syzkaller login: [ 30.682086] BUG: Bad rss-counter state mm:00000000521ad56e type:MM_FILEPAGES val:33 [ 30.683349] BUG: Bad rss-counter state mm:00000000521ad56e type:MM_ANONPAGES val:22 [ 30.835005] ================================================================== [ 30.836069] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.837192] Read of size 8 at addr ffff88800e1a3310 by task sshd/219 [ 30.838067] [ 30.838298] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.839222] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.840252] Call Trace: [ 30.840603] [ 30.840909] dump_stack_lvl+0x91/0xf0 [ 30.841432] print_report+0xcc/0x620 [ 30.841949] ? __virt_addr_valid+0x102/0x340 [ 30.842544] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.843204] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.843863] kasan_report+0xbe/0xf0 [ 30.844368] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.845046] vma_interval_tree_remove+0xc75/0xec0 [ 30.845694] vma_prepare+0xc54/0x11a0 [ 30.846207] __split_vma+0x5af/0x950 [ 30.846713] ? __pfx___split_vma+0x10/0x10 [ 30.847272] ? find_held_lock+0x2c/0x110 [ 30.847824] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.848421] ? lock_is_held_type+0x9f/0x120 [ 30.849017] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.849664] ? mtree_range_walk+0x632/0x900 [ 30.850250] ? mas_walk+0x5c7/0x7c0 [ 30.850754] do_vmi_munmap+0x1f1/0x2b0 [ 30.851333] mmap_region+0x1f9/0x2660 [ 30.851866] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.852410] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.853223] ? __pfx_lock_acquire+0x10/0x10 [ 30.853801] ? __pfx_mmap_region+0x10/0x10 [ 30.854373] ? security_mmap_addr+0x7d/0xa0 [ 30.854936] ? get_unmapped_area+0x1f5/0x3f0 [ 30.855518] do_mmap+0x854/0xf00 [ 30.855991] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.856533] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.857129] ksys_mmap_pgoff+0x3af/0x500 [ 30.857667] do_syscall_64+0x3f/0x90 [ 30.858175] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.858874] RIP: 0033:0x7f4cd6f59d82 [ 30.859354] 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 [ 30.861610] RSP: 002b:00007fffb9a28ca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.862592] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4cd6f59d82 [ 30.863516] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4cd6393000 [ 30.864428] RBP: 00007f4cd6393000 R08: 0000000000000009 R09: 0000000000001000 [ 30.865354] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560497617ec0 [ 30.866270] R13: 00007fffb9a28cc0 R14: 00007fffb9a28cf0 R15: 00007fffb9a29050 [ 30.867191] [ 30.867509] [ 30.867741] Allocated by task 212: [ 30.868203] kasan_save_stack+0x22/0x50 [ 30.868768] kasan_set_track+0x25/0x30 [ 30.869304] __kasan_slab_alloc+0x59/0x70 [ 30.869861] kmem_cache_alloc+0x16b/0x370 [ 30.870423] vm_area_dup+0x20/0x160 [ 30.870912] __split_vma+0x170/0x950 [ 30.871416] split_vma+0xc6/0x110 [ 30.871891] mprotect_fixup+0x8d2/0xb30 [ 30.872434] do_mprotect_pkey+0x87e/0xd40 [ 30.872995] __x64_sys_mprotect+0x78/0xc0 [ 30.873554] do_syscall_64+0x3f/0x90 [ 30.874067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.874762] [ 30.874994] Freed by task 212: [ 30.875411] kasan_save_stack+0x22/0x50 [ 30.875953] kasan_set_track+0x25/0x30 [ 30.876508] kasan_save_free_info+0x2b/0x50 [ 30.877089] __kasan_slab_free+0x10a/0x190 [ 30.877668] kmem_cache_free+0x10d/0x4d0 [ 30.878225] rcu_core+0x8c8/0x2860 [ 30.878708] __do_softirq+0x1b7/0x7d4 [ 30.879224] [ 30.879460] Last potentially related work creation: [ 30.880101] kasan_save_stack+0x22/0x50 [ 30.880660] __kasan_record_aux_stack+0x8e/0xa0 [ 30.881281] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.881982] remove_vma+0x139/0x170 [ 30.882475] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.883082] do_vmi_munmap+0x1f1/0x2b0 [ 30.883612] __vm_munmap+0x138/0x3a0 [ 30.884122] __x64_sys_munmap+0x59/0x80 [ 30.884671] do_syscall_64+0x3f/0x90 [ 30.885183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.885882] [ 30.886118] The buggy address belongs to the object at ffff88800e1a32b8 [ 30.886118] which belongs to the cache vm_area_struct of size 168 [ 30.887708] The buggy address is located 88 bytes inside of [ 30.887708] freed 168-byte region [ffff88800e1a32b8, ffff88800e1a3360) [ 30.889225] [ 30.889461] The buggy address belongs to the physical page: [ 30.890171] page:000000001768ed02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1a3 [ 30.891349] memcg:ffff88800e786901 [ 30.891812] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.892523] page_type: 0xffffffff() [ 30.893016] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.894011] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e786901 [ 30.894976] page dumped because: kasan: bad access detected [ 30.895696] [ 30.895929] Memory state around the buggy address: [ 30.896573] ffff88800e1a3200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.897498] ffff88800e1a3280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.898427] >ffff88800e1a3300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.899351] ^ [ 30.899857] ffff88800e1a3380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.900786] ffff88800e1a3400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.901712] ================================================================== [ 30.902968] Disabling lock debugging due to kernel taint [ 32.761212] BUG: Bad rss-counter state mm:000000009e502c1d type:MM_FILEPAGES val:33 [ 32.762449] BUG: Bad rss-counter state mm:000000009e502c1d type:MM_ANONPAGES val:22 [ 33.304781] BUG: Bad rss-counter state mm:000000003767ebe4 type:MM_FILEPAGES val:33 [ 33.305818] BUG: Bad rss-counter state mm:000000003767ebe4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21026' (ECDSA) to the list of known hosts. 2023/06/21 09:42:04 fuzzer started 2023/06/21 09:42:04 dialing manager at localhost:36067 2023/06/21 09:42:04 checking machine... 2023/06/21 09:42:04 checking revisions... [ 33.917095] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:42:04 testing simple program... [ 33.959483] cgroup: Unknown subsys name 'net' [ 34.003412] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:42:04 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff88806ce09e10 RDI=ffffffff81809add RBP=ffff88806ce09af0 RSP=ffff88806ce09a80 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff8880163d9b40 R15=ffff88800d2cfa00 RIP=ffffffff81130399 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 00007f7f2c844900 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=00007f7f2cdf9650 CR3=000000000eb5a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1001956ae4 RBX=ffff88800cab5720 RCX=ffffffff812e0126 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff88800cab5720 RBP=ffffed1001956ae4 RSP=ffff88800f3d7780 R8 =0000000000000001 R9 =ffffed1001956ae4 R10=ffff88800cab5723 R11=0030733a745f6c65 R12=ffff88800cab5728 R13=ffff88800cab5730 R14=ffffffff81eeadb0 R15=1ffff11001e7af1d RIP=ffffffff8180f09a RFL=00000086 [--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 00007fe08a8a7900 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=00007fe089d3ab40 CR3=000000000d7c4000 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=2264229cb2bb738d7f41b5d213f72f86 XMM02=000000000011a528eff9b2d0a8fce9cb XMM03=000000000011a5f82c67c8bc2e329bc3 XMM04=95d59c8ca3683d5900000000000ae988 XMM05=416c9463a4501a090000000000132280 XMM06=dfcdbad4f1609c370000000000130da8 XMM07=fb795ef6d65770560000000000120fe0 XMM08=2c67c8bc2e329bc3000000000011a598 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000