[ 39.132193] BUG: Bad rss-counter state mm:00000000634bec88 type:MM_FILEPAGES val:33 [ 39.133532] BUG: Bad rss-counter state mm:00000000634bec88 type:MM_ANONPAGES val:22 [ 39.288353] ================================================================== [ 39.289442] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.290703] Read of size 8 at addr ffff888015d74140 by task sshd/227 [ 39.291497] [ 39.291714] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.292600] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.293625] Call Trace: [ 39.293948] [ 39.294242] dump_stack_lvl+0x91/0xf0 [ 39.294773] print_report+0xcc/0x620 [ 39.295267] ? __virt_addr_valid+0x102/0x340 [ 39.295837] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.296462] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.297094] kasan_report+0xbe/0xf0 [ 39.297580] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.298214] vma_interval_tree_remove+0xc75/0xec0 [ 39.298853] vma_prepare+0xc54/0x11a0 [ 39.299336] __split_vma+0x5af/0x950 [ 39.299825] ? __pfx___split_vma+0x10/0x10 [ 39.300355] ? find_held_lock+0x2c/0x110 [ 39.300889] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.301470] ? lock_is_held_type+0x9f/0x120 [ 39.302022] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.302674] ? mtree_range_walk+0x632/0x900 [ 39.303233] ? mas_walk+0x5c7/0x7c0 [ 39.303709] do_vmi_munmap+0x1f1/0x2b0 [ 39.304209] mmap_region+0x1f9/0x2660 [ 39.304695] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.305210] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.305930] ? __pfx_lock_acquire+0x10/0x10 [ 39.306500] ? __pfx_mmap_region+0x10/0x10 [ 39.307039] ? security_mmap_addr+0x7d/0xa0 [ 39.307583] ? get_unmapped_area+0x1f5/0x3f0 [ 39.308142] do_mmap+0x854/0xf00 [ 39.308582] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.309090] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.309659] ksys_mmap_pgoff+0x3af/0x500 [ 39.310175] do_syscall_64+0x3f/0x90 [ 39.310690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.311350] RIP: 0033:0x7f1a5987ed82 [ 39.311823] 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 [ 39.314000] RSP: 002b:00007ffcaf3294c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.314955] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1a5987ed82 [ 39.315802] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1a58cb8000 [ 39.316655] RBP: 00007f1a58cb8000 R08: 0000000000000009 R09: 0000000000001000 [ 39.317533] R10: 0000000000000812 R11: 0000000000000206 R12: 00005562cbd64ec0 [ 39.318423] R13: 00007ffcaf3294e0 R14: 00007ffcaf329510 R15: 00007ffcaf329870 [ 39.319295] [ 39.319593] [ 39.319817] Allocated by task 215: [ 39.320247] kasan_save_stack+0x22/0x50 [ 39.320753] kasan_set_track+0x25/0x30 [ 39.321252] __kasan_slab_alloc+0x59/0x70 [ 39.321782] kmem_cache_alloc+0x16b/0x370 [ 39.322350] vm_area_dup+0x20/0x160 [ 39.322809] __split_vma+0x170/0x950 [ 39.323280] split_vma+0xc6/0x110 [ 39.323725] mprotect_fixup+0x8d2/0xb30 [ 39.324233] do_mprotect_pkey+0x87e/0xd40 [ 39.324766] __x64_sys_mprotect+0x78/0xc0 [ 39.325287] do_syscall_64+0x3f/0x90 [ 39.325760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.326442] [ 39.326662] Freed by task 215: [ 39.327065] kasan_save_stack+0x22/0x50 [ 39.327576] kasan_set_track+0x25/0x30 [ 39.328074] kasan_save_free_info+0x2b/0x50 [ 39.328612] __kasan_slab_free+0x10a/0x190 [ 39.329149] kmem_cache_free+0x10d/0x4d0 [ 39.329666] rcu_core+0x8c8/0x2860 [ 39.330114] __do_softirq+0x1b7/0x7d4 [ 39.330634] [ 39.330851] Last potentially related work creation: [ 39.331435] kasan_save_stack+0x22/0x50 [ 39.331939] __kasan_record_aux_stack+0x8e/0xa0 [ 39.332518] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.333167] remove_vma+0x139/0x170 [ 39.333625] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.334190] do_vmi_munmap+0x1f1/0x2b0 [ 39.334706] __vm_munmap+0x138/0x3a0 [ 39.335178] __x64_sys_munmap+0x59/0x80 [ 39.335678] do_syscall_64+0x3f/0x90 [ 39.336156] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.336809] [ 39.337027] The buggy address belongs to the object at ffff888015d740e8 [ 39.337027] which belongs to the cache vm_area_struct of size 168 [ 39.338557] The buggy address is located 88 bytes inside of [ 39.338557] freed 168-byte region [ffff888015d740e8, ffff888015d74190) [ 39.339983] [ 39.340198] The buggy address belongs to the physical page: [ 39.340853] page:000000008e3736f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d74 [ 39.342105] memcg:ffff88800e443001 [ 39.342578] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.343243] page_type: 0xffffffff() [ 39.343695] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.344612] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e443001 [ 39.345520] page dumped because: kasan: bad access detected [ 39.346175] [ 39.346445] Memory state around the buggy address: [ 39.347022] ffff888015d74000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.347880] ffff888015d74080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 39.348734] >ffff888015d74100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.349587] ^ [ 39.350218] ffff888015d74180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.351105] ffff888015d74200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.351956] ================================================================== [ 39.353423] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 41.283801] BUG: Bad rss-counter state mm:00000000b07f0eea type:MM_FILEPAGES val:33 [ 41.284819] BUG: Bad rss-counter state mm:00000000b07f0eea type:MM_ANONPAGES val:22 [ 41.772298] BUG: Bad rss-counter state mm:000000006c4e5c14 type:MM_FILEPAGES val:33 [ 41.773238] BUG: Bad rss-counter state mm:000000006c4e5c14 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60355' (ECDSA) to the list of known hosts. 2023/06/19 22:49:53 fuzzer started 2023/06/19 22:49:53 dialing manager at localhost:44161 2023/06/19 22:49:53 checking machine... 2023/06/19 22:49:53 checking revisions... [ 42.480871] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:49:53 testing simple program... [ 42.544796] cgroup: Unknown subsys name 'net' [ 42.609705] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:49:46 Registers: info registers vcpu 0 RAX=00000000ffffffff RBX=0000000000000000 RCX=0000000000000001 RDX=1ffffd4000065fb6 RSI=ffffea000032fd00 RDI=ffffea000032fdb0 RBP=ffffea000032fd80 RSP=ffff88806ce09c40 R8 =0000000000000000 R9 =ffff88807ffdc600 R10=ffffea000032fd70 R11=000000000000cbf5 R12=0000000000000001 R13=ffffea000032fd00 R14=ffffea000032fd00 R15=ffff88807ffdc500 RIP=ffffffff81789b6d 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=00007ffcf6300e68 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=00007f3bf6545510000055a7ad94f790 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=0000000080000000 RBX=0000000000001000 RCX=0000000080000000 RDX=ffff888017d63680 RSI=ffffffff816359ea RDI=0000000000000005 RBP=ffff888017f17e00 RSP=ffff888017f17cf0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888017f17db0 R13=ffff888017f17dc8 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c07f1 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 00007f418fc6e900 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=00007f4190223650 CR3=000000000f34c000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=ffffffffffffff00ffff000000000000 XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000