syzkaller login: [ 38.810483] BUG: Bad rss-counter state mm:00000000b94246a5 type:MM_FILEPAGES val:33 [ 38.811206] BUG: Bad rss-counter state mm:00000000b94246a5 type:MM_ANONPAGES val:22 [ 38.932589] ================================================================== [ 38.933283] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.933961] Read of size 8 at addr ffff88800e606c20 by task sshd/220 [ 38.934506] [ 38.934661] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.935329] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.936034] Call Trace: [ 38.936259] [ 38.936601] dump_stack_lvl+0x91/0xf0 [ 38.936986] print_report+0xcc/0x620 [ 38.937338] ? __virt_addr_valid+0x102/0x340 [ 38.937726] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.938156] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.938590] kasan_report+0xbe/0xf0 [ 38.938944] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.939403] vma_interval_tree_remove+0xc75/0xec0 [ 38.939831] vma_prepare+0xc54/0x11a0 [ 38.940166] __split_vma+0x5af/0x950 [ 38.940495] ? __pfx___split_vma+0x10/0x10 [ 38.940876] ? find_held_lock+0x2c/0x110 [ 38.941251] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.941648] ? lock_is_held_type+0x9f/0x120 [ 38.942024] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.942449] ? mtree_range_walk+0x632/0x900 [ 38.942844] ? mas_walk+0x5c7/0x7c0 [ 38.943178] do_vmi_munmap+0x1f1/0x2b0 [ 38.943549] mmap_region+0x1f9/0x2660 [ 38.943886] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.944242] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.944746] ? __pfx_lock_acquire+0x10/0x10 [ 38.945120] ? __pfx_mmap_region+0x10/0x10 [ 38.945487] ? security_mmap_addr+0x7d/0xa0 [ 38.945871] ? get_unmapped_area+0x1f5/0x3f0 [ 38.946255] do_mmap+0x854/0xf00 [ 38.946569] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.946913] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.947355] ksys_mmap_pgoff+0x3af/0x500 [ 38.947718] do_syscall_64+0x3f/0x90 [ 38.948055] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.948509] RIP: 0033:0x7fefe06c3d82 [ 38.948847] 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 [ 38.950329] RSP: 002b:00007ffecbb4a0a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.950970] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fefe06c3d82 [ 38.951579] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fefdfafd000 [ 38.952178] RBP: 00007fefdfafd000 R08: 0000000000000009 R09: 0000000000001000 [ 38.952780] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ade46e6d90 [ 38.953403] R13: 00007ffecbb4a0c0 R14: 00007ffecbb4a0f0 R15: 00007ffecbb4a450 [ 38.954033] [ 38.954225] [ 38.954377] Allocated by task 213: [ 38.954663] kasan_save_stack+0x22/0x50 [ 38.955059] kasan_set_track+0x25/0x30 [ 38.955526] __kasan_slab_alloc+0x59/0x70 [ 38.955942] kmem_cache_alloc+0x16b/0x370 [ 38.956355] vm_area_dup+0x20/0x160 [ 38.956667] __split_vma+0x170/0x950 [ 38.956983] split_vma+0xc6/0x110 [ 38.957281] mprotect_fixup+0x8d2/0xb30 [ 38.957634] do_mprotect_pkey+0x87e/0xd40 [ 38.958031] __x64_sys_mprotect+0x78/0xc0 [ 38.958396] do_syscall_64+0x3f/0x90 [ 38.958718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.959191] [ 38.959374] Freed by task 204: [ 38.959657] kasan_save_stack+0x22/0x50 [ 38.960013] kasan_set_track+0x25/0x30 [ 38.960385] kasan_save_free_info+0x2b/0x50 [ 38.960763] __kasan_slab_free+0x10a/0x190 [ 38.961125] kmem_cache_free+0x10d/0x4d0 [ 38.961473] rcu_core+0x8c8/0x2860 [ 38.961781] __do_softirq+0x1b7/0x7d4 [ 38.962116] [ 38.962260] Last potentially related work creation: [ 38.962650] kasan_save_stack+0x22/0x50 [ 38.962990] __kasan_record_aux_stack+0x8e/0xa0 [ 38.963417] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.963882] remove_vma+0x139/0x170 [ 38.964187] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.964573] do_vmi_munmap+0x1f1/0x2b0 [ 38.964903] __vm_munmap+0x138/0x3a0 [ 38.965229] __x64_sys_munmap+0x59/0x80 [ 38.965568] do_syscall_64+0x3f/0x90 [ 38.965887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.966321] [ 38.966471] The buggy address belongs to the object at ffff88800e606bc8 [ 38.966471] which belongs to the cache vm_area_struct of size 168 [ 38.967549] The buggy address is located 88 bytes inside of [ 38.967549] freed 168-byte region [ffff88800e606bc8, ffff88800e606c70) [ 38.968509] [ 38.968666] The buggy address belongs to the physical page: [ 38.969139] page:000000002d919ec8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe606 [ 38.969902] memcg:ffff88800e978301 [ 38.970199] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.970652] page_type: 0xffffffff() [ 38.970965] raw: 0100000000000200 ffff8880087a0c80 ffffea000060a280 dead000000000006 [ 38.971626] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e978301 [ 38.972264] page dumped because: kasan: bad access detected [ 38.972726] [ 38.972878] Memory state around the buggy address: [ 38.973275] ffff88800e606b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.973865] ffff88800e606b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.974450] >ffff88800e606c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.975052] ^ [ 38.975460] ffff88800e606c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.976054] ffff88800e606d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.976634] ================================================================== [ 38.977364] Disabling lock debugging due to kernel taint [ 40.384327] BUG: Bad rss-counter state mm:0000000022118891 type:MM_FILEPAGES val:33 [ 40.385034] BUG: Bad rss-counter state mm:0000000022118891 type:MM_ANONPAGES val:22 [ 40.771972] BUG: Bad rss-counter state mm:00000000d9e2d9b7 type:MM_FILEPAGES val:33 [ 40.772710] BUG: Bad rss-counter state mm:00000000d9e2d9b7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39911' (ECDSA) to the list of known hosts. 2023/06/21 09:43:54 fuzzer started 2023/06/21 09:43:55 dialing manager at localhost:36067 2023/06/21 09:43:55 checking machine... 2023/06/21 09:43:55 checking revisions... [ 41.361161] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:43:55 testing simple program... [ 41.406188] cgroup: Unknown subsys name 'net' [ 41.450597] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:43:54 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=00007ffc29945c58 CR3=0000000015bb4000 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=33343a3930203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732034353a3334 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363130 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000100 RDX=ffff888016a01b40 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88806cf09a00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff88800e4c4600 RIP=ffffffff814c0400 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 00007f43968b2900 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=00007f4396e67650 CR3=000000000c94e000 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=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