[ 31.599969] BUG: Bad rss-counter state mm:00000000c28b5103 type:MM_FILEPAGES val:33 [ 31.601834] BUG: Bad rss-counter state mm:00000000c28b5103 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.759764] ================================================================== [ 31.760692] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.761668] Read of size 8 at addr ffff888018cb7a50 by task sshd/226 [ 31.762486] [ 31.762710] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.763610] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.764621] Call Trace: [ 31.764945] <TASK> [ 31.765240] dump_stack_lvl+0x91/0xf0 [ 31.765755] print_report+0xcc/0x620 [ 31.766260] ? __virt_addr_valid+0x102/0x340 [ 31.766833] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.767471] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.768107] kasan_report+0xbe/0xf0 [ 31.768595] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.769237] vma_interval_tree_remove+0xc75/0xec0 [ 31.769861] vma_prepare+0xc54/0x11a0 [ 31.770378] __split_vma+0x5af/0x950 [ 31.770861] ? __pfx___split_vma+0x10/0x10 [ 31.771404] ? find_held_lock+0x2c/0x110 [ 31.771944] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.772528] ? lock_is_held_type+0x9f/0x120 [ 31.773088] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.773715] ? mtree_range_walk+0x632/0x900 [ 31.774292] ? mas_walk+0x5c7/0x7c0 [ 31.774783] do_vmi_munmap+0x1f1/0x2b0 [ 31.775294] mmap_region+0x1f9/0x2660 [ 31.775793] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.776323] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.777060] ? __pfx_lock_acquire+0x10/0x10 [ 31.777611] ? __pfx_mmap_region+0x10/0x10 [ 31.778179] ? security_mmap_addr+0x7d/0xa0 [ 31.778738] ? get_unmapped_area+0x1f5/0x3f0 [ 31.779308] do_mmap+0x854/0xf00 [ 31.779766] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.780278] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.780858] ksys_mmap_pgoff+0x3af/0x500 [ 31.781383] do_syscall_64+0x3f/0x90 [ 31.781883] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.782571] RIP: 0033:0x7f64cdf0fd82 [ 31.783047] 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 [ 31.785296] RSP: 002b:00007fff01b939b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.786255] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f64cdf0fd82 [ 31.787137] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f64cd349000 [ 31.788020] RBP: 00007f64cd349000 R08: 0000000000000009 R09: 0000000000001000 [ 31.788900] R10: 0000000000000812 R11: 0000000000000206 R12: 000055991ad93d90 [ 31.789786] R13: 00007fff01b939d0 R14: 00007fff01b93a00 R15: 00007fff01b93d60 [ 31.790705] </TASK> [ 31.791010] [ 31.791232] Allocated by task 219: [ 31.791680] kasan_save_stack+0x22/0x50 [ 31.792203] kasan_set_track+0x25/0x30 [ 31.792716] __kasan_slab_alloc+0x59/0x70 [ 31.793263] kmem_cache_alloc+0x16b/0x370 [ 31.793797] vm_area_dup+0x20/0x160 [ 31.794284] __split_vma+0x170/0x950 [ 31.794767] split_vma+0xc6/0x110 [ 31.795221] mprotect_fixup+0x8d2/0xb30 [ 31.795742] do_mprotect_pkey+0x87e/0xd40 [ 31.796283] __x64_sys_mprotect+0x78/0xc0 [ 31.796824] do_syscall_64+0x3f/0x90 [ 31.797315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.797983] [ 31.798224] Freed by task 219: [ 31.798628] kasan_save_stack+0x22/0x50 [ 31.799155] kasan_set_track+0x25/0x30 [ 31.799665] kasan_save_free_info+0x2b/0x50 [ 31.800224] __kasan_slab_free+0x10a/0x190 [ 31.800773] kmem_cache_free+0x10d/0x4d0 [ 31.801298] rcu_core+0x8c8/0x2860 [ 31.801757] __do_softirq+0x1b7/0x7d4 [ 31.802289] [ 31.802508] Last potentially related work creation: [ 31.803115] kasan_save_stack+0x22/0x50 [ 31.803628] __kasan_record_aux_stack+0x8e/0xa0 [ 31.804236] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.804912] remove_vma+0x139/0x170 [ 31.805384] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.805959] do_vmi_munmap+0x1f1/0x2b0 [ 31.806477] __vm_munmap+0x138/0x3a0 [ 31.806961] __x64_sys_munmap+0x59/0x80 [ 31.807471] do_syscall_64+0x3f/0x90 [ 31.807963] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.808627] [ 31.808849] The buggy address belongs to the object at ffff888018cb79f8 [ 31.808849] which belongs to the cache vm_area_struct of size 168 [ 31.810394] The buggy address is located 88 bytes inside of [ 31.810394] freed 168-byte region [ffff888018cb79f8, ffff888018cb7aa0) [ 31.811840] [ 31.812067] The buggy address belongs to the physical page: [ 31.812751] page:00000000d28b68bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18cb7 [ 31.813866] memcg:ffff888018d92101 [ 31.814313] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.814981] page_type: 0xffffffff() [ 31.815440] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.816390] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018d92101 [ 31.817325] page dumped because: kasan: bad access detected [ 31.818005] [ 31.818233] Memory state around the buggy address: [ 31.818835] ffff888018cb7900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.819720] ffff888018cb7980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.820609] >ffff888018cb7a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.821485] ^ [ 31.822220] ffff888018cb7a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.823106] ffff888018cb7b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.823982] ================================================================== [ 31.825191] Disabling lock debugging due to kernel taint [ 33.690239] BUG: Bad rss-counter state mm:00000000eb5f4f85 type:MM_FILEPAGES val:33 [ 33.691393] BUG: Bad rss-counter state mm:00000000eb5f4f85 type:MM_ANONPAGES val:22 [ 34.134267] BUG: Bad rss-counter state mm:00000000bfad4498 type:MM_FILEPAGES val:33 [ 34.135664] BUG: Bad rss-counter state mm:00000000bfad4498 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27168' (ECDSA) to the list of known hosts. 2023/06/20 19:47:59 fuzzer started 2023/06/20 19:48:00 dialing manager at localhost:36067 2023/06/20 19:48:00 checking machine... 2023/06/20 19:48:00 checking revisions... [ 34.898822] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:48:00 testing simple program... [ 34.940999] cgroup: Unknown subsys name 'net' [ 34.989726] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:47:59 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88806ce09a18 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff88801a406540 RIP=ffffffff812d8a62 RFL=00000286 [--S--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=00007f5cb6ba8000 CR3=00000000142f2000 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=2039353a37343a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a37343a3931203032 XMM08=303d64696720303d64697520612f6e3d XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09e68 RCX=0000000000000002 RDX=1ffff1100d9e1354 RSI=ffff88806cf09e58 RDI=ffff88806cf09aa0 RBP=0000000000000002 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e58 R15=ffff88806cf09a98 RIP=ffffffff81131c83 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 00007fb0ab7c1900 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=00007fb0ab770008 CR3=000000000b394000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000