syzkaller login: [ 42.904642] BUG: Bad rss-counter state mm:00000000e13ff129 type:MM_FILEPAGES val:33 [ 42.906118] BUG: Bad rss-counter state mm:00000000e13ff129 type:MM_ANONPAGES val:22 [ 43.064132] ================================================================== [ 43.065229] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.066467] Read of size 8 at addr ffff888017c26968 by task sshd/219 [ 43.067463] [ 43.067736] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.068882] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.070048] Call Trace: [ 43.070426] [ 43.070780] dump_stack_lvl+0x91/0xf0 [ 43.071350] print_report+0xcc/0x620 [ 43.071926] ? __virt_addr_valid+0x102/0x340 [ 43.072582] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.073331] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.074107] kasan_report+0xbe/0xf0 [ 43.074703] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.075489] vma_interval_tree_remove+0xc75/0xec0 [ 43.076241] vma_prepare+0xc54/0x11a0 [ 43.076848] __split_vma+0x5af/0x950 [ 43.077444] ? __pfx___split_vma+0x10/0x10 [ 43.078110] ? find_held_lock+0x2c/0x110 [ 43.078782] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.079400] ? lock_is_held_type+0x9f/0x120 [ 43.079936] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.080537] ? mtree_range_walk+0x632/0x900 [ 43.081085] ? mas_walk+0x5c7/0x7c0 [ 43.081548] do_vmi_munmap+0x1f1/0x2b0 [ 43.082041] mmap_region+0x1f9/0x2660 [ 43.082515] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.083036] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.083750] ? __pfx_lock_acquire+0x10/0x10 [ 43.084268] ? __pfx_mmap_region+0x10/0x10 [ 43.084831] ? security_mmap_addr+0x7d/0xa0 [ 43.085376] ? get_unmapped_area+0x1f5/0x3f0 [ 43.085919] do_mmap+0x854/0xf00 [ 43.086355] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.086860] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.087425] ksys_mmap_pgoff+0x3af/0x500 [ 43.087939] do_syscall_64+0x3f/0x90 [ 43.088416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.089069] RIP: 0033:0x7f0c885cbd82 [ 43.089528] 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 [ 43.091670] RSP: 002b:00007fffab5aa4a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.092565] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0c885cbd82 [ 43.093437] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0c87a05000 [ 43.094249] RBP: 00007f0c87a05000 R08: 0000000000000009 R09: 0000000000001000 [ 43.095059] R10: 0000000000000812 R11: 0000000000000206 R12: 00005588f6731ec0 [ 43.095911] R13: 00007fffab5aa4c0 R14: 00007fffab5aa4f0 R15: 00007fffab5aa850 [ 43.096729] [ 43.097012] [ 43.097221] Allocated by task 212: [ 43.097625] kasan_save_stack+0x22/0x50 [ 43.098103] kasan_set_track+0x25/0x30 [ 43.098573] __kasan_slab_alloc+0x59/0x70 [ 43.099131] kmem_cache_alloc+0x16b/0x370 [ 43.099640] vm_area_dup+0x20/0x160 [ 43.100091] __split_vma+0x170/0x950 [ 43.100556] split_vma+0xc6/0x110 [ 43.100995] mprotect_fixup+0x8d2/0xb30 [ 43.101496] do_mprotect_pkey+0x87e/0xd40 [ 43.102015] __x64_sys_mprotect+0x78/0xc0 [ 43.102538] do_syscall_64+0x3f/0x90 [ 43.103031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.103714] [ 43.103930] Freed by task 212: [ 43.104327] kasan_save_stack+0x22/0x50 [ 43.104833] kasan_set_track+0x25/0x30 [ 43.105326] kasan_save_free_info+0x2b/0x50 [ 43.105860] __kasan_slab_free+0x10a/0x190 [ 43.106391] kmem_cache_free+0x10d/0x4d0 [ 43.106905] rcu_core+0x8c8/0x2860 [ 43.107351] __do_softirq+0x1b7/0x7d4 [ 43.107823] [ 43.108036] Last potentially related work creation: [ 43.108615] kasan_save_stack+0x22/0x50 [ 43.109119] __kasan_record_aux_stack+0x8e/0xa0 [ 43.109689] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.110341] remove_vma+0x139/0x170 [ 43.110807] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.111363] do_vmi_munmap+0x1f1/0x2b0 [ 43.111846] __vm_munmap+0x138/0x3a0 [ 43.112372] __x64_sys_munmap+0x59/0x80 [ 43.112866] do_syscall_64+0x3f/0x90 [ 43.113317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.113921] [ 43.114126] The buggy address belongs to the object at ffff888017c26910 [ 43.114126] which belongs to the cache vm_area_struct of size 168 [ 43.115526] The buggy address is located 88 bytes inside of [ 43.115526] freed 168-byte region [ffff888017c26910, ffff888017c269b8) [ 43.116844] [ 43.117051] The buggy address belongs to the physical page: [ 43.117677] page:000000009a213078 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17c26 [ 43.118717] memcg:ffff88800d701a01 [ 43.119120] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 43.119773] page_type: 0xffffffff() [ 43.120201] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 43.121072] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d701a01 [ 43.121924] page dumped because: kasan: bad access detected [ 43.122565] [ 43.122787] Memory state around the buggy address: [ 43.123355] ffff888017c26800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 43.124203] ffff888017c26880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 43.125035] >ffff888017c26900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.125866] ^ [ 43.126630] ffff888017c26980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 43.127494] ffff888017c26a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.128326] ================================================================== [ 43.129446] Disabling lock debugging due to kernel taint [ 45.030010] BUG: Bad rss-counter state mm:00000000b20bb390 type:MM_FILEPAGES val:33 [ 45.031015] BUG: Bad rss-counter state mm:00000000b20bb390 type:MM_ANONPAGES val:22 [ 45.515060] BUG: Bad rss-counter state mm:00000000d08cdfdb type:MM_FILEPAGES val:33 [ 45.516240] BUG: Bad rss-counter state mm:00000000d08cdfdb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25169' (ECDSA) to the list of known hosts. 2023/06/19 18:42:10 fuzzer started 2023/06/19 18:42:11 dialing manager at localhost:44161 2023/06/19 18:42:11 checking machine... 2023/06/19 18:42:11 checking revisions... [ 46.246245] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:42:11 testing simple program... [ 46.296155] cgroup: Unknown subsys name 'net' [ 46.350241] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:41:58 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff888010133780 RCX=ffffffff8451836e RDX=ffffed10020266f1 RSI=0000000000000004 RDI=ffff888010133780 RBP=ffff888017eafb88 RSP=ffff888017eafa58 R8 =0000000000000001 R9 =ffffed10020266f0 R10=ffff888010133783 R11=ffff888008c58000 R12=ffff88806ce39500 R13=ffff88800b8e8000 R14=ffffffff8542ab68 R15=ffffffff8542a6c0 RIP=ffffffff84518371 RFL=00000002 [-------] 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 00007ff947e77700 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=00007fb956e3d000 CR3=000000001472e000 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=2030313a32343a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a32343a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb783e RBX=ffffffff85dbc1f4 RCX=ffffffff813ad6cf RDX=0000000000000000 RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffffffff85dbc1f4 RSP=ffff8880093b6ca0 R8 =ffffffff860d68c0 R9 =ffff8880093b6d98 R10=0000000000038001 R11=0000000000010b7e R12=ffffffff85dbc1f4 R13=ffffffff85dbc1cc R14=ffffffff85dbc1f0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 00007f23a0141900 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=00007f23a0120020 CR3=0000000014728000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000