syzkaller login: [ 30.555113] BUG: Bad rss-counter state mm:00000000b236e93c type:MM_FILEPAGES val:33 [ 30.556520] BUG: Bad rss-counter state mm:00000000b236e93c type:MM_ANONPAGES val:22 [ 30.708027] ================================================================== [ 30.708974] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.709939] Read of size 8 at addr ffff888019bb4968 by task sshd/220 [ 30.710745] [ 30.711173] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.712069] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.713086] Call Trace: [ 30.713428] [ 30.713717] dump_stack_lvl+0x91/0xf0 [ 30.714258] print_report+0xcc/0x620 [ 30.714748] ? __virt_addr_valid+0x102/0x340 [ 30.715347] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.715976] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.716628] kasan_report+0xbe/0xf0 [ 30.717110] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.717757] vma_interval_tree_remove+0xc75/0xec0 [ 30.718389] vma_prepare+0xc54/0x11a0 [ 30.718875] __split_vma+0x5af/0x950 [ 30.719362] ? __pfx___split_vma+0x10/0x10 [ 30.719928] ? find_held_lock+0x2c/0x110 [ 30.720444] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.721037] ? lock_is_held_type+0x9f/0x120 [ 30.721582] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.722218] ? mtree_range_walk+0x632/0x900 [ 30.722788] ? mas_walk+0x5c7/0x7c0 [ 30.723328] do_vmi_munmap+0x1f1/0x2b0 [ 30.723824] mmap_region+0x1f9/0x2660 [ 30.724332] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.724841] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.725599] ? __pfx_lock_acquire+0x10/0x10 [ 30.726131] ? __pfx_mmap_region+0x10/0x10 [ 30.726689] ? security_mmap_addr+0x7d/0xa0 [ 30.727236] ? get_unmapped_area+0x1f5/0x3f0 [ 30.727809] do_mmap+0x854/0xf00 [ 30.728255] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.728790] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.729356] ksys_mmap_pgoff+0x3af/0x500 [ 30.729897] do_syscall_64+0x3f/0x90 [ 30.730384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.731088] RIP: 0033:0x7f286f6c5d82 [ 30.731553] 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 [ 30.733741] RSP: 002b:00007ffe197badb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.734672] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f286f6c5d82 [ 30.735568] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f286eaff000 [ 30.736447] RBP: 00007f286eaff000 R08: 0000000000000009 R09: 0000000000001000 [ 30.737294] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a16e957d90 [ 30.738168] R13: 00007ffe197badd0 R14: 00007ffe197bae00 R15: 00007ffe197bb160 [ 30.739073] [ 30.739371] [ 30.739598] Allocated by task 213: [ 30.740050] kasan_save_stack+0x22/0x50 [ 30.740551] kasan_set_track+0x25/0x30 [ 30.741082] __kasan_slab_alloc+0x59/0x70 [ 30.741618] kmem_cache_alloc+0x16b/0x370 [ 30.742170] vm_area_dup+0x20/0x160 [ 30.742627] __split_vma+0x170/0x950 [ 30.743144] split_vma+0xc6/0x110 [ 30.743588] mprotect_fixup+0x8d2/0xb30 [ 30.744108] do_mprotect_pkey+0x87e/0xd40 [ 30.744651] __x64_sys_mprotect+0x78/0xc0 [ 30.745174] do_syscall_64+0x3f/0x90 [ 30.745681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.746341] [ 30.746574] Freed by task 213: [ 30.746993] kasan_save_stack+0x22/0x50 [ 30.747545] kasan_set_track+0x25/0x30 [ 30.748041] kasan_save_free_info+0x2b/0x50 [ 30.748589] __kasan_slab_free+0x10a/0x190 [ 30.749133] kmem_cache_free+0x10d/0x4d0 [ 30.749643] rcu_core+0x8c8/0x2860 [ 30.750104] __do_softirq+0x1b7/0x7d4 [ 30.750586] [ 30.750825] Last potentially related work creation: [ 30.751429] kasan_save_stack+0x22/0x50 [ 30.751968] __kasan_record_aux_stack+0x8e/0xa0 [ 30.752594] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.753267] remove_vma+0x139/0x170 [ 30.753716] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.754310] do_vmi_munmap+0x1f1/0x2b0 [ 30.754797] __vm_munmap+0x138/0x3a0 [ 30.755308] __x64_sys_munmap+0x59/0x80 [ 30.755819] do_syscall_64+0x3f/0x90 [ 30.756302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.756967] [ 30.757184] The buggy address belongs to the object at ffff888019bb4910 [ 30.757184] which belongs to the cache vm_area_struct of size 168 [ 30.758702] The buggy address is located 88 bytes inside of [ 30.758702] freed 168-byte region [ffff888019bb4910, ffff888019bb49b8) [ 30.760156] [ 30.760379] The buggy address belongs to the physical page: [ 30.761066] page:00000000717ee397 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19bb4 [ 30.762186] memcg:ffff88800fdc0b01 [ 30.762616] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.763310] page_type: 0xffffffff() [ 30.763767] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.764731] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fdc0b01 [ 30.765667] page dumped because: kasan: bad access detected [ 30.766328] [ 30.766574] Memory state around the buggy address: [ 30.767182] ffff888019bb4800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.768080] ffff888019bb4880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.768964] >ffff888019bb4900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.769837] ^ [ 30.770625] ffff888019bb4980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.771542] ffff888019bb4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.772430] ================================================================== [ 30.773377] Disabling lock debugging due to kernel taint [ 32.851287] BUG: Bad rss-counter state mm:00000000b462d2af type:MM_FILEPAGES val:33 [ 32.852340] BUG: Bad rss-counter state mm:00000000b462d2af type:MM_ANONPAGES val:22 [ 33.227112] BUG: Bad rss-counter state mm:000000007633526e type:MM_FILEPAGES val:33 [ 33.228274] BUG: Bad rss-counter state mm:000000007633526e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62755' (ECDSA) to the list of known hosts. 2023/06/20 11:46:18 fuzzer started 2023/06/20 11:46:18 dialing manager at localhost:36067 2023/06/20 11:46:18 checking machine... 2023/06/20 11:46:18 checking revisions... [ 33.943059] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:46:18 testing simple program... [ 33.989878] cgroup: Unknown subsys name 'net' [ 34.030887] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:46:18 Registers: info registers vcpu 0 RAX=ffffffff81390b6d RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11001886f5e RSI=ffff88800c437ee0 RDI=ffffffff81390b6d RBP=ffff88800c437b30 RSP=ffff88800c437a98 R8 =0000000000000001 R9 =ffff88800c437ad8 R10=0000000000038001 R11=0000000000009789 R12=ffff88800c437b60 R13=0000000000000000 R14=ffff888014679b40 R15=ffff88800cd3f680 RIP=ffffffff810bd06d 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 00007f37068f3900 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=00007f5850c47650 CR3=000000000d69a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f23cd8c590e592e000000000000ae988 XMM05=45884a455a483f5f0000000000132830 XMM06=19e9129bd510f23500000000001316c8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007ffd08f954e8 CR3=000000000f06a000 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=2038313a36343a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a36343a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000