syzkaller login: [ 34.118865] BUG: Bad rss-counter state mm:00000000a7978b62 type:MM_FILEPAGES val:33 [ 34.120003] BUG: Bad rss-counter state mm:00000000a7978b62 type:MM_ANONPAGES val:22 [ 34.290696] ================================================================== [ 34.291693] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.292813] Read of size 8 at addr ffff88800ea653f8 by task sshd/220 [ 34.293747] [ 34.293989] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.294962] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.296073] Call Trace: [ 34.296425] [ 34.296737] dump_stack_lvl+0x91/0xf0 [ 34.297308] print_report+0xcc/0x620 [ 34.297841] ? __virt_addr_valid+0x102/0x340 [ 34.298443] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.299120] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.299794] kasan_report+0xbe/0xf0 [ 34.300319] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.300993] vma_interval_tree_remove+0xc75/0xec0 [ 34.301674] vma_prepare+0xc54/0x11a0 [ 34.302227] __split_vma+0x5af/0x950 [ 34.302755] ? __pfx___split_vma+0x10/0x10 [ 34.303346] ? find_held_lock+0x2c/0x110 [ 34.303924] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.304553] ? lock_is_held_type+0x9f/0x120 [ 34.305179] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.305864] ? mtree_range_walk+0x632/0x900 [ 34.306477] ? mas_walk+0x5c7/0x7c0 [ 34.307002] do_vmi_munmap+0x1f1/0x2b0 [ 34.307569] mmap_region+0x1f9/0x2660 [ 34.308101] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.308662] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.309485] ? __pfx_lock_acquire+0x10/0x10 [ 34.310079] ? __pfx_mmap_region+0x10/0x10 [ 34.310681] ? security_mmap_addr+0x7d/0xa0 [ 34.311262] ? get_unmapped_area+0x1f5/0x3f0 [ 34.311880] do_mmap+0x854/0xf00 [ 34.312364] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.312915] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.313571] ksys_mmap_pgoff+0x3af/0x500 [ 34.314144] do_syscall_64+0x3f/0x90 [ 34.314681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.315400] RIP: 0033:0x7f9f45ff5d82 [ 34.315906] 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 [ 34.318298] RSP: 002b:00007ffe89bbd108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.319292] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9f45ff5d82 [ 34.320208] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9f4542f000 [ 34.321154] RBP: 00007f9f4542f000 R08: 0000000000000009 R09: 0000000000001000 [ 34.322085] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561e80ebaf60 [ 34.323006] R13: 00007ffe89bbd120 R14: 00007ffe89bbd150 R15: 00007ffe89bbd4b0 [ 34.323946] [ 34.324265] [ 34.324518] Allocated by task 213: [ 34.324992] kasan_save_stack+0x22/0x50 [ 34.325563] kasan_set_track+0x25/0x30 [ 34.326109] __kasan_slab_alloc+0x59/0x70 [ 34.326696] kmem_cache_alloc+0x16b/0x370 [ 34.327258] vm_area_dup+0x20/0x160 [ 34.327764] __split_vma+0x170/0x950 [ 34.328278] split_vma+0xc6/0x110 [ 34.328756] mprotect_fixup+0x8d2/0xb30 [ 34.329370] do_mprotect_pkey+0x87e/0xd40 [ 34.329936] __x64_sys_mprotect+0x78/0xc0 [ 34.330503] do_syscall_64+0x3f/0x90 [ 34.331023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.331723] [ 34.331965] Freed by task 213: [ 34.332388] kasan_save_stack+0x22/0x50 [ 34.332952] kasan_set_track+0x25/0x30 [ 34.333528] kasan_save_free_info+0x2b/0x50 [ 34.334130] __kasan_slab_free+0x10a/0x190 [ 34.334731] kmem_cache_free+0x10d/0x4d0 [ 34.335291] rcu_core+0x8c8/0x2860 [ 34.335785] __do_softirq+0x1b7/0x7d4 [ 34.336313] [ 34.336551] Last potentially related work creation: [ 34.337209] kasan_save_stack+0x22/0x50 [ 34.337756] __kasan_record_aux_stack+0x8e/0xa0 [ 34.338389] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.339086] remove_vma+0x139/0x170 [ 34.339570] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.340174] do_vmi_munmap+0x1f1/0x2b0 [ 34.340700] __vm_munmap+0x138/0x3a0 [ 34.341229] __x64_sys_munmap+0x59/0x80 [ 34.341755] do_syscall_64+0x3f/0x90 [ 