syzkaller login: [ 31.742330] BUG: Bad rss-counter state mm:000000008db70513 type:MM_FILEPAGES val:33 [ 31.743501] BUG: Bad rss-counter state mm:000000008db70513 type:MM_ANONPAGES val:22 [ 31.900414] ================================================================== [ 31.901390] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.902384] Read of size 8 at addr ffff88800fe45d08 by task sshd/220 [ 31.903205] [ 31.903437] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.904521] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.905540] Call Trace: [ 31.905882] [ 31.906276] dump_stack_lvl+0x91/0xf0 [ 31.906908] print_report+0xcc/0x620 [ 31.907512] ? __virt_addr_valid+0x102/0x340 [ 31.908196] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.908965] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.909713] kasan_report+0xbe/0xf0 [ 31.910267] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.911013] vma_interval_tree_remove+0xc75/0xec0 [ 31.911613] vma_prepare+0xc54/0x11a0 [ 31.912090] __split_vma+0x5af/0x950 [ 31.912569] ? __pfx___split_vma+0x10/0x10 [ 31.913105] ? find_held_lock+0x2c/0x110 [ 31.913632] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.914200] ? lock_is_held_type+0x9f/0x120 [ 31.914741] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.915358] ? mtree_range_walk+0x632/0x900 [ 31.915910] ? mas_walk+0x5c7/0x7c0 [ 31.916378] do_vmi_munmap+0x1f1/0x2b0 [ 31.916877] mmap_region+0x1f9/0x2660 [ 31.917365] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.917876] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.918593] ? __pfx_lock_acquire+0x10/0x10 [ 31.919141] ? __pfx_mmap_region+0x10/0x10 [ 31.919680] ? security_mmap_addr+0x7d/0xa0 [ 31.920212] ? get_unmapped_area+0x1f5/0x3f0 [ 31.920766] do_mmap+0x854/0xf00 [ 31.921210] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.921715] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.922275] ksys_mmap_pgoff+0x3af/0x500 [ 31.922816] do_syscall_64+0x3f/0x90 [ 31.923294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.923947] RIP: 0033:0x7f8ae4efed82 [ 31.924403] 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 [ 31.926524] RSP: 002b:00007fff166a6908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.927444] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ae4efed82 [ 31.928283] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ae4338000 [ 31.929128] RBP: 00007f8ae4338000 R08: 0000000000000009 R09: 0000000000001000 [ 31.929974] R10: 0000000000000812 R11: 0000000000000206 R12: 000056476969dec0 [ 31.930851] R13: 00007fff166a6920 R14: 00007fff166a6950 R15: 00007fff166a6cb0 [ 31.931713] [ 31.932006] [ 31.932223] Allocated by task 213: [ 31.932656] kasan_save_stack+0x22/0x50 [ 31.933158] kasan_set_track+0x25/0x30 [ 31.933655] __kasan_slab_alloc+0x59/0x70 [ 31.934181] kmem_cache_alloc+0x16b/0x370 [ 31.934697] vm_area_dup+0x20/0x160 [ 31.935168] __split_vma+0x170/0x950 [ 31.935631] split_vma+0xc6/0x110 [ 31.936074] mprotect_fixup+0x8d2/0xb30 [ 31.936572] do_mprotect_pkey+0x87e/0xd40 [ 31.937095] __x64_sys_mprotect+0x78/0xc0 [ 31.937614] do_syscall_64+0x3f/0x90 [ 31.938089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.938733] [ 31.938955] Freed by task 202: [ 31.939345] kasan_save_stack+0x22/0x50 [ 31.939849] kasan_set_track+0x25/0x30 [ 31.940343] kasan_save_free_info+0x2b/0x50 [ 31.940881] __kasan_slab_free+0x10a/0x190 [ 31.941417] kmem_cache_free+0x10d/0x4d0 [ 31.941924] rcu_core+0x8c8/0x2860 [ 31.942402] __do_softirq+0x1b7/0x7d4 [ 31.942927] [ 31.943143] Last potentially related work creation: [ 31.943726] kasan_save_stack+0x22/0x50 [ 31.944233] __kasan_record_aux_stack+0x8e/0xa0 [ 31.944863] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.945521] remove_vma+0x139/0x170 [ 31.945974] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.946537] do_vmi_munmap+0x1f1/0x2b0 [ 31.947042] __vm_munmap+0x138/0x3a0 [ 31.947516] __x64_sys_munmap+0x59/0x80 [ 31.948010] do_syscall_64+0x3f/0x90 [ 31.948484] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.949128] [ 31.949341] The buggy address belongs to the object at ffff88800fe45cb0 [ 31.949341] which belongs to the cache vm_area_struct of size 168 [ 31.950814] The buggy address is located 88 bytes inside of [ 31.950814] freed 168-byte region [ffff88800fe45cb0, ffff88800fe45d58) [ 31.952213] [ 31.952428] The buggy address belongs to the physical page: [ 31.953086] page:000000002713c625 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe45 [ 31.954176] memcg:ffff888016bd8c01 [ 31.954609] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.955287] page_type: 0xffffffff() [ 31.955739] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.956667] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016bd8c01 [ 31.957579] page dumped because: kasan: bad access detected [ 31.958242] [ 31.958457] Memory state around the buggy address: [ 31.959048] ffff88800fe45c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.959896] ffff88800fe45c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.960757] >ffff88800fe45d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.961618] ^ [ 31.962055] ffff88800fe45d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.962920] ffff88800fe45e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.963786] ================================================================== [ 31.964783] Disabling lock debugging due to kernel taint [ 34.491029] BUG: Bad rss-counter state mm:0000000030fe4827 type:MM_FILEPAGES val:33 [ 34.492176] BUG: Bad rss-counter state mm:0000000030fe4827 type:MM_ANONPAGES val:22 [ 34.896779] BUG: Bad rss-counter state mm:0000000041c11f7e type:MM_FILEPAGES val:33 [ 34.897777] BUG: Bad rss-counter state mm:0000000041c11f7e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21610' (ECDSA) to the list of known hosts. 2023/06/19 21:52:38 fuzzer started 2023/06/19 21:52:38 dialing manager at localhost:44161 2023/06/19 21:52:38 checking machine... 2023/06/19 21:52:38 checking revisions... [ 35.620436] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:52:38 testing simple program... [ 35.676525] cgroup: Unknown subsys name 'net' [ 35.730503] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:52:36 Registers: info registers vcpu 0 RAX=ffffffff85d3bed0 RBX=ffff88800f7a32f8 RCX=ffffffff813bb65f RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff888018f8fd08 R8 =ffffffff87f92660 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=ffffffff84d30740 R14=ffffffff87f92660 R15=0000000000000000 RIP=ffffffff8180eeb2 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 00007f4e55fda900 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=00007f4e565920b0 CR3=000000000c61a000 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=00007f732acefb60 CR3=0000000008ee8000 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=20f03a10a7311fa2524130c79c57fd36 XMM02=2c67c8bc2e329bc3000000000011cfc8 XMM03=fb795ef6d65770560000000000124488 XMM04=59abbc5f84398a4100000000000ae988 XMM05=19e9129bd510f2350000000000133f68 XMM06=b57ada9b40f891ff0000000000132dd0 XMM07=e042d86d42eb936e0000000000124708 XMM08=1642324d7aaa0775000000000011d028 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000