syzkaller login: [ 59.792305] sshd (212) used greatest stack depth: 24128 bytes left [ 59.794117] BUG: Bad rss-counter state mm:0000000000f92d4e type:MM_FILEPAGES val:33 [ 59.795917] BUG: Bad rss-counter state mm:0000000000f92d4e type:MM_ANONPAGES val:22 [ 59.966368] ================================================================== [ 59.967585] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 59.968787] Read of size 8 at addr ffff88800e629b38 by task sshd/219 [ 59.969623] [ 59.969861] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 59.970803] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 59.971932] Call Trace: [ 59.972277] <TASK> [ 59.972589] dump_stack_lvl+0x91/0xf0 [ 59.973140] print_report+0xcc/0x620 [ 59.973671] ? __virt_addr_valid+0x102/0x340 [ 59.974292] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.974957] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.975639] kasan_report+0xbe/0xf0 [ 59.976179] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.976848] vma_interval_tree_remove+0xc75/0xec0 [ 59.977524] vma_prepare+0xc54/0x11a0 [ 59.978041] __split_vma+0x5af/0x950 [ 59.978546] ? __pfx___split_vma+0x10/0x10 [ 59.979142] ? find_held_lock+0x2c/0x110 [ 59.979747] do_vmi_align_munmap+0x2ba/0x11f0 [ 59.980359] ? lock_is_held_type+0x9f/0x120 [ 59.980961] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 59.981620] ? mtree_range_walk+0x632/0x900 [ 59.982242] ? mas_walk+0x5c7/0x7c0 [ 59.982780] do_vmi_munmap+0x1f1/0x2b0 [ 59.983349] mmap_region+0x1f9/0x2660 [ 59.983897] ? vm_mmap_pgoff+0x15c/0x3a0 [ 59.984449] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 59.985254] ? __pfx_lock_acquire+0x10/0x10 [ 59.985820] ? __pfx_mmap_region+0x10/0x10 [ 59.986392] ? security_mmap_addr+0x7d/0xa0 [ 59.986981] ? get_unmapped_area+0x1f5/0x3f0 [ 59.987612] do_mmap+0x854/0xf00 [ 59.988083] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.988607] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 59.989219] ksys_mmap_pgoff+0x3af/0x500 [ 59.989752] do_syscall_64+0x3f/0x90 [ 59.990258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.990982] RIP: 0033:0x7fac44539d82 [ 59.991478] 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 [ 59.993819] RSP: 002b:00007fffc9b52ec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 59.994840] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac44539d82 [ 59.995762] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac43973000 [ 59.996632] RBP: 00007fac43973000 R08: 0000000000000009 R09: 0000000000001000 [ 59.997510] R10: 0000000000000812 R11: 0000000000000206 R12: 000055894a1eaec0 [ 59.998393] R13: 00007fffc9b52ee0 R14: 00007fffc9b52f10 R15: 00007fffc9b53270 [ 59.999300] </TASK> [ 59.999605] [ 59.999835] Allocated by task 212: [ 60.000282] kasan_save_stack+0x22/0x50 [ 60.000806] kasan_set_track+0x25/0x30 [ 60.001318] __kasan_slab_alloc+0x59/0x70 [ 60.001881] kmem_cache_alloc+0x16b/0x370 [ 60.002447] vm_area_dup+0x20/0x160 [ 60.002937] __split_vma+0x170/0x950 [ 60.003441] split_vma+0xc6/0x110 [ 60.003894] mprotect_fixup+0x8d2/0xb30 [ 60.004420] do_mprotect_pkey+0x87e/0xd40 [ 60.004960] __x64_sys_mprotect+0x78/0xc0 [ 60.005505] do_syscall_64+0x3f/0x90 [ 60.006004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.006676] [ 60.006908] Freed by task 212: [ 60.007332] kasan_save_stack+0x22/0x50 [ 60.007859] kasan_set_track+0x25/0x30 [ 60.008375] kasan_save_free_info+0x2b/0x50 [ 60.008929] __kasan_slab_free+0x10a/0x190 [ 60.009488] kmem_cache_free+0x10d/0x4d0 [ 60.010012] rcu_core+0x8c8/0x2860 [ 60.010481] __do_softirq+0x1b7/0x7d4 [ 60.010984] [ 60.011216] Last potentially related work creation: [ 60.011858] kasan_save_stack+0x22/0x50 [ 