syzkaller login: [ 30.674938] BUG: Bad rss-counter state mm:00000000f65f9873 type:MM_FILEPAGES val:33 [ 30.676249] BUG: Bad rss-counter state mm:00000000f65f9873 type:MM_ANONPAGES val:22 [ 30.825651] ================================================================== [ 30.826560] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.827532] Read of size 8 at addr ffff888015d29ed8 by task sshd/221 [ 30.828326] [ 30.828606] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.829546] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.830536] Call Trace: [ 30.830877] [ 30.831184] dump_stack_lvl+0x91/0xf0 [ 30.831696] print_report+0xcc/0x620 [ 30.832186] ? __virt_addr_valid+0x102/0x340 [ 30.832766] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.833394] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.834021] kasan_report+0xbe/0xf0 [ 30.834513] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.835150] vma_interval_tree_remove+0xc75/0xec0 [ 30.835762] vma_prepare+0xc54/0x11a0 [ 30.836241] __split_vma+0x5af/0x950 [ 30.836727] ? __pfx___split_vma+0x10/0x10 [ 30.837248] ? mark_lock.part.0+0xef/0x2f50 [ 30.837800] ? __pfx_mark_lock.part.0+0x10/0x10 [ 30.838390] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.838963] ? lock_is_held_type+0x9f/0x120 [ 30.839537] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.840146] ? mtree_range_walk+0x632/0x900 [ 30.840722] ? mas_walk+0x5c7/0x7c0 [ 30.841200] do_vmi_munmap+0x1f1/0x2b0 [ 30.841704] mmap_region+0x1f9/0x2660 [ 30.842188] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.842717] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.843451] ? __pfx_lock_acquire+0x10/0x10 [ 30.843983] ? __pfx_mmap_region+0x10/0x10 [ 30.844536] ? security_mmap_addr+0x7d/0xa0 [ 30.845073] ? get_unmapped_area+0x1f5/0x3f0 [ 30.845651] do_mmap+0x854/0xf00 [ 30.846097] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.846605] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.847185] ksys_mmap_pgoff+0x3af/0x500 [ 30.847709] do_syscall_64+0x3f/0x90 [ 30.848198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.848873] RIP: 0033:0x7fea11648d82 [ 30.849336] 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 [ 30.851527] RSP: 002b:00007ffff1226718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.852452] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fea11648d82 [ 30.853307] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fea10a82000 [ 30.854166] RBP: 00007fea10a82000 R08: 0000000000000009 R09: 0000000000001000 [ 30.855024] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ad7732ec0 [ 30.855897] R13: 00007ffff1226730 R14: 00007ffff1226760 R15: 00007ffff1226ac0 [ 30.856764] [ 30.857060] [ 30.857273] Allocated by task 214: [ 30.857719] kasan_save_stack+0x22/0x50 [ 30.858222] kasan_set_track+0x25/0x30 [ 30.858723] __kasan_slab_alloc+0x59/0x70 [ 30.859267] kmem_cache_alloc+0x16b/0x370 [ 30.859801] vm_area_dup+0x20/0x160 [ 30.860261] __split_vma+0x170/0x950 [ 30.860766] split_vma+0xc6/0x110 [ 30.861210] mprotect_fixup+0x8d2/0xb30 [ 30.861729] do_mprotect_pkey+0x87e/0xd40 [ 30.862247] __x64_sys_mprotect+0x78/0xc0 [ 30.862779] do_syscall_64+0x3f/0x90 [ 30.863261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.863916] [ 30.864135] Freed by task 13: [ 30.864551] kasan_save_stack+0x22/0x50 [ 30.865054] kasan_set_track+0x25/0x30 [ 30.865571] kasan_save_free_info+0x2b/0x50 [ 30.866101] __kasan_slab_free+0x10a/0x190 [ 30.866655] kmem_cache_free+0x10d/0x4d0 [ 30.867172] rcu_core+0x8c8/0x2860 [ 30.867640] __do_softirq+0x1b7/0x7d4 [ 30.868116] [ 30.868333] Last potentially related work creation: [ 30.868938] kasan_save_stack+0x22/0x50 [ 30.869462] __kasan_record_aux_stack+0x8e/0xa0 [ 30.870038] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.870696] remove_vma+0x139/0x170 [ 30.871174] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.871754] do_vmi_munmap+0x1f1/0x2b0 [ 30.872244] __vm_munmap+0x138/0x3a0 [ 30.872743] __x64_sys_munmap+0x59/0x80 [ 30.873235] do_syscall_64+0x3f/0x90 [ 30.873725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.874377] [ 30.874598] The buggy address belongs to the object at ffff888015d29e80 [ 30.874598] which belongs to the cache vm_area_struct of size 168 [ 30.876089] The buggy address is located 88 bytes inside of [ 30.876089] freed 168-byte region [ffff888015d29e80, ffff888015d29f28) [ 30.877538] [ 30.877759] The buggy address belongs to the physical page: [ 30.878440] page:0000000078f0e4d4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d29 [ 30.879562] memcg:ffff888019e56f01 [ 30.879985] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.880657] page_type: 0xffffffff() [ 30.881113] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.882063] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e56f01 [ 30.882993] page dumped because: kasan: bad access detected [ 30.883665] [ 30.883883] Memory state around the buggy address: [ 30.884500] ffff888015d29d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.885355] ffff888015d29e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.886224] >ffff888015d29e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.887104] ^ [ 30.887848] ffff888015d29f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.888725] ffff888015d29f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.889587] ================================================================== [ 30.890769] Disabling lock debugging due to kernel taint [ 33.119849] BUG: Bad rss-counter state mm:000000005b294cc7 type:MM_FILEPAGES val:33 [ 33.120918] BUG: Bad rss-counter state mm:000000005b294cc7 type:MM_ANONPAGES val:22 [ 33.665310] BUG: Bad rss-counter state mm:00000000bc7ba6f6 type:MM_FILEPAGES val:33 [ 33.666337] BUG: Bad rss-counter state mm:00000000bc7ba6f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23461' (ECDSA) to the list of known hosts. 2023/06/20 22:56:17 fuzzer started 2023/06/20 22:56:18 dialing manager at localhost:36067 2023/06/20 22:56:18 checking machine... 2023/06/20 22:56:18 checking revisions... [ 34.293425] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:56:18 testing simple program... [ 34.338869] cgroup: Unknown subsys name 'net' [ 34.409095] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:56:17 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=ffff888008c04000 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=000055d055ac3290 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=00007f94e78bd510000055c7ff717790 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=ffffffff863b3ceb RBX=0000000000000001 RCX=ffffffff863b3ce6 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888016ab7750 RSP=ffff888016ab7688 R8 =ffffffff863b3cea R9 =ffff888016ab7738 R10=0000000000038001 R11=000000000008aaa5 R12=ffff888016ab7758 R13=ffff888016ab7740 R14=ffff888016ab7739 R15=ffff888016ab76f8 RIP=ffffffff81130abf 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 00007f07e68ff900 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=00007ffedbe7c000 CR3=000000000eba6000 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=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