[ 30.663564] BUG: Bad rss-counter state mm:000000004f994f89 type:MM_FILEPAGES val:33 [ 30.665252] BUG: Bad rss-counter state mm:000000004f994f89 type:MM_ANONPAGES val:22 [ 30.804784] ================================================================== [ 30.805981] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.807136] Read of size 8 at addr ffff88800eb4e5c8 by task sshd/225 [ 30.808286] [ 30.808550] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.809613] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.810813] Call Trace: [ 30.811195] <TASK> [ 30.811534] dump_stack_lvl+0x91/0xf0 [ 30.812114] print_report+0xcc/0x620 [ 30.812719] ? __virt_addr_valid+0x102/0x340 [ 30.813388] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.813971] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.814554] kasan_report+0xbe/0xf0 [ 30.815002] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.815596] vma_interval_tree_remove+0xc75/0xec0 [ 30.816161] vma_prepare+0xc54/0x11a0 [ 30.816623] __split_vma+0x5af/0x950 [ 30.817083] ? __pfx___split_vma+0x10/0x10 [ 30.817586] ? find_held_lock+0x2c/0x110 [ 30.818089] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.818624] ? lock_is_held_type+0x9f/0x120 [ 30.819135] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.819708] ? mtree_range_walk+0x632/0x900 [ 30.820228] ? mas_walk+0x5c7/0x7c0 [ 30.820679] do_vmi_munmap+0x1f1/0x2b0 [ 30.821157] mmap_region+0x1f9/0x2660 [ 30.821610] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.822098] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.822776] ? __pfx_lock_acquire+0x10/0x10 [ 30.823316] ? __pfx_mmap_region+0x10/0x10 [ 30.823937] ? security_mmap_addr+0x7d/0xa0 [ 30.824559] ? get_unmapped_area+0x1f5/0x3f0 [ 30.825226] do_mmap+0x854/0xf00 [ 30.825741] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.826321] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.826979] ksys_mmap_pgoff+0x3af/0x500 [ 30.827575] do_syscall_64+0x3f/0x90 [ 30.828135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.828909] RIP: 0033:0x7f06c420ad82 [ 30.829450] 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 [ 30.831955] RSP: 002b:00007ffec9b873e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.833022] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f06c420ad82 [ 30.834016] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f06c3644000 [ 30.835015] RBP: 00007f06c3644000 R08: 0000000000000009 R09: 0000000000001000 [ 30.836007] R10: 0000000000000812 R11: 0000000000000206 R12: 00005586f148aec0 [ 30.837020] R13: 00007ffec9b87400 R14: 00007ffec9b87430 R15: 00007ffec9b87790 [ 30.838028] </TASK> [ 30.838374] [ 30.838624] Allocated by task 212: [ 30.839125] kasan_save_stack+0x22/0x50 [ 30.839718] kasan_set_track+0x25/0x30 [ 30.840300] __kasan_slab_alloc+0x59/0x70 [ 30.840927] kmem_cache_alloc+0x16b/0x370 [ 30.841532] vm_area_dup+0x20/0x160 [ 30.842063] __split_vma+0x170/0x950 [ 30.842610] split_vma+0xc6/0x110 [ 30.843124] mprotect_fixup+0x8d2/0xb30 [ 30.843712] do_mprotect_pkey+0x87e/0xd40 [ 30.844326] __x64_sys_mprotect+0x78/0xc0 [ 30.844946] do_syscall_64+0x3f/0x90 [ 30.845501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.846258] [ 30.846508] Freed by task 212: [ 30.846968] kasan_save_stack+0x22/0x50 [ 30.847557] kasan_set_track+0x25/0x30 [ 30.848136] kasan_save_free_info+0x2b/0x50 [ 30.848855] __kasan_slab_free+0x10a/0x190 [ 30.849483] kmem_cache_free+0x10d/0x4d0 [ 30.850076] rcu_core+0x8c8/0x2860 [ 30.850596] __do_softirq+0x1b7/0x7d4 [ 30.851157] [ 30.851408] Last potentially related work creation: [ 30.852095] kasan_save_stack+0x22/0x50 [ 30.852685] __kasan_record_aux_stack+0x8e/0xa0 [ 30.853369] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.854124] remove_vma+0x139/0x170 [ 30.854654] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.855308] do_vmi_munmap+0x1f1/0x2b0 [ 30.855877] __vm_munmap+0x138/0x3a0 [ 30.856432] __x64_sys_munmap+0x59/0x80 [ 30.857037] do_syscall_64+0x3f/0x90 [ 30.857593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.858344] [ 30.858593] The buggy address belongs to the object at ffff88800eb4e570 [ 30.858593] which belongs to the cache vm_area_struct of size 168 [ 30.860321] The buggy address is located 88 bytes inside of [ 30.860321] freed 168-byte region [ffff88800eb4e570, ffff88800eb4e618) [ 30.861984] [ 30.862236] The buggy address belongs to the physical page: [ 30.863009] page:0000000076750bcd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb4e [ 30.864285] memcg:ffff888008eddc01 [ 30.864803] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.865560] page_type: 0xffffffff() [ 30.866091] raw: 0100000000000200 ffff88800879fc80 ffffea00003c9c00 0000000000000004 [ 30.867172] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008eddc01 [ 30.868236] page dumped because: kasan: bad access detected [ 30.869021] [ 30.869273] Memory state around the buggy address: [ 30.869954] ffff88800eb4e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.870963] ffff88800eb4e500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.871969] >ffff88800eb4e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.872988] ^ [ 30.873769] ffff88800eb4e600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.874773] ffff88800eb4e680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.875778] ================================================================== [ 30.876882] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.760557] BUG: Bad rss-counter state mm:000000005dfd9369 type:MM_FILEPAGES val:33 [ 32.761627] BUG: Bad rss-counter state mm:000000005dfd9369 type:MM_ANONPAGES val:22 [ 33.229206] BUG: Bad rss-counter state mm:00000000871f28e8 type:MM_FILEPAGES val:33 [ 33.230155] BUG: Bad rss-counter state mm:00000000871f28e8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46604' (ECDSA) to the list of known hosts. 2023/06/19 16:32:03 fuzzer started 2023/06/19 16:32:04 dialing manager at localhost:44161 2023/06/19 16:32:04 checking machine... 2023/06/19 16:32:04 checking revisions... [ 33.944458] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:32:04 testing simple program... [ 34.001280] cgroup: Unknown subsys name 'net' [ 34.047288] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:32:03 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=ffff888008c58000 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=00007f4c470cdda0 CR3=000000000fc0e000 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=2033303a32333a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a32333a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0ff2906 RBX=ffffffff87f94640 RCX=0000000000000000 RDX=ffff888018f551c0 RSI=ffffffff83ab3fa9 RDI=ffffffff87f94830 RBP=0000000000000000 RSP=ffff888016b1f508 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000c2 R11=00000b1400000b14 R12=0000000000000000 R13=00000000000000c2 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff83ab3fc4 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 00007fe7babd7900 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=0000557980462954 CR3=0000000019ffa000 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=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