syzkaller login: [ 30.747192] BUG: Bad rss-counter state mm:00000000837e343e type:MM_FILEPAGES val:33 [ 30.749256] BUG: Bad rss-counter state mm:00000000837e343e type:MM_ANONPAGES val:22 [ 30.911530] ================================================================== [ 30.912131] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.912740] Read of size 8 at addr ffff888019d455c8 by task sshd/223 [ 30.913248] [ 30.913524] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.914137] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.914756] Call Trace: [ 30.915820] [ 30.916071] dump_stack_lvl+0x91/0xf0 [ 30.916401] print_report+0xcc/0x620 [ 30.916728] ? __virt_addr_valid+0x102/0x340 [ 30.917158] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.917737] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.918199] kasan_report+0xbe/0xf0 [ 30.918510] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.918973] vma_interval_tree_remove+0xc75/0xec0 [ 30.919375] vma_prepare+0xc54/0x11a0 [ 30.919694] __split_vma+0x5af/0x950 [ 30.920066] ? __pfx___split_vma+0x10/0x10 [ 30.920417] ? find_held_lock+0x2c/0x110 [ 30.920768] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.921213] ? lock_is_held_type+0x9f/0x120 [ 30.921614] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.922075] ? mtree_range_walk+0x632/0x900 [ 30.922449] ? mas_walk+0x5c7/0x7c0 [ 30.922763] do_vmi_munmap+0x1f1/0x2b0 [ 30.923147] mmap_region+0x1f9/0x2660 [ 30.923469] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.923809] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.924330] ? __pfx_lock_acquire+0x10/0x10 [ 30.924692] ? __pfx_mmap_region+0x10/0x10 [ 30.925104] ? security_mmap_addr+0x7d/0xa0 [ 30.925474] ? get_unmapped_area+0x1f5/0x3f0 [ 30.925842] do_mmap+0x854/0xf00 [ 30.926199] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.926534] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.926964] ksys_mmap_pgoff+0x3af/0x500 [ 30.927300] do_syscall_64+0x3f/0x90 [ 30.927624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.928111] RIP: 0033:0x7fa51f0b4d82 [ 30.928416] 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 [ 30.929878] RSP: 002b:00007fffab83b7c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.930538] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa51f0b4d82 [ 30.931162] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa51e4ee000 [ 30.931720] RBP: 00007fa51e4ee000 R08: 0000000000000009 R09: 0000000000001000 [ 30.932336] R10: 0000000000000812 R11: 0000000000000206 R12: 000055583d622d90 [ 30.932950] R13: 00007fffab83b7e0 R14: 00007fffab83b810 R15: 00007fffab83bb70 [ 30.933509] [ 30.933682] [ 30.933809] Allocated by task 214: [ 30.934147] kasan_save_stack+0x22/0x50 [ 30.934491] kasan_set_track+0x25/0x30 [ 30.934825] __kasan_slab_alloc+0x59/0x70 [ 30.935233] kmem_cache_alloc+0x16b/0x370 [ 30.935580] vm_area_dup+0x20/0x160 [ 30.935884] __split_vma+0x170/0x950 [ 30.936264] split_vma+0xc6/0x110 [ 30.936563] mprotect_fixup+0x8d2/0xb30 [ 30.936956] do_mprotect_pkey+0x87e/0xd40 [ 30.937323] __x64_sys_mprotect+0x78/0xc0 [ 30.937661] do_syscall_64+0x3f/0x90 [ 30.938016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.938423] [ 30.938568] Freed by task 13: [ 30.938824] kasan_save_stack+0x22/0x50 [ 30.939230] kasan_set_track+0x25/0x30 [ 30.939565] kasan_save_free_info+0x2b/0x50 [ 30.939980] __kasan_slab_free+0x10a/0x190 [ 30.940332] kmem_cache_free+0x10d/0x4d0 [ 30.940670] rcu_core+0x8c8/0x2860 [ 30.941032] __do_softirq+0x1b7/0x7d4 [ 30.941366] [ 30.941522] Last potentially related work creation: [ 30.941966] kasan_save_stack+0x22/0x50 [ 30.942303] __kasan_record_aux_stack+0x8e/0xa0 [ 30.942677] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.943168] remove_vma+0x139/0x170 [ 30.943470] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.943840] do_vmi_munmap+0x1f1/0x2b0 [ 30.944217] __vm_munmap+0x138/0x3a0 [ 30.944527] __x64_sys_munmap+0x59/0x80 [ 30.944850] do_syscall_64+0x3f/0x90 [ 30.945230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.945671] [ 30.945812] The buggy address belongs to the object at ffff888019d45570 [ 30.945812] which belongs to the cache vm_area_struct of size 168 [ 30.946812] The buggy address is located 88 bytes inside of [ 30.946812] freed 168-byte region [ffff888019d45570, ffff888019d45618) [ 30.947781] [ 30.947982] The buggy address belongs to the physical page: [ 30.948414] page:00000000f892c90e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d45 [ 30.949176] memcg:ffff88800ec30b01 [ 30.949476] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.949952] page_type: 0xffffffff() [ 30.950253] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.950848] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec30b01 [ 30.951498] page dumped because: kasan: bad access detected [ 30.951992] [ 30.952128] Memory state around the buggy address: [ 30.952490] ffff888019d45480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.953100] ffff888019d45500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.953674] >ffff888019d45580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.954281] ^ [ 30.954715] ffff888019d45600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.955346] ffff888019d45680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.955897] ================================================================== [ 30.973392] Disabling lock debugging due to kernel taint [ 36.985464] BUG: Bad rss-counter state mm:0000000033f86be6 type:MM_FILEPAGES val:33 [ 36.986168] BUG: Bad rss-counter state mm:0000000033f86be6 type:MM_ANONPAGES val:22 [ 37.591617] BUG: Bad rss-counter state mm:00000000d9099a1f type:MM_FILEPAGES val:33 [ 37.592386] BUG: Bad rss-counter state mm:00000000d9099a1f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9082' (ECDSA) to the list of known hosts. 2023/06/21 10:19:00 fuzzer started 2023/06/21 10:19:00 dialing manager at localhost:36067 2023/06/21 10:19:00 checking machine... 2023/06/21 10:19:00 checking revisions... [ 38.406538] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:19:00 testing simple program... [ 38.443351] cgroup: Unknown subsys name 'net' [ 38.504178] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:19:00 Registers: info registers vcpu 0 RAX=0000000000000039 RBX=00000000000003f8 RCX=0000000000000000 RDX=00000000000003f8 RSI=ffffffff825054a5 RDI=ffffffff87f6f0a0 RBP=ffffffff87f6f060 RSP=ffff88801584f980 R8 =0000000000000001 R9 =000000000000000a R10=0000000000000039 R11=000000003a475542 R12=0000000000000039 R13=ffffffff87f6f060 R14=0000000000000010 R15=ffffffff82505490 RIP=ffffffff825054fd RFL=00000202 [-------] 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 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=0000555c0613c000 CR3=0000000016b6a000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000777074 XMM04=00007fcdd39b1c71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=000000000000726f7475636578652d7a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88800fff77d8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff88806cf361a0 R15=0000000000000000 RIP=ffffffff8135b960 RFL=00000016 [----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 00007f3b64ecd900 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=00007fbca27a4410 CR3=00000000164b6000 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=2039353a38313a3031203132206e754a XMM01=5d3638333239352e37332020205b203a XMM02=415f4d4d3a6570797420663161393930 XMM03=617473207265746e756f632d73737220 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a38313a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000