syzkaller login: [ 91.158901] BUG: Bad rss-counter state mm:000000003df01082 type:MM_FILEPAGES val:33 [ 91.159993] BUG: Bad rss-counter state mm:000000003df01082 type:MM_ANONPAGES val:22 [ 91.316762] ================================================================== [ 91.317844] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 91.318960] Read of size 8 at addr ffff88800d8b43f8 by task sshd/225 [ 91.320038] [ 91.320303] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 91.321307] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 91.322370] Call Trace: [ 91.322676] [ 91.322950] dump_stack_lvl+0x91/0xf0 [ 91.323411] print_report+0xcc/0x620 [ 91.323871] ? __virt_addr_valid+0x102/0x340 [ 91.324419] ? vma_interval_tree_remove+0xc75/0xec0 [ 91.325004] ? vma_interval_tree_remove+0xc75/0xec0 [ 91.325582] kasan_report+0xbe/0xf0 [ 91.326037] ? vma_interval_tree_remove+0xc75/0xec0 [ 91.326646] vma_interval_tree_remove+0xc75/0xec0 [ 91.327241] vma_prepare+0xc54/0x11a0 [ 91.327708] __split_vma+0x5af/0x950 [ 91.328188] ? __pfx___split_vma+0x10/0x10 [ 91.328715] ? find_held_lock+0x2c/0x110 [ 91.329233] do_vmi_align_munmap+0x2ba/0x11f0 [ 91.329796] ? lock_is_held_type+0x9f/0x120 [ 91.330332] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 91.330938] ? mtree_range_walk+0x632/0x900 [ 91.331484] ? mas_walk+0x5c7/0x7c0 [ 91.331950] do_vmi_munmap+0x1f1/0x2b0 [ 91.332452] mmap_region+0x1f9/0x2660 [ 91.332929] ? vm_mmap_pgoff+0x15c/0x3a0 [ 91.333445] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 91.334158] ? __pfx_lock_acquire+0x10/0x10 [ 91.334679] ? __pfx_mmap_region+0x10/0x10 [ 91.335206] ? security_mmap_addr+0x7d/0xa0 [ 91.335737] ? get_unmapped_area+0x1f5/0x3f0 [ 91.336288] do_mmap+0x854/0xf00 [ 91.336723] vm_mmap_pgoff+0x1a6/0x3a0 [ 91.337219] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 91.337775] ksys_mmap_pgoff+0x3af/0x500 [ 91.338274] do_syscall_64+0x3f/0x90 [ 91.338742] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 91.339390] RIP: 0033:0x7fe668757d82 [ 91.339846] 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 [ 91.341951] RSP: 002b:00007ffcc60e9248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 91.342850] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe668757d82 [ 91.343691] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe667b91000 [ 91.344537] RBP: 00007fe667b91000 R08: 0000000000000009 R09: 0000000000001000 [ 91.345380] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bb76d7bec0 [ 91.346218] R13: 00007ffcc60e9260 R14: 00007ffcc60e9290 R15: 00007ffcc60e95f0 [ 91.347060] [ 91.347343] [ 91.347556] Allocated by task 218: [ 91.347983] kasan_save_stack+0x22/0x50 [ 91.348500] kasan_set_track+0x25/0x30 [ 91.349001] __kasan_slab_alloc+0x59/0x70 [ 91.349516] kmem_cache_alloc+0x16b/0x370 [ 91.350027] vm_area_dup+0x20/0x160 [ 91.350484] __split_vma+0x170/0x950 [ 91.350942] split_vma+0xc6/0x110 [ 91.351385] mprotect_fixup+0x8d2/0xb30 [ 91.351874] do_mprotect_pkey+0x87e/0xd40 [ 91.352387] __x64_sys_mprotect+0x78/0xc0 [ 91.352906] do_syscall_64+0x3f/0x90 [ 91.353371] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 91.354008] [ 91.354219] Freed by task 218: [ 91.354606] kasan_save_stack+0x22/0x50 [ 91.355106] kasan_set_track+0x25/0x30 [ 91.355595] kasan_save_free_info+0x2b/0x50 [ 91.356141] __kasan_slab_free+0x10a/0x190 [ 91.356659] kmem_cache_free+0x10d/0x4d0 [ 91.357158] rcu_core+0x8c8/0x2860 [ 91.357598] __do_softirq+0x1b7/0x7d4 [ 91.358076] [ 91.358291] Last potentially related work creation: [ 91.358873] kasan_save_stack+0x22/0x50 [ 91.359365] __kasan_record_aux_stack+0x8e/0xa0 [ 91.359934] __call_rcu_common.constprop.0+0x6a/0xb90 [ 91.360688] remove_vma+0x139/0x170 [ 