[ 57.657319] BUG: Bad rss-counter state mm:00000000e95014c8 type:MM_FILEPAGES val:33 [ 57.658472] BUG: Bad rss-counter state mm:00000000e95014c8 type:MM_ANONPAGES val:22 [ 57.802159] ================================================================== [ 57.803202] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 57.804258] Read of size 8 at addr ffff88801b8c7798 by task sshd/220 [ 57.805261] [ 57.805478] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 57.806446] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 57.807362] Call Trace: [ 57.807663] [ 57.807934] dump_stack_lvl+0x91/0xf0 [ 57.808394] print_report+0xcc/0x620 [ 57.808852] ? __virt_addr_valid+0x102/0x340 [ 57.809390] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.809971] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.810554] kasan_report+0xbe/0xf0 [ 57.811000] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.811582] vma_interval_tree_remove+0xc75/0xec0 [ 57.812155] vma_prepare+0xc54/0x11a0 [ 57.812611] __split_vma+0x5af/0x950 [ 57.813057] ? __pfx___split_vma+0x10/0x10 [ 57.813699] ? find_held_lock+0x2c/0x110 [ 57.814310] do_vmi_align_munmap+0x2ba/0x11f0 [ 57.814974] ? lock_is_held_type+0x9f/0x120 [ 57.815605] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 57.816317] ? mtree_range_walk+0x632/0x900 [ 57.816958] ? mas_walk+0x5c7/0x7c0 [ 57.817525] do_vmi_munmap+0x1f1/0x2b0 [ 57.818099] mmap_region+0x1f9/0x2660 [ 57.818671] ? vm_mmap_pgoff+0x15c/0x3a0 [ 57.819273] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 57.820105] ? __pfx_lock_acquire+0x10/0x10 [ 57.820729] ? __pfx_mmap_region+0x10/0x10 [ 57.821375] ? security_mmap_addr+0x7d/0xa0 [ 57.821996] ? get_unmapped_area+0x1f5/0x3f0 [ 57.822639] do_mmap+0x854/0xf00 [ 57.823152] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.823728] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 57.824383] ksys_mmap_pgoff+0x3af/0x500 [ 57.824977] do_syscall_64+0x3f/0x90 [ 57.825544] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.826297] RIP: 0033:0x7eff75e1dd82 [ 57.826831] 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 [ 57.829334] RSP: 002b:00007ffc2e43f778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 57.830375] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff75e1dd82 [ 57.831338] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff75257000 [ 57.832278] RBP: 00007eff75257000 R08: 0000000000000009 R09: 0000000000001000 [ 57.833254] R10: 0000000000000812 R11: 0000000000000206 R12: 000056536eca1ec0 [ 57.834209] R13: 00007ffc2e43f790 R14: 00007ffc2e43f7c0 R15: 00007ffc2e43fb20 [ 57.835175] [ 57.835506] [ 57.835747] Allocated by task 211: [ 57.836228] kasan_save_stack+0x22/0x50 [ 57.836789] kasan_set_track+0x25/0x30 [ 57.837345] __kasan_slab_alloc+0x59/0x70 [ 57.837932] kmem_cache_alloc+0x16b/0x370 [ 57.838477] vm_area_dup+0x20/0x160 [ 57.838938] __split_vma+0x170/0x950 [ 57.839402] split_vma+0xc6/0x110 [ 57.839837] mprotect_fixup+0x8d2/0xb30 [ 57.840341] do_mprotect_pkey+0x87e/0xd40 [ 57.840865] __x64_sys_mprotect+0x78/0xc0 [ 57.841397] do_syscall_64+0x3f/0x90 [ 57.841873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.842525] [ 57.842740] Freed by task 211: [ 57.843138] kasan_save_stack+0x22/0x50 [ 57.843639] kasan_set_track+0x25/0x30 [ 57.844139] kasan_save_free_info+0x2b/0x50 [ 57.844676] __kasan_slab_free+0x10a/0x190 [ 57.845206] kmem_cache_free+0x10d/0x4d0 [ 57.845829] rcu_core+0x8c8/0x2860 [ 57.846303] __do_softirq+0x1b7/0x7d4 [ 57.846860] [ 57.847112] Last potentially related work creation: [ 57.847828] kasan_save_stack+0x22/0x50 [ 57.848447] __kasan_record_aux_stack+0x8e/0xa0 [ 57.849156] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.849957] remove_vma+0x139/0x170 [ 57.850500] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.851175] do_vmi_munmap+0x1f1/0x2b0 [ 57.851827] __vm_munmap+0x138/0x3a0 [ 57.852401] __x64_sys_munmap+0x59/0x80 [ 57.853019] do_syscall_64+0x3f/0x90 [ 57.853629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.854410] [ 57.854675] The buggy address belongs to the object at ffff88801b8c7740 [ 57.854675] which belongs to the cache vm_area_struct of size 168 [ 57.856492] The buggy address is located 88 bytes inside of [ 57.856492] freed 168-byte region [ffff88801b8c7740, ffff88801b8c77e8) [ 57.858223] [ 57.858484] The buggy address belongs to the physical page: [ 57.859292] page:000000000de88a43 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b8c7 [ 57.860653] memcg:ffff88801b883101 [ 57.861174] flags: 0x100000000000200(slab|node=0|zone=1) [ 57.862078] page_type: 0xffffffff() [ 57.862642] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 57.863773] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b883101 [ 57.864892] page dumped because: kasan: bad access detected [ 57.865738] [ 57.866000] Memory state around the buggy address: [ 57.866706] ffff88801b8c7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 57.867751] ffff88801b8c7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 57.868802] >ffff88801b8c7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 57.869860] ^ [ 57.870469] ffff88801b8c7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 57.871508] ffff88801b8c7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 57.872568] ================================================================== [ 57.873968] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 59.761037] BUG: Bad rss-counter state mm:00000000e84df8af type:MM_FILEPAGES val:33 [ 59.761917] BUG: Bad rss-counter state mm:00000000e84df8af type:MM_ANONPAGES val:22 [ 60.361497] BUG: Bad rss-counter state mm:00000000dfa81693 type:MM_FILEPAGES val:33 [ 60.362674] BUG: Bad rss-counter state mm:00000000dfa81693 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15541' (ECDSA) to the list of known hosts. 2023/06/19 21:35:01 fuzzer started 2023/06/19 21:35:01 dialing manager at localhost:44161 2023/06/19 21:35:01 checking machine... 2023/06/19 21:35:01 checking revisions... [ 61.022493] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:35:02 testing simple program... [ 61.060845] cgroup: Unknown subsys name 'net' [ 61.099590] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:34:28 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffd908c7798 CR3=0000000005482000 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=00007f1ba642551000005588c8ab2790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000008000 RCX=0000000000008000 RDX=0000000000000000 RSI=0000000000000005 RDI=000055d2fafa4350 RBP=000055d2fafa4350 RSP=00007ffd89f0ed70 R8 =000055d2fafc4680 R9 =0000000000000000 R10=0000000000000001 R11=000055d2fafc9338 R12=00000000ffffffe3 R13=000055d2fafa4350 R14=0000000000000005 R15=000055d2fafc4680 RIP=00007fb44cffa682 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb44c4c0900 00000000 00000000 GS =0000 0000000000000000 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=00007fb44ca780b0 CR3=000000000ccc6000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000