syzkaller login: [ 30.748369] sshd (212) used greatest stack depth: 24128 bytes left [ 30.749726] BUG: Bad rss-counter state mm:0000000053d4919c type:MM_FILEPAGES val:33 [ 30.751532] BUG: Bad rss-counter state mm:0000000053d4919c type:MM_ANONPAGES val:22 [ 30.909543] ================================================================== [ 30.910670] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.911696] Read of size 8 at addr ffff888015aa3df0 by task sshd/219 [ 30.912645] [ 30.912874] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.913751] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.914763] Call Trace: [ 30.915084] [ 30.915375] dump_stack_lvl+0x91/0xf0 [ 30.915864] print_report+0xcc/0x620 [ 30.916352] ? __virt_addr_valid+0x102/0x340 [ 30.916911] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.917533] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.918160] kasan_report+0xbe/0xf0 [ 30.918659] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.919287] vma_interval_tree_remove+0xc75/0xec0 [ 30.919900] vma_prepare+0xc54/0x11a0 [ 30.920377] __split_vma+0x5af/0x950 [ 30.920855] ? __pfx___split_vma+0x10/0x10 [ 30.921386] ? find_held_lock+0x2c/0x110 [ 30.921906] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.922484] ? lock_is_held_type+0x9f/0x120 [ 30.923025] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.923638] ? mtree_range_walk+0x632/0x900 [ 30.924189] ? mas_walk+0x5c7/0x7c0 [ 30.924663] do_vmi_munmap+0x1f1/0x2b0 [ 30.925162] mmap_region+0x1f9/0x2660 [ 30.925645] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.926158] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.926874] ? __pfx_lock_acquire+0x10/0x10 [ 30.927408] ? __pfx_mmap_region+0x10/0x10 [ 30.927938] ? security_mmap_addr+0x7d/0xa0 [ 30.928466] ? get_unmapped_area+0x1f5/0x3f0 [ 30.929017] do_mmap+0x854/0xf00 [ 30.929462] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.929969] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.930562] ksys_mmap_pgoff+0x3af/0x500 [ 30.931083] do_syscall_64+0x3f/0x90 [ 30.931577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.932224] RIP: 0033:0x7f02eb0dad82 [ 30.932686] 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 [ 30.934826] RSP: 002b:00007fffb9084c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.935726] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f02eb0dad82 [ 30.936587] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f02ea514000 [ 30.937431] RBP: 00007f02ea514000 R08: 0000000000000009 R09: 0000000000001000 [ 30.938305] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563acf1e2ec0 [ 30.939165] R13: 00007fffb9084c90 R14: 00007fffb9084cc0 R15: 00007fffb9085020 [ 30.940038] [ 30.940331] [ 30.940549] Allocated by task 212: [ 30.940973] kasan_save_stack+0x22/0x50 [ 30.941490] kasan_set_track+0x25/0x30 [ 30.941989] __kasan_slab_alloc+0x59/0x70 [ 30.942532] kmem_cache_alloc+0x16b/0x370 [ 30.943049] vm_area_dup+0x20/0x160 [ 30.943504] __split_vma+0x170/0x950 [ 30.943969] split_vma+0xc6/0x110 [ 30.944418] mprotect_fixup+0x8d2/0xb30 [ 30.944927] do_mprotect_pkey+0x87e/0xd40 [ 30.945447] __x64_sys_mprotect+0x78/0xc0 [ 30.945966] do_syscall_64+0x3f/0x90 [ 30.946459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.947102] [ 30.947320] Freed by task 212: [ 30.947711] kasan_save_stack+0x22/0x50 [ 30.948216] kasan_set_track+0x25/0x30 [ 30.948712] kasan_save_free_info+0x2b/0x50 [ 30.949253] __kasan_slab_free+0x10a/0x190 [ 30.949789] kmem_cache_free+0x10d/0x4d0 [ 30.950318] rcu_core+0x8c8/0x2860 [ 30.950770] __do_softirq+0x1b7/0x7d4 [ 30.951246] [ 30.951460] Last potentially related work creation: [ 30.952044] kasan_save_stack+0x22/0x50 [ 30.952552] __kasan_record_aux_stack+0x8e/0xa0 [ 30.953135] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.953788] remove_vma+0x139/0x170 [ 30.954284] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.954857] do_vmi_munmap+0x1f1/0x2b0 [ 30.955360] __vm_munmap+0x138/0x3a0 [ 30.955830] __x64_sys_munmap+0x59/0x80 [ 30.956339] do_syscall_64+0x3f/0x90 [ 30.956816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.957470] [ 30.957684] The buggy address belongs to the object at ffff888015aa3d98 [ 30.957684] which belongs to the cache vm_area_struct of size 168 [ 30.959173] The buggy address is located 88 bytes inside of [ 30.959173] freed 168-byte region [ffff888015aa3d98, ffff888015aa3e40) [ 30.960575] [ 30.960792] The buggy address belongs to the physical page: [ 30.961452] page:00000000a092cf74 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15aa3 [ 30.962558] memcg:ffff8880159a6b01 [ 30.962982] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.963623] page_type: 0xffffffff() [ 30.964079] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.965012] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880159a6b01 [ 30.965916] page dumped because: kasan: bad access detected [ 30.966610] [ 30.966824] Memory state around the buggy address: [ 30.967425] ffff888015aa3c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.968281] ffff888015aa3d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.969155] >ffff888015aa3d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.970017] ^ [ 30.970849] ffff888015aa3e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.971726] ffff888015aa3e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.972596] ================================================================== [ 30.973540] Disabling lock debugging due to kernel taint [ 32.757496] BUG: Bad rss-counter state mm:00000000fd9b8ee8 type:MM_FILEPAGES val:33 [ 32.758233] BUG: Bad rss-counter state mm:00000000fd9b8ee8 type:MM_ANONPAGES val:22 [ 33.161329] BUG: Bad rss-counter state mm:00000000c315b41a type:MM_FILEPAGES val:33 [ 33.162025] BUG: Bad rss-counter state mm:00000000c315b41a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7186' (ECDSA) to the list of known hosts. 2023/06/20 20:03:50 fuzzer started 2023/06/20 20:03:50 dialing manager at localhost:36067 2023/06/20 20:03:50 checking machine... 2023/06/20 20:03:50 checking revisions... [ 33.828207] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:03:51 testing simple program... [ 33.875104] cgroup: Unknown subsys name 'net' [ 33.926002] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:03:50 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ffd444eb868 CR3=0000000013eca000 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=2030353a33303a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a33303a3032203032 XMM08=303d64696720303d64697520612f6e3d XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff83682786 RDX=ffff88800c7a3680 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800fddd3c0 RSP=ffff888018057998 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ff00545000000000 R12=ffffffff83867afd R13=ffff888018ae1700 R14=ffff888018057a88 R15=00000000000000e8 RIP=ffffffff814c0860 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 00007f90c41ea900 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=00007f90c47a1618 CR3=000000000f1fc000 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=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