[ 24.568746] BUG: Bad rss-counter state mm:000000003cba668c type:MM_FILEPAGES val:33 [ 24.569436] BUG: Bad rss-counter state mm:000000003cba668c type:MM_ANONPAGES val:22 [ 24.599608] ================================================================== [ 24.600301] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.601030] Read of size 8 at addr ffff88800ee0cc20 by task sshd/219 [ 24.601615] [ 24.601784] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.602441] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.603186] Call Trace: [ 24.603429] [ 24.603651] dump_stack_lvl+0x91/0xf0 [ 24.604030] print_report+0xcc/0x620 [ 24.604528] ? __virt_addr_valid+0x102/0x340 [ 24.604998] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.605469] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.605819] kasan_report+0xbe/0xf0 [ 24.606089] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.606436] vma_interval_tree_remove+0xc75/0xec0 [ 24.606817] vma_prepare+0xc54/0x11a0 [ 24.607103] __split_vma+0x5af/0x950 [ 24.607385] ? __pfx___split_vma+0x10/0x10 [ 24.607704] ? find_held_lock+0x2c/0x110 [ 24.608024] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.608368] ? lock_is_held_type+0x9f/0x120 [ 24.608691] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.609072] ? mtree_range_walk+0x632/0x900 [ 24.609410] ? mas_walk+0x5c7/0x7c0 [ 24.609695] do_vmi_munmap+0x1f1/0x2b0 [ 24.609992] mmap_region+0x1f9/0x2660 [ 24.610286] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.610597] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.611028] ? __pfx_lock_acquire+0x10/0x10 [ 24.611348] ? __pfx_mmap_region+0x10/0x10 [ 24.611671] ? security_mmap_addr+0x7d/0xa0 [ 24.611994] ? get_unmapped_area+0x1f5/0x3f0 [ 24.612331] do_mmap+0x854/0xf00 [ 24.612595] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.612894] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.613239] ksys_mmap_pgoff+0x3af/0x500 [ 24.613547] do_syscall_64+0x3f/0x90 [ 24.613831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.614224] RIP: 0033:0x7f480863fd82 [ 24.614498] 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 [ 24.615821] RSP: 002b:00007ffe94838ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.616377] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f480863fd82 [ 24.616901] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4807a79000 [ 24.617426] RBP: 00007f4807a79000 R08: 0000000000000009 R09: 0000000000001000 [ 24.617935] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b2cef7eec0 [ 24.618457] R13: 00007ffe94838d00 R14: 00007ffe94838d30 R15: 00007ffe94839090 [ 24.618985] [ 24.619160] [ 24.619292] Allocated by task 211: [ 24.619559] kasan_save_stack+0x22/0x50 [ 24.619869] kasan_set_track+0x25/0x30 [ 24.620163] __kasan_slab_alloc+0x59/0x70 [ 24.620473] kmem_cache_alloc+0x16b/0x370 [ 24.620779] vm_area_dup+0x20/0x160 [ 24.621056] __split_vma+0x170/0x950 [ 24.621341] split_vma+0xc6/0x110 [ 24.621605] mprotect_fixup+0x8d2/0xb30 [ 24.621904] do_mprotect_pkey+0x87e/0xd40 [ 24.622211] __x64_sys_mprotect+0x78/0xc0 [ 24.622531] do_syscall_64+0x3f/0x90 [ 24.622814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.623200] [ 24.623331] Freed by task 211: [ 24.623569] kasan_save_stack+0x22/0x50 [ 24.623869] kasan_set_track+0x25/0x30 [ 24.624167] kasan_save_free_info+0x2b/0x50 [ 24.624494] __kasan_slab_free+0x10a/0x190 [ 24.624821] kmem_cache_free+0x10d/0x4d0 [ 24.625132] rcu_core+0x8c8/0x2860 [ 24.625406] __do_softirq+0x1b7/0x7d4 [ 24.625692] [ 24.625815] Last potentially related work creation: [ 24.626169] kasan_save_stack+0x22/0x50 [ 24.626478] __kasan_record_aux_stack+0x8e/0xa0 [ 24.626821] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.627215] remove_vma+0x139/0x170 [ 24.627488] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.627829] do_vmi_munmap+0x1f1/0x2b0 [ 24.628116] __vm_munmap+0x138/0x3a0 [ 24.628397] __x64_sys_munmap+0x59/0x80 [ 24.628695] do_syscall_64+0x3f/0x90 [ 24.628991] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.629366] [ 24.629497] The buggy address belongs to the object at ffff88800ee0cbc8 [ 24.629497] which belongs to the cache vm_area_struct of size 168 [ 24.630407] The buggy address is located 88 bytes inside of [ 24.630407] freed 168-byte region [ffff88800ee0cbc8, ffff88800ee0cc70) [ 24.631273] [ 24.631402] The buggy address belongs to the physical page: [ 24.631796] page:000000008ae2d9f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee0c [ 24.632463] memcg:ffff88800da03301 [ 24.632724] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.633164] page_type: 0xffffffff() [ 24.633430] raw: 0100000000000200 ffff88800879fc80 ffffea00003a58c0 0000000000000009 [ 24.633983] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da03301 [ 24.634535] page dumped because: kasan: bad access detected [ 24.634939] [ 24.635067] Memory state around the buggy address: [ 24.635417] ffff88800ee0cb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.635940] ffff88800ee0cb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.636461] >ffff88800ee0cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.636975] ^ [ 24.637293] ffff88800ee0cc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 24.637815] ffff88800ee0cd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 24.638336] ================================================================== [ 24.638929] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.961515] BUG: Bad rss-counter state mm:000000002979178a type:MM_FILEPAGES val:33 [ 25.962219] BUG: Bad rss-counter state mm:000000002979178a type:MM_ANONPAGES val:22 [ 26.362896] BUG: Bad rss-counter state mm:0000000037edf153 type:MM_FILEPAGES val:33 [ 26.363457] BUG: Bad rss-counter state mm:0000000037edf153 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24363' (ECDSA) to the list of known hosts. 2023/06/19 18:24:54 fuzzer started 2023/06/19 18:24:54 dialing manager at localhost:44161 2023/06/19 18:24:54 checking machine... 2023/06/19 18:24:54 checking revisions... [ 26.980637] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:24:55 testing simple program... [ 27.019187] cgroup: Unknown subsys name 'net' [ 27.073974] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:24:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800ef5d1c0 RSI=ffffffff83ab4207 RDI=ffffffff87f9468c RBP=0000000000000000 RSP=ffff8880166d7500 R8 =0000000000000000 R9 =fffffbfff0ff29c8 R10=ffffffff87f94e43 R11=000008f0000008f0 R12=0000000000000000 R13=0000000000000094 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff8450bdc0 RFL=00000293 [--S-A-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 00007f2f7e791900 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=00007ffc878a9000 CR3=000000000c960000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007fc341f92af0 CR3=0000000008dae000 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=ec3a9fc755dbb6b4044578db1321ac8f XMM02=000000000011d8e8eff9b2d0a8fce9cb XMM03=000000000011d9b82c67c8bc2e329bc3 XMM04=d2eef4189f08af0400000000000ae988 XMM05=dfcdbad4f1609c370000000000133430 XMM06=5b8e22bdacd129260000000000132608 XMM07=e042d86d42eb936e0000000000123ee0 XMM08=ddd2b8a35e766e91000000000011d9b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000