syzkaller login: [ 30.963873] BUG: Bad rss-counter state mm:00000000a3f06b93 type:MM_FILEPAGES val:33 [ 30.964962] BUG: Bad rss-counter state mm:00000000a3f06b93 type:MM_ANONPAGES val:22 [ 31.140128] ================================================================== [ 31.141257] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.142545] Read of size 8 at addr ffff88801a183d08 by task sshd/222 [ 31.143490] [ 31.143731] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.144684] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.145772] Call Trace: [ 31.146130] [ 31.146458] dump_stack_lvl+0x91/0xf0 [ 31.146995] print_report+0xcc/0x620 [ 31.147531] ? __virt_addr_valid+0x102/0x340 [ 31.148138] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.148824] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.149506] kasan_report+0xbe/0xf0 [ 31.150030] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.150735] vma_interval_tree_remove+0xc75/0xec0 [ 31.151404] vma_prepare+0xc54/0x11a0 [ 31.151929] __split_vma+0x5af/0x950 [ 31.152448] ? __pfx___split_vma+0x10/0x10 [ 31.153043] ? find_held_lock+0x2c/0x110 [ 31.153625] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.154251] ? lock_is_held_type+0x9f/0x120 [ 31.154883] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.155727] ? mtree_range_walk+0x632/0x900 [ 31.156376] ? mas_walk+0x5c7/0x7c0 [ 31.156866] do_vmi_munmap+0x1f1/0x2b0 [ 31.157394] mmap_region+0x1f9/0x2660 [ 31.157894] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.158448] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.159196] ? __pfx_lock_acquire+0x10/0x10 [ 31.159755] ? __pfx_mmap_region+0x10/0x10 [ 31.160305] ? security_mmap_addr+0x7d/0xa0 [ 31.160857] ? get_unmapped_area+0x1f5/0x3f0 [ 31.161439] do_mmap+0x854/0xf00 [ 31.161895] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.162413] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.162988] ksys_mmap_pgoff+0x3af/0x500 [ 31.163522] do_syscall_64+0x3f/0x90 [ 31.164025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.164698] RIP: 0033:0x7f85f1445d82 [ 31.165181] 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 [ 31.167435] RSP: 002b:00007ffdb8b7bb58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.168369] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f85f1445d82 [ 31.169254] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85f087f000 [ 31.170144] RBP: 00007f85f087f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.171027] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563554678b20 [ 31.171906] R13: 00007ffdb8b7bb70 R14: 00007ffdb8b7bba0 R15: 00007ffdb8b7bf00 [ 31.172782] [ 31.173086] [ 31.173305] Allocated by task 213: [ 31.173748] kasan_save_stack+0x22/0x50 [ 31.174273] kasan_set_track+0x25/0x30 [ 31.174805] __kasan_slab_alloc+0x59/0x70 [ 31.175351] kmem_cache_alloc+0x16b/0x370 [ 31.175888] vm_area_dup+0x20/0x160 [ 31.176357] __split_vma+0x170/0x950 [ 31.176839] split_vma+0xc6/0x110 [ 31.177295] mprotect_fixup+0x8d2/0xb30 [ 31.177819] do_mprotect_pkey+0x87e/0xd40 [ 31.178367] __x64_sys_mprotect+0x78/0xc0 [ 31.178890] do_syscall_64+0x3f/0x90 [ 31.179367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.180008] [ 31.180223] Freed by task 210: [ 31.180622] kasan_save_stack+0x22/0x50 [ 31.181127] kasan_set_track+0x25/0x30 [ 31.181621] kasan_save_free_info+0x2b/0x50 [ 31.182158] __kasan_slab_free+0x10a/0x190 [ 31.182704] kmem_cache_free+0x10d/0x4d0 [ 31.183216] rcu_core+0x8c8/0x2860 [ 31.183656] __do_softirq+0x1b7/0x7d4 [ 31.184133] [ 31.184393] Last potentially related work creation: [ 31.185005] kasan_save_stack+0x22/0x50 [ 31.185502] __kasan_record_aux_stack+0x8e/0xa0 [ 31.186076] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.186726] remove_vma+0x139/0x170 [ 31.187173] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.187724] do_vmi_munmap+0x1f1/0x2b0 [ 31.188208] __vm_munmap+0x138/0x3a0 [ 31.188666] __x64_sys_munmap+0x59/0x80 [ 31.189155] do_syscall_64+0x3f/0x90 [ 31.189626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.190259] [ 31.190481] The buggy address belongs to the object at ffff88801a183cb0 [ 31.190481] which belongs to the cache vm_area_struct of size 168 [ 31.191937] The buggy address is located 88 bytes inside of [ 31.191937] freed 168-byte region [ffff88801a183cb0, ffff88801a183d58) [ 31.193654] [ 31.193921] The buggy address belongs to the physical page: [ 31.194723] page:0000000060c516d6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a183 [ 31.196014] memcg:ffff88801a0ac401 [ 31.196514] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.197275] page_type: 0xffffffff() [ 31.197812] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.198899] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0ac401 [ 31.199974] page dumped because: kasan: bad access detected [ 31.200751] [ 31.201001] Memory state around the buggy address: [ 31.201690] ffff88801a183c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.202724] ffff88801a183c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.203638] >ffff88801a183d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.204486] ^ [ 31.204933] ffff88801a183d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.205789] ffff88801a183e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.206652] ================================================================== [ 31.207823] Disabling lock debugging due to kernel taint [ 33.201168] BUG: Bad rss-counter state mm:00000000e53f53b0 type:MM_FILEPAGES val:33 [ 33.202408] BUG: Bad rss-counter state mm:00000000e53f53b0 type:MM_ANONPAGES val:22 [ 33.751582] BUG: Bad rss-counter state mm:000000002dedcfdd type:MM_FILEPAGES val:33 [ 33.752858] BUG: Bad rss-counter state mm:000000002dedcfdd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4266' (ECDSA) to the list of known hosts. 2023/06/21 08:36:31 fuzzer started 2023/06/21 08:36:32 dialing manager at localhost:36067 2023/06/21 08:36:32 checking machine... 2023/06/21 08:36:32 checking revisions... [ 34.437192] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:36:32 testing simple program... [ 34.503543] cgroup: Unknown subsys name 'net' [ 34.599947] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:36:31 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801686f5b8 RCX=ffff88801686f540 RDX=ffff88801686f520 RSI=ffff888019e8d1c0 RDI=ffff88801686f4d0 RBP=ffff888019e8d1c0 RSP=ffff88801686f4b8 R8 =0000000000000130 R9 =0000000000000000 R10=ffff88801686f520 R11=ff00545000000000 R12=ffff88801686f520 R13=ffff88801686f548 R14=ffff88801686f568 R15=ffff88801686f520 RIP=ffffffff8108df6a 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 00007f1dd52e9900 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=00007f1dd58a0618 CR3=000000000f69a000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f1e904644a0 CR3=000000000975c000 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=2031333a36333a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a36333a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000