syzkaller login: [ 31.534440] BUG: Bad rss-counter state mm:00000000d4458cc3 type:MM_FILEPAGES val:33 [ 31.535918] BUG: Bad rss-counter state mm:00000000d4458cc3 type:MM_ANONPAGES val:22 [ 31.697210] ================================================================== [ 31.698124] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.699065] Read of size 8 at addr ffff888019e83d08 by task sshd/220 [ 31.699850] [ 31.700073] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.701130] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.702125] Call Trace: [ 31.702448] [ 31.702746] dump_stack_lvl+0x91/0xf0 [ 31.703261] print_report+0xcc/0x620 [ 31.703744] ? __virt_addr_valid+0x102/0x340 [ 31.704316] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.704955] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.705590] kasan_report+0xbe/0xf0 [ 31.706079] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.706718] vma_interval_tree_remove+0xc75/0xec0 [ 31.707343] vma_prepare+0xc54/0x11a0 [ 31.707834] __split_vma+0x5af/0x950 [ 31.708328] ? __pfx___split_vma+0x10/0x10 [ 31.708873] ? find_held_lock+0x2c/0x110 [ 31.709420] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.709996] ? lock_is_held_type+0x9f/0x120 [ 31.710546] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.711164] ? mtree_range_walk+0x632/0x900 [ 31.711720] ? mas_walk+0x5c7/0x7c0 [ 31.712207] do_vmi_munmap+0x1f1/0x2b0 [ 31.712709] mmap_region+0x1f9/0x2660 [ 31.713212] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.713736] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.714474] ? __pfx_lock_acquire+0x10/0x10 [ 31.715026] ? __pfx_mmap_region+0x10/0x10 [ 31.715567] ? security_mmap_addr+0x7d/0xa0 [ 31.716113] ? get_unmapped_area+0x1f5/0x3f0 [ 31.716688] do_mmap+0x854/0xf00 [ 31.717162] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.717660] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.718239] ksys_mmap_pgoff+0x3af/0x500 [ 31.718764] do_syscall_64+0x3f/0x90 [ 31.719259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.719929] RIP: 0033:0x7f4da4a19d82 [ 31.720396] 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 [ 31.722562] RSP: 002b:00007fff0c8b0378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.723481] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4da4a19d82 [ 31.724341] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4da3e53000 [ 31.725212] RBP: 00007f4da3e53000 R08: 0000000000000009 R09: 0000000000001000 [ 31.726080] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bcacd19f70 [ 31.726929] R13: 00007fff0c8b0390 R14: 00007fff0c8b03c0 R15: 00007fff0c8b0720 [ 31.727790] [ 31.728082] [ 31.728304] Allocated by task 213: [ 31.728761] kasan_save_stack+0x22/0x50 [ 31.729297] kasan_set_track+0x25/0x30 [ 31.729801] __kasan_slab_alloc+0x59/0x70 [ 31.730325] kmem_cache_alloc+0x16b/0x370 [ 31.730847] vm_area_dup+0x20/0x160 [ 31.731318] __split_vma+0x170/0x950 [ 31.731802] split_vma+0xc6/0x110 [ 31.732254] mprotect_fixup+0x8d2/0xb30 [ 31.732774] do_mprotect_pkey+0x87e/0xd40 [ 31.733307] __x64_sys_mprotect+0x78/0xc0 [ 31.733849] do_syscall_64+0x3f/0x90 [ 31.734334] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.734994] [ 31.735210] Freed by task 213: [ 31.735613] kasan_save_stack+0x22/0x50 [ 31.736132] kasan_set_track+0x25/0x30 [ 31.736647] kasan_save_free_info+0x2b/0x50 [ 31.737222] __kasan_slab_free+0x10a/0x190 [ 31.737798] kmem_cache_free+0x10d/0x4d0 [ 31.738315] rcu_core+0x8c8/0x2860 [ 31.738770] __do_softirq+0x1b7/0x7d4 [ 31.739240] [ 31.739454] Last potentially related work creation: [ 31.740040] kasan_save_stack+0x22/0x50 [ 31.740551] __kasan_record_aux_stack+0x8e/0xa0 [ 31.741147] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.741854] remove_vma+0x139/0x170 [ 31.742330] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.742893] do_vmi_munmap+0x1f1/0x2b0 [ 31.743385] __vm_munmap+0x138/0x3a0 [ 31.743864] __x64_sys_munmap+0x59/0x80 [ 31.744367] do_syscall_64+0x3f/0x90 [ 31.744860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.745531] [ 31.745750] The buggy address belongs to the object at ffff888019e83cb0 [ 31.745750] which belongs to the cache vm_area_struct of size 168 [ 31.747229] The buggy address is located 88 bytes inside of [ 31.747229] freed 168-byte region [ffff888019e83cb0, ffff888019e83d58) [ 31.748643] [ 31.748859] The buggy address belongs to the physical page: [ 31.749540] page:0000000058a3ad67 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e83 [ 31.750634] memcg:ffff888019db9e01 [ 31.751070] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.751718] page_type: 0xffffffff() [ 31.752170] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.753092] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019db9e01 [ 31.754013] page dumped because: kasan: bad access detected [ 31.754679] [ 31.754897] Memory state around the buggy address: [ 31.755490] ffff888019e83c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.756359] ffff888019e83c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.757241] >ffff888019e83d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.758092] ^ [ 31.758535] ffff888019e83d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.759387] ffff888019e83e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.760246] ================================================================== [ 31.761258] Disabling lock debugging due to kernel taint [ 33.737657] BUG: Bad rss-counter state mm:0000000041b242be type:MM_FILEPAGES val:33 [ 33.738650] BUG: Bad rss-counter state mm:0000000041b242be type:MM_ANONPAGES val:22 [ 34.239506] BUG: Bad rss-counter state mm:000000003cf85dec type:MM_FILEPAGES val:33 [ 34.241159] BUG: Bad rss-counter state mm:000000003cf85dec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50949' (ECDSA) to the list of known hosts. 2023/06/20 07:42:26 fuzzer started 2023/06/20 07:42:26 dialing manager at localhost:44161 2023/06/20 07:42:26 checking machine... 2023/06/20 07:42:26 checking revisions... [ 34.971417] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:42:26 testing simple program... [ 35.020842] cgroup: Unknown subsys name 'net' [ 35.065547] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:42:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff812d869a RDX=1ffff1100d9c5856 RSI=0000000000000008 RDI=ffffffff8709c000 RBP=1ffff1100d9c13e7 RSP=ffff88806ce09f00 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450b4cc RFL=00000082 [--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 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=00007ffe6a5df9d8 CR3=0000000015b0a000 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=2036323a32343a3730203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a32343a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=00007fe5fc4daa00 RCX=ffffffff813a0ac9 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff88801470f430 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6c88 R12=0000000000000000 R13=0000000000000000 R14=ffff8880102151c0 R15=0000000000000000 RIP=ffffffff814c01d0 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe5fb956900 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=00007fe5fadb4520 CR3=000000000c624000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=de1b71c63474bc4a00000000000ae988 XMM05=6a849b36d82fa19b0000000000134f50 XMM06=19e9129bd510f2350000000000133de8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000