91.361140] do_vmi_align_munmap+0xd4a/0x11f0 [ 91.361689] do_vmi_munmap+0x1f1/0x2b0 [ 91.362180] __vm_munmap+0x138/0x3a0 [ 91.362631] __x64_sys_munmap+0x59/0x80 [ 91.363127] do_syscall_64+0x3f/0x90 [ 91.363593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 91.364252] [ 91.364469] The buggy address belongs to the object at ffff88800d8b43a0 [ 91.364469] which belongs to the cache vm_area_struct of size 168 [ 91.365934] The buggy address is located 88 bytes inside of [ 91.365934] freed 168-byte region [ffff88800d8b43a0, ffff88800d8b4448) [ 91.367329] [ 91.367545] The buggy address belongs to the physical page: [ 91.368208] page:00000000c667ce0f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8b4 [ 91.369279] memcg:ffff888010146a01 [ 91.369696] flags: 0x100000000000200(slab|node=0|zone=1) [ 91.370324] page_type: 0xffffffff() [ 91.370771] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 91.371676] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010146a01 [ 91.372576] page dumped because: kasan: bad access detected [ 91.373222] [ 91.373434] Memory state around the buggy address: [ 91.374003] ffff88800d8b4280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 91.374848] ffff88800d8b4300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 91.375682] >ffff88800d8b4380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 91.376547] ^ [ 91.377383] ffff88800d8b4400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 91.378222] ffff88800d8b4480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 91.379069] ================================================================== [ 91.380014] Disabling lock debugging due to kernel taint [ 93.087100] BUG: Bad rss-counter state mm:00000000c784a743 type:MM_FILEPAGES val:33 [ 93.087874] BUG: Bad rss-counter state mm:00000000c784a743 type:MM_ANONPAGES val:22 [ 93.518849] BUG: Bad rss-counter state mm:00000000e8e50a29 type:MM_FILEPAGES val:33 [ 93.519840] BUG: Bad rss-counter state mm:00000000e8e50a29 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25024' (ECDSA) to the list of known hosts. 2023/06/19 23:24:01 fuzzer started 2023/06/19 23:24:01 dialing manager at localhost:44161 2023/06/19 23:24:01 checking machine... 2023/06/19 23:24:01 checking revisions... [ 94.238643] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:24:01 testing simple program... [ 94.274563] cgroup: Unknown subsys name 'net' [ 94.302150] cgroup: Unknown subsys name 'rlimit' executing program [ 97.380086] kmemleak: 2 new suspected memory leaks (see /sys/kernel/debug/kmemleak) executing program executing program VM DIAGNOSIS: 23:24:00 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff88801965f490 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff81371069 RBP=ffff88806ce3a3d8 RSP=ffff88806ce09e00 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000086 R13=ffff88806ce3a3a8 R14=ffff88806ce3a2c0 R15=0000000000000000 RIP=ffffffff8137106f RFL=00000282 [--S----] 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 00007f55b2a5a900 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=00007f55b3011618 CR3=000000001a05e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=ffff888008c58400 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=00007f6247023fd0 CR3=000000000d888000 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=c28a97b8423ce89de142fabf1b794c1e XMM02=000000000011cd30ec2efd57dc4c00df XMM03=00000000001236d88a366d24abc2c4f7 XMM04=fc5a187b7d401c5b00000000000ae988 XMM05=e7a3b750822471340000000000132f20 XMM06=677652512947633100000000001320f8 XMM07=e042d86d42eb936e0000000000123958 XMM08=8a366d24abc2c4f7000000000011cd90 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000