syzkaller login: [ 38.711230] BUG: Bad rss-counter state mm:00000000dbc0ac82 type:MM_FILEPAGES val:33 [ 38.712474] BUG: Bad rss-counter state mm:00000000dbc0ac82 type:MM_ANONPAGES val:22 [ 38.875887] ================================================================== [ 38.876850] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.877801] Read of size 8 at addr ffff88800e65e798 by task sshd/220 [ 38.878571] [ 38.878784] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.879733] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.880759] Call Trace: [ 38.881075] [ 38.881382] dump_stack_lvl+0x91/0xf0 [ 38.881876] print_report+0xcc/0x620 [ 38.882360] ? __virt_addr_valid+0x102/0x340 [ 38.882917] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.883536] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.884163] kasan_report+0xbe/0xf0 [ 38.884672] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.885289] vma_interval_tree_remove+0xc75/0xec0 [ 38.885893] vma_prepare+0xc54/0x11a0 [ 38.886368] __split_vma+0x5af/0x950 [ 38.886842] ? __pfx___split_vma+0x10/0x10 [ 38.887378] ? find_held_lock+0x2c/0x110 [ 38.887898] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.888498] ? lock_is_held_type+0x9f/0x120 [ 38.889038] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.889646] ? mtree_range_walk+0x632/0x900 [ 38.890204] ? mas_walk+0x5c7/0x7c0 [ 38.890679] do_vmi_munmap+0x1f1/0x2b0 [ 38.891173] mmap_region+0x1f9/0x2660 [ 38.891655] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.892165] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.892919] ? __pfx_lock_acquire+0x10/0x10 [ 38.893448] ? __pfx_mmap_region+0x10/0x10 [ 38.893974] ? security_mmap_addr+0x7d/0xa0 [ 38.894500] ? get_unmapped_area+0x1f5/0x3f0 [ 38.895052] do_mmap+0x854/0xf00 [ 38.895489] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.895986] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.896589] ksys_mmap_pgoff+0x3af/0x500 [ 38.897103] do_syscall_64+0x3f/0x90 [ 38.897584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.898233] RIP: 0033:0x7f532e3ced82 [ 38.898693] 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 [ 38.900826] RSP: 002b:00007ffe1a09b458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.901728] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f532e3ced82 [ 38.902575] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f532d808000 [ 38.903421] RBP: 00007f532d808000 R08: 0000000000000009 R09: 0000000000001000 [ 38.904272] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a45bda6ec0 [ 38.905148] R13: 00007ffe1a09b470 R14: 00007ffe1a09b4a0 R15: 00007ffe1a09b800 [ 38.906004] [ 38.906299] [ 38.906514] Allocated by task 213: [ 38.906946] kasan_save_stack+0x22/0x50 [ 38.907453] kasan_set_track+0x25/0x30 [ 38.907943] __kasan_slab_alloc+0x59/0x70 [ 38.908503] kmem_cache_alloc+0x16b/0x370 [ 38.909022] vm_area_dup+0x20/0x160 [ 38.909490] __split_vma+0x170/0x950 [ 38.909956] split_vma+0xc6/0x110 [ 38.910394] mprotect_fixup+0x8d2/0xb30 [ 38.910899] do_mprotect_pkey+0x87e/0xd40 [ 38.911419] __x64_sys_mprotect+0x78/0xc0 [ 38.911940] do_syscall_64+0x3f/0x90 [ 38.912443] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.913077] [ 38.913294] Freed by task 213: [ 38.913684] kasan_save_stack+0x22/0x50 [ 38.914188] kasan_set_track+0x25/0x30 [ 38.914677] kasan_save_free_info+0x2b/0x50 [ 38.915207] __kasan_slab_free+0x10a/0x190 [ 38.915734] kmem_cache_free+0x10d/0x4d0 [ 38.916242] rcu_core+0x8c8/0x2860 [ 38.916723] __do_softirq+0x1b7/0x7d4 [ 38.917198] [ 38.917414] Last potentially related work creation: [ 38.918006] kasan_save_stack+0x22/0x50 [ 38.918507] __kasan_record_aux_stack+0x8e/0xa0 [ 38.919079] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.919713] remove_vma+0x139/0x170 [ 