syzkaller login: [ 46.942824] BUG: Bad rss-counter state mm:000000005a3638ff type:MM_FILEPAGES val:33 [ 46.944882] BUG: Bad rss-counter state mm:000000005a3638ff type:MM_ANONPAGES val:22 [ 47.114282] ================================================================== [ 47.115386] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.116498] Read of size 8 at addr ffff88800f7f5ed8 by task sshd/219 [ 47.117483] [ 47.117742] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.118689] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.119733] Call Trace: [ 47.120076] [ 47.120379] dump_stack_lvl+0x91/0xf0 [ 47.120901] print_report+0xcc/0x620 [ 47.121421] ? __virt_addr_valid+0x102/0x340 [ 47.122019] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.122701] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.123379] kasan_report+0xbe/0xf0 [ 47.123899] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.124579] vma_interval_tree_remove+0xc75/0xec0 [ 47.125240] vma_prepare+0xc54/0x11a0 [ 47.125826] __split_vma+0x5af/0x950 [ 47.126280] ? __pfx___split_vma+0x10/0x10 [ 47.126802] ? find_held_lock+0x2c/0x110 [ 47.127299] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.127862] ? lock_is_held_type+0x9f/0x120 [ 47.128369] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.128961] ? mtree_range_walk+0x632/0x900 [ 47.129493] ? mas_walk+0x5c7/0x7c0 [ 47.129959] do_vmi_munmap+0x1f1/0x2b0 [ 47.130428] mmap_region+0x1f9/0x2660 [ 47.130901] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.131407] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.132144] ? __pfx_lock_acquire+0x10/0x10 [ 47.132678] ? __pfx_mmap_region+0x10/0x10 [ 47.133218] ? security_mmap_addr+0x7d/0xa0 [ 47.133796] ? get_unmapped_area+0x1f5/0x3f0 [ 47.134357] do_mmap+0x854/0xf00 [ 47.134810] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.135313] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.135904] ksys_mmap_pgoff+0x3af/0x500 [ 47.136414] do_syscall_64+0x3f/0x90 [ 47.136915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.137579] RIP: 0033:0x7f217717dd82 [ 47.138048] 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 [ 47.140178] RSP: 002b:00007ffdd0c91158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.141068] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f217717dd82 [ 47.141903] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f21765b7000 [ 47.142702] RBP: 00007f21765b7000 R08: 0000000000000009 R09: 0000000000001000 [ 47.143509] R10: 0000000000000812 R11: 0000000000000206 R12: 00005644ff5a2ec0 [ 47.144329] R13: 00007ffdd0c91170 R14: 00007ffdd0c911a0 R15: 00007ffdd0c91500 [ 47.145153] [ 47.145450] [ 47.145657] Allocated by task 212: [ 47.146083] kasan_save_stack+0x22/0x50 [ 47.146560] kasan_set_track+0x25/0x30 [ 47.147043] __kasan_slab_alloc+0x59/0x70 [ 47.147538] kmem_cache_alloc+0x16b/0x370 [ 47.148054] vm_area_dup+0x20/0x160 [ 47.148507] __split_vma+0x170/0x950 [ 47.148982] split_vma+0xc6/0x110 [ 47.149443] mprotect_fixup+0x8d2/0xb30 [ 47.149969] do_mprotect_pkey+0x87e/0xd40 [ 47.150488] __x64_sys_mprotect+0x78/0xc0 [ 47.151016] do_syscall_64+0x3f/0x90 [ 47.151490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.152144] [ 47.152357] Freed by task 212: [ 47.152751] kasan_save_stack+0x22/0x50 [ 47.153283] kasan_set_track+0x25/0x30 [ 47.153791] kasan_save_free_info+0x2b/0x50 [ 47.154323] __kasan_slab_free+0x10a/0x190 [ 47.154868] kmem_cache_free+0x10d/0x4d0 [ 47.155380] rcu_core+0x8c8/0x2860 [ 47.155836] __do_softirq+0x1b7/0x7d4 [ 47.156305] [ 47.156519] Last potentially related work creation: [ 47.157121] kasan_save_stack+0x22/0x50 [ 47.157632] __kasan_record_aux_stack+0x8e/0xa0 [ 47.158221] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.158879] remove_vma+0x139/0x170 [ 47.159334] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.159903] do_vmi_munmap+0x1f1/0x2b0 [ 47.160388] __vm_munmap+0x138/0x3a0 [ 47.160867] __x64_sys_munmap+0x59/0x80 [ 47.161378] do_syscall_64+0x3f/0x90 [ 47.161867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.162501] [ 47.162720] The buggy address belongs to the object at ffff88800f7f5e80 [ 47.162720] which belongs to the cache vm_area_struct of size 168 [ 47.164205] The buggy address is located 88 bytes inside of [ 47.164205] freed 168-byte region [ffff88800f7f5e80, ffff88800f7f5f28) [ 47.165644] [ 47.165880] The buggy address belongs to the physical page: [ 47.166524] page:0000000094ed3054 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf7f5 [ 47.167621] memcg:ffff88800d227301 [ 47.168057] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.168682] page_type: 0xffffffff() [ 47.169137] raw: 0100000000000200 ffff88800879fc80 ffffea00003bf4c0 dead000000000008 [ 47.170082] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d227301 [ 47.170995] page dumped because: kasan: bad access detected [ 47.171651] [ 47.171890] Memory state around the buggy address: [ 47.172464] ffff88800f7f5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 47.173339] ffff88800f7f5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 47.174198] >ffff88800f7f5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.175052] ^ [ 47.175805] ffff88800f7f5f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 47.176656] ffff88800f7f5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 47.177526] ================================================================== [ 47.178540] Disabling lock debugging due to kernel taint [ 49.822150] BUG: Bad rss-counter state mm:000000009f229b07 type:MM_FILEPAGES val:33 [ 49.823311] BUG: Bad rss-counter state mm:000000009f229b07 type:MM_ANONPAGES val:22 [ 50.297310] BUG: Bad rss-counter state mm:00000000469da5f1 type:MM_FILEPAGES val:33 [ 50.298321] BUG: Bad rss-counter state mm:00000000469da5f1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28491' (ECDSA) to the list of known hosts. 2023/06/20 02:12:04 fuzzer started 2023/06/20 02:12:04 dialing manager at localhost:44161 2023/06/20 02:12:04 checking machine... 2023/06/20 02:12:04 checking revisions... [ 51.018908] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:12:05 testing simple program... [ 51.068068] cgroup: Unknown subsys name 'net' [ 51.124665] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:11:48 Registers: info registers vcpu 0 RAX=ffffffff8171ac7f RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110028c5ed2 RSI=ffffffff8171ac7f RDI=ffff88801462f700 RBP=ffff88801462f6d0 RSP=ffff88801462f630 R8 =0000000000000001 R9 =ffff88801462f678 R10=0000000000038001 R11=000000000001dda2 R12=ffff88801462f700 R13=0000000000000000 R14=ffff888010180000 R15=0000000000408d40 RIP=ffffffff813ad424 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff9d68f5900 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=00007ff9d5e15000 CR3=000000000f634000 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=00000000000aea284ffd6e6ed60833a3 XMM01=00000000000aec68d3fdd5f48436fbd7 XMM02=00000000000fa0988cdec34d38af4c0a XMM03=00000000000fa558693bd129e125714a XMM04=4ffd6e6ed60833a300000000000ae988 XMM05=19e9129bd510f2350000000000133a68 XMM06=4fda316b135da52b00000000001338f0 XMM07=e042d86d42eb936e00000000001240e0 XMM08=16bea2447f39b4db000000000011c540 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888019376468 RCX=0000000000000000 RDX=1ffff110032120e1 RSI=ffffffff818c833c RDI=ffff888019090708 RBP=ffff8880190905e0 RSP=ffff888018457d10 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888019376280 R13=ffff8880190905e8 R14=0000000040008000 R15=0000000000000000 RIP=ffffffff818c8358 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 00007f76baf06900 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=00007ffddd698000 CR3=0000000009620000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000