syzkaller login: [ 37.796652] BUG: Bad rss-counter state mm:00000000139be47e type:MM_FILEPAGES val:33 [ 37.797837] BUG: Bad rss-counter state mm:00000000139be47e type:MM_ANONPAGES val:22 [ 37.835509] ================================================================== [ 37.836464] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.837255] Read of size 8 at addr ffff888016a18228 by task sshd/219 [ 37.837917] [ 37.838102] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.838861] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.839885] Call Trace: [ 37.840172] [ 37.840413] dump_stack_lvl+0x91/0xf0 [ 37.840831] print_report+0xcc/0x620 [ 37.841240] ? __virt_addr_valid+0x102/0x340 [ 37.841728] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.842250] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.842780] kasan_report+0xbe/0xf0 [ 37.843189] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.843727] vma_interval_tree_remove+0xc75/0xec0 [ 37.844261] vma_prepare+0xc54/0x11a0 [ 37.844680] __split_vma+0x5af/0x950 [ 37.845094] ? __pfx___split_vma+0x10/0x10 [ 37.845553] ? find_held_lock+0x2c/0x110 [ 37.846001] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.846502] ? lock_is_held_type+0x9f/0x120 [ 37.846979] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.847516] ? mtree_range_walk+0x632/0x900 [ 37.847993] ? mas_walk+0x5c7/0x7c0 [ 37.848432] do_vmi_munmap+0x1f1/0x2b0 [ 37.848857] mmap_region+0x1f9/0x2660 [ 37.849287] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.849737] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.850354] ? __pfx_lock_acquire+0x10/0x10 [ 37.850833] ? __pfx_mmap_region+0x10/0x10 [ 37.851290] ? security_mmap_addr+0x7d/0xa0 [ 37.851757] ? get_unmapped_area+0x1f5/0x3f0 [ 37.852249] do_mmap+0x854/0xf00 [ 37.852644] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.853077] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.853569] ksys_mmap_pgoff+0x3af/0x500 [ 37.854004] do_syscall_64+0x3f/0x90 [ 37.854420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.854973] RIP: 0033:0x7f3f37d60d82 [ 37.855374] 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 [ 37.857196] RSP: 002b:00007ffd402de5d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.857965] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f37d60d82 [ 37.858684] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f3719a000 [ 37.859412] RBP: 00007f3f3719a000 R08: 0000000000000009 R09: 0000000000001000 [ 37.860162] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558948a58980 [ 37.860901] R13: 00007ffd402de5f0 R14: 00007ffd402de620 R15: 00007ffd402de980 [ 37.861637] [ 37.861888] [ 37.862075] Allocated by task 212: [ 37.862446] kasan_save_stack+0x22/0x50 [ 37.862881] kasan_set_track+0x25/0x30 [ 37.863300] __kasan_slab_alloc+0x59/0x70 [ 37.863742] kmem_cache_alloc+0x16b/0x370 [ 37.864196] vm_area_dup+0x20/0x160 [ 37.864602] __split_vma+0x170/0x950 [ 37.864998] split_vma+0xc6/0x110 [ 37.865384] mprotect_fixup+0x8d2/0xb30 [ 37.865839] do_mprotect_pkey+0x87e/0xd40 [ 37.866282] __x64_sys_mprotect+0x78/0xc0 [ 37.866718] do_syscall_64+0x3f/0x90 [ 37.867116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.867680] [ 37.867856] Freed by task 13: [ 37.868200] kasan_save_stack+0x22/0x50 [ 37.868629] kasan_set_track+0x25/0x30 [ 37.869038] kasan_save_free_info+0x2b/0x50 [ 37.869484] __kasan_slab_free+0x10a/0x190 [ 37.869929] kmem_cache_free+0x10d/0x4d0 [ 37.870347] rcu_core+0x8c8/0x2860 [ 37.870720] __do_softirq+0x1b7/0x7d4 [ 37.871126] [ 37.871313] Last potentially related work creation: [ 37.871806] kasan_save_stack+0x22/0x50 [ 37.872242] __kasan_record_aux_stack+0x8e/0xa0 [ 37.872724] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.873258] remove_vma+0x139/0x170 [ 37.873647] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.874109] do_vmi_munmap+0x1f1/0x2b0 [ 37.874512] __vm_munmap+0x138/0x3a0 [ 37.874905] __x64_sys_munmap+0x59/0x80 [ 37.875317] do_syscall_64+0x3f/0x90 [ 37.875711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.876295] [ 37.876495] The buggy address belongs to the object at ffff888016a181d0 [ 37.876495] which belongs to the cache vm_area_struct of size 168 [ 37.877808] The buggy address is located 88 bytes inside of [ 37.877808] freed 168-byte region [ffff888016a181d0, ffff888016a18278) [ 37.879036] [ 37.879231] The buggy address belongs to the physical page: [ 37.879820] page:00000000279a0941 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a18 [ 37.880920] memcg:ffff888016a0e501 [ 37.881291] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.881871] page_type: 0xffffffff() [ 37.882267] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.883073] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a0e501 [ 37.883875] page dumped because: kasan: bad access detected [ 37.884473] [ 37.884660] Memory state around the buggy address: [ 37.885173] ffff888016a18100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.885902] ffff888016a18180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 37.886685] >ffff888016a18200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 37.887432] ^ [ 37.887933] ffff888016a18280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 37.888692] ffff888016a18300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 37.889436] ================================================================== [ 37.890352] Disabling lock debugging due to kernel taint [ 39.759327] BUG: Bad rss-counter state mm:000000006c9e3d7a type:MM_FILEPAGES val:33 [ 39.760229] BUG: Bad rss-counter state mm:000000006c9e3d7a type:MM_ANONPAGES val:22 [ 40.320739] BUG: Bad rss-counter state mm:00000000bdf0ace4 type:MM_FILEPAGES val:33 [ 40.321913] BUG: Bad rss-counter state mm:00000000bdf0ace4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31821' (ECDSA) to the list of known hosts. 2023/06/19 11:59:35 fuzzer started 2023/06/19 11:59:35 dialing manager at localhost:44161 2023/06/19 11:59:35 checking machine... 2023/06/19 11:59:35 checking revisions... [ 41.017059] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:59:35 testing simple program... [ 41.069982] cgroup: Unknown subsys name 'net' [ 41.127151] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:59:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8180ee7d RDX=00000000000080ee RSI=00000000000080ee RDI=ffffffff86507f78 RBP=ffff888018db75d8 RSP=ffff888018db7510 R8 =0000000000000000 R9 =ffff888018db75c0 R10=0000000000038001 R11=0000000000020d8a R12=ffff888018db75e0 R13=ffff888018db75c8 R14=ffff888018db75c1 R15=ffff888018db7580 RIP=ffffffff8113077a RFL=00000212 [----A--] 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 00007f3553fd4900 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=00007f355458b618 CR3=000000000fabe000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 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=00007f07a74a3a50 CR3=000000000c6ba000 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=64709e77404803874e4a601eec2d9350 XMM02=ec2efd57dc4c00df000000000011c3e0 XMM03=a5753f6076c4a682000000000011c4b0 XMM04=87f4e05ca24907b300000000000ae988 XMM05=dfcdbad4f1609c370000000000133558 XMM06=659179080be1cbfa00000000001323c0 XMM07=e042d86d42eb936e0000000000123c48 XMM08=a5753f6076c4a682000000000011c4b0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000