syzkaller login: [ 31.110925] BUG: Bad rss-counter state mm:00000000786b165d type:MM_FILEPAGES val:33 [ 31.112355] BUG: Bad rss-counter state mm:00000000786b165d type:MM_ANONPAGES val:22 [ 31.275475] ================================================================== [ 31.276562] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.277679] Read of size 8 at addr ffff888016d1dc20 by task sshd/221 [ 31.278683] [ 31.278945] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.279963] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.281149] Call Trace: [ 31.281494] [ 31.281776] dump_stack_lvl+0x91/0xf0 [ 31.282267] print_report+0xcc/0x620 [ 31.282750] ? __virt_addr_valid+0x102/0x340 [ 31.283299] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.283916] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.284531] kasan_report+0xbe/0xf0 [ 31.285014] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.285660] vma_interval_tree_remove+0xc75/0xec0 [ 31.286256] vma_prepare+0xc54/0x11a0 [ 31.286731] __split_vma+0x5af/0x950 [ 31.287202] ? __pfx___split_vma+0x10/0x10 [ 31.287724] ? find_held_lock+0x2c/0x110 [ 31.288248] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.288808] ? lock_is_held_type+0x9f/0x120 [ 31.289372] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.289982] ? mtree_range_walk+0x632/0x900 [ 31.290531] ? mas_walk+0x5c7/0x7c0 [ 31.291012] do_vmi_munmap+0x1f1/0x2b0 [ 31.291509] mmap_region+0x1f9/0x2660 [ 31.291986] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.292494] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.293206] ? __pfx_lock_acquire+0x10/0x10 [ 31.293736] ? __pfx_mmap_region+0x10/0x10 [ 31.294257] ? security_mmap_addr+0x7d/0xa0 [ 31.294784] ? get_unmapped_area+0x1f5/0x3f0 [ 31.295333] do_mmap+0x854/0xf00 [ 31.295777] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.296269] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.296825] ksys_mmap_pgoff+0x3af/0x500 [ 31.297354] do_syscall_64+0x3f/0x90 [ 31.297837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.298488] RIP: 0033:0x7f78ec8e4d82 [ 31.298938] 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 [ 31.301062] RSP: 002b:00007ffe180e8338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.301966] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f78ec8e4d82 [ 31.302820] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f78ebd1e000 [ 31.303660] RBP: 00007f78ebd1e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.304511] R10: 0000000000000812 R11: 0000000000000206 R12: 00005647226a5ec0 [ 31.305371] R13: 00007ffe180e8350 R14: 00007ffe180e8380 R15: 00007ffe180e86e0 [ 31.306220] [ 31.306512] [ 31.306725] Allocated by task 214: [ 31.307154] kasan_save_stack+0x22/0x50 [ 31.307659] kasan_set_track+0x25/0x30 [ 31.308153] __kasan_slab_alloc+0x59/0x70 [ 31.308670] kmem_cache_alloc+0x16b/0x370 [ 31.309185] vm_area_dup+0x20/0x160 [ 31.309636] __split_vma+0x170/0x950 [ 31.310097] split_vma+0xc6/0x110 [ 31.310530] mprotect_fixup+0x8d2/0xb30 [ 31.311026] do_mprotect_pkey+0x87e/0xd40 [ 31.311548] __x64_sys_mprotect+0x78/0xc0 [ 31.312061] do_syscall_64+0x3f/0x90 [ 31.312534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.313179] [ 31.313394] Freed by task 214: [ 31.313793] kasan_save_stack+0x22/0x50 [ 31.314290] kasan_set_track+0x25/0x30 [ 31.314783] kasan_save_free_info+0x2b/0x50 [ 31.315308] __kasan_slab_free+0x10a/0x190 [ 31.315841] kmem_cache_free+0x10d/0x4d0 [ 31.316343] rcu_core+0x8c8/0x2860 [ 31.316783] __do_softirq+0x1b7/0x7d4 [ 31.317276] [ 31.317490] Last potentially related work creation: [ 31.318071] kasan_save_stack+0x22/0x50 [ 31.318573] __kasan_record_aux_stack+0x8e/0xa0 [ 31.319143] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.319889] remove_vma+0x139/0x170 [ 31.320339] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.320896] do_vmi_munmap+0x1f1/0x2b0 [ 31.321382] __vm_munmap+0x138/0x3a0 [ 31.321856] __x64_sys_munmap+0x59/0x80 [ 31.322349] do_syscall_64+0x3f/0x90 [ 31.322823] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.323467] [ 31.323680] The buggy address belongs to the object at ffff888016d1dbc8 [ 31.323680] which belongs to the cache vm_area_struct of size 168 [ 31.325163] The buggy address is located 88 bytes inside of [ 31.325163] freed 168-byte region [ffff888016d1dbc8, ffff888016d1dc70) [ 31.326563] [ 31.326779] The buggy address belongs to the physical page: [ 31.327441] page:000000002bcb18fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d1d [ 31.328543] memcg:ffff8880166a1d01 [ 31.328974] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.329631] page_type: 0xffffffff() [ 31.330081] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.331019] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880166a1d01 [ 31.331922] page dumped because: kasan: bad access detected [ 31.332605] [ 31.332817] Memory state around the buggy address: [ 31.333405] ffff888016d1db00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.334266] ffff888016d1db80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.335118] >ffff888016d1dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.335968] ^ [ 31.336493] ffff888016d1dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.337351] ffff888016d1dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.338201] ================================================================== [ 31.339261] Disabling lock debugging due to kernel taint [ 33.309704] BUG: Bad rss-counter state mm:00000000879409e8 type:MM_FILEPAGES val:33 [ 33.310697] BUG: Bad rss-counter state mm:00000000879409e8 type:MM_ANONPAGES val:22 [ 33.835170] BUG: Bad rss-counter state mm:00000000b6c84a97 type:MM_FILEPAGES val:33 [ 33.836294] BUG: Bad rss-counter state mm:00000000b6c84a97 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30759' (ECDSA) to the list of known hosts. 2023/06/20 13:14:10 fuzzer started 2023/06/20 13:14:10 dialing manager at localhost:36067 2023/06/20 13:14:10 checking machine... 2023/06/20 13:14:10 checking revisions... [ 34.560269] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:14:11 testing simple program... [ 34.611311] cgroup: Unknown subsys name 'net' [ 34.674667] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:14:10 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ffd4ea712d8 CR3=0000000005482000 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=00007f29aedc15100000556fd8b80790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff846000aa RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800d577f01 RSI=ffff88800d577f50 RDI=ffff88800d577f50 RBP=ffff88806cf09af0 RSP=ffff88806cf09a20 R8 =ffffffff864b2030 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88800d577f58 R15=ffff88806cf09a98 RIP=ffffffff8112fbf3 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 00007f40bb0f6900 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=00007fe345f7b650 CR3=000000000f3a2000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=bf57b3420b3e523a00000000000ae988 XMM05=1ac2df32dbfa8f510000000000132a60 XMM06=e4cb8bb95a7664b600000000001318c0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000