38.920163] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.920757] do_vmi_munmap+0x1f1/0x2b0 [ 38.921240] __vm_munmap+0x138/0x3a0 [ 38.921706] __x64_sys_munmap+0x59/0x80 [ 38.922200] do_syscall_64+0x3f/0x90 [ 38.922674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.923310] [ 38.923527] The buggy address belongs to the object at ffff88800e65e740 [ 38.923527] which belongs to the cache vm_area_struct of size 168 [ 38.925010] The buggy address is located 88 bytes inside of [ 38.925010] freed 168-byte region [ffff88800e65e740, ffff88800e65e7e8) [ 38.926399] [ 38.926619] The buggy address belongs to the physical page: [ 38.927273] page:00000000f6eb0bb4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe65e [ 38.928405] memcg:ffff88800ec56c01 [ 38.928832] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.929543] page_type: 0xffffffff() [ 38.929997] raw: 0100000000000200 ffff8880087a0c80 ffffea000039ef40 dead000000000005 [ 38.930934] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec56c01 [ 38.931860] page dumped because: kasan: bad access detected [ 38.932555] [ 38.932775] Memory state around the buggy address: [ 38.933358] ffff88800e65e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.934212] ffff88800e65e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.935081] >ffff88800e65e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.935934] ^ [ 38.936467] ffff88800e65e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.937329] ffff88800e65e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.938179] ================================================================== [ 38.939312] Disabling lock debugging due to kernel taint [ 40.839214] BUG: Bad rss-counter state mm:00000000ed744c4e type:MM_FILEPAGES val:33 [ 40.840870] BUG: Bad rss-counter state mm:00000000ed744c4e type:MM_ANONPAGES val:22 [ 41.385748] BUG: Bad rss-counter state mm:00000000d6447707 type:MM_FILEPAGES val:33 [ 41.386717] BUG: Bad rss-counter state mm:00000000d6447707 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62837' (ECDSA) to the list of known hosts. 2023/06/21 03:40:07 fuzzer started 2023/06/21 03:40:08 dialing manager at localhost:36067 2023/06/21 03:40:08 checking machine... 2023/06/21 03:40:08 checking revisions... [ 42.025076] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:40:08 testing simple program... [ 42.078874] cgroup: Unknown subsys name 'net' [ 42.125493] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:40:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81b2af8a RDX=dffffc0000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff888015e36fa8 RSP=ffff888014797728 R8 =0000000000000005 R9 =0000000000000097 R10=00000000000000a0 R11=00000000000b6d53 R12=ffff88801001c100 R13=ffff888015e36d38 R14=ffff888015e36d48 R15=0000000000000000 RIP=ffffffff814c0408 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7968c0a900 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=00007f79680b0098 CR3=000000000dbbc000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=bf7fb7139b29107b00000000000ae988 XMM05=ff8b08fbc122f41100000000001324b8 XMM06=fc546463c4c01c9d0000000000130ee8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000821 RBX=0000000000000620 RCX=0000562305751010 RDX=000000000001fab0 RSI=0000000000000000 RDI=00007f01dcdf2b80 RBP=00007f01dcdf2b80 RSP=00007ffe024749c0 R8 =000056230579bf58 R9 =000056230579a870 R10=00007ffe02473af4 R11=0000000000000202 R12=000056230579a860 R13=000056230579ae80 R14=0000000000000820 R15=000056230579bf40 RIP=00007f01dccbab2d RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f01dc840900 00000000 00000000 GS =0000 0000000000000000 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=00007f01dcdf7618 CR3=0000000016758000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000