[ 23.670051] BUG: Bad rss-counter state mm:00000000b36fb6d2 type:MM_FILEPAGES val:33 [ 23.671492] BUG: Bad rss-counter state mm:00000000b36fb6d2 type:MM_ANONPAGES val:22 [ 23.829458] ================================================================== [ 23.830379] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.831320] Read of size 8 at addr ffff88800f0bbc20 by task sshd/221 [ 23.832258] [ 23.832477] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.833349] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.834359] Call Trace: [ 23.834678] [ 23.834972] dump_stack_lvl+0x91/0xf0 [ 23.835488] print_report+0xcc/0x620 [ 23.835983] ? __virt_addr_valid+0x102/0x340 [ 23.836538] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.837167] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.837792] kasan_report+0xbe/0xf0 [ 23.838273] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.838898] vma_interval_tree_remove+0xc75/0xec0 [ 23.839513] vma_prepare+0xc54/0x11a0 [ 23.839998] __split_vma+0x5af/0x950 [ 23.840472] ? __pfx___split_vma+0x10/0x10 [ 23.841005] ? find_held_lock+0x2c/0x110 [ 23.841519] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.842084] ? lock_is_held_type+0x9f/0x120 [ 23.842632] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.843237] ? mtree_range_walk+0x632/0x900 [ 23.843801] ? mas_walk+0x5c7/0x7c0 [ 23.844278] do_vmi_munmap+0x1f1/0x2b0 [ 23.844770] mmap_region+0x1f9/0x2660 [ 23.845252] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.845762] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.846475] ? __pfx_lock_acquire+0x10/0x10 [ 23.847012] ? __pfx_mmap_region+0x10/0x10 [ 23.847553] ? security_mmap_addr+0x7d/0xa0 [ 23.848089] ? get_unmapped_area+0x1f5/0x3f0 [ 23.848641] do_mmap+0x854/0xf00 [ 23.849085] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.849580] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.850149] ksys_mmap_pgoff+0x3af/0x500 [ 23.850656] do_syscall_64+0x3f/0x90 [ 23.851132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.851789] RIP: 0033:0x7f6aca8ccd82 [ 23.852250] 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 [ 23.854377] RSP: 002b:00007ffd5dbc24c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.855293] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6aca8ccd82 [ 23.856165] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6ac9d06000 [ 23.857010] RBP: 00007f6ac9d06000 R08: 0000000000000009 R09: 0000000000001000 [ 23.857854] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557fa07c1b20 [ 23.858697] R13: 00007ffd5dbc24e0 R14: 00007ffd5dbc2510 R15: 00007ffd5dbc2870 [ 23.859563] [ 23.859857] [ 23.860076] Allocated by task 214: [ 23.860505] kasan_save_stack+0x22/0x50 [ 23.861017] kasan_set_track+0x25/0x30 [ 23.861511] __kasan_slab_alloc+0x59/0x70 [ 23.862038] kmem_cache_alloc+0x16b/0x370 [ 23.862554] vm_area_dup+0x20/0x160 [ 23.863011] __split_vma+0x170/0x950 [ 23.863493] split_vma+0xc6/0x110 [ 23.864105] mprotect_fixup+0x8d2/0xb30 [ 23.864774] do_mprotect_pkey+0x87e/0xd40 [ 23.865479] __x64_sys_mprotect+0x78/0xc0 [ 23.866178] do_syscall_64+0x3f/0x90 [ 23.866827] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.867729] [ 23.868016] Freed by task 214: [ 23.868550] kasan_save_stack+0x22/0x50 [ 23.869233] kasan_set_track+0x25/0x30 [ 23.869894] kasan_save_free_info+0x2b/0x50 [ 23.870608] __kasan_slab_free+0x10a/0x190 [ 23.871327] kmem_cache_free+0x10d/0x4d0 [ 23.872027] rcu_core+0x8c8/0x2860 [ 23.872629] __do_softirq+0x1b7/0x7d4 [ 23.873269] [ 23.873610] Last potentially related work creation: [ 23.874391] kasan_save_stack+0x22/0x50 [ 23.875061] __kasan_record_aux_stack+0x8e/0xa0 [ 23.875852] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.876721] remove_vma+0x139/0x170 [ 23.877331] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.878076] do_vmi_munmap+0x1f1/0x2b0 [ 23.878727] __vm_munmap+0x138/0x3a0 [ 23.879372] __x64_sys_munmap+0x59/0x80 [ 23.880052] do_syscall_64+0x3f/0x90 [ 23.880689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.881558] [ 23.881846] Second to last potentially related work creation: [ 23.882774] kasan_save_stack+0x22/0x50 [ 23.883478] __kasan_record_aux_stack+0x8e/0xa0 [ 23.884247] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.885114] remove_vma+0x139/0x170 [ 23.885723] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.886471] do_vmi_munmap+0x1f1/0x2b0 [ 23.887128] mmap_region+0x1f9/0x2660 [ 23.887782] do_mmap+0x854/0xf00 [ 23.888369] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.889035] ksys_mmap_pgoff+0x3af/0x500 [ 23.889715] do_syscall_64+0x3f/0x90 [ 23.890356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.891213] [ 23.891596] The buggy address belongs to the object at ffff88800f0bbbc8 [ 23.891596] which belongs to the cache vm_area_struct of size 168 [ 23.893362] The buggy address is located 88 bytes inside of [ 23.893362] freed 168-byte region [ffff88800f0bbbc8, ffff88800f0bbc70) [ 23.895046] [ 23.895304] The buggy address belongs to the physical page: [ 23.896128] page:000000008282389c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0bb [ 23.897431] memcg:ffff888009427201 [ 23.897937] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.898702] page_type: 0xffffffff() [ 23.899242] raw: 0100000000000200 ffff8880087a0c80 ffffea000031d580 dead000000000004 [ 23.900352] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009427201 [ 23.901436] page dumped because: kasan: bad access detected [ 23.902225] [ 23.902482] Memory state around the buggy address: [ 23.903180] ffff88800f0bbb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.904208] ffff88800f0bbb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 23.905233] >ffff88800f0bbc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 23.906246] ^ [ 23.906876] ffff88800f0bbc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 23.907939] ffff88800f0bbd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 23.908906] ================================================================== [ 23.909885] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.965661] BUG: Bad rss-counter state mm:00000000d464f9aa type:MM_FILEPAGES val:33 [ 25.966505] BUG: Bad rss-counter state mm:00000000d464f9aa type:MM_ANONPAGES val:22 [ 26.458334] BUG: Bad rss-counter state mm:00000000cd641469 type:MM_FILEPAGES val:33 [ 26.459367] BUG: Bad rss-counter state mm:00000000cd641469 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21751' (ECDSA) to the list of known hosts. 2023/06/21 04:21:17 fuzzer started 2023/06/21 04:21:18 dialing manager at localhost:36067 2023/06/21 04:21:18 checking machine... 2023/06/21 04:21:18 checking revisions... [ 27.205401] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:21:18 testing simple program... [ 27.257994] cgroup: Unknown subsys name 'net' [ 27.308269] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:21:17 Registers: info registers vcpu 0 RAX=ffffffff81106270 RBX=0000000000000000 RCX=0000000000000019 RDX=1ffff1100d9c5029 RSI=ffff88806ce28140 RDI=0000000000053594 RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ee965 R11=00000012611f9ae0 R12=0000000000053594 R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff81106277 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 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=00007fff8a442738 CR3=000000000db40000 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=2037313a31323a3430203132206e754a XMM01=657463656e6e6f63736944203a5d3233 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3233325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a31323a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f07f204e400 RCX=ffffffff813a0b19 RDX=ffff88800ea81b40 RSI=00000000f204e400 RDI=0000000000000000 RBP=ffffffffffffffff RSP=ffff88806cf09a20 R8 =0000000000000006 R9 =00007f07f204e477 R10=ffffffffffffffff R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800ea81b40 R15=ffff88800e1e41b0 RIP=ffffffff814c03a8 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 00007f07f1b5b900 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=00007f07f2110650 CR3=000000000d722000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000