syzkaller login: [ 38.852557] BUG: Bad rss-counter state mm:00000000476d921a type:MM_FILEPAGES val:33 [ 38.853712] BUG: Bad rss-counter state mm:00000000476d921a type:MM_ANONPAGES val:22 [ 38.946920] ================================================================== [ 38.947916] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.948848] Read of size 8 at addr ffff88801435d310 by task sshd/220 [ 38.949724] [ 38.949949] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.950817] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.951790] Call Trace: [ 38.952113] [ 38.952401] dump_stack_lvl+0x91/0xf0 [ 38.952897] print_report+0xcc/0x620 [ 38.953381] ? __virt_addr_valid+0x102/0x340 [ 38.953936] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.954560] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.955180] kasan_report+0xbe/0xf0 [ 38.955658] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.956277] vma_interval_tree_remove+0xc75/0xec0 [ 38.956874] vma_prepare+0xc54/0x11a0 [ 38.957357] __split_vma+0x5af/0x950 [ 38.957841] ? __pfx___split_vma+0x10/0x10 [ 38.958368] ? find_held_lock+0x2c/0x110 [ 38.958917] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.959484] ? lock_is_held_type+0x9f/0x120 [ 38.960026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.960632] ? mtree_range_walk+0x632/0x900 [ 38.961182] ? mas_walk+0x5c7/0x7c0 [ 38.961669] do_vmi_munmap+0x1f1/0x2b0 [ 38.962164] mmap_region+0x1f9/0x2660 [ 38.962657] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.963174] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.963893] ? __pfx_lock_acquire+0x10/0x10 [ 38.964432] ? __pfx_mmap_region+0x10/0x10 [ 38.964965] ? security_mmap_addr+0x7d/0xa0 [ 38.965493] ? get_unmapped_area+0x1f5/0x3f0 [ 38.966042] do_mmap+0x854/0xf00 [ 38.966502] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.967040] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.967602] ksys_mmap_pgoff+0x3af/0x500 [ 38.968119] do_syscall_64+0x3f/0x90 [ 38.968596] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.969247] RIP: 0033:0x7f1f7b5f9d82 [ 38.969707] 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 [ 38.971850] RSP: 002b:00007ffe6d214518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.972760] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1f7b5f9d82 [ 38.973632] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1f7aa33000 [ 38.974505] RBP: 00007f1f7aa33000 R08: 0000000000000009 R09: 0000000000001000 [ 38.975350] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f6270bcec0 [ 38.976200] R13: 00007ffe6d214530 R14: 00007ffe6d214560 R15: 00007ffe6d2148c0 [ 38.977061] [ 38.977353] [ 38.977567] Allocated by task 213: [ 38.978002] kasan_save_stack+0x22/0x50 [ 38.978529] kasan_set_track+0x25/0x30 [ 38.979024] __kasan_slab_alloc+0x59/0x70 [ 38.979551] kmem_cache_alloc+0x16b/0x370 [ 38.980070] vm_area_dup+0x20/0x160 [ 38.980524] __split_vma+0x170/0x950 [ 38.981006] split_vma+0xc6/0x110 [ 38.981446] mprotect_fixup+0x8d2/0xb30 [ 38.981955] do_mprotect_pkey+0x87e/0xd40 [ 38.982489] __x64_sys_mprotect+0x78/0xc0 [ 38.983008] do_syscall_64+0x3f/0x90 [ 38.983485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.984132] [ 38.984345] Freed by task 213: [ 38.984739] kasan_save_stack+0x22/0x50 [ 38.985246] kasan_set_track+0x25/0x30 [ 38.985736] kasan_save_free_info+0x2b/0x50 [ 38.986269] __kasan_slab_free+0x10a/0x190 [ 38.986814] kmem_cache_free+0x10d/0x4d0 [ 38.987320] rcu_core+0x8c8/0x2860 [ 38.987766] __do_softirq+0x1b7/0x7d4 [ 38.988248] [ 38.988463] Last potentially related work creation: [ 38.989051] kasan_save_stack+0x22/0x50 [ 38.989554] __kasan_record_aux_stack+0x8e/0xa0 [ 38.990131] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.990846] remove_vma+0x139/0x170 [ 38.991298] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.991979] do_vmi_munmap+0x1f1/0x2b0 [ 38.992457] __vm_munmap+0x138/0x3a0 [ 38.992917] __x64_sys_munmap+0x59/0x80 [ 38.993398] do_syscall_64+0x3f/0x90 [ 38.993859] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.994493] [ 38.994705] The buggy address belongs to the object at ffff88801435d2b8 [ 38.994705] which belongs to the cache vm_area_struct of size 168 [ 38.996129] The buggy address is located 88 bytes inside of [ 38.996129] freed 168-byte region [ffff88801435d2b8, ffff88801435d360) [ 38.997503] [ 38.997714] The buggy address belongs to the physical page: [ 38.998358] page:00000000767b89b9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1435d [ 38.999446] memcg:ffff88800d845e01 [ 38.999861] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.000490] page_type: 0xffffffff() [ 39.000928] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.001830] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d845e01 [ 39.002715] page dumped because: kasan: bad access detected [ 39.003358] [ 39.003571] Memory state around the buggy address: [ 39.004135] ffff88801435d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 39.004970] ffff88801435d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.005798] >ffff88801435d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.006634] ^ [ 39.007086] ffff88801435d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.007916] ffff88801435d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.008744] ================================================================== [ 39.009963] Disabling lock debugging due to kernel taint [ 41.011500] BUG: Bad rss-counter state mm:00000000f053842c type:MM_FILEPAGES val:33 [ 41.012671] BUG: Bad rss-counter state mm:00000000f053842c type:MM_ANONPAGES val:22 [ 41.544502] BUG: Bad rss-counter state mm:000000007f0042fe type:MM_FILEPAGES val:33 [ 41.545855] BUG: Bad rss-counter state mm:000000007f0042fe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4607' (ECDSA) to the list of known hosts. 2023/06/19 22:26:25 fuzzer started 2023/06/19 22:26:25 dialing manager at localhost:44161 2023/06/19 22:26:25 checking machine... 2023/06/19 22:26:25 checking revisions... [ 42.165736] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:26:25 testing simple program... [ 42.207154] cgroup: Unknown subsys name 'net' [ 42.257608] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:26:16 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=0000000000000001 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=00007fff9d460ef8 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=00007f756bc765100000563ab4c21790 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=0000000080000000 RBX=ffff888009aaa5e0 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff83ab3fe3 RDI=ffff8880159d83f4 RBP=0000000000000000 RSP=ffff88801a0ff500 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000bc R11=00000cfd00000cfd R12=0000000000000000 R13=00000000000000bc R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff814c07f1 RFL=00000293 [--S-A-C] 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 00007fb490b81900 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=00007fb491138618 CR3=000000000eba8000 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