syzkaller login: [ 38.664873] BUG: Bad rss-counter state mm:000000002dc958dc type:MM_FILEPAGES val:33 [ 38.666036] BUG: Bad rss-counter state mm:000000002dc958dc type:MM_ANONPAGES val:22 [ 38.829065] ================================================================== [ 38.830243] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.831642] Read of size 8 at addr ffff88800f0674e0 by task sshd/218 [ 38.832546] [ 38.832797] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.833818] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.834943] Call Trace: [ 38.835307] [ 38.835643] dump_stack_lvl+0x91/0xf0 [ 38.836197] print_report+0xcc/0x620 [ 38.836750] ? __virt_addr_valid+0x102/0x340 [ 38.837380] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.838102] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.838811] kasan_report+0xbe/0xf0 [ 38.839569] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.840331] vma_interval_tree_remove+0xc75/0xec0 [ 38.841050] vma_prepare+0xc54/0x11a0 [ 38.841628] __split_vma+0x5af/0x950 [ 38.842191] ? __pfx___split_vma+0x10/0x10 [ 38.842825] ? find_held_lock+0x2c/0x110 [ 38.843469] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.844156] ? lock_is_held_type+0x9f/0x120 [ 38.844798] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.845518] ? mtree_range_walk+0x632/0x900 [ 38.846180] ? mas_walk+0x5c7/0x7c0 [ 38.846746] do_vmi_munmap+0x1f1/0x2b0 [ 38.847340] mmap_region+0x1f9/0x2660 [ 38.847919] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.848527] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.849365] ? __pfx_lock_acquire+0x10/0x10 [ 38.849994] ? __pfx_mmap_region+0x10/0x10 [ 38.850618] ? security_mmap_addr+0x7d/0xa0 [ 38.851273] ? get_unmapped_area+0x1f5/0x3f0 [ 38.851924] do_mmap+0x854/0xf00 [ 38.852362] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.852858] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.853420] ksys_mmap_pgoff+0x3af/0x500 [ 38.853940] do_syscall_64+0x3f/0x90 [ 38.854432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.855095] RIP: 0033:0x7f308ac4fd82 [ 38.855561] 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 [ 38.857724] RSP: 002b:00007ffc4dd8e618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.858627] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f308ac4fd82 [ 38.859525] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f308a089000 [ 38.860379] RBP: 00007f308a089000 R08: 0000000000000009 R09: 0000000000001000 [ 38.861236] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561f0a4a0ec0 [ 38.862082] R13: 00007ffc4dd8e630 R14: 00007ffc4dd8e660 R15: 00007ffc4dd8e9c0 [ 38.862940] [ 38.863229] [ 38.863447] Allocated by task 211: [ 38.863877] kasan_save_stack+0x22/0x50 [ 38.864384] kasan_set_track+0x25/0x30 [ 38.864887] __kasan_slab_alloc+0x59/0x70 [ 38.865412] kmem_cache_alloc+0x16b/0x370 [ 38.865937] vm_area_dup+0x20/0x160 [ 38.866398] __split_vma+0x170/0x950 [ 38.866873] split_vma+0xc6/0x110 [ 38.867318] mprotect_fixup+0x8d2/0xb30 [ 38.867822] do_mprotect_pkey+0x87e/0xd40 [ 38.868347] __x64_sys_mprotect+0x78/0xc0 [ 38.868872] do_syscall_64+0x3f/0x90 [ 38.869381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.870035] [ 38.870253] Freed by task 202: [ 38.870647] kasan_save_stack+0x22/0x50 [ 38.871173] kasan_set_track+0x25/0x30 [ 38.871665] kasan_save_free_info+0x2b/0x50 [ 38.872198] __kasan_slab_free+0x10a/0x190 [ 38.872727] kmem_cache_free+0x10d/0x4d0 [ 38.873242] rcu_core+0x8c8/0x2860 [ 38.873687] __do_softirq+0x1b7/0x7d4 [ 38.874173] [ 38.874390] Last potentially related work creation: [ 38.874999] kasan_save_stack+0x22/0x50 [ 38.875500] __kasan_record_aux_stack+0x8e/0xa0 [ 38.876075] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.876728] remove_vma+0x139/0x170 [ 38.877185] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.877742] do_vmi_munmap+0x1f1/0x2b0 [ 38.878230] __vm_munmap+0x138/0x3a0 [ 38.878694] __x64_sys_munmap+0x59/0x80 [ 38.879205] do_syscall_64+0x3f/0x90 [ 38.879675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.880326] [ 38.880544] Second to last potentially related work creation: [ 38.881238] kasan_save_stack+0x22/0x50 [ 38.881744] __kasan_record_aux_stack+0x8e/0xa0 [ 38.882320] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.882985] remove_vma+0x139/0x170 [ 38.883452] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.884007] do_vmi_munmap+0x1f1/0x2b0 [ 38.884491] mmap_region+0x1f9/0x2660 [ 38.884967] do_mmap+0x854/0xf00 [ 38.885396] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.885880] ksys_mmap_pgoff+0x7d/0x500 [ 38.886374] do_syscall_64+0x3f/0x90 [ 38.886855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.887496] [ 38.887709] The buggy address belongs to the object at ffff88800f067488 [ 38.887709] which belongs to the cache vm_area_struct of size 168 [ 38.889179] The buggy address is located 88 bytes inside of [ 38.889179] freed 168-byte region [ffff88800f067488, ffff88800f067530) [ 38.890591] [ 38.890809] The buggy address belongs to the physical page: [ 38.891500] page:000000000676a633 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf067 [ 38.892596] memcg:ffff88800ef61e01 [ 38.893032] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.893738] page_type: 0xffffffff() [ 38.894202] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bce00 dead000000000005 [ 38.895137] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef61e01 [ 38.896045] page dumped because: kasan: bad access detected [ 38.896703] [ 38.896920] Memory state around the buggy address: [ 38.897500] ffff88800f067380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.898361] ffff88800f067400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.899223] >ffff88800f067480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.900080] ^ [ 38.900841] ffff88800f067500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.901706] ffff88800f067580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.902557] ================================================================== [ 38.903628] Disabling lock debugging due to kernel taint [ 40.735859] BUG: Bad rss-counter state mm:0000000074a88506 type:MM_FILEPAGES val:33 [ 40.737182] BUG: Bad rss-counter state mm:0000000074a88506 type:MM_ANONPAGES val:22 [ 41.078584] BUG: Bad rss-counter state mm:00000000e63980f1 type:MM_FILEPAGES val:33 [ 41.079424] BUG: Bad rss-counter state mm:00000000e63980f1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40746' (ECDSA) to the list of known hosts. 2023/06/21 02:48:37 fuzzer started 2023/06/21 02:48:37 dialing manager at localhost:36067 2023/06/21 02:48:37 checking machine... 2023/06/21 02:48:37 checking revisions... [ 41.724173] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:48:37 testing simple program... [ 41.788988] cgroup: Unknown subsys name 'net' [ 41.855684] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:48:37 Registers: info registers vcpu 0 RAX=00000000000000a8 RBX=ffff888013e032c8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888013e03300 RBP=ffff88800e5802b8 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800e584cf0 R14=ffffffff813782f8 R15=ffff88800e584cf0 RIP=ffffffff8184650b 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 00007ff08b19c900 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=00007ff08b16b008 CR3=000000000e390000 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=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=00007f9a5e20d090 CR3=0000000019308000 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=2037333a38343a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a38343a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000