syzkaller login: [ 32.271405] BUG: Bad rss-counter state mm:000000004cd84404 type:MM_FILEPAGES val:33 [ 32.273331] BUG: Bad rss-counter state mm:000000004cd84404 type:MM_ANONPAGES val:22 [ 32.436951] ================================================================== [ 32.438040] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.439175] Read of size 8 at addr ffff888019e5a058 by task sshd/220 [ 32.440220] [ 32.440475] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.441528] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.442727] Call Trace: [ 32.443110] [ 32.443446] dump_stack_lvl+0x91/0xf0 [ 32.444039] print_report+0xcc/0x620 [ 32.444623] ? __virt_addr_valid+0x102/0x340 [ 32.445286] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.445978] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.446560] kasan_report+0xbe/0xf0 [ 32.447013] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.447599] vma_interval_tree_remove+0xc75/0xec0 [ 32.448199] vma_prepare+0xc54/0x11a0 [ 32.448651] __split_vma+0x5af/0x950 [ 32.449097] ? __pfx___split_vma+0x10/0x10 [ 32.449594] ? find_held_lock+0x2c/0x110 [ 32.450088] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.450619] ? lock_is_held_type+0x9f/0x120 [ 32.451131] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.451704] ? mtree_range_walk+0x632/0x900 [ 32.452232] ? mas_walk+0x5c7/0x7c0 [ 32.452682] do_vmi_munmap+0x1f1/0x2b0 [ 32.453149] mmap_region+0x1f9/0x2660 [ 32.453607] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.454093] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.454778] ? __pfx_lock_acquire+0x10/0x10 [ 32.455284] ? __pfx_mmap_region+0x10/0x10 [ 32.455793] ? security_mmap_addr+0x7d/0xa0 [ 32.456301] ? get_unmapped_area+0x1f5/0x3f0 [ 32.456828] do_mmap+0x854/0xf00 [ 32.457248] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.457717] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.458252] ksys_mmap_pgoff+0x3af/0x500 [ 32.458740] do_syscall_64+0x3f/0x90 [ 32.459204] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.459824] RIP: 0033:0x7fd23473cd82 [ 32.460280] 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 [ 32.462280] RSP: 002b:00007fff8d34f9c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.463139] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd23473cd82 [ 32.463947] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd233b76000 [ 32.464758] RBP: 00007fd233b76000 R08: 0000000000000009 R09: 0000000000001000 [ 32.465558] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d6d68cdf70 [ 32.466407] R13: 00007fff8d34f9e0 R14: 00007fff8d34fa10 R15: 00007fff8d34fd70 [ 32.467259] [ 32.467549] [ 32.467770] Allocated by task 213: [ 32.468209] kasan_save_stack+0x22/0x50 [ 32.468718] kasan_set_track+0x25/0x30 [ 32.469208] __kasan_slab_alloc+0x59/0x70 [ 32.469725] kmem_cache_alloc+0x16b/0x370 [ 32.470243] vm_area_dup+0x20/0x160 [ 32.470696] __split_vma+0x170/0x950 [ 32.471156] split_vma+0xc6/0x110 [ 32.471598] mprotect_fixup+0x8d2/0xb30 [ 32.472108] do_mprotect_pkey+0x87e/0xd40 [ 32.472619] __x64_sys_mprotect+0x78/0xc0 [ 32.473136] do_syscall_64+0x3f/0x90 [ 32.473595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.474219] [ 32.474431] Freed by task 203: [ 32.474823] kasan_save_stack+0x22/0x50 [ 32.475315] kasan_set_track+0x25/0x30 [ 32.475802] kasan_save_free_info+0x2b/0x50 [ 32.476337] __kasan_slab_free+0x10a/0x190 [ 32.476875] kmem_cache_free+0x10d/0x4d0 [ 32.477389] rcu_core+0x8c8/0x2860 [ 32.477838] __do_softirq+0x1b7/0x7d4 [ 32.478310] [ 32.478526] Last potentially related work creation: [ 32.479111] kasan_save_stack+0x22/0x50 [ 32.479607] __kasan_record_aux_stack+0x8e/0xa0 [ 32.480196] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.480827] remove_vma+0x139/0x170 [ 32.481276] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.481825] do_vmi_munmap+0x1f1/0x2b0 [ 32.482300] __vm_munmap+0x138/0x3a0 [ 32.482773] __x64_sys_munmap+0x59/0x80 [ 32.483252] do_syscall_64+0x3f/0x90 [ 32.483713] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.484363] [ 32.484577] The buggy address belongs to the object at ffff888019e5a000 [ 32.484577] which belongs to the cache vm_area_struct of size 168 [ 32.486037] The buggy address is located 88 bytes inside of [ 32.486037] freed 168-byte region [ffff888019e5a000, ffff888019e5a0a8) [ 32.487414] [ 32.487629] The buggy address belongs to the physical page: [ 32.488308] page:00000000467b92db refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e5a [ 32.489377] memcg:ffff888017e5c201 [ 32.489808] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.490457] page_type: 0xffffffff() [ 32.490910] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.491818] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017e5c201 [ 32.492736] page dumped because: kasan: bad access detected [ 32.493400] [ 32.493614] Memory state around the buggy address: [ 32.494195] ffff888019e59f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 32.495049] ffff888019e59f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.495894] >ffff888019e5a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.496738] ^ [ 32.497452] ffff888019e5a080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.498297] ffff888019e5a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.499139] ================================================================== [ 32.500121] Disabling lock debugging due to kernel taint [ 34.404761] BUG: Bad rss-counter state mm:00000000d68d9844 type:MM_FILEPAGES val:33 [ 34.405979] BUG: Bad rss-counter state mm:00000000d68d9844 type:MM_ANONPAGES val:22 [ 34.792076] BUG: Bad rss-counter state mm:0000000012587304 type:MM_FILEPAGES val:33 [ 34.793178] BUG: Bad rss-counter state mm:0000000012587304 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1855' (ECDSA) to the list of known hosts. 2023/06/19 17:36:11 fuzzer started 2023/06/19 17:36:11 dialing manager at localhost:44161 2023/06/19 17:36:11 checking machine... 2023/06/19 17:36:11 checking revisions... [ 35.489639] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:36:11 testing simple program... [ 35.534018] cgroup: Unknown subsys name 'net' [ 35.590304] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:36:09 Registers: info registers vcpu 0 RAX=ffff888006830001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800682fe01 RSI=ffff88800682fe48 RDI=ffff88800682f668 RBP=ffff88800682f6b0 RSP=ffff88800682f5d0 R8 =0000000000000001 R9 =ffff88800682f698 R10=0000000000038001 R11=000000000001dda2 R12=ffff88800682f6b8 R13=ffff888006828000 R14=ffff88800682fe48 R15=ffff88800682f658 RIP=ffffffff811304d1 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f62b9859900 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=00007f62b8d79000 CR3=000000000c4c6000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=98e67538e78c83ce00000000000ae988 XMM05=957b874b36fd708d0000000000134c28 XMM06=19e9129bd510f2350000000000133ac0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffd6b67c528 CR3=00000000100e4000 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=2031313a36333a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a36333a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000