syzkaller login: [ 40.582147] BUG: Bad rss-counter state mm:000000001669825f type:MM_FILEPAGES val:33 [ 40.583432] BUG: Bad rss-counter state mm:000000001669825f type:MM_ANONPAGES val:22 [ 40.739306] ================================================================== [ 40.740527] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.741635] Read of size 8 at addr ffff88800ef604e0 by task sshd/219 [ 40.742227] [ 40.742394] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.743060] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.743809] Call Trace: [ 40.744052] [ 40.744269] dump_stack_lvl+0x91/0xf0 [ 40.744651] print_report+0xcc/0x620 [ 40.745015] ? __virt_addr_valid+0x102/0x340 [ 40.745436] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.745907] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.746377] kasan_report+0xbe/0xf0 [ 40.746758] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.747242] vma_interval_tree_remove+0xc75/0xec0 [ 40.747700] vma_prepare+0xc54/0x11a0 [ 40.748063] __split_vma+0x5af/0x950 [ 40.748422] ? __pfx___split_vma+0x10/0x10 [ 40.748832] ? find_held_lock+0x2c/0x110 [ 40.749229] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.749659] ? lock_is_held_type+0x9f/0x120 [ 40.750067] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.750553] ? mtree_range_walk+0x632/0x900 [ 40.750974] ? mas_walk+0x5c7/0x7c0 [ 40.751338] do_vmi_munmap+0x1f1/0x2b0 [ 40.751712] mmap_region+0x1f9/0x2660 [ 40.752076] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.752464] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.753009] ? __pfx_lock_acquire+0x10/0x10 [ 40.753415] ? __pfx_mmap_region+0x10/0x10 [ 40.753826] ? security_mmap_addr+0x7d/0xa0 [ 40.754229] ? get_unmapped_area+0x1f5/0x3f0 [ 40.754654] do_mmap+0x854/0xf00 [ 40.754988] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.755367] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.755794] ksys_mmap_pgoff+0x3af/0x500 [ 40.756185] do_syscall_64+0x3f/0x90 [ 40.756548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.757040] RIP: 0033:0x7ff4506e1d82 [ 40.757387] 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 [ 40.759012] RSP: 002b:00007ffed20dd5f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.759702] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff4506e1d82 [ 40.760341] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff44fb1b000 [ 40.760979] RBP: 00007ff44fb1b000 R08: 0000000000000009 R09: 0000000000001000 [ 40.761620] R10: 0000000000000812 R11: 0000000000000206 R12: 00005571f136ef70 [ 40.762260] R13: 00007ffed20dd610 R14: 00007ffed20dd640 R15: 00007ffed20dd9a0 [ 40.762933] [ 40.763155] [ 40.763318] Allocated by task 212: [ 40.763643] kasan_save_stack+0x22/0x50 [ 40.764021] kasan_set_track+0x25/0x30 [ 40.764397] __kasan_slab_alloc+0x59/0x70 [ 40.764801] kmem_cache_alloc+0x16b/0x370 [ 40.765194] vm_area_dup+0x20/0x160 [ 40.765544] __split_vma+0x170/0x950 [ 40.765900] split_vma+0xc6/0x110 [ 40.766240] mprotect_fixup+0x8d2/0xb30 [ 40.766631] do_mprotect_pkey+0x87e/0xd40 [ 40.767031] __x64_sys_mprotect+0x78/0xc0 [ 40.767428] do_syscall_64+0x3f/0x90 [ 40.767788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.768277] [ 40.768440] Freed by task 212: [ 40.768743] kasan_save_stack+0x22/0x50 [ 40.769131] kasan_set_track+0x25/0x30 [ 40.769505] kasan_save_free_info+0x2b/0x50 [ 40.769908] __kasan_slab_free+0x10a/0x190 [ 40.770312] kmem_cache_free+0x10d/0x4d0 [ 40.770715] rcu_core+0x8c8/0x2860 [ 40.771054] __do_softirq+0x1b7/0x7d4 [ 40.771417] [ 40.771580] Last potentially related work creation: [ 40.772024] kasan_save_stack+0x22/0x50 [ 40.772409] __kasan_record_aux_stack+0x8e/0xa0 [ 40.772854] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.773347] remove_vma+0x139/0x170 [ 40.773693] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.774117] do_vmi_munmap+0x1f1/0x2b0 [ 40.774489] __vm_munmap+0x138/0x3a0 [ 40.774855] __x64_sys_munmap+0x59/0x80 [ 40.775241] do_syscall_64+0x3f/0x90 [ 40.775615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.776100] [ 40.776267] Second to last potentially related work creation: [ 40.776791] kasan_save_stack+0x22/0x50 [ 