 [ 30.540908] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.541559] remove_vma+0x139/0x170 [ 30.542013] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.542567] do_vmi_munmap+0x1f1/0x2b0 [ 30.543062] __vm_munmap+0x138/0x3a0 [ 30.543537] __x64_sys_munmap+0x59/0x80 [ 30.544051] do_syscall_64+0x3f/0x90 [ 30.544534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.545180] [ 30.545399] The buggy address belongs to the object at ffff88800ca03488 [ 30.545399] which belongs to the cache vm_area_struct of size 168 [ 30.546890] The buggy address is located 88 bytes inside of [ 30.546890] freed 168-byte region [ffff88800ca03488, ffff88800ca03530) [ 30.548308] [ 30.548525] The buggy address belongs to the physical page: [ 30.549186] page:000000000b5a1957 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca03 [ 30.550263] memcg:ffff88800e384201 [ 30.550697] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.551348] page_type: 0xffffffff() [ 30.551811] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.552747] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e384201 [ 30.553654] page dumped because: kasan: bad access detected [ 30.554336] [ 30.554550] Memory state around the buggy address: [ 30.555153] ffff88800ca03380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.556029] ffff88800ca03400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.556920] >ffff88800ca03480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.557764] ^ [ 30.558523] ffff88800ca03500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.559388] ffff88800ca03580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.560255] ================================================================== [ 30.561385] Disabling lock debugging due to kernel taint [ 33.011336] BUG: Bad rss-counter state mm:000000005edddc48 type:MM_FILEPAGES val:33 [ 33.012628] BUG: Bad rss-counter state mm:000000005edddc48 type:MM_ANONPAGES val:22 [ 33.403092] BUG: Bad rss-counter state mm:00000000f9821674 type:MM_FILEPAGES val:33 [ 33.404127] BUG: Bad rss-counter state mm:00000000f9821674 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4914' (ECDSA) to the list of known hosts. 2023/06/20 23:20:42 fuzzer started 2023/06/20 23:20:42 dialing manager at localhost:36067 2023/06/20 23:20:42 checking machine... 2023/06/20 23:20:42 checking revisions... [ 34.106508] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:20:42 testing simple program... [ 34.160349] cgroup: Unknown subsys name 'net' [ 34.216478] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:20:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff846000aa RCX=0000000000000001 RDX=1ffff1100309ef35 RSI=ffff8880184f7f48 RDI=ffffffff846000aa RBP=ffffffff846000aa RSP=ffff8880184f7900 R8 =0000000000000001 R9 =ffff8880184f7990 R10=0000000000038001 R11=00000000000b5080 R12=0000000000000001 R13=0000000000000000 R14=ffff888016539b40 R15=ffff88801c9e8000 RIP=ffffffff811fc772 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 00007f871e437900 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=00007f871e9ec650 CR3=000000000c758000 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=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007fffbbee82f8 CR3=0000000015e8a000 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=2032343a30323a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a30323a3332203032 XMM08=20303d64696720303d64697520612f6e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000