syzkaller login: [ 35.881673] BUG: Bad rss-counter state mm:00000000e15873e2 type:MM_FILEPAGES val:33 [ 35.882978] BUG: Bad rss-counter state mm:00000000e15873e2 type:MM_ANONPAGES val:22 [ 35.920430] ================================================================== [ 35.921592] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.922816] Read of size 8 at addr ffff88801a3c36b0 by task sshd/221 [ 35.923913] [ 35.924184] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.925292] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.926585] Call Trace: [ 35.927045] [ 35.927421] dump_stack_lvl+0x91/0xf0 [ 35.928047] print_report+0xcc/0x620 [ 35.928694] ? __virt_addr_valid+0x102/0x340 [ 35.929351] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.930217] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.930851] kasan_report+0xbe/0xf0 [ 35.931341] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.931968] vma_interval_tree_remove+0xc75/0xec0 [ 35.932719] vma_prepare+0xc54/0x11a0 [ 35.933206] __split_vma+0x5af/0x950 [ 35.933762] ? __pfx___split_vma+0x10/0x10 [ 35.934377] ? find_held_lock+0x2c/0x110 [ 35.934920] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.935571] ? lock_is_held_type+0x9f/0x120 [ 35.936187] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.936910] ? mtree_range_walk+0x632/0x900 [ 35.937516] ? mas_walk+0x5c7/0x7c0 [ 35.937989] do_vmi_munmap+0x1f1/0x2b0 [ 35.938490] mmap_region+0x1f9/0x2660 [ 35.938998] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.939551] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.940271] ? __pfx_lock_acquire+0x10/0x10 [ 35.940817] ? __pfx_mmap_region+0x10/0x10 [ 35.941349] ? security_mmap_addr+0x7d/0xa0 [ 35.941882] ? get_unmapped_area+0x1f5/0x3f0 [ 35.942431] do_mmap+0x854/0xf00 [ 35.942875] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.943388] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.943952] ksys_mmap_pgoff+0x3af/0x500 [ 35.944458] do_syscall_64+0x3f/0x90 [ 35.944937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.945580] RIP: 0033:0x7f18fb488d82 [ 35.946038] 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 [ 35.948198] RSP: 002b:00007ffda080cf48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.949106] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f18fb488d82 [ 35.949964] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f18fa8c2000 [ 35.950812] RBP: 00007f18fa8c2000 R08: 0000000000000009 R09: 0000000000001000 [ 35.951682] R10: 0000000000000812 R11: 0000000000000206 R12: 00005598d76f6b20 [ 35.952528] R13: 00007ffda080cf60 R14: 00007ffda080cf90 R15: 00007ffda080d2f0 [ 35.953389] [ 35.953677] [ 35.953891] Allocated by task 214: [ 35.954328] kasan_save_stack+0x22/0x50 [ 35.954841] kasan_set_track+0x25/0x30 [ 35.955368] __kasan_slab_alloc+0x59/0x70 [ 35.955903] kmem_cache_alloc+0x16b/0x370 [ 35.956420] vm_area_dup+0x20/0x160 [ 35.956873] __split_vma+0x170/0x950 [ 35.957338] split_vma+0xc6/0x110 [ 35.957783] mprotect_fixup+0x8d2/0xb30 [ 35.958292] do_mprotect_pkey+0x87e/0xd40 [ 35.958831] __x64_sys_mprotect+0x78/0xc0 [ 35.959378] do_syscall_64+0x3f/0x90 [ 35.959860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.960513] [ 35.960727] Freed by task 214: [ 35.961127] kasan_save_stack+0x22/0x50 [ 35.961641] kasan_set_track+0x25/0x30 [ 35.962139] kasan_save_free_info+0x2b/0x50 [ 35.962672] __kasan_slab_free+0x10a/0x190 [ 35.963212] kmem_cache_free+0x10d/0x4d0 [ 35.963736] rcu_core+0x8c8/0x2860 [ 35.964183] __do_softirq+0x1b7/0x7d4 [ 35.964668] [ 35.964885] Last potentially related work creation: [ 35.965532] kasan_save_stack+0x22/0x50 [ 35.966040] __kasan_record_aux_stack+0x8e/0xa0 [ 35.966615] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.967278] remove_vma+0x139/0x170 [ 35.967739] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.968310] do_vmi_munmap+0x1f1/0x2b0 [ 35.968801] __vm_munmap+0x138/0x3a0 [ 35.969272] __x64_sys_munmap+0x59/0x80 [ 35.969766] do_syscall_64+0x3f/0x90 [ 35.970243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.970897] [ 35.971120] The buggy address belongs to the object at ffff88801a3c3658 [ 35.971120] which belongs to the cache vm_area_struct of size 168 [ 35.972602] The buggy address is located 88 bytes inside of [ 35.972602] freed 168-byte region [ffff88801a3c3658, ffff88801a3c3700) [ 35.974010] [ 35.974230] The buggy address belongs to the physical page: [ 35.974923] page:000000001d1c9710 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3c3 [ 35.976041] memcg:ffff88800ecd4701 [ 35.976475] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.977123] page_type: 0xffffffff() [ 35.977580] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.978504] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecd4701 [ 35.979444] page dumped because: kasan: bad access detected [ 35.980131] [ 35.980344] Memory state around the buggy address: [ 35.980931] ffff88801a3c3580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.981787] ffff88801a3c3600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 35.982646] >ffff88801a3c3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.983515] ^ [ 35.984092] ffff88801a3c3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.984967] ffff88801a3c3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.985823] ================================================================== [ 35.986818] Disabling lock debugging due to kernel taint [ 37.873944] BUG: Bad rss-counter state mm:00000000c8af3f6b type:MM_FILEPAGES val:33 [ 37.874982] BUG: Bad rss-counter state mm:00000000c8af3f6b type:MM_ANONPAGES val:22 [ 38.353923] BUG: Bad rss-counter state mm:000000006059e6d5 type:MM_FILEPAGES val:33 [ 38.355097] BUG: Bad rss-counter state mm:000000006059e6d5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13626' (ECDSA) to the list of known hosts. 2023/06/19 13:59:57 fuzzer started 2023/06/19 13:59:57 dialing manager at localhost:44161 2023/06/19 13:59:57 checking machine... 2023/06/19 13:59:57 checking revisions... [ 39.040009] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:59:57 testing simple program... [ 39.089277] cgroup: Unknown subsys name 'net' [ 39.148745] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:59:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000025 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000025 RSP=ffff888016dd7a80 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff888016dd7d68 R13=0000000000000001 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff812d9011 RFL=00000286 [--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 00007fe199bf9900 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=00007fe19a1b10b0 CR3=000000000e4b6000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f44f1f40f50 CR3=0000000013682000 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=c527e862729a48b5904b3caa579d67db XMM02=000000000011fa38ec2efd57dc4c00df XMM03=0000000000124100dfb482c306acd420 XMM04=bc0e640dd806619400000000000ae988 XMM05=e4cb8bb95a7664b60000000000133bf0 XMM06=35c971c54d3df4150000000000132a58 XMM07=e042d86d42eb936e0000000000124380 XMM08=dfb482c306acd420000000000011fa98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000