syzkaller login: [ 51.679404] BUG: Bad rss-counter state mm:0000000006968fb1 type:MM_FILEPAGES val:33 [ 51.680777] BUG: Bad rss-counter state mm:0000000006968fb1 type:MM_ANONPAGES val:22 [ 51.847790] ================================================================== [ 51.848745] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.849734] Read of size 8 at addr ffff88800df7b880 by task sshd/220 [ 51.850540] [ 51.850887] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.851821] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.852841] Call Trace: [ 51.853192] <TASK> [ 51.853485] dump_stack_lvl+0x91/0xf0 [ 51.854045] print_report+0xcc/0x620 [ 51.854546] ? __virt_addr_valid+0x102/0x340 [ 51.855129] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.855793] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.856436] kasan_report+0xbe/0xf0 [ 51.856966] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.857652] vma_interval_tree_remove+0xc75/0xec0 [ 51.858267] vma_prepare+0xc54/0x11a0 [ 51.858755] __split_vma+0x5af/0x950 [ 51.859230] ? __pfx___split_vma+0x10/0x10 [ 51.859788] ? find_held_lock+0x2c/0x110 [ 51.860312] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.860895] ? lock_is_held_type+0x9f/0x120 [ 51.861440] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.862078] ? mtree_range_walk+0x632/0x900 [ 51.862646] ? mas_walk+0x5c7/0x7c0 [ 51.863123] do_vmi_munmap+0x1f1/0x2b0 [ 51.863655] mmap_region+0x1f9/0x2660 [ 51.864146] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.864686] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.865419] ? __pfx_lock_acquire+0x10/0x10 [ 51.865982] ? __pfx_mmap_region+0x10/0x10 [ 51.866518] ? security_mmap_addr+0x7d/0xa0 [ 51.867065] ? get_unmapped_area+0x1f5/0x3f0 [ 51.867641] do_mmap+0x854/0xf00 [ 51.868088] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.868581] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.869159] ksys_mmap_pgoff+0x3af/0x500 [ 51.869683] do_syscall_64+0x3f/0x90 [ 51.870164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.870810] RIP: 0033:0x7f3564c79d82 [ 51.871266] 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 [ 51.873400] RSP: 002b:00007ffd9a934a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.874315] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3564c79d82 [ 51.875166] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f35640b3000 [ 51.876034] RBP: 00007f35640b3000 R08: 0000000000000009 R09: 0000000000001000 [ 51.876875] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e2ac60ec0 [ 51.877727] R13: 00007ffd9a934a40 R14: 00007ffd9a934a70 R15: 00007ffd9a934dd0 [ 51.878577] </TASK> [ 51.878870] [ 51.879087] Allocated by task 213: [ 51.879517] kasan_save_stack+0x22/0x50 [ 51.880015] kasan_set_track+0x25/0x30 [ 51.880505] __kasan_slab_alloc+0x59/0x70 [ 51.881034] kmem_cache_alloc+0x16b/0x370 [ 51.881551] vm_area_dup+0x20/0x160 [ 51.882007] __split_vma+0x170/0x950 [ 51.882470] split_vma+0xc6/0x110 [ 51.882907] mprotect_fixup+0x8d2/0xb30 [ 51.883405] do_mprotect_pkey+0x87e/0xd40 [ 51.883946] __x64_sys_mprotect+0x78/0xc0 [ 51.884469] do_syscall_64+0x3f/0x90 [ 51.884940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.885572] [ 51.885787] Freed by task 213: [ 51.886177] kasan_save_stack+0x22/0x50 [ 51.886681] kasan_set_track+0x25/0x30 [ 51.887172] kasan_save_free_info+0x2b/0x50 [ 51.887709] __kasan_slab_free+0x10a/0x190 [ 51.888235] kmem_cache_free+0x10d/0x4d0 [ 51.888739] rcu_core+0x8c8/0x2860 [ 51.889177] __do_softirq+0x1b7/0x7d4 [ 51.889646] [ 51.889860] Last potentially related work creation: [ 51.890442] kasan_save_stack+0x22/0x50 [ 51.890943] __kasan_record_aux_stack+0x8e/0xa0 [ 51.891527] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.892231] remove_vma+0x139/0x170 [ 51.892679] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.893235] do_vmi_munmap+0x1f1/0x2b0 [ 51.893719] __vm_munmap+0x138/0x3a0 [ 51.894181] __x64_sys_munmap+0x59/0x80 [ 51.894674] do_syscall_64+0x3f/0x90 [ 51.895141] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.895797] [ 51.896011] The buggy address belongs to the object at ffff88800df7b828 [ 51.896011] which belongs to the cache vm_area_struct of size 168 [ 51.897470] The buggy address is located 88 bytes inside of [ 51.897470] freed 168-byte region [ffff88800df7b828, ffff88800df7b8d0) [ 51.898872] [ 51.899086] The buggy address belongs to the physical page: [ 51.899745] page:00000000aff13755 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf7b [ 51.900821] memcg:ffff8880144b5401 [ 51.901246] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.901883] page_type: 0xffffffff() [ 51.902330] raw: 0100000000000200 ffff88800879fc80 ffffea00003ad640 dead000000000002 [ 51.903235] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144b5401 [ 51.904143] page dumped because: kasan: bad access detected [ 51.904799] [ 51.905013] Memory state around the buggy address: [ 51.905587] ffff88800df7b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 51.906435] ffff88800df7b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 51.907326] >ffff88800df7b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 51.908194] ^ [ 51.908614] ffff88800df7b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.909482] ffff88800df7b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 51.910345] ================================================================== [ 51.911277] Disabling lock debugging due to kernel taint [ 53.850998] BUG: Bad rss-counter state mm:000000003bd226a7 type:MM_FILEPAGES val:33 [ 53.851960] BUG: Bad rss-counter state mm:000000003bd226a7 type:MM_ANONPAGES val:22 [ 54.397569] BUG: Bad rss-counter state mm:00000000fc84e007 type:MM_FILEPAGES val:33 [ 54.398719] BUG: Bad rss-counter state mm:00000000fc84e007 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17118' (ECDSA) to the list of known hosts. 2023/06/19 17:03:51 fuzzer started 2023/06/19 17:03:51 dialing manager at localhost:44161 2023/06/19 17:03:52 checking machine... 2023/06/19 17:03:52 checking revisions... [ 55.022480] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:03:52 testing simple program... [ 55.076887] cgroup: Unknown subsys name 'net' [ 55.166730] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:03:28 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100355bf40 RSI=ffff88801aadf9d0 RDI=ffff88801aadfa50 RBP=ffff88801aadfa98 RSP=ffff88801aadf940 R8 =0000000000000001 R9 =ffff88801aadfa40 R10=0000000000038001 R11=0000000000006097 R12=ffff88801aadfa60 R13=ffff88801aadfa48 R14=ffff88801aadf9d0 R15=ffff88801aadfa00 RIP=ffffffff81131280 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8403942900 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=00007ffe660f0000 CR3=000000000f0b8000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007fe860bc6d70 CR3=000000000d78c000 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=2031353a33303a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a33303a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000