syzkaller login: [ 30.575887] BUG: Bad rss-counter state mm:00000000c9c0e51c type:MM_FILEPAGES val:33 [ 30.576895] BUG: Bad rss-counter state mm:00000000c9c0e51c type:MM_ANONPAGES val:22 [ 30.734968] ================================================================== [ 30.735921] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.736899] Read of size 8 at addr ffff88800e55e5c8 by task sshd/221 [ 30.737695] [ 30.737940] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.739074] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.740245] Call Trace: [ 30.740628] [ 30.740967] dump_stack_lvl+0x91/0xf0 [ 30.741565] print_report+0xcc/0x620 [ 30.742150] ? __virt_addr_valid+0x102/0x340 [ 30.742831] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.743564] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.744181] kasan_report+0xbe/0xf0 [ 30.744658] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.745297] vma_interval_tree_remove+0xc75/0xec0 [ 30.745908] vma_prepare+0xc54/0x11a0 [ 30.746424] __split_vma+0x5af/0x950 [ 30.747038] ? __pfx___split_vma+0x10/0x10 [ 30.747765] ? find_held_lock+0x2c/0x110 [ 30.748488] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.749259] ? lock_is_held_type+0x9f/0x120 [ 30.750017] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.750889] ? mtree_range_walk+0x632/0x900 [ 30.751653] ? mas_walk+0x5c7/0x7c0 [ 30.752306] do_vmi_munmap+0x1f1/0x2b0 [ 30.752984] mmap_region+0x1f9/0x2660 [ 30.753656] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.754363] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.755362] ? __pfx_lock_acquire+0x10/0x10 [ 30.756105] ? __pfx_mmap_region+0x10/0x10 [ 30.756836] ? security_mmap_addr+0x7d/0xa0 [ 30.757568] ? get_unmapped_area+0x1f5/0x3f0 [ 30.758329] do_mmap+0x854/0xf00 [ 30.758953] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.759637] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.760414] ksys_mmap_pgoff+0x3af/0x500 [ 30.761117] do_syscall_64+0x3f/0x90 [ 30.761779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.762705] RIP: 0033:0x7f33edf1cd82 [ 30.763338] 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 [ 30.766279] RSP: 002b:00007fffeb63ccf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.767548] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f33edf1cd82 [ 30.768727] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f33ed356000 [ 30.769909] RBP: 00007f33ed356000 R08: 0000000000000009 R09: 0000000000001000 [ 30.771093] R10: 0000000000000812 R11: 0000000000000206 R12: 000056418daa9f70 [ 30.772269] R13: 00007fffeb63cd10 R14: 00007fffeb63cd40 R15: 00007fffeb63d0a0 [ 30.773453] [ 30.773857] [ 30.774151] Allocated by task 214: [ 30.774798] kasan_save_stack+0x22/0x50 [ 30.775462] kasan_set_track+0x25/0x30 [ 30.776118] __kasan_slab_alloc+0x59/0x70 [ 30.776811] kmem_cache_alloc+0x16b/0x370 [ 30.777496] vm_area_dup+0x20/0x160 [ 30.778090] __split_vma+0x170/0x950 [ 30.778720] split_vma+0xc6/0x110 [ 30.779308] mprotect_fixup+0x8d2/0xb30 [ 30.780047] do_mprotect_pkey+0x87e/0xd40 [ 30.780732] __x64_sys_mprotect+0x78/0xc0 [ 30.781416] do_syscall_64+0x3f/0x90 [ 30.782046] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.782912] [ 30.783198] Freed by task 214: [ 30.783697] kasan_save_stack+0x22/0x50 [ 30.784232] kasan_set_track+0x25/0x30 [ 30.784761] kasan_save_free_info+0x2b/0x50 [ 30.785322] __kasan_slab_free+0x10a/0x190 [ 30.785880] kmem_cache_free+0x10d/0x4d0 [ 30.786419] rcu_core+0x8c8/0x2860 [ 30.786902] __do_softirq+0x1b7/0x7d4 [ 30.787408] [ 30.787633] Last potentially related work creation: [ 30.788245] kasan_save_stack+0x22/0x50 [ 30.788772] __kasan_record_aux_stack+0x8e/0xa0 [ 30.789379] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.790058] remove_vma+0x139/0x170 [ 30.790531] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.791144] do_vmi_munmap+0x1f1/0x2b0 [ 30.791658] __vm_munmap+0x138/0x3a0 [ 30.792153] __x64_sys_munmap+0x59/0x80 [ 30.792675] do_syscall_64+0x3f/0x90 [ 30.793182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.793862] [ 30.794089] Second to last potentially related work creation: [ 30.794835] kasan_save_stack+0x22/0x50 [ 30.795370] __kasan_record_aux_stack+0x8e/0xa0 [ 30.795984] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.796666] remove_vma+0x139/0x170 [ 30.797145] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.797731] do_vmi_munmap+0x1f1/0x2b0 [ 30.798243] mmap_region+0x1f9/0x2660 [ 30.798754] do_mmap+0x854/0xf00 [ 30.799204] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.799724] ksys_mmap_pgoff+0x3af/0x500 [ 30.800252] do_syscall_64+0x3f/0x90 [ 30.800763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.801440] [ 30.801672] The buggy address belongs to the object at ffff88800e55e570 [ 30.801672] which belongs to the cache vm_area_struct of size 168 [ 30.803240] The buggy address is located 88 bytes inside of [ 30.803240] freed 168-byte region [ffff88800e55e570, ffff88800e55e618) [ 30.804735] [ 30.804966] The buggy address belongs to the physical page: [ 30.805669] page:000000008ab0e18f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe55e [ 30.806827] memcg:ffff88800e487101 [ 30.807279] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.808013] page_type: 0xffffffff() [ 30.808493] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bc340 dead000000000003 [ 30.809465] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e487101 [ 30.810418] page dumped because: kasan: bad access detected [ 30.811138] [ 30.811367] Memory state around the buggy address: [ 30.811986] ffff88800e55e480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.812894] ffff88800e55e500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.813799] >ffff88800e55e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.814721] ^ [ 30.815426] ffff88800e55e600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.816334] ffff88800e55e680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.817233] ================================================================== [ 30.818211] Disabling lock debugging due to kernel taint [ 32.956689] BUG: Bad rss-counter state mm:00000000870ac8ba type:MM_FILEPAGES val:33 [ 32.957883] BUG: Bad rss-counter state mm:00000000870ac8ba type:MM_ANONPAGES val:22 [ 33.347537] BUG: Bad rss-counter state mm:0000000017f39d3f type:MM_FILEPAGES val:33 [ 33.348734] BUG: Bad rss-counter state mm:0000000017f39d3f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5591' (ECDSA) to the list of known hosts. 2023/06/20 13:13:10 fuzzer started 2023/06/20 13:13:10 dialing manager at localhost:36067 2023/06/20 13:13:10 checking machine... 2023/06/20 13:13:10 checking revisions... [ 34.109500] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:13:10 testing simple program... [ 34.149741] cgroup: Unknown subsys name 'net' [ 34.197678] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:13:10 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f78d3eafa80 CR3=000000000f058000 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=2039303a33313a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a33313a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880146df640 RCX=0000000000000002 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff8880146df600 RBP=ffff8880162b51c0 RSP=ffff8880146df550 R8 =0000000000000140 R9 =0000000000000000 R10=ffff8880146df5a8 R11=00000000000b6a61 R12=0000000000000000 R13=ffff8880146df5d0 R14=ffff8880162b51c0 R15=ffff8880146df5a8 RIP=ffffffff84513445 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 00007fbcede2b900 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=00007ffc8990e000 CR3=000000000ef8a000 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=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000