syzkaller login: [ 31.239620] BUG: Bad rss-counter state mm:0000000042b05953 type:MM_FILEPAGES val:33 [ 31.241282] BUG: Bad rss-counter state mm:0000000042b05953 type:MM_ANONPAGES val:22 [ 31.406669] ================================================================== [ 31.407561] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.408478] Read of size 8 at addr ffff88800e501d08 by task sshd/220 [ 31.409364] [ 31.409580] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.410427] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.411396] Call Trace: [ 31.411711] [ 31.411990] dump_stack_lvl+0x91/0xf0 [ 31.412477] print_report+0xcc/0x620 [ 31.412955] ? __virt_addr_valid+0x102/0x340 [ 31.413507] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.414111] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.414713] kasan_report+0xbe/0xf0 [ 31.415186] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.415799] vma_interval_tree_remove+0xc75/0xec0 [ 31.416395] vma_prepare+0xc54/0x11a0 [ 31.416869] __split_vma+0x5af/0x950 [ 31.417342] ? __pfx___split_vma+0x10/0x10 [ 31.417861] ? find_held_lock+0x2c/0x110 [ 31.418373] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.418927] ? lock_is_held_type+0x9f/0x120 [ 31.419462] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.420066] ? mtree_range_walk+0x632/0x900 [ 31.420616] ? mas_walk+0x5c7/0x7c0 [ 31.421084] do_vmi_munmap+0x1f1/0x2b0 [ 31.421594] mmap_region+0x1f9/0x2660 [ 31.422072] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.422582] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.423289] ? __pfx_lock_acquire+0x10/0x10 [ 31.423813] ? __pfx_mmap_region+0x10/0x10 [ 31.424333] ? security_mmap_addr+0x7d/0xa0 [ 31.424861] ? get_unmapped_area+0x1f5/0x3f0 [ 31.425411] do_mmap+0x854/0xf00 [ 31.425847] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.426341] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.426898] ksys_mmap_pgoff+0x3af/0x500 [ 31.427398] do_syscall_64+0x3f/0x90 [ 31.427873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.428512] RIP: 0033:0x7f68ff6ffd82 [ 31.428963] 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 [ 31.431095] RSP: 002b:00007ffcbf29ed08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.432009] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f68ff6ffd82 [ 31.432859] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f68feb39000 [ 31.433713] RBP: 00007f68feb39000 R08: 0000000000000009 R09: 0000000000001000 [ 31.434558] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aba76b5ec0 [ 31.435391] R13: 00007ffcbf29ed20 R14: 00007ffcbf29ed50 R15: 00007ffcbf29f0b0 [ 31.436239] [ 31.436527] [ 31.436741] Allocated by task 213: [ 31.437189] kasan_save_stack+0x22/0x50 [ 31.437694] kasan_set_track+0x25/0x30 [ 31.438182] __kasan_slab_alloc+0x59/0x70 [ 31.438704] kmem_cache_alloc+0x16b/0x370 [ 31.439217] vm_area_dup+0x20/0x160 [ 31.439664] __split_vma+0x170/0x950 [ 31.440123] split_vma+0xc6/0x110 [ 31.440558] mprotect_fixup+0x8d2/0xb30 [ 31.441055] do_mprotect_pkey+0x87e/0xd40 [ 31.441583] __x64_sys_mprotect+0x78/0xc0 [ 31.442107] do_syscall_64+0x3f/0x90 [ 31.442577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.443206] [ 31.443417] Freed by task 210: [ 31.443807] kasan_save_stack+0x22/0x50 [ 31.444305] kasan_set_track+0x25/0x30 [ 31.444792] kasan_save_free_info+0x2b/0x50 [ 31.445334] __kasan_slab_free+0x10a/0x190 [ 31.445859] kmem_cache_free+0x10d/0x4d0 [ 31.446363] rcu_core+0x8c8/0x2860 [ 31.446801] __do_softirq+0x1b7/0x7d4 [ 31.447270] [ 31.447481] Last potentially related work creation: [ 31.448059] kasan_save_stack+0x22/0x50 [ 31.448559] __kasan_record_aux_stack+0x8e/0xa0 [ 31.449126] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.449782] remove_vma+0x139/0x170 [ 31.450226] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.450773] do_vmi_munmap+0x1f1/0x2b0 [ 31.451254] __vm_munmap+0x138/0x3a0 [ 31.451721] __x64_sys_munmap+0x59/0x80 [ 31.452208] do_syscall_64+0x3f/0x90 [ 31.452678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.453322] [ 31.453534] The buggy address belongs to the object at ffff88800e501cb0 [ 31.453534] which belongs to the cache vm_area_struct of size 168 [ 31.454973] The buggy address is located 88 bytes inside of [ 31.454973] freed 168-byte region [ffff88800e501cb0, ffff88800e501d58) [ 31.456346] [ 31.456558] The buggy address belongs to the physical page: [ 31.457214] page:0000000035f24d57 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe501 [ 31.458278] memcg:ffff88800fc75f01 [ 31.458698] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.459338] page_type: 0xffffffff() [ 31.459782] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.460683] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc75f01 [ 31.461590] page dumped because: kasan: bad access detected [ 31.462245] [ 31.462456] Memory state around the buggy address: [ 31.463037] ffff88800e501c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.463884] ffff88800e501c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.464739] >ffff88800e501d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.465598] ^ [ 31.466036] ffff88800e501d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.466891] ffff88800e501e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.467731] ================================================================== [ 31.468688] Disabling lock debugging due to kernel taint [ 33.331342] BUG: Bad rss-counter state mm:000000001e741d7a type:MM_FILEPAGES val:33 [ 33.332340] BUG: Bad rss-counter state mm:000000001e741d7a type:MM_ANONPAGES val:22 [ 33.809890] BUG: Bad rss-counter state mm:000000006833d359 type:MM_FILEPAGES val:33 [ 33.810969] BUG: Bad rss-counter state mm:000000006833d359 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22017' (ECDSA) to the list of known hosts. 2023/06/19 18:11:47 fuzzer started 2023/06/19 18:11:47 dialing manager at localhost:44161 2023/06/19 18:11:47 checking machine... 2023/06/19 18:11:47 checking revisions... [ 34.510827] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:11:47 testing simple program... [ 34.557931] cgroup: Unknown subsys name 'net' [ 34.610829] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:11:46 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f89a16bf270 CR3=0000000008dc2000 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=a715eec5bfa8adb06840fdc2736e089f XMM02=0000000000122bb0eff9b2d0a8fce9cb XMM03=0000000000122c802c67c8bc2e329bc3 XMM04=bab18fbee334d0bb00000000000ae988 XMM05=19e9129bd510f23500000000001357c0 XMM06=6cd36d58d0a55d650000000000134628 XMM07=e042d86d42eb936e0000000000126660 XMM08=7085e07a5fc9701c0000000000122c80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000200 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88806cf3a2c0 RSP=ffff88806cf09e38 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffffffff85616740 R13=0000000000000246 R14=00000000000067e1 R15=ffff88806cf3a2d2 RIP=ffffffff8136ab0b RFL=00000086 [--S--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 00007f11d37ee900 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=00007ffed08e3000 CR3=000000001a41e000 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=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