syzkaller login: [ 31.210274] BUG: Bad rss-counter state mm:00000000cd582686 type:MM_FILEPAGES val:33 [ 31.211289] BUG: Bad rss-counter state mm:00000000cd582686 type:MM_ANONPAGES val:22 [ 31.391415] ================================================================== [ 31.392468] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.393626] Read of size 8 at addr ffff888014645798 by task sshd/220 [ 31.394448] [ 31.394687] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.395639] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.396680] Call Trace: [ 31.397019] [ 31.397326] dump_stack_lvl+0x91/0xf0 [ 31.397868] print_report+0xcc/0x620 [ 31.398394] ? __virt_addr_valid+0x102/0x340 [ 31.398990] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.399677] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.400335] kasan_report+0xbe/0xf0 [ 31.400849] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.401521] vma_interval_tree_remove+0xc75/0xec0 [ 31.402177] vma_prepare+0xc54/0x11a0 [ 31.402692] __split_vma+0x5af/0x950 [ 31.403211] ? __pfx___split_vma+0x10/0x10 [ 31.403815] ? find_held_lock+0x2c/0x110 [ 31.404374] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.404980] ? lock_is_held_type+0x9f/0x120 [ 31.405550] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.406202] ? mtree_range_walk+0x632/0x900 [ 31.406786] ? mas_walk+0x5c7/0x7c0 [ 31.407304] do_vmi_munmap+0x1f1/0x2b0 [ 31.407839] mmap_region+0x1f9/0x2660 [ 31.408357] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.408905] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.409663] ? __pfx_lock_acquire+0x10/0x10 [ 31.410229] ? __pfx_mmap_region+0x10/0x10 [ 31.410796] ? security_mmap_addr+0x7d/0xa0 [ 31.411379] ? get_unmapped_area+0x1f5/0x3f0 [ 31.411968] do_mmap+0x854/0xf00 [ 31.412434] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.412966] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.413587] ksys_mmap_pgoff+0x3af/0x500 [ 31.414155] do_syscall_64+0x3f/0x90 [ 31.414683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.415411] RIP: 0033:0x7f6de9926d82 [ 31.415912] 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 [ 31.418272] RSP: 002b:00007fff705a67b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.419266] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6de9926d82 [ 31.420198] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6de8d60000 [ 31.421128] RBP: 00007f6de8d60000 R08: 0000000000000009 R09: 0000000000001000 [ 31.422064] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b8f2b68d90 [ 31.423002] R13: 00007fff705a67d0 R14: 00007fff705a6800 R15: 00007fff705a6b60 [ 31.423972] [ 31.424296] [ 31.424534] Allocated by task 213: [ 31.425010] kasan_save_stack+0x22/0x50 [ 31.425571] kasan_set_track+0x25/0x30 [ 31.426115] __kasan_slab_alloc+0x59/0x70 [ 31.426688] kmem_cache_alloc+0x16b/0x370 [ 31.427264] vm_area_dup+0x20/0x160 [ 31.427756] __split_vma+0x170/0x950 [ 31.428269] split_vma+0xc6/0x110 [ 31.428755] mprotect_fixup+0x8d2/0xb30 [ 31.429310] do_mprotect_pkey+0x87e/0xd40 [ 31.429887] __x64_sys_mprotect+0x78/0xc0 [ 31.430459] do_syscall_64+0x3f/0x90 [ 31.430971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.431688] [ 31.431921] Freed by task 213: [ 31.432352] kasan_save_stack+0x22/0x50 [ 31.432901] kasan_set_track+0x25/0x30 [ 31.433442] kasan_save_free_info+0x2b/0x50 [ 31.434021] __kasan_slab_free+0x10a/0x190 [ 31.434675] kmem_cache_free+0x10d/0x4d0 [ 31.435246] rcu_core+0x8c8/0x2860 [ 31.435732] __do_softirq+0x1b7/0x7d4 [ 31.436261] [ 31.436498] Last potentially related work creation: [ 31.437147] kasan_save_stack+0x22/0x50 [ 31.437694] __kasan_record_aux_stack+0x8e/0xa0 [ 31.438316] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.439029] remove_vma+0x139/0x170 [ 31.439546] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.440151] do_vmi_munmap+0x1f1/0x2b0 [ 31.440682] __vm_munmap+0x138/0x3a0 [ 31.441185] __x64_sys_munmap+0x59/0x80 [ 31.441724] do_syscall_64+0x3f/0x90 [ 31.442237] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.442937] [ 31.443179] The buggy address belongs to the object at ffff888014645740 [ 31.443179] which belongs to the cache vm_area_struct of size 168 [ 31.444803] The buggy address is located 88 bytes inside of [ 31.444803] freed 168-byte region [ffff888014645740, ffff8880146457e8) [ 31.446346] [ 31.446583] The buggy address belongs to the physical page: [ 31.447312] page:00000000486d06d6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14645 [ 31.448508] memcg:ffff888016985001 [ 31.448975] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.449678] page_type: 0xffffffff() [ 31.450160] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.451178] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016985001 [ 31.452165] page dumped because: kasan: bad access detected [ 31.452894] [ 31.453125] Memory state around the buggy address: [ 31.453754] ffff888014645680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.454695] ffff888014645700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.455653] >ffff888014645780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.456579] ^ [ 31.457123] ffff888014645800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.458069] ffff888014645880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.458993] ================================================================== [ 31.460075] Disabling lock debugging due to kernel taint [ 33.402257] BUG: Bad rss-counter state mm:000000004346fff4 type:MM_FILEPAGES val:33 [ 33.403458] BUG: Bad rss-counter state mm:000000004346fff4 type:MM_ANONPAGES val:22 [ 33.727349] BUG: Bad rss-counter state mm:000000006f7ed6a6 type:MM_FILEPAGES val:33 [ 33.728618] BUG: Bad rss-counter state mm:000000006f7ed6a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34106' (ECDSA) to the list of known hosts. 2023/06/19 13:41:01 fuzzer started 2023/06/19 13:41:01 dialing manager at localhost:44161 2023/06/19 13:41:01 checking machine... 2023/06/19 13:41:01 checking revisions... [ 34.366380] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:41:01 testing simple program... [ 34.412725] cgroup: Unknown subsys name 'net' [ 34.443385] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:41:00 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000800 RDX=0000000000000001 RSI=0000000000092800 RDI=ffff88800844f780 RBP=0000000000000100 RSP=ffff88800fcf7370 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800eaae800 R13=0000000000000000 R14=0000000000002800 R15=0000000000000000 RIP=ffffffff81807d55 RFL=00000206 [-----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 00007f898c1d9900 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=00007f898c1b8020 CR3=0000000010140000 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=00000000000000000000000000000000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fd89ce0bff0 CR3=000000000c5ee000 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=95b58991c2ca099bda460b43c67792ab XMM02=000000000011ff88eff9b2d0a8fce9cb XMM03=00000000001200582c67c8bc2e329bc3 XMM04=e699fd07a50ccc4000000000000ae988 XMM05=19e9129bd510f2350000000000134280 XMM06=5d913448194f7e5000000000001330e8 XMM07=e042d86d42eb936e0000000000124a18 XMM08=0d0a67ce83ccfb1a0000000000120058 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000