syzkaller login: [ 31.495614] BUG: Bad rss-counter state mm:0000000071f4b2d1 type:MM_FILEPAGES val:33 [ 31.496789] BUG: Bad rss-counter state mm:0000000071f4b2d1 type:MM_ANONPAGES val:22 [ 31.530770] ================================================================== [ 31.531649] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.532631] Read of size 8 at addr ffff88801aab86b0 by task sshd/219 [ 31.533566] [ 31.533786] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.534648] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.535645] Call Trace: [ 31.535965] [ 31.536249] dump_stack_lvl+0x91/0xf0 [ 31.536741] print_report+0xcc/0x620 [ 31.537227] ? __virt_addr_valid+0x102/0x340 [ 31.537817] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.538445] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.539145] kasan_report+0xbe/0xf0 [ 31.539618] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.540214] vma_interval_tree_remove+0xc75/0xec0 [ 31.540789] vma_prepare+0xc54/0x11a0 [ 31.541239] __split_vma+0x5af/0x950 [ 31.541691] ? __pfx___split_vma+0x10/0x10 [ 31.542190] ? find_held_lock+0x2c/0x110 [ 31.542681] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.543219] ? lock_is_held_type+0x9f/0x120 [ 31.543733] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.544311] ? mtree_range_walk+0x632/0x900 [ 31.544844] ? mas_walk+0x5c7/0x7c0 [ 31.545412] do_vmi_munmap+0x1f1/0x2b0 [ 31.546021] mmap_region+0x1f9/0x2660 [ 31.546614] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.547219] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.547966] ? __pfx_lock_acquire+0x10/0x10 [ 31.548528] ? __pfx_mmap_region+0x10/0x10 [ 31.549094] ? security_mmap_addr+0x7d/0xa0 [ 31.549682] ? get_unmapped_area+0x1f5/0x3f0 [ 31.550239] do_mmap+0x854/0xf00 [ 31.550679] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.551174] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.551738] ksys_mmap_pgoff+0x3af/0x500 [ 31.552241] do_syscall_64+0x3f/0x90 [ 31.552719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.553368] RIP: 0033:0x7fa493c58d82 [ 31.553877] 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 [ 31.556074] RSP: 002b:00007ffe89d90f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.556974] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa493c58d82 [ 31.557845] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa493092000 [ 31.558693] RBP: 00007fa493092000 R08: 0000000000000009 R09: 0000000000001000 [ 31.559536] R10: 0000000000000812 R11: 0000000000000206 R12: 00005653c7752ec0 [ 31.560380] R13: 00007ffe89d90fa0 R14: 00007ffe89d90fd0 R15: 00007ffe89d91330 [ 31.561237] [ 31.561556] [ 31.561797] Allocated by task 212: [ 31.562225] kasan_save_stack+0x22/0x50 [ 31.562821] kasan_set_track+0x25/0x30 [ 31.563312] __kasan_slab_alloc+0x59/0x70 [ 31.563838] kmem_cache_alloc+0x16b/0x370 [ 31.564353] vm_area_dup+0x20/0x160 [ 31.564800] __split_vma+0x170/0x950 [ 31.565273] split_vma+0xc6/0x110 [ 31.565736] mprotect_fixup+0x8d2/0xb30 [ 31.566236] do_mprotect_pkey+0x87e/0xd40 [ 31.566752] __x64_sys_mprotect+0x78/0xc0 [ 31.567278] do_syscall_64+0x3f/0x90 [ 31.567763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.568409] [ 31.568622] Freed by task 212: [ 31.569013] kasan_save_stack+0x22/0x50 [ 31.569531] kasan_set_track+0x25/0x30 [ 31.570030] kasan_save_free_info+0x2b/0x50 [ 31.570628] __kasan_slab_free+0x10a/0x190 [ 31.571283] kmem_cache_free+0x10d/0x4d0 [ 31.571873] rcu_core+0x8c8/0x2860 [ 31.572323] __do_softirq+0x1b7/0x7d4 [ 31.572798] [ 31.573017] Last potentially related work creation: [ 31.573617] kasan_save_stack+0x22/0x50 [ 31.574117] __kasan_record_aux_stack+0x8e/0xa0 [ 31.574689] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.575326] remove_vma+0x139/0x170 [ 31.575779] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.576345] do_vmi_munmap+0x1f1/0x2b0 [ 31.576852] __vm_munmap+0x138/0x3a0 [ 31.577328] __x64_sys_munmap+0x59/0x80 [ 31.577838] do_syscall_64+0x3f/0x90 [ 31.578322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.578958] [ 31.579172] The buggy address belongs to the object at ffff88801aab8658 [ 31.579172] which belongs to the cache vm_area_struct of size 168 [ 31.580628] The buggy address is located 88 bytes inside of [ 31.580628] freed 168-byte region [ffff88801aab8658, ffff88801aab8700) [ 31.582024] [ 31.582231] The buggy address belongs to the physical page: [ 31.582860] page:00000000989c6bb8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1aab8 [ 31.583884] memcg:ffff888018fe7901 [ 31.584287] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.584902] page_type: 0xffffffff() [ 31.585326] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.586263] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018fe7901 [ 31.587164] page dumped because: kasan: bad access detected [ 31.587818] [ 31.588029] Memory state around the buggy address: [ 31.588596] ffff88801aab8580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.589439] ffff88801aab8600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.590288] >ffff88801aab8680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.591131] ^ [ 31.591707] ffff88801aab8700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.592556] ffff88801aab8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.593401] ================================================================== [ 31.594541] Disabling lock debugging due to kernel taint [ 33.405991] BUG: Bad rss-counter state mm:000000007d852ca1 type:MM_FILEPAGES val:33 [ 33.406773] BUG: Bad rss-counter state mm:000000007d852ca1 type:MM_ANONPAGES val:22 [ 33.852787] BUG: Bad rss-counter state mm:00000000398aa022 type:MM_FILEPAGES val:33 [ 33.854432] BUG: Bad rss-counter state mm:00000000398aa022 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41689' (ECDSA) to the list of known hosts. 2023/06/20 20:55:37 fuzzer started 2023/06/20 20:55:37 dialing manager at localhost:36067 2023/06/20 20:55:37 checking machine... 2023/06/20 20:55:37 checking revisions... [ 34.582383] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:55:37 testing simple program... [ 34.634086] cgroup: Unknown subsys name 'net' [ 34.672013] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:55:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff86138e8c RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86138e90 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09de8 R15=ffff88806ce09a98 RIP=ffffffff81131171 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 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=00007fcd9febc300 CR3=000000000d65a000 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=2036333a35353a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a35353a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff1100192efac RCX=0000000000000008 RDX=ffff88801658d1c0 RSI=ffffffff81717e08 RDI=ffff88800c977dc0 RBP=ffff88800e9ce488 RSP=ffff88800c977d40 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00007f99e78df008 R13=dffffc0000000000 R14=0000000000000255 R15=0000000000000040 RIP=ffffffff81717e19 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f99e791f900 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=00007f99e78df008 CR3=0000000018e16000 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=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