syzkaller login: [ 31.006506] BUG: Bad rss-counter state mm:00000000c086cada type:MM_FILEPAGES val:33 [ 31.007965] BUG: Bad rss-counter state mm:00000000c086cada type:MM_ANONPAGES val:22 [ 31.172054] ================================================================== [ 31.173174] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.174322] Read of size 8 at addr ffff888019fe4228 by task sshd/220 [ 31.175325] [ 31.175599] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.176685] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.177917] Call Trace: [ 31.178312] [ 31.178657] dump_stack_lvl+0x91/0xf0 [ 31.179254] print_report+0xcc/0x620 [ 31.179849] ? __virt_addr_valid+0x102/0x340 [ 31.180531] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.181248] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.181850] kasan_report+0xbe/0xf0 [ 31.182300] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.182889] vma_interval_tree_remove+0xc75/0xec0 [ 31.183462] vma_prepare+0xc54/0x11a0 [ 31.183929] __split_vma+0x5af/0x950 [ 31.184373] ? __pfx___split_vma+0x10/0x10 [ 31.184875] ? find_held_lock+0x2c/0x110 [ 31.185365] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.185904] ? lock_is_held_type+0x9f/0x120 [ 31.186416] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.186990] ? mtree_range_walk+0x632/0x900 [ 31.187513] ? mas_walk+0x5c7/0x7c0 [ 31.187990] do_vmi_munmap+0x1f1/0x2b0 [ 31.188458] mmap_region+0x1f9/0x2660 [ 31.188916] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.189402] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.190078] ? __pfx_lock_acquire+0x10/0x10 [ 31.190588] ? __pfx_mmap_region+0x10/0x10 [ 31.191118] ? security_mmap_addr+0x7d/0xa0 [ 31.191668] ? get_unmapped_area+0x1f5/0x3f0 [ 31.192214] do_mmap+0x854/0xf00 [ 31.192651] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.193156] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.193715] ksys_mmap_pgoff+0x3af/0x500 [ 31.194222] do_syscall_64+0x3f/0x90 [ 31.194699] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.195351] RIP: 0033:0x7eff5b173d82 [ 31.195822] 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 [ 31.197962] RSP: 002b:00007ffef88fa9b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.198871] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff5b173d82 [ 31.199733] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff5a5ad000 [ 31.200579] RBP: 00007eff5a5ad000 R08: 0000000000000009 R09: 0000000000001000 [ 31.201435] R10: 0000000000000812 R11: 0000000000000206 R12: 000055af80afcf70 [ 31.202288] R13: 00007ffef88fa9d0 R14: 00007ffef88faa00 R15: 00007ffef88fad60 [ 31.203152] [ 31.203451] [ 31.203673] Allocated by task 213: [ 31.204106] kasan_save_stack+0x22/0x50 [ 31.204620] kasan_set_track+0x25/0x30 [ 31.205109] __kasan_slab_alloc+0x59/0x70 [ 31.205627] kmem_cache_alloc+0x16b/0x370 [ 31.206155] vm_area_dup+0x20/0x160 [ 31.206613] __split_vma+0x170/0x950 [ 31.207071] split_vma+0xc6/0x110 [ 31.207511] mprotect_fixup+0x8d2/0xb30 [ 31.208027] do_mprotect_pkey+0x87e/0xd40 [ 31.208556] __x64_sys_mprotect+0x78/0xc0 [ 31.209073] do_syscall_64+0x3f/0x90 [ 31.209541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.210186] [ 31.210400] Freed by task 213: [ 31.210784] kasan_save_stack+0x22/0x50 [ 31.211296] kasan_set_track+0x25/0x30 [ 31.211790] kasan_save_free_info+0x2b/0x50 [ 31.212316] __kasan_slab_free+0x10a/0x190 [ 31.212861] kmem_cache_free+0x10d/0x4d0 [ 31.213379] rcu_core+0x8c8/0x2860 [ 31.213824] __do_softirq+0x1b7/0x7d4 [ 31.214298] [ 31.214515] Last potentially related work creation: [ 31.215101] kasan_save_stack+0x22/0x50 [ 31.215608] __kasan_record_aux_stack+0x8e/0xa0 [ 31.216194] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.216842] remove_vma+0x139/0x170 [ 31.217288] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.217852] do_vmi_munmap+0x1f1/0x2b0 [ 