syzkaller login: [ 30.700710] BUG: Bad rss-counter state mm:000000007f2814b1 type:MM_FILEPAGES val:33 [ 30.701949] BUG: Bad rss-counter state mm:000000007f2814b1 type:MM_ANONPAGES val:22 [ 30.751180] ================================================================== [ 30.752080] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.753012] Read of size 8 at addr ffff88800f29b228 by task sshd/220 [ 30.753793] [ 30.754014] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.754907] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.755917] Call Trace: [ 30.756247] [ 30.756536] dump_stack_lvl+0x91/0xf0 [ 30.757035] print_report+0xcc/0x620 [ 30.757537] ? __virt_addr_valid+0x102/0x340 [ 30.758096] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.758752] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.759378] kasan_report+0xbe/0xf0 [ 30.759860] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.760488] vma_interval_tree_remove+0xc75/0xec0 [ 30.761096] vma_prepare+0xc54/0x11a0 [ 30.761571] __split_vma+0x5af/0x950 [ 30.762040] ? __pfx___split_vma+0x10/0x10 [ 30.762580] ? find_held_lock+0x2c/0x110 [ 30.763105] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.763680] ? lock_is_held_type+0x9f/0x120 [ 30.764222] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.764835] ? mtree_range_walk+0x632/0x900 [ 30.765383] ? mas_walk+0x5c7/0x7c0 [ 30.765857] do_vmi_munmap+0x1f1/0x2b0 [ 30.766350] mmap_region+0x1f9/0x2660 [ 30.766849] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.767359] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.768071] ? __pfx_lock_acquire+0x10/0x10 [ 30.768609] ? __pfx_mmap_region+0x10/0x10 [ 30.769140] ? security_mmap_addr+0x7d/0xa0 [ 30.769675] ? get_unmapped_area+0x1f5/0x3f0 [ 30.770224] do_mmap+0x854/0xf00 [ 30.770676] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.771174] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.771739] ksys_mmap_pgoff+0x3af/0x500 [ 30.772248] do_syscall_64+0x3f/0x90 [ 30.772725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.773373] RIP: 0033:0x7f257aa94d82 [ 30.773829] 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 [ 30.775955] RSP: 002b:00007ffda878cb58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.776862] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f257aa94d82 [ 30.777706] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2579ece000 [ 30.778548] RBP: 00007f2579ece000 R08: 0000000000000009 R09: 0000000000001000 [ 30.779418] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c519beec0 [ 30.780270] R13: 00007ffda878cb70 R14: 00007ffda878cba0 R15: 00007ffda878cf00 [ 30.781132] [ 30.781426] [ 30.781640] Allocated by task 213: [ 30.782068] kasan_save_stack+0x22/0x50 [ 30.782585] kasan_set_track+0x25/0x30 [ 30.783077] __kasan_slab_alloc+0x59/0x70 [ 30.783610] kmem_cache_alloc+0x16b/0x370 [ 30.784129] vm_area_dup+0x20/0x160 [ 30.784580] __split_vma+0x170/0x950 [ 30.785053] split_vma+0xc6/0x110 [ 30.785493] mprotect_fixup+0x8d2/0xb30 [ 30.785994] do_mprotect_pkey+0x87e/0xd40 [ 30.786514] __x64_sys_mprotect+0x78/0xc0 [ 30.787056] do_syscall_64+0x3f/0x90 [ 30.787532] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.788183] [ 30.788398] Freed by task 213: [ 30.788792] kasan_save_stack+0x22/0x50 [ 30.789409] kasan_set_track+0x25/0x30 [ 30.789907] kasan_save_free_info+0x2b/0x50 [ 30.790442] __kasan_slab_free+0x10a/0x190 [ 30.790989] kmem_cache_free+0x10d/0x4d0 [ 30.791505] rcu_core+0x8c8/0x2860 [ 30.791959] __do_softirq+0x1b7/0x7d4 [ 30.792437] [ 30.792651] Last potentially related work creation: [ 30.793242] kasan_save_stack+0x22/0x50 [ 30.793753] __kasan_record_aux_stack+0x8e/0xa0 [ 30.794333] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.794991] remove_vma+0x139/0x170 [ 30.795443] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.795999] do_vmi_munmap+0x1f1/0x2b0 [ 30.796484] __vm_munmap+0x138/0x3a0 [ 30.796949] __x64_sys_munmap+0x59/0x80 [ 30.797451] do_syscall_64+0x3f/0x90 [ 30.797928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.798570] [ 30.798810] The buggy address belongs to the object at ffff88800f29b1d0 [ 30.798810] which belongs to the cache vm_area_struct of size 168 [ 30.800277] The buggy address is located 88 bytes inside of [ 30.800277] freed 168-byte region [ffff88800f29b1d0, ffff88800f29b278) [ 30.801682] [ 30.801897] The buggy address belongs to the physical page: [ 30.802554] page:00000000efe5cc70 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf29b [ 30.803644] memcg:ffff88800d5eee01 [ 30.804072] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.804788] page_type: 0xffffffff() [ 30.805240] raw: 0100000000000200 ffff8880087a0c80 ffffea0000398600 dead000000000003 [ 30.806160] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5eee01 [ 30.807072] page dumped because: kasan: bad access detected [ 30.807725] [ 30.807940] Memory state around the buggy address: [ 30.808520] ffff88800f29b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.809384] ffff88800f29b180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.810244] >ffff88800f29b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.811139] ^ [ 30.811697] ffff88800f29b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.812562] ffff88800f29b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.813438] ================================================================== [ 30.814380] Disabling lock debugging due to kernel taint [ 32.884160] BUG: Bad rss-counter state mm:00000000fcc14ba3 type:MM_FILEPAGES val:33 [ 32.885843] BUG: Bad rss-counter state mm:00000000fcc14ba3 type:MM_ANONPAGES val:22 [ 33.395884] BUG: Bad rss-counter state mm:000000007428f5f7 type:MM_FILEPAGES val:33 [ 33.397204] BUG: Bad rss-counter state mm:000000007428f5f7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5723' (ECDSA) to the list of known hosts. 2023/06/20 22:41:47 fuzzer started 2023/06/20 22:41:48 dialing manager at localhost:36067 2023/06/20 22:41:48 checking machine... 2023/06/20 22:41:48 checking revisions... [ 34.062295] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:41:48 testing simple program... [ 34.115364] cgroup: Unknown subsys name 'net' [ 34.160473] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:41:47 Registers: info registers vcpu 0 RAX=000000000000000c RBX=0000000000000001 RCX=ffffffff818e31f6 RDX=000000000000000c RSI=ffffffff8614eccc RDI=ffffffff85e0c99c RBP=ffff88800fd87950 RSP=ffff88800fd87850 R8 =ffffffff8614eccc R9 =ffff88800fd87938 R10=0000000000038001 R11=00000000000247f6 R12=ffffffff85e0c9c8 R13=ffff88800fd87940 R14=ffff88800fd87939 R15=ffff88800fd878f8 RIP=ffffffff8112fc21 RFL=00000216 [----AP-] 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 00007f1833d27900 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=00007ffff4d72000 CR3=000000000e41c000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100d9e13a3 RSP=ffff88806cf09cf8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800e742868 R13=ffffffff818468a3 R14=ffffffff8186b835 R15=ffff888016422680 RIP=ffffffff8135b960 RFL=00000016 [----AP-] 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 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=00007f0890fa6580 CR3=000000000cbf2000 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=2037343a31343a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a31343a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000