60.012398] __kasan_record_aux_stack+0x8e/0xa0 [ 60.013007] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.013699] remove_vma+0x139/0x170 [ 60.014179] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.014770] do_vmi_munmap+0x1f1/0x2b0 [ 60.015307] __vm_munmap+0x138/0x3a0 [ 60.015803] __x64_sys_munmap+0x59/0x80 [ 60.016340] do_syscall_64+0x3f/0x90 [ 60.016842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.017517] [ 60.017744] The buggy address belongs to the object at ffff88800e629ae0 [ 60.017744] which belongs to the cache vm_area_struct of size 168 [ 60.019317] The buggy address is located 88 bytes inside of [ 60.019317] freed 168-byte region [ffff88800e629ae0, ffff88800e629b88) [ 60.020837] [ 60.021067] The buggy address belongs to the physical page: [ 60.021760] page:00000000db7a55e0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe629 [ 60.022912] memcg:ffff88800c94ed01 [ 60.023367] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 60.024100] page_type: 0xffffffff() [ 60.024576] raw: 0100000000000200 ffff8880087a0c80 ffffea00002603c0 dead000000000003 [ 60.025544] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c94ed01 [ 60.026508] page dumped because: kasan: bad access detected [ 60.027192] [ 60.027412] Memory state around the buggy address: [ 60.027999] ffff88800e629a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.028871] ffff88800e629a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 60.029762] >ffff88800e629b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.030642] ^ [ 60.031275] ffff88800e629b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 60.032157] ffff88800e629c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 60.033028] ================================================================== [ 60.034093] Disabling lock debugging due to kernel taint [ 62.129983] BUG: Bad rss-counter state mm:00000000ed1b274b type:MM_FILEPAGES val:33 [ 62.131187] BUG: Bad rss-counter state mm:00000000ed1b274b type:MM_ANONPAGES val:22 [ 62.703513] BUG: Bad rss-counter state mm:0000000054d3ab80 type:MM_FILEPAGES val:33 [ 62.704691] BUG: Bad rss-counter state mm:0000000054d3ab80 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45568' (ECDSA) to the list of known hosts. 2023/06/21 00:33:54 fuzzer started 2023/06/21 00:33:55 dialing manager at localhost:36067 2023/06/21 00:33:55 checking machine... 2023/06/21 00:33:55 checking revisions... [ 63.380481] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:33:55 testing simple program... [ 63.423398] cgroup: Unknown subsys name 'net' [ 63.463376] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:33:54 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800fe3f810 RCX=0000000000000001 RDX=1ffff11001fc7f04 RSI=ffff88800fe3f8b0 RDI=ffff88800fe3f820 RBP=ffff88800fe3f8b0 RSP=ffff88800fe3f718 R8 =ffffffff8608a55a R9 =ffff88800fe3f850 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000008 R13=ffff88800fe38000 R14=ffff88800fe3f8b8 R15=ffff88800fe3f810 RIP=ffffffff81130468 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 00007f085c88e900 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=00007ffc835c6000 CR3=0000000016284000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100d9e13b6 RSP=ffff88806cf09da0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffffffff8560b520 R13=ffffffff813782e4 R14=ffff88806cf35000 R15=ffff88800e8162e0 RIP=ffffffff812d86f2 RFL=00000247 [---Z-PC] 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=00007f4ae0f1bef0 CR3=000000000cb5c000 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=2034353a33333a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a33333a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000