syzkaller login: [ 37.943897] BUG: Bad rss-counter state mm:000000000d92da5f type:MM_FILEPAGES val:33 [ 37.945098] BUG: Bad rss-counter state mm:000000000d92da5f type:MM_ANONPAGES val:22 [ 38.113008] ================================================================== [ 38.114235] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.115704] Read of size 8 at addr ffff888019d2ab38 by task sshd/219 [ 38.116581] [ 38.116835] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.117823] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.118931] Call Trace: [ 38.119308] [ 38.119640] dump_stack_lvl+0x91/0xf0 [ 38.120205] print_report+0xcc/0x620 [ 38.120763] ? __virt_addr_valid+0x102/0x340 [ 38.121391] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.122099] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.122813] kasan_report+0xbe/0xf0 [ 38.123387] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.124103] vma_interval_tree_remove+0xc75/0xec0 [ 38.124805] vma_prepare+0xc54/0x11a0 [ 38.125363] __split_vma+0x5af/0x950 [ 38.125908] ? __pfx___split_vma+0x10/0x10 [ 38.126522] ? find_held_lock+0x2c/0x110 [ 38.127135] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.127795] ? lock_is_held_type+0x9f/0x120 [ 38.128410] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.129102] ? mtree_range_walk+0x632/0x900 [ 38.129748] ? mas_walk+0x5c7/0x7c0 [ 38.130292] do_vmi_munmap+0x1f1/0x2b0 [ 38.130867] mmap_region+0x1f9/0x2660 [ 38.131434] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.132021] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.132831] ? __pfx_lock_acquire+0x10/0x10 [ 38.133443] ? __pfx_mmap_region+0x10/0x10 [ 38.134046] ? security_mmap_addr+0x7d/0xa0 [ 38.134654] ? get_unmapped_area+0x1f5/0x3f0 [ 38.135285] do_mmap+0x854/0xf00 [ 38.135788] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.136351] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.136994] ksys_mmap_pgoff+0x3af/0x500 [ 38.137572] do_syscall_64+0x3f/0x90 [ 38.138115] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.138846] RIP: 0033:0x7fa5b40e1d82 [ 38.139374] 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 [ 38.141809] RSP: 002b:00007ffc858a07d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.142845] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa5b40e1d82 [ 38.143834] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa5b351b000 [ 38.144801] RBP: 00007fa5b351b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.145772] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fa8c14db20 [ 38.146726] R13: 00007ffc858a07f0 R14: 00007ffc858a0820 R15: 00007ffc858a0b80 [ 38.147747] [ 38.148087] [ 38.148333] Allocated by task 212: [ 38.148827] kasan_save_stack+0x22/0x50 [ 38.149414] kasan_set_track+0x25/0x30 [ 38.149968] __kasan_slab_alloc+0x59/0x70 [ 38.150560] kmem_cache_alloc+0x16b/0x370 [ 38.151173] vm_area_dup+0x20/0x160 [ 38.151687] __split_vma+0x170/0x950 [ 38.152221] split_vma+0xc6/0x110 [ 38.152719] mprotect_fixup+0x8d2/0xb30 [ 38.153280] do_mprotect_pkey+0x87e/0xd40 [ 38.153869] __x64_sys_mprotect+0x78/0xc0 [ 38.154469] do_syscall_64+0x3f/0x90 [ 38.155012] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.155736] [ 38.156056] Freed by task 13: [ 38.156515] kasan_save_stack+0x22/0x50 [ 38.157111] kasan_set_track+0x25/0x30 [ 38.157695] kasan_save_free_info+0x2b/0x50 [ 38.158325] __kasan_slab_free+0x10a/0x190 [ 38.158986] kmem_cache_free+0x10d/0x4d0 [ 38.159590] rcu_core+0x8c8/0x2860 [ 38.160114] __do_softirq+0x1b7/0x7d4 [ 38.160691] [ 38.160951] Last potentially related work creation: [ 38.161650] kasan_save_stack+0x22/0x50 [ 38.162247] __kasan_record_aux_stack+0x8e/0xa0 [ 38.162922] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.163704] remove_vma+0x139/0x170 [ 38.164243] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.164910] do_vmi_munmap+0x1f1/0x2b0 [ 38.165488] __vm_munmap+0x138/0x3a0 [ 38.166039] __x64_sys_munmap+0x59/0x80 [ 38.166628] do_syscall_64+0x3f/0x90 [ 38.167197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.167955] [ 38.168206] The buggy address belongs to the object at ffff888019d2aae0 [ 38.168206] which belongs to the cache vm_area_struct of size 168 [ 38.169786] The buggy address is located 88 bytes inside of [ 38.169786] freed 168-byte region [ffff888019d2aae0, ffff888019d2ab88) [ 38.171213] [ 38.171433] The buggy address belongs to the physical page: [ 38.172094] page:00000000fb8a27b0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d2a [ 38.173197] memcg:ffff888018fca701 [ 38.173632] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.174282] page_type: 0xffffffff() [ 38.174736] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.175670] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018fca701 [ 38.176584] page dumped because: kasan: bad access detected [ 38.177261] [ 38.177480] Memory state around the buggy address: [ 38.178061] ffff888019d2aa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.178918] ffff888019d2aa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.179785] >ffff888019d2ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.180654] ^ [ 38.181276] ffff888019d2ab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.182140] ffff888019d2ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.183015] ================================================================== [ 38.183950] Disabling lock debugging due to kernel taint [ 40.219542] BUG: Bad rss-counter state mm:000000009258fcea type:MM_FILEPAGES val:33 [ 40.220662] BUG: Bad rss-counter state mm:000000009258fcea type:MM_ANONPAGES val:22 [ 40.711496] BUG: Bad rss-counter state mm:000000004c108c8d type:MM_FILEPAGES val:33 [ 40.713516] BUG: Bad rss-counter state mm:000000004c108c8d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14943' (ECDSA) to the list of known hosts. 2023/06/19 19:29:39 fuzzer started 2023/06/19 19:29:39 dialing manager at localhost:44161 2023/06/19 19:29:39 checking machine... 2023/06/19 19:29:39 checking revisions... [ 41.450542] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:29:39 testing simple program... [ 41.505143] cgroup: Unknown subsys name 'net' [ 41.567068] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:29:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000040 RCX=ffffffff818a30a1 RDX=ffff888015cf8000 RSI=0000000000000000 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff88800ede7a10 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000040 R11=00000000000b6996 R12=ffff88800ede7c48 R13=dffffc0000000000 R14=ffff88800ede7c48 R15=ffff888015c91121 RIP=ffffffff814c07e4 RFL=00000202 [-------] 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 00007fc81d387900 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=00007fc81d93f0b0 CR3=000000001c950000 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=0000000000000282 RBX=ffff888015ff4720 RCX=ffff88806cb61800 RDX=0000000000000000 RSI=ffff888015ff4720 RDI=ffff88800844f780 RBP=ffff88800844f780 RSP=ffff88806cf09e00 R8 =0000000028b3ac31 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000000000 R12=ffff88800844f780 R13=ffffea000057fd00 R14=ffffffff813782a8 R15=ffff888015ff47a0 RIP=ffffffff81810532 RFL=00000282 [--S----] 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 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=00007f1270246f10 CR3=0000000009462000 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=1f4c1d97b84008a5c243d2de0ceab346 XMM02=000000000011cd00eff9b2d0a8fce9cb XMM03=000000000011cdd02c67c8bc2e329bc3 XMM04=8c167c572855031800000000000ae988 XMM05=dfcdbad4f1609c370000000000133e40 XMM06=85da44062b2ea8800000000000132ca8 XMM07=e042d86d42eb936e0000000000124528 XMM08=59ec0f6290119489000000000011cdd0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000