syzkaller login: [ 30.650577] BUG: Bad rss-counter state mm:000000002fed55e7 type:MM_FILEPAGES val:33 [ 30.651784] BUG: Bad rss-counter state mm:000000002fed55e7 type:MM_ANONPAGES val:22 [ 30.815677] ================================================================== [ 30.816588] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.817516] Read of size 8 at addr ffff88800d649880 by task sshd/219 [ 30.818437] [ 30.818657] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.819556] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.820554] Call Trace: [ 30.820885] [ 30.821175] dump_stack_lvl+0x91/0xf0 [ 30.821676] print_report+0xcc/0x620 [ 30.822176] ? __virt_addr_valid+0x102/0x340 [ 30.822739] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.823362] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.823988] kasan_report+0xbe/0xf0 [ 30.824467] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.825108] vma_interval_tree_remove+0xc75/0xec0 [ 30.825715] vma_prepare+0xc54/0x11a0 [ 30.826201] __split_vma+0x5af/0x950 [ 30.826681] ? __pfx___split_vma+0x10/0x10 [ 30.827256] ? find_held_lock+0x2c/0x110 [ 30.827784] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.828388] ? lock_is_held_type+0x9f/0x120 [ 30.828931] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.829544] ? mtree_range_walk+0x632/0x900 [ 30.830093] ? mas_walk+0x5c7/0x7c0 [ 30.830585] do_vmi_munmap+0x1f1/0x2b0 [ 30.831096] mmap_region+0x1f9/0x2660 [ 30.831591] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.832109] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.832832] ? __pfx_lock_acquire+0x10/0x10 [ 30.833375] ? __pfx_mmap_region+0x10/0x10 [ 30.833908] ? security_mmap_addr+0x7d/0xa0 [ 30.834452] ? get_unmapped_area+0x1f5/0x3f0 [ 30.835006] do_mmap+0x854/0xf00 [ 30.835466] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.835970] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.836538] ksys_mmap_pgoff+0x3af/0x500 [ 30.837047] do_syscall_64+0x3f/0x90 [ 30.837527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.838182] RIP: 0033:0x7f3305d0ad82 [ 30.838647] 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 [ 30.840841] RSP: 002b:00007ffd187e86e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.841754] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3305d0ad82 [ 30.842615] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3305144000 [ 30.843482] RBP: 00007f3305144000 R08: 0000000000000009 R09: 0000000000001000 [ 30.844323] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bc8f09cb20 [ 30.845175] R13: 00007ffd187e8700 R14: 00007ffd187e8730 R15: 00007ffd187e8a90 [ 30.846028] [ 30.846321] [ 30.846534] Allocated by task 212: [ 30.846965] kasan_save_stack+0x22/0x50 [ 30.847483] kasan_set_track+0x25/0x30 [ 30.847972] __kasan_slab_alloc+0x59/0x70 [ 30.848493] kmem_cache_alloc+0x16b/0x370 [ 30.849003] vm_area_dup+0x20/0x160 [ 30.849453] __split_vma+0x170/0x950 [ 30.849916] split_vma+0xc6/0x110 [ 30.850349] mprotect_fixup+0x8d2/0xb30 [ 30.850847] do_mprotect_pkey+0x87e/0xd40 [ 30.851375] __x64_sys_mprotect+0x78/0xc0 [ 30.851893] do_syscall_64+0x3f/0x90 [ 30.852367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.853009] [ 30.853220] Freed by task 212: [ 30.853613] kasan_save_stack+0x22/0x50 [ 30.854115] kasan_set_track+0x25/0x30 [ 30.854607] kasan_save_free_info+0x2b/0x50 [ 30.855155] __kasan_slab_free+0x10a/0x190 [ 30.855683] kmem_cache_free+0x10d/0x4d0 [ 30.856187] rcu_core+0x8c8/0x2860 [ 30.856625] __do_softirq+0x1b7/0x7d4 [ 30.857100] [ 30.857314] Last potentially related work creation: [ 30.857893] kasan_save_stack+0x22/0x50 [ 30.858399] __kasan_record_aux_stack+0x8e/0xa0 [ 30.859039] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.859697] remove_vma+0x139/0x170 [ 30.860147] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.860701] do_vmi_munmap+0x1f1/0x2b0 [ 30.861182] __vm_munmap+0x138/0x3a0 [ 30.861650] __x64_sys_munmap+0x59/0x80 [ 30.862143] do_syscall_64+0x3f/0x90 [ 30.862620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.863273] [ 30.863486] The buggy address belongs to the object at ffff88800d649828 [ 30.863486] which belongs to the cache vm_area_struct of size 168 [ 30.864956] The buggy address is located 88 bytes inside of [ 30.864956] freed 168-byte region [ffff88800d649828, ffff88800d6498d0) [ 30.866352] [ 30.866565] The buggy address belongs to the physical page: [ 30.867238] page:00000000c1e95a9b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd649 [ 30.868315] memcg:ffff88800c7a1c01 [ 30.868742] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.869437] page_type: 0xffffffff() [ 30.869888] raw: 0100000000000200 ffff8880087a0c80 ffffea0000260ac0 dead000000000007 [ 30.870802] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c7a1c01 [ 30.871725] page dumped because: kasan: bad access detected [ 30.872388] [ 30.872604] Memory state around the buggy address: [ 30.873180] ffff88800d649780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.874029] ffff88800d649800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.874879] >ffff88800d649880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.875741] ^ [ 30.876148] ffff88800d649900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.876999] ffff88800d649980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.877854] ================================================================== [ 30.878774] Disabling lock debugging due to kernel taint [ 32.858687] BUG: Bad rss-counter state mm:000000008d32a52c type:MM_FILEPAGES val:33 [ 32.859751] BUG: Bad rss-counter state mm:000000008d32a52c type:MM_ANONPAGES val:22 [ 33.378068] BUG: Bad rss-counter state mm:000000002707ad79 type:MM_FILEPAGES val:33 [ 33.379231] BUG: Bad rss-counter state mm:000000002707ad79 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43106' (ECDSA) to the list of known hosts. 2023/06/20 20:53:08 fuzzer started 2023/06/20 20:53:08 dialing manager at localhost:36067 2023/06/20 20:53:08 checking machine... 2023/06/20 20:53:08 checking revisions... [ 33.992912] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:53:08 testing simple program... [ 34.042534] cgroup: Unknown subsys name 'net' [ 34.101628] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:53:07 Registers: info registers vcpu 0 RAX=00000000209b0c17 RBX=0000000051383cb3 RCX=00000000c1e59a89 RDX=0000000000000007 RSI=0000000000000002 RDI=00000000a38abc1a RBP=ffffffff813782f8 RSP=ffff88806ce09b68 R8 =0000000023c0916b R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff88806ce09bd0 R15=0000000000000007 RIP=ffffffff8227053f RFL=00000283 [--S---C] 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 00007f99361a6900 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=00007ffc4718d000 CR3=000000000c68a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=ffff888008c04400 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=00007f2511415ba0 CR3=0000000008dc8000 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=2037303a33353a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a33353a3032203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000