40.777175] __kasan_record_aux_stack+0x8e/0xa0 [ 40.777617] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.778109] remove_vma+0x139/0x170 [ 40.778453] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.778882] do_vmi_munmap+0x1f1/0x2b0 [ 40.779250] mmap_region+0x1f9/0x2660 [ 40.779614] do_mmap+0x854/0xf00 [ 40.779940] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.780311] ksys_mmap_pgoff+0x3af/0x500 [ 40.780694] do_syscall_64+0x3f/0x90 [ 40.781056] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.781632] [ 40.781798] The buggy address belongs to the object at ffff88800ef60488 [ 40.781798] which belongs to the cache vm_area_struct of size 168 [ 40.782933] The buggy address is located 88 bytes inside of [ 40.782933] freed 168-byte region [ffff88800ef60488, ffff88800ef60530) [ 40.784005] [ 40.784168] The buggy address belongs to the physical page: [ 40.784674] page:00000000678b059c refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800ef60910 pfn:0xef60 [ 40.785617] memcg:ffff88800d51b901 [ 40.785941] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.786469] page_type: 0xffffffff() [ 40.786822] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 40.787519] raw: ffff88800ef60910 000000008011000b 00000001ffffffff ffff88800d51b901 [ 40.788215] page dumped because: kasan: bad access detected [ 40.788719] [ 40.788884] Memory state around the buggy address: [ 40.789325] ffff88800ef60380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 40.789978] ffff88800ef60400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 40.790651] >ffff88800ef60480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.791299] ^ [ 40.791884] ffff88800ef60500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fb fb [ 40.792539] ffff88800ef60580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.793191] ================================================================== [ 40.793928] Disabling lock debugging due to kernel taint [ 42.777332] BUG: Bad rss-counter state mm:000000006c8285e7 type:MM_FILEPAGES val:33 [ 42.778601] BUG: Bad rss-counter state mm:000000006c8285e7 type:MM_ANONPAGES val:22 [ 43.256458] BUG: Bad rss-counter state mm:00000000c22ede3d type:MM_FILEPAGES val:33 [ 43.257661] BUG: Bad rss-counter state mm:00000000c22ede3d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51888' (ECDSA) to the list of known hosts. 2023/06/19 23:28:05 fuzzer started 2023/06/19 23:28:05 dialing manager at localhost:44161 2023/06/19 23:28:05 checking machine... 2023/06/19 23:28:05 checking revisions... [ 43.974012] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:28:06 testing simple program... [ 44.021743] cgroup: Unknown subsys name 'net' [ 44.073415] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:28:03 Registers: info registers vcpu 0 RAX=0100000000000200 RBX=0000000000000200 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=00000000ffffffff RDI=ffffffff81806ea9 RBP=ffff88801476f5f0 RSP=ffff88801476f530 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=ffffffff81806df1 R12=ffff88800844f780 R13=ffff88806ce3de20 R14=ffff88806ce3de20 R15=ffff88806ce3de00 RIP=ffffffff81806c43 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 00007fe7152bf900 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=00007fe7146df800 CR3=000000000c558000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=6db2535bb302d40d00000000000ae988 XMM05=cb66f2cf3a2665740000000000136cd0 XMM06=dfcdbad4f1609c370000000000135818 XMM07=fb795ef6d65770560000000000124c80 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000038000 RBX=0000000000000001 RCX=ffffffff846000a9 RDX=dffffc0000000000 RSI=0000000000036000 RDI=ffff8880147d7a40 RBP=ffff8880147d7a98 RSP=ffff8880147d79d0 R8 =0000000000000001 R9 =ffff8880147d7a80 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff8880147d7aa0 R13=ffff8880147d7a88 R14=ffff8880147d7a81 R15=ffff8880147d7a40 RIP=ffffffff81130754 RFL=00000287 [--S--PC] 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 00007fd505e87900 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=00007ffd960b8000 CR3=000000000ea08000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000