syzkaller login: [ 31.070892] BUG: Bad rss-counter state mm:0000000046a85770 type:MM_FILEPAGES val:33 [ 31.072105] BUG: Bad rss-counter state mm:0000000046a85770 type:MM_ANONPAGES val:22 [ 31.114810] ================================================================== [ 31.115745] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.116691] Read of size 8 at addr ffff88800ebd6b38 by task sshd/219 [ 31.117462] [ 31.117680] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.118548] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.119537] Call Trace: [ 31.119858] [ 31.120142] dump_stack_lvl+0x91/0xf0 [ 31.120631] print_report+0xcc/0x620 [ 31.121277] ? __virt_addr_valid+0x102/0x340 [ 31.121833] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.122465] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.123114] kasan_report+0xbe/0xf0 [ 31.123585] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.124206] vma_interval_tree_remove+0xc75/0xec0 [ 31.124801] vma_prepare+0xc54/0x11a0 [ 31.125276] __split_vma+0x5af/0x950 [ 31.125749] ? __pfx___split_vma+0x10/0x10 [ 31.126272] ? find_held_lock+0x2c/0x110 [ 31.126792] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.127358] ? lock_is_held_type+0x9f/0x120 [ 31.127893] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.128494] ? mtree_range_walk+0x632/0x900 [ 31.129040] ? mas_walk+0x5c7/0x7c0 [ 31.129510] do_vmi_munmap+0x1f1/0x2b0 [ 31.130000] mmap_region+0x1f9/0x2660 [ 31.130484] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.131016] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.131723] ? __pfx_lock_acquire+0x10/0x10 [ 31.132259] ? __pfx_mmap_region+0x10/0x10 [ 31.132789] ? security_mmap_addr+0x7d/0xa0 [ 31.133315] ? get_unmapped_area+0x1f5/0x3f0 [ 31.133871] do_mmap+0x854/0xf00 [ 31.134316] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.134820] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.135400] ksys_mmap_pgoff+0x3af/0x500 [ 31.135911] do_syscall_64+0x3f/0x90 [ 31.136389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.137030] RIP: 0033:0x7f056e840d82 [ 31.137502] 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 [ 31.139643] RSP: 002b:00007ffe0cba3cb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.140536] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f056e840d82 [ 31.141383] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f056dc7a000 [ 31.142230] RBP: 00007f056dc7a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.143088] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563bd943cec0 [ 31.143931] R13: 00007ffe0cba3cd0 R14: 00007ffe0cba3d00 R15: 00007ffe0cba4060 [ 31.144782] [ 31.145080] [ 31.145297] Allocated by task 212: [ 31.145719] kasan_save_stack+0x22/0x50 [ 31.146231] kasan_set_track+0x25/0x30 [ 31.146724] __kasan_slab_alloc+0x59/0x70 [ 31.147258] kmem_cache_alloc+0x16b/0x370 [ 31.147778] vm_area_dup+0x20/0x160 [ 31.148237] __split_vma+0x170/0x950 [ 31.148709] split_vma+0xc6/0x110 [ 31.149146] mprotect_fixup+0x8d2/0xb30 [ 31.149650] do_mprotect_pkey+0x87e/0xd40 [ 31.150165] __x64_sys_mprotect+0x78/0xc0 [ 31.150690] do_syscall_64+0x3f/0x90 [ 31.151174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.151816] [ 31.152040] Freed by task 212: [ 31.152434] kasan_save_stack+0x22/0x50 [ 31.152940] kasan_set_track+0x25/0x30 [ 31.153426] kasan_save_free_info+0x2b/0x50 [ 31.153964] __kasan_slab_free+0x10a/0x190 [ 31.154491] kmem_cache_free+0x10d/0x4d0 [ 31.155024] rcu_core+0x8c8/0x2860 [ 31.155463] __do_softirq+0x1b7/0x7d4 [ 31.155937] [ 31.156154] Last potentially related work creation: [ 31.156742] kasan_save_stack+0x22/0x50 [ 31.157245] __kasan_record_aux_stack+0x8e/0xa0 [ 31.157819] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.158466] remove_vma+0x139/0x170 [ 31.158931] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.159482] do_vmi_munmap+0x1f1/0x2b0 [ 31.159968] __vm_munmap+0x138/0x3a0 [ 31.160437] __x64_sys_munmap+0x59/0x80 [ 31.160933] do_syscall_64+0x3f/0x90 [ 31.161409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.162048] [ 31.162269] Second to last potentially related work creation: [ 31.162967] kasan_save_stack+0x22/0x50 [ 31.163475] __kasan_record_aux_stack+0x8e/0xa0 [ 31.164051] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.164697] remove_vma+0x139/0x170 [ 31.165149] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.165721] do_vmi_munmap+0x1f1/0x2b0 [ 31.166213] mmap_region+0x1f9/0x2660 [ 31.166696] do_mmap+0x854/0xf00 [ 31.167147] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.167644] ksys_mmap_pgoff+0x3af/0x500 [ 31.168154] do_syscall_64+0x3f/0x90 [ 31.168633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.169293] [ 31.169508] The buggy address belongs to the object at ffff88800ebd6ae0 [ 31.169508] which belongs to the cache vm_area_struct of size 168 [ 31.170999] The buggy address is located 88 bytes inside of [ 31.170999] freed 168-byte region [ffff88800ebd6ae0, ffff88800ebd6b88) [ 31.172406] [ 31.172623] The buggy address belongs to the physical page: [ 31.173284] page:00000000acaff3e5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebd6 [ 31.174357] memcg:ffff88800e418701 [ 31.174780] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.175440] page_type: 0xffffffff() [ 31.175893] raw: 0100000000000200 ffff88800879fc80 ffffea00003b6080 dead000000000002 [ 31.176814] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e418701 [ 31.177717] page dumped because: kasan: bad access detected [ 31.178381] [ 31.178597] Memory state around the buggy address: [ 31.179186] ffff88800ebd6a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.180037] ffff88800ebd6a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.180886] >ffff88800ebd6b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.181735] ^ [ 31.182364] ffff88800ebd6b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 31.183231] ffff88800ebd6c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.184073] ================================================================== [ 31.185105] Disabling lock debugging due to kernel taint [ 32.969921] BUG: Bad rss-counter state mm:00000000c5c4677c type:MM_FILEPAGES val:33 [ 32.971030] BUG: Bad rss-counter state mm:00000000c5c4677c type:MM_ANONPAGES val:22 [ 33.402688] BUG: Bad rss-counter state mm:0000000077081d35 type:MM_FILEPAGES val:33 [ 33.403742] BUG: Bad rss-counter state mm:0000000077081d35 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21743' (ECDSA) to the list of known hosts. 2023/06/20 06:08:31 fuzzer started 2023/06/20 06:08:31 dialing manager at localhost:44161 2023/06/20 06:08:31 checking machine... 2023/06/20 06:08:31 checking revisions... [ 34.031282] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:08:31 testing simple program... [ 34.076089] cgroup: Unknown subsys name 'net' [ 34.125344] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:08:30 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=00007f57d7cbe000 CR3=000000000e054000 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=2030333a38303a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a38303a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff846000a9 RDX=0000000000036000 RSI=0000000000036000 RDI=ffffffff865bfbc0 RBP=ffff8880168cf3e0 RSP=ffff8880168cf318 R8 =0000000000000000 R9 =ffff8880168cf3c8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff8880168cf3e8 R13=ffff8880168cf3d0 R14=ffff8880168cf3c9 R15=ffff8880168cf388 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 00007fa547e2f900 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=00007ffd81491000 CR3=0000000018312000 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