34.342263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.342963] [ 34.343205] Second to last potentially related work creation: [ 34.343951] kasan_save_stack+0x22/0x50 [ 34.344502] __kasan_record_aux_stack+0x8e/0xa0 [ 34.345157] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.345856] remove_vma+0x139/0x170 [ 34.346341] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.346943] do_vmi_munmap+0x1f1/0x2b0 [ 34.347470] mmap_region+0x1f9/0x2660 [ 34.347988] do_mmap+0x854/0xf00 [ 34.348447] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.348979] ksys_mmap_pgoff+0x3af/0x500 [ 34.349546] do_syscall_64+0x3f/0x90 [ 34.350064] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.350759] [ 34.350992] The buggy address belongs to the object at ffff88800ea653a0 [ 34.350992] which belongs to the cache vm_area_struct of size 168 [ 34.352591] The buggy address is located 88 bytes inside of [ 34.352591] freed 168-byte region [ffff88800ea653a0, ffff88800ea65448) [ 34.354136] [ 34.354372] The buggy address belongs to the physical page: [ 34.355099] page:000000005364aa4f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea65 [ 34.356286] memcg:ffff88800e2acb01 [ 34.356745] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.357480] page_type: 0xffffffff() [ 34.357966] raw: 0100000000000200 ffff88800879fc80 ffffea00003b4380 dead000000000008 [ 34.358974] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2acb01 [ 34.359963] page dumped because: kasan: bad access detected [ 34.360687] [ 34.360935] Memory state around the buggy address: [ 34.361545] ffff88800ea65280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 34.362409] ffff88800ea65300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 34.363362] >ffff88800ea65380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.364246] ^ [ 34.365111] ffff88800ea65400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.365987] ffff88800ea65480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.366881] ================================================================== [ 34.367823] Disabling lock debugging due to kernel taint [ 36.793831] BUG: Bad rss-counter state mm:00000000142b1b91 type:MM_FILEPAGES val:33 [ 36.795014] BUG: Bad rss-counter state mm:00000000142b1b91 type:MM_ANONPAGES val:22 [ 37.185133] BUG: Bad rss-counter state mm:00000000408bb54a type:MM_FILEPAGES val:33 [ 37.186210] BUG: Bad rss-counter state mm:00000000408bb54a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5321' (ECDSA) to the list of known hosts. 2023/06/19 19:47:15 fuzzer started 2023/06/19 19:47:15 dialing manager at localhost:44161 2023/06/19 19:47:15 checking machine... 2023/06/19 19:47:15 checking revisions... [ 37.930942] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:47:16 testing simple program... [ 37.970234] cgroup: Unknown subsys name 'net' [ 38.022335] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:47:11 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f8a011acb28 CR3=000000000c9e0000 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=2b04a3d91fcacaa5dc4234917e5e8d63 XMM02=000000000011cf30eff9b2d0a8fce9cb XMM03=000000000011d0002c67c8bc2e329bc3 XMM04=549e5c7693cdbe5c00000000000ae988 XMM05=49f1c3d0c5f71f6d0000000000136560 XMM06=e4cb8bb95a7664b60000000000135418 XMM07=fb795ef6d65770560000000000124518 XMM08=2c67c8bc2e329bc3000000000011cfa0 XMM09=00000000000000000000000000000000 XMM10=20202020002020202020000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000402 RBX=0000000000000201 RCX=ffffffff81534376 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff83c593d4 RSP=ffff888015ff7490 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=000007e2000007e2 R12=ffff88800f639500 R13=ffff88800aabf46c R14=000000000000383d R15=ffff88800aabf5a8 RIP=ffffffff8118db7f RFL=00000002 [-------] 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 00007f9e854c0900 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=00007f9e85a77618 CR3=000000000e37e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000