[ 27.262612] BUG: Bad rss-counter state mm:00000000b0f4999f type:MM_FILEPAGES val:33 [ 27.264120] BUG: Bad rss-counter state mm:00000000b0f4999f type:MM_ANONPAGES val:22 [ 27.419692] ================================================================== [ 27.420799] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.421966] Read of size 8 at addr ffff888013ef5ed8 by task sshd/218 [ 27.423104] [ 27.423339] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.424233] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.425225] Call Trace: [ 27.425543] [ 27.425824] dump_stack_lvl+0x91/0xf0 [ 27.426312] print_report+0xcc/0x620 [ 27.426790] ? __virt_addr_valid+0x102/0x340 [ 27.427335] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.427973] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.428617] kasan_report+0xbe/0xf0 [ 27.429123] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.429773] vma_interval_tree_remove+0xc75/0xec0 [ 27.430376] vma_prepare+0xc54/0x11a0 [ 27.430854] __split_vma+0x5af/0x950 [ 27.431382] ? __pfx___split_vma+0x10/0x10 [ 27.431943] ? find_held_lock+0x2c/0x110 [ 27.432492] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.433056] ? lock_is_held_type+0x9f/0x120 [ 27.433598] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.434209] ? mtree_range_walk+0x632/0x900 [ 27.434755] ? mas_walk+0x5c7/0x7c0 [ 27.435232] do_vmi_munmap+0x1f1/0x2b0 [ 27.435738] mmap_region+0x1f9/0x2660 [ 27.436225] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.436749] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.437508] ? __pfx_lock_acquire+0x10/0x10 [ 27.438069] ? __pfx_mmap_region+0x10/0x10 [ 27.438614] ? security_mmap_addr+0x7d/0xa0 [ 27.439147] ? get_unmapped_area+0x1f5/0x3f0 [ 27.439699] do_mmap+0x854/0xf00 [ 27.440138] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.440637] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.441197] ksys_mmap_pgoff+0x3af/0x500 [ 27.441708] do_syscall_64+0x3f/0x90 [ 27.442178] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.442823] RIP: 0033:0x7f670f3a9d82 [ 27.443283] 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 [ 27.445420] RSP: 002b:00007ffd15196568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.446382] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f670f3a9d82 [ 27.447281] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f670e7e3000 [ 27.448158] RBP: 00007f670e7e3000 R08: 0000000000000009 R09: 0000000000001000 [ 27.449003] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d39b9eb20 [ 27.449851] R13: 00007ffd15196580 R14: 00007ffd151965b0 R15: 00007ffd15196910 [ 27.450703] [ 27.451005] [ 27.451220] Allocated by task 211: [ 27.451672] kasan_save_stack+0x22/0x50 [ 27.452176] kasan_set_track+0x25/0x30 [ 27.452664] __kasan_slab_alloc+0x59/0x70 [ 27.453192] kmem_cache_alloc+0x16b/0x370 [ 27.453722] vm_area_dup+0x20/0x160 [ 27.454177] __split_vma+0x170/0x950 [ 27.454652] split_vma+0xc6/0x110 [ 27.455088] mprotect_fixup+0x8d2/0xb30 [ 27.455638] do_mprotect_pkey+0x87e/0xd40 [ 27.456188] __x64_sys_mprotect+0x78/0xc0 [ 27.456749] do_syscall_64+0x3f/0x90 [ 27.457246] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.457898] [ 27.458117] Freed by task 211: [ 27.458511] kasan_save_stack+0x22/0x50 [ 27.459010] kasan_set_track+0x25/0x30 [ 27.459519] kasan_save_free_info+0x2b/0x50 [ 27.460050] __kasan_slab_free+0x10a/0x190 [ 27.460579] kmem_cache_free+0x10d/0x4d0 [ 27.461085] rcu_core+0x8c8/0x2860 [ 27.461528] __do_softirq+0x1b7/0x7d4 [ 27.462006] [ 27.462221] Last potentially related work creation: [ 27.462804] kasan_save_stack+0x22/0x50 [ 27.463382] __kasan_record_aux_stack+0x8e/0xa0 [ 27.463983] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.464681] remove_vma+0x139/0x170 [ 27.465161] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.465746] do_vmi_munmap+0x1f1/0x2b0 [ 27.466237] __vm_munmap+0x138/0x3a0 [ 27.466706] __x64_sys_munmap+0x59/0x80 [ 27.467198] do_syscall_64+0x3f/0x90 [ 27.467691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.468375] [ 27.468593] The buggy address belongs to the object at ffff888013ef5e80 [ 27.468593] which belongs to the cache vm_area_struct of size 168 [ 27.470052] The buggy address is located 88 bytes inside of [ 27.470052] freed 168-byte region [ffff888013ef5e80, ffff888013ef5f28) [ 27.471453] [ 27.471668] The buggy address belongs to the physical page: [ 27.472319] page:00000000e3b288f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13ef5 [ 27.473470] memcg:ffff88800f37bc01 [ 27.473924] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.474590] page_type: 0xffffffff() [ 27.475040] raw: 0100000000000200 ffff88800879fc80 ffffea0000374a40 dead000000000002 [ 27.475967] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f37bc01 [ 27.476868] page dumped because: kasan: bad access detected [ 27.477531] [ 27.477750] Memory state around the buggy address: [ 27.478330] ffff888013ef5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 27.479187] ffff888013ef5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 27.480068] >ffff888013ef5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.480917] ^ [ 27.481649] ffff888013ef5f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 27.482504] ffff888013ef5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.483371] ================================================================== [ 27.484299] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.666681] BUG: Bad rss-counter state mm:000000000f0de866 type:MM_FILEPAGES val:33 [ 29.668318] BUG: Bad rss-counter state mm:000000000f0de866 type:MM_ANONPAGES val:22 [ 30.148550] BUG: Bad rss-counter state mm:0000000054b6bdf2 type:MM_FILEPAGES val:33 [ 30.149697] BUG: Bad rss-counter state mm:0000000054b6bdf2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41383' (ECDSA) to the list of known hosts. 2023/06/20 07:50:52 fuzzer started 2023/06/20 07:50:52 dialing manager at localhost:44161 2023/06/20 07:50:52 checking machine... 2023/06/20 07:50:52 checking revisions... [ 30.850106] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:50:52 testing simple program... [ 30.898645] cgroup: Unknown subsys name 'net' [ 30.939449] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:50:49 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000000361a0 RCX=ffff88806ce361a0 RDX=0000000000000000 RSI=1ffff1100d9c6c3e RDI=ffff88806ce361f0 RBP=ffff88800f6e4200 RSP=ffff88806ce09db8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00000000000001a8 R13=ffffffff87b67200 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff818305f6 RFL=00000083 [--S---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 00007f3aa89bc900 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=00007ffcaad6b000 CR3=0000000019e56000 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=00007f379965ab00 CR3=00000000096ae000 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=2032353a30353a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a30353a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000