syzkaller login: [ 41.488752] BUG: Bad rss-counter state mm:000000001fa43415 type:MM_FILEPAGES val:33 [ 41.490033] BUG: Bad rss-counter state mm:000000001fa43415 type:MM_ANONPAGES val:22 [ 41.642576] ================================================================== [ 41.643659] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.644946] Read of size 8 at addr ffff88800e619058 by task sshd/221 [ 41.645800] [ 41.646036] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.646933] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.647953] Call Trace: [ 41.648304] [ 41.648601] dump_stack_lvl+0x91/0xf0 [ 41.649120] print_report+0xcc/0x620 [ 41.649629] ? __virt_addr_valid+0x102/0x340 [ 41.650215] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.650866] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.651555] kasan_report+0xbe/0xf0 [ 41.652078] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.652750] vma_interval_tree_remove+0xc75/0xec0 [ 41.653383] vma_prepare+0xc54/0x11a0 [ 41.653918] __split_vma+0x5af/0x950 [ 41.654425] ? __pfx___split_vma+0x10/0x10 [ 41.654989] ? find_held_lock+0x2c/0x110 [ 41.655544] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.656200] ? lock_is_held_type+0x9f/0x120 [ 41.656774] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.657415] ? mtree_range_walk+0x632/0x900 [ 41.658006] ? mas_walk+0x5c7/0x7c0 [ 41.658524] do_vmi_munmap+0x1f1/0x2b0 [ 41.659048] mmap_region+0x1f9/0x2660 [ 41.659566] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.660118] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.660888] ? __pfx_lock_acquire+0x10/0x10 [ 41.661467] ? __pfx_mmap_region+0x10/0x10 [ 41.662043] ? security_mmap_addr+0x7d/0xa0 [ 41.662616] ? get_unmapped_area+0x1f5/0x3f0 [ 41.663239] do_mmap+0x854/0xf00 [ 41.663716] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.664266] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.664869] ksys_mmap_pgoff+0x3af/0x500 [ 41.665453] do_syscall_64+0x3f/0x90 [ 41.665973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.666673] RIP: 0033:0x7fd7c1125d82 [ 41.667182] 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 [ 41.669480] RSP: 002b:00007ffdec67b628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.670450] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd7c1125d82 [ 41.671369] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd7c055f000 [ 41.672287] RBP: 00007fd7c055f000 R08: 0000000000000009 R09: 0000000000001000 [ 41.673185] R10: 0000000000000812 R11: 0000000000000206 R12: 00005647863d6ec0 [ 41.674097] R13: 00007ffdec67b640 R14: 00007ffdec67b670 R15: 00007ffdec67b9d0 [ 41.675013] [ 41.675331] [ 41.675560] Allocated by task 214: [ 41.676021] kasan_save_stack+0x22/0x50 [ 41.676583] kasan_set_track+0x25/0x30 [ 41.677109] __kasan_slab_alloc+0x59/0x70 [ 41.677665] kmem_cache_alloc+0x16b/0x370 [ 41.678218] vm_area_dup+0x20/0x160 [ 41.678708] __split_vma+0x170/0x950 [ 41.679211] split_vma+0xc6/0x110 [ 41.679687] mprotect_fixup+0x8d2/0xb30 [ 41.680233] do_mprotect_pkey+0x87e/0xd40 [ 41.680789] __x64_sys_mprotect+0x78/0xc0 [ 41.681340] do_syscall_64+0x3f/0x90 [ 41.681833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.682508] [ 41.682734] Freed by task 214: [ 41.683155] kasan_save_stack+0x22/0x50 [ 41.683692] kasan_set_track+0x25/0x30 [ 41.684241] kasan_save_free_info+0x2b/0x50 [ 41.684823] __kasan_slab_free+0x10a/0x190 [ 41.685402] kmem_cache_free+0x10d/0x4d0 [ 41.686057] rcu_core+0x8c8/0x2860 [ 41.686537] __do_softirq+0x1b7/0x7d4 [ 41.687046] [ 41.687279] Last potentially related work creation: [ 41.687905] kasan_save_stack+0x22/0x50 [ 41.688509] __kasan_record_aux_stack+0x8e/0xa0 [ 41.689109] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.689799] remove_vma+0x139/0x170 [ 41.690276] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.690868] do_vmi_munmap+0x1f1/0x2b0 [ 41.691388] __vm_munmap+0x138/0x3a0 [ 41.691885] __x64_sys_munmap+0x59/0x80 [ 41.692426] do_syscall_64+0x3f/0x90 [ 41.692926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.693613] [ 41.693838] The buggy address belongs to the object at ffff88800e619000 [ 41.693838] which belongs to the cache vm_area_struct of size 168 [ 41.695389] The buggy address is located 88 bytes inside of [ 41.695389] freed 168-byte region [ffff88800e619000, ffff88800e6190a8) [ 41.696902] [ 41.697132] The buggy address belongs to the physical page: [ 41.697835] page:00000000c6bfc1af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe619 [ 41.699005] memcg:ffff88800e52dd01 [ 41.699472] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.700171] page_type: 0xffffffff() [ 41.700651] raw: 0100000000000200 ffff88800879fc80 ffffea00003545c0 dead000000000002 [ 41.701646] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e52dd01 [ 41.702633] page dumped because: kasan: bad access detected [ 41.703332] [ 41.703564] Memory state around the buggy address: [ 41.704224] ffff88800e618f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.705150] ffff88800e618f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 41.706093] >ffff88800e619000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.707003] ^ [ 41.707788] ffff88800e619080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 41.708722] ffff88800e619100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.709624] ================================================================== [ 41.710764] Disabling lock debugging due to kernel taint [ 43.735219] BUG: Bad rss-counter state mm:00000000dc4a69e3 type:MM_FILEPAGES val:33 [ 43.736430] BUG: Bad rss-counter state mm:00000000dc4a69e3 type:MM_ANONPAGES val:22 [ 44.239232] BUG: Bad rss-counter state mm:00000000a43f430b type:MM_FILEPAGES val:33 [ 44.240562] BUG: Bad rss-counter state mm:00000000a43f430b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32852' (ECDSA) to the list of known hosts. 2023/06/19 20:54:45 fuzzer started 2023/06/19 20:54:46 dialing manager at localhost:44161 2023/06/19 20:54:46 checking machine... 2023/06/19 20:54:46 checking revisions... [ 44.894793] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:54:46 testing simple program... [ 44.942527] cgroup: Unknown subsys name 'net' [ 44.983885] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:54:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ebe1900 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffed1001d7c322 RSP=ffff88800f177c38 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888008f80000 R13=dffffc0000000000 R14=ffff88800ebe1910 R15=0000000000000000 RIP=ffffffff81828ca7 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 00007f31d050b900 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=00007f31d0ac0650 CR3=000000000e42a000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fa569f43d10 CR3=000000000f2ae000 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=2035343a34353a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a34353a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000