syzkaller login: [ 51.436074] BUG: Bad rss-counter state mm:00000000fa46e824 type:MM_FILEPAGES val:33 [ 51.437394] BUG: Bad rss-counter state mm:00000000fa46e824 type:MM_ANONPAGES val:22 [ 51.601455] ================================================================== [ 51.602388] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.603336] Read of size 8 at addr ffff88800d816a50 by task sshd/219 [ 51.604121] [ 51.604348] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.605348] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.606368] Call Trace: [ 51.606698] [ 51.607006] dump_stack_lvl+0x91/0xf0 [ 51.607503] print_report+0xcc/0x620 [ 51.607997] ? __virt_addr_valid+0x102/0x340 [ 51.608560] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.609195] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.609838] kasan_report+0xbe/0xf0 [ 51.610332] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.610969] vma_interval_tree_remove+0xc75/0xec0 [ 51.611590] vma_prepare+0xc54/0x11a0 [ 51.612082] __split_vma+0x5af/0x950 [ 51.612563] ? __pfx___split_vma+0x10/0x10 [ 51.613106] ? find_held_lock+0x2c/0x110 [ 51.613648] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.614230] ? lock_is_held_type+0x9f/0x120 [ 51.614784] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.615403] ? mtree_range_walk+0x632/0x900 [ 51.615969] ? mas_walk+0x5c7/0x7c0 [ 51.616455] do_vmi_munmap+0x1f1/0x2b0 [ 51.616960] mmap_region+0x1f9/0x2660 [ 51.617472] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.617992] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.618724] ? __pfx_lock_acquire+0x10/0x10 [ 51.619271] ? __pfx_mmap_region+0x10/0x10 [ 51.619819] ? security_mmap_addr+0x7d/0xa0 [ 51.620365] ? get_unmapped_area+0x1f5/0x3f0 [ 51.620935] do_mmap+0x854/0xf00 [ 51.621387] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.621897] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.622469] ksys_mmap_pgoff+0x3af/0x500 [ 51.622997] do_syscall_64+0x3f/0x90 [ 51.623482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.624145] RIP: 0033:0x7f9b1e883d82 [ 51.624615] 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 [ 51.626798] RSP: 002b:00007fff9e511268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.627721] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9b1e883d82 [ 51.628585] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9b1dcbd000 [ 51.629464] RBP: 00007f9b1dcbd000 R08: 0000000000000009 R09: 0000000000001000 [ 51.630327] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561d63fb9ec0 [ 51.631189] R13: 00007fff9e511280 R14: 00007fff9e5112b0 R15: 00007fff9e511610 [ 51.632058] [ 51.632353] [ 51.632574] Allocated by task 212: [ 51.633015] kasan_save_stack+0x22/0x50 [ 51.633539] kasan_set_track+0x25/0x30 [ 51.634025] __kasan_slab_alloc+0x59/0x70 [ 51.634545] kmem_cache_alloc+0x16b/0x370 [ 51.635069] vm_area_dup+0x20/0x160 [ 51.635522] __split_vma+0x170/0x950 [ 51.635990] split_vma+0xc6/0x110 [ 51.636426] mprotect_fixup+0x8d2/0xb30 [ 51.636926] do_mprotect_pkey+0x87e/0xd40 [ 51.637459] __x64_sys_mprotect+0x78/0xc0 [ 51.637980] do_syscall_64+0x3f/0x90 [ 51.638454] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.639094] [ 51.639310] Freed by task 212: [ 51.639699] kasan_save_stack+0x22/0x50 [ 51.640201] kasan_set_track+0x25/0x30 [ 51.640693] kasan_save_free_info+0x2b/0x50 [ 51.641224] __kasan_slab_free+0x10a/0x190 [ 51.641762] kmem_cache_free+0x10d/0x4d0 [ 51.642268] rcu_core+0x8c8/0x2860 [ 51.642713] __do_softirq+0x1b7/0x7d4 [ 51.643186] [ 51.643400] Last potentially related work creation: [ 51.643980] kasan_save_stack+0x22/0x50 [ 51.644481] __kasan_record_aux_stack+0x8e/0xa0 [ 51.645052] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.645702] remove_vma+0x139/0x170 [ 51.646204] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.646759] do_vmi_munmap+0x1f1/0x2b0 [ 51.647242] __vm_munmap+0x138/0x3a0 [ 51.647705] __x64_sys_munmap+0x59/0x80 [ 51.648203] do_syscall_64+0x3f/0x90 [ 51.648684] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.649319] [ 51.649544] The buggy address belongs to the object at ffff88800d8169f8 [ 51.649544] which belongs to the cache vm_area_struct of size 168 [ 51.651000] The buggy address is located 88 bytes inside of [ 51.651000] freed 168-byte region [ffff88800d8169f8, ffff88800d816aa0) [ 51.652405] [ 51.652623] The buggy address belongs to the physical page: [ 51.653279] page:0000000039575f2e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd816 [ 51.654401] memcg:ffff88800d5ab101 [ 51.654828] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 51.655530] page_type: 0xffffffff() [ 51.655979] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 51.656896] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5ab101 [ 51.657812] page dumped because: kasan: bad access detected [ 51.658476] [ 51.658689] Memory state around the buggy address: [ 51.659276] ffff88800d816900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.660129] ffff88800d816980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 51.660975] >ffff88800d816a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.661841] ^ [ 51.662546] ffff88800d816a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 51.663394] ffff88800d816b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.664257] ================================================================== [ 51.665184] Disabling lock debugging due to kernel taint [ 53.828233] BUG: Bad rss-counter state mm:00000000335b25b6 type:MM_FILEPAGES val:33 [ 53.829421] BUG: Bad rss-counter state mm:00000000335b25b6 type:MM_ANONPAGES val:22 [ 54.275675] BUG: Bad rss-counter state mm:0000000017c181eb type:MM_FILEPAGES val:33 [ 54.277519] BUG: Bad rss-counter state mm:0000000017c181eb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39712' (ECDSA) to the list of known hosts. 2023/06/20 01:06:49 fuzzer started 2023/06/20 01:06:49 dialing manager at localhost:44161 2023/06/20 01:06:49 checking machine... 2023/06/20 01:06:49 checking revisions... [ 55.182256] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:06:50 testing simple program... [ 55.229575] cgroup: Unknown subsys name 'net' [ 55.281632] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:06:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000000000f4 RCX=ffffffff8184d064 RDX=ffff8880168351c0 RSI=ffff888004800000 RDI=ffff88801cdaea00 RBP=ffff88801cdaeaf4 RSP=ffff8880185afb98 R8 =0000000000000006 R9 =ffffffff81000000 R10=ffff888001000000 R11=00000000000b6996 R12=ffff88801cdaea00 R13=0000000000000000 R14=ffff888001000000 R15=ffff888004800000 RIP=ffffffff814c02f8 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa7a097d900 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=00007ffedd323000 CR3=000000000ec32000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=6c4d7c32434af100 RBX=ffffffff85d3d010 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffed1001274f45 RSP=ffff8880093a7a18 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=ffff88801b9608a8 R13=ffffffff81badb6a R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff812d89f4 RFL=00000082 [--S----] 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 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=00007ff6cd899870 CR3=000000000cc86000 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=80fb89b86906999f8048450726035064 XMM02=000000000011e798eff9b2d0a8fce9cb XMM03=000000000011e8682c67c8bc2e329bc3 XMM04=eb294f3e5982bd6300000000000ae988 XMM05=d038d4452211fb940000000000135480 XMM06=806171799158d9670000000000134160 XMM07=e042d86d42eb936e0000000000124d08 XMM08=19e365b188393d67000000000011e868 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000