[ 31.284365] BUG: Bad rss-counter state mm:00000000e11dc20c type:MM_FILEPAGES val:33 [ 31.285865] BUG: Bad rss-counter state mm:00000000e11dc20c type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.435034] ================================================================== [ 31.436122] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.437235] Read of size 8 at addr ffff88800f5c85c8 by task sshd/226 [ 31.438243] [ 31.438463] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.439317] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.440325] Call Trace: [ 31.440643] [ 31.440924] dump_stack_lvl+0x91/0xf0 [ 31.441418] print_report+0xcc/0x620 [ 31.441898] ? __virt_addr_valid+0x102/0x340 [ 31.442452] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.443068] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.443687] kasan_report+0xbe/0xf0 [ 31.444184] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.444814] vma_interval_tree_remove+0xc75/0xec0 [ 31.445414] vma_prepare+0xc54/0x11a0 [ 31.445897] __split_vma+0x5af/0x950 [ 31.446372] ? __pfx___split_vma+0x10/0x10 [ 31.446901] ? find_held_lock+0x2c/0x110 [ 31.447426] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.448019] ? lock_is_held_type+0x9f/0x120 [ 31.448555] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.449160] ? mtree_range_walk+0x632/0x900 [ 31.449717] ? mas_walk+0x5c7/0x7c0 [ 31.450200] do_vmi_munmap+0x1f1/0x2b0 [ 31.450701] mmap_region+0x1f9/0x2660 [ 31.451186] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.451720] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.452434] ? __pfx_lock_acquire+0x10/0x10 [ 31.452962] ? __pfx_mmap_region+0x10/0x10 [ 31.453494] ? security_mmap_addr+0x7d/0xa0 [ 31.454026] ? get_unmapped_area+0x1f5/0x3f0 [ 31.454576] do_mmap+0x854/0xf00 [ 31.455011] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.455508] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.456078] ksys_mmap_pgoff+0x3af/0x500 [ 31.456598] do_syscall_64+0x3f/0x90 [ 31.457080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.457729] RIP: 0033:0x7fd74b0add82 [ 31.458186] 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 [ 31.460374] RSP: 002b:00007ffcd0bec268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.461298] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd74b0add82 [ 31.462151] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd74a4e7000 [ 31.462993] RBP: 00007fd74a4e7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.463883] R10: 0000000000000812 R11: 0000000000000206 R12: 00005604ab1efec0 [ 31.464790] R13: 00007ffcd0bec280 R14: 00007ffcd0bec2b0 R15: 00007ffcd0bec610 [ 31.465652] [ 31.465948] [ 31.466162] Allocated by task 219: [ 31.466599] kasan_save_stack+0x22/0x50 [ 31.467107] kasan_set_track+0x25/0x30 [ 31.467602] __kasan_slab_alloc+0x59/0x70 [ 31.468149] kmem_cache_alloc+0x16b/0x370 [ 31.468672] vm_area_dup+0x20/0x160 [ 31.469126] __split_vma+0x170/0x950 [ 31.469599] split_vma+0xc6/0x110 [ 31.470042] mprotect_fixup+0x8d2/0xb30 [ 31.470541] do_mprotect_pkey+0x87e/0xd40 [ 31.471060] __x64_sys_mprotect+0x78/0xc0 [ 31.471585] do_syscall_64+0x3f/0x90 [ 31.472088] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.472744] [ 31.472965] Freed by task 219: [ 31.473360] kasan_save_stack+0x22/0x50 [ 31.473903] kasan_set_track+0x25/0x30 [ 31.474466] kasan_save_free_info+0x2b/0x50 [ 31.475006] __kasan_slab_free+0x10a/0x190 [ 31.475546] kmem_cache_free+0x10d/0x4d0 [ 31.476074] rcu_core+0x8c8/0x2860 [ 31.476514] __do_softirq+0x1b7/0x7d4 [ 31.476991] [ 31.477206] Last potentially related work creation: [ 31.477802] kasan_save_stack+0x22/0x50 [ 31.478309] __kasan_record_aux_stack+0x8e/0xa0 [ 31.478949] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.479605] remove_vma+0x139/0x170 [ 31.480108] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.480670] do_vmi_munmap+0x1f1/0x2b0 [ 31.481154] __vm_munmap+0x138/0x3a0 [ 31.481620] __x64_sys_munmap+0x59/0x80 [ 31.482121] do_syscall_64+0x3f/0x90 [ 31.482590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.483229] [ 31.483444] The buggy address belongs to the object at ffff88800f5c8570 [ 31.483444] which belongs to the cache vm_area_struct of size 168 [ 31.484933] The buggy address is located 88 bytes inside of [ 31.484933] freed 168-byte region [ffff88800f5c8570, ffff88800f5c8618) [ 31.486350] [ 31.486564] The buggy address belongs to the physical page: [ 31.487223] page:00000000eddf309f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf5c8 [ 31.488313] memcg:ffff88800f6aac01 [ 31.488747] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.489390] page_type: 0xffffffff() [ 31.489841] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.490767] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6aac01 [ 31.491687] page dumped because: kasan: bad access detected [ 31.492365] [ 31.492581] Memory state around the buggy address: [ 31.493167] ffff88800f5c8480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.494026] ffff88800f5c8500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.494897] >ffff88800f5c8580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.495753] ^ [ 31.496422] ffff88800f5c8600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.497282] ffff88800f5c8680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.498129] ================================================================== [ 31.499058] Disabling lock debugging due to kernel taint [ 33.276010] BUG: Bad rss-counter state mm:000000000b42a98f type:MM_FILEPAGES val:33 [ 33.277116] BUG: Bad rss-counter state mm:000000000b42a98f type:MM_ANONPAGES val:22 [ 33.804775] BUG: Bad rss-counter state mm:00000000b41da4fd type:MM_FILEPAGES val:33 [ 33.805963] BUG: Bad rss-counter state mm:00000000b41da4fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31205' (ECDSA) to the list of known hosts. 2023/06/20 12:49:20 fuzzer started 2023/06/20 12:49:21 dialing manager at localhost:36067 2023/06/20 12:49:21 checking machine... 2023/06/20 12:49:21 checking revisions... [ 34.455940] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:49:21 testing simple program... [ 34.498204] cgroup: Unknown subsys name 'net' [ 34.553821] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:49:20 Registers: info registers vcpu 0 RAX=ffff8880194fa000 RBX=0000000000000009 RCX=ffffffff8386f448 RDX=0000000000000000 RSI=0000000000000009 RDI=0000000000000010 RBP=ffff88800fdc7d90 RSP=ffff88800fdc7c90 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffff8880194fa6b8 R15=ffff8880194fa000 RIP=ffffffff814c03d8 RFL=00000046 [---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 00007fb88c043900 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=00007fff49280000 CR3=000000000ebaa000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f7542ff2940 CR3=0000000019966000 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=2030323a39343a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a39343a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000