31.218335] __vm_munmap+0x138/0x3a0 [ 31.218806] __x64_sys_munmap+0x59/0x80 [ 31.219302] do_syscall_64+0x3f/0x90 [ 31.219790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.220440] [ 31.220652] The buggy address belongs to the object at ffff888019fe41d0 [ 31.220652] which belongs to the cache vm_area_struct of size 168 [ 31.222125] The buggy address is located 88 bytes inside of [ 31.222125] freed 168-byte region [ffff888019fe41d0, ffff888019fe4278) [ 31.223518] [ 31.223742] The buggy address belongs to the physical page: [ 31.224416] page:00000000a762081a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19fe4 [ 31.225499] memcg:ffff8880146a2a01 [ 31.225922] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.226577] page_type: 0xffffffff() [ 31.227031] raw: 0100000000000200 ffff8880087a0c80 ffffea000063c740 dead000000000002 [ 31.227965] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146a2a01 [ 31.228866] page dumped because: kasan: bad access detected [ 31.229532] [ 31.229752] Memory state around the buggy address: [ 31.230335] ffff888019fe4100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.231196] ffff888019fe4180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.232068] >ffff888019fe4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.232927] ^ [ 31.233487] ffff888019fe4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.234354] ffff888019fe4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.235214] ================================================================== [ 31.236184] Disabling lock debugging due to kernel taint [ 33.293485] BUG: Bad rss-counter state mm:00000000623206a6 type:MM_FILEPAGES val:33 [ 33.294758] BUG: Bad rss-counter state mm:00000000623206a6 type:MM_ANONPAGES val:22 [ 33.726483] BUG: Bad rss-counter state mm:00000000a3e0abe0 type:MM_FILEPAGES val:33 [ 33.727575] BUG: Bad rss-counter state mm:00000000a3e0abe0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54059' (ECDSA) to the list of known hosts. 2023/06/21 06:46:03 fuzzer started 2023/06/21 06:46:03 dialing manager at localhost:36067 2023/06/21 06:46:03 checking machine... 2023/06/21 06:46:03 checking revisions... [ 34.430120] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:46:03 testing simple program... [ 34.480966] cgroup: Unknown subsys name 'net' [ 34.521156] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:46:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11001ff916e RSI=0000000000000000 RDI=ffff88800ffc8b70 RBP=ffff888016342000 RSP=ffff88801034f9c0 R8 =0000000000000005 R9 =0000000000000000 R10=ffff88801034fa88 R11=63206e6f69737365 R12=ffff888016342510 R13=ffff88801a514b40 R14=ffff88801034fa88 R15=ffff88800ffc8b40 RIP=ffffffff83c20ad8 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 00007f9ca9dd2900 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=00007fd535cc7650 CR3=000000000d6a4000 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=316601863a6724a673470f982163da63 XMM02=000000000011d6f0d59e07bde36eea69 XMM03=000000000011d818ec2efd57dc4c00df XMM04=5ad675eb8067b2e000000000000ae988 XMM05=f8a146e21930f57c0000000000132e10 XMM06=4fda316b135da52b0000000000131c00 XMM07=fb795ef6d65770560000000000121ea8 XMM08=2c67c8bc2e329bc3000000000011d818 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888019dc7960 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888019dc7801 RSI=ffff888019dc7898 RDI=ffff888019dc7898 RBP=ffff888019dc7920 RSP=ffff888019dc7808 R8 =0000000000000001 R9 =ffff888019dc7908 R10=0000000000038001 R11=0000000000006097 R12=ffff888019dc7928 R13=ffff888019dc7910 R14=ffff888019dc7898 R15=ffff888019dc78c8 RIP=ffffffff81131236 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 00007fd535712900 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=00007fd535cca0b0 CR3=000000